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AUTOMATIC TRANSAXLE
SECTION AT(HvCVT)
CONTENTS
TROUBLE DIAGNOSIS Ð INDEX.................................. |
3 |
Alphabetical & P No. Index for DTC ........................... |
3 |
PRECAUTIONS ............................................................... |
5 |
Precautions for Supplemental Restraint System |
|
(SRS) ``AIR BAG'' and ``SEAT BELT |
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PRE-TENSIONER''...................................................... |
5 |
Precautions for On Board Diagnostic (OBD) |
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System of CVT and Engine......................................... |
5 |
Precautions .................................................................. |
5 |
Service Notice or Precautions ..................................... |
6 |
Wiring Diagrams and Trouble Diagnosis..................... |
7 |
PREPARATION ............................................................... |
8 |
Special Service Tools .................................................. |
8 |
OVERALL SYSTEM ........................................................ |
9 |
CVT Electrical Parts Location...................................... |
9 |
Circuit Diagram .......................................................... |
10 |
Cross-sectional View Ð RE0F06A............................ |
11 |
Control System .......................................................... |
12 |
ON BOARD DIAGNOSTIC SYSTEM |
|
DESCRIPTION ............................................................... |
15 |
Introduction ................................................................ |
15 |
OBD Function for CVT System ................................. |
15 |
OBD Diagnostic Trouble Code (DTC) ....................... |
15 |
Malfunction Indicator (MI) .......................................... |
18 |
CONSULT-II............................................................... |
18 |
TROUBLE DIAGNOSIS Ð INTRODUCTION ............... |
29 |
Introduction ................................................................ |
29 |
Work Flow.................................................................. |
32 |
TROUBLE DIAGNOSIS Ð BASIC INSPECTION ........ |
34 |
CVT Fluid Check ....................................................... |
34 |
Stall Test.................................................................... |
34 |
Line Pressure Test .................................................... |
35 |
Road Test .................................................................. |
36 |
TROUBLE DIAGNOSIS Ð GENERAL |
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DESCRIPTION ............................................................... |
41 |
TCM Terminals and Reference Value....................... |
41 |
TROUBLE DIAGNOSIS FOR POWER SUPPLY.......... |
45 |
Wiring Diagram Ð CVT Ð MAIN.............................. |
45 |
DTC P0705 PARK/NEUTRAL POSITION (PNP) |
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SWITCH ......................................................................... |
65 |
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Description ................................................................. |
48 |
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Wiring Diagram Ð AT Ð PNP/SW |
50 |
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AT |
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Diagnostic Procedure ................................................ |
51 |
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Component Inspection............................................... |
53 |
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DTC P0710 CVT FLUID TEMPERATURE |
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SENSOR CIRCUIT......................................................... |
54 |
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Description ................................................................. |
54 |
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Wiring Diagram Ð AT Ð FTS................................... |
56 |
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Diagnostic Procedure ................................................ |
57 |
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DTC P0715 PRIMARY SPEED SENSOR ..................... |
59 |
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Description ................................................................. |
59 |
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Wiring Diagram Ð AT Ð VSSA/T............................. |
60 |
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Diagnostic Procedure ................................................ |
61 |
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Component Inspection............................................... |
61 |
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DTC P0720 VEHICLE SPEED SENSOR CVT |
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(SECONDARY SPEED SENSOR) ................................ |
62 |
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Description ................................................................. |
62 |
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Wiring Diagram Ð AT Ð VSSA/T............................. |
64 |
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Diagnostic Procedure ................................................ |
65 |
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Component Inspection............................................... |
65 |
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DTC P0725 ENGINE SPEED SIGNAL ......................... |
66 |
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Description ................................................................. |
66 |
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Wiring Diagram Ð AT Ð ENGSS............................. |
67 |
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Diagnostic Procedure ................................................ |
68 |
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DTC P0740 TORQUE CONVERTER CLUTCH |
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SOLENOID VALVE........................................................ |
69 |
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Description ................................................................. |
69 |
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Wiring Diagram Ð AT Ð TCV .................................. |
71 |
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Diagnostic Procedure ................................................ |
72 |
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Component Inspection............................................... |
73 |
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DTC P0745 LINE PRESSURE SOLENOID VALVE ..... |
74 |
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Description ................................................................. |
74 |
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Wiring Diagram Ð AT Ð LPSV ................................ |
76 |
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Diagnostic Procedure ................................................ |
77 |
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Component Inspection............................................... |
78 |
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CONTENTS (Cont'd)
DTC P1705 THROTTLE POSITION SENSOR ............. |
79 |
Description ................................................................. |
79 |
Wiring Diagram Ð AT Ð TPS .................................. |
81 |
Diagnostic Procedure ................................................ |
82 |
Component Inspection............................................... |
85 |
DTC P1777 STEP MOTOR Ð CIRCUIT....................... |
86 |
Description ................................................................. |
86 |
Wiring Diagram Ð AT Ð STM.................................. |
88 |
Diagnostic Procedure ................................................ |
89 |
Component Inspection............................................... |
90 |
DTC P1778 STEP MOTOR Ð FUNCTION................... |
91 |
Description ................................................................. |
91 |
Diagnostic Procedure ................................................ |
93 |
DTC P1791 CVT FLUID PRESSURE SENSOR ........... |
94 |
Description ................................................................. |
94 |
Wiring Diagram Ð AT Ð FPS .................................. |
96 |
Diagnostic Procedure ................................................ |
97 |
Component Inspection............................................... |
98 |
CVT SAFE FUNCTION.................................................. |
99 |
Description ................................................................. |
99 |
Diagnostic Procedure .............................................. |
100 |
CONTROL UNIT (RAM), CONTROL UNIT (ROM)..... |
101 |
Description ............................................................... |
101 |
Diagnostic Procedure .............................................. |
102 |
CONTROL UNIT (EEPROM) ....................................... |
103 |
Description ............................................................... |
103 |
Diagnostic Procedure .............................................. |
104 |
TROUBLE DIAGNOSES FOR NON-DETECTABLE |
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ITEMS........................................................................... |
105 |
PNP Switch, Stop Lamp Switch and Throttle |
|
Position Switch ........................................................ |
105 |
Wiring Diagram Ð AT Ð NONDTC ........................ |
110 |
ON-VEHICLE SERVICE .............................................. |
113 |
Control Cable Adjustment........................................ |
113 |
Park/Neutral Position (PNP) Switch Adjustment ..... |
113 |
Differential Side Oil Seal Replacement ................... |
113 |
REMOVAL AND INSTALLATION ............................... |
115 |
Removal................................................................... |
115 |
Inspection................................................................. |
115 |
Installation................................................................ |
116 |
Air Breather Hose .................................................... |
117 |
CVT Fluid Cooler (Hyper CVT-M6) ......................... |
117 |
Components............................................................. |
118 |
SERVICE DATA AND SPECIFICATIONS (SDS) ....... |
119 |
General Specifications............................................. |
119 |
Stall Revolution........................................................ |
119 |
Line Pressure........................................................... |
119 |
Removal and Installation ......................................... |
119 |
AT-2
TROUBLE DIAGNOSIS Ð INDEX
Alphabetical & P No. Index for DTC
Alphabetical & P No. Index for DTC
NCAT0001
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ALPHABETICAL INDEX FOR DTC |
NCAT0001S01 |
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Items |
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DTC |
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Reference page |
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CONSULT-II |
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(CONSULT-II screen terms) |
ECM*1 |
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GST*2 |
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ATF TEMP SEN/CIRC |
0710 |
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P0710 |
AT-54 |
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ENG SPEED SIG |
0725 |
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P0725 |
AT-66 |
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LINE PRESSURE SEN |
1791 |
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P1791 |
AT-94 |
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L/PRESS SOL/CIRC |
0745 |
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P0745 |
AT-74 |
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PNP SW/CIRC |
0705 |
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P0705 |
AT-48 |
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PRI SPEED SIG/CIRC |
0715 |
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P0715 |
AT-59 |
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STEP MOTOR/CIRC |
1777 |
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P1777 |
AT-86 |
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STEP MOTOR/FNCTN |
1778 |
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P1778 |
AT-91 |
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TP SEN/CIRC A/T*3 |
1705 |
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P1705 |
AT-79 |
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TCC SOLENOID/CIRC |
0740 |
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P0740 |
AT-69 |
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VEH SPD SEN/CIR A/T |
0720 |
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P0720 |
AT-62 |
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*1: In Diagnostic Test Mode II (Self-diagnostic results), these numbers are controlled by NISSAN. *2: These numbers are prescribed by ISO15031-6.
*3: When the fail-safe operation occurs, the MI illuminates.
AT-3
TROUBLE DIAGNOSIS Ð INDEX
Alphabetical & P No. Index for DTC (Cont'd)
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P NO. INDEX FOR DTC |
=NCAT0001S02 |
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DTC |
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Items |
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Reference page |
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CONSULT-II |
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ECM*1 |
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(CONSULT-II screen terms) |
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GST*2 |
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P0705 |
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0705 |
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PNP SW/CIRC |
AT-48 |
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P0710 |
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0710 |
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ATF TEMP SEN/CIRC |
AT-54 |
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P0715 |
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0715 |
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PRI SPEED SIG/CIRC |
AT-59 |
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P0720 |
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0720 |
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VEH SPD SEN/CIR AT |
AT-62 |
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P0725 |
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0725 |
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ENG SPEED SIG |
AT-66 |
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P0740 |
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0740 |
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TCC SOLENOID/CIRC |
AT-69 |
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P0745 |
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0745 |
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L/PRESS SOL/CIRC |
AT-74 |
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P1705 |
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1705 |
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TP SEN/CIRC A/T*3 |
AT-79 |
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P1777 |
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1777 |
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STEP MOTOR/CIRC |
AT-86 |
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P1778 |
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1778 |
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STEP MOTOR/FNCTN |
AT-91 |
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P1791 |
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1791 |
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LINE PRESSURE SEN |
AT-94 |
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*1: In Diagnostic Test Mode II (Self-diagnostic results), these numbers are controlled by NISSAN. *2: These numbers are prescribed by ISO15031-6.
*3: When the fail-safe operation occurs, the MI illuminates.
AT-4
PRECAUTIONS
Precautions for Supplemental Restraint System (SRS) ``AIR BAG'' and ``SEAT BELT PRE-TENSIONER''
Precautions for Supplemental Restraint System (SRS) ``AIR BAG'' and ``SEAT BELT
PRE-TENSIONER''
NCAT0002
The Supplemental Restraint System ``AIR BAG'' and ``SEAT BELT PRE-TENSIONER'', used along with a seat belt, help to reduce the risk or severity of injury to the driver and front passenger in a frontal collision. The Supplemental Restraint System consists of air bag modules (located in the center of the steering wheel and on the instrument panel on the passenger side), seat belt pre-tensioners, a diagnosis sensor unit, warning lamp, wiring harness and spiral cable.
In addition to the supplemental air bag modules for a frontal collision, the supplemental side air bag used along with the seat belt helps to reduce the risk or severity of injury to the driver and front passenger in a side collision. The supplemental side air bag consists of air bag modules (located in the outer side of front seats), satellite sensor, diagnosis sensor unit (one of components of supplemental air bags for a frontal collision), wiring harness, warning lamp (one of components of supplemental air bags for a frontal collision). Information necessary to service the system safely is included in the RS section of this Service Manual.
WARNING:
+To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in the event of a collision which would result in air bag inflation, all maintenance must be performed by an authorized NISSAN dealer.
+Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal injury caused by unintentional activation of the system.
+Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this Service Manual. SRS wiring harnesses (except ``SEAT BELT PRE-TENSIONER'' connector) can be identified with yellow harness connector (and with yellow harness protector or yellow insulation tape before the harness connectors).
Precautions for On Board Diagnostic (OBD)
System of CVT and Engine
NCAT0198
The ECM has an on board diagnostic system. It will light up the malfunction indicator (MI) to warn the driver of a malfunction causing emission deterioration.
CAUTION:
+Be sure to turn the ignition switch ``OFF'' and disconnect the negative battery terminal before any repair or inspection work. The open/short circuit of related switches, sensors, solenoid valves, etc. will cause the MI to light up.
+Be sure to connect and lock the connectors securely after work. A loose (unlocked) connector will cause the MI to light up due to an open circuit. (Be sure the connector is free from water, grease, dirt, bent terminals, etc.)
+Be sure to route and secure the harnesses properly after work. Interference of the harness with a bracket, etc. may cause the MI to light up due to a short circuit.
+Be sure to connect rubber tubes properly after work. A misconnected or disconnected rubber tube may cause the MI to light up due to a malfunction of the EGR system or fuel injection system, etc.
+Be sure to erase the unnecessary malfunction information (repairs completed) from the TCM and ECM before returning the vehicle to the customer.
Precautions
NCAT0003
+ Before connecting or disconnecting the TCM harness connector, turn ignition switch OFF and disconnect negative battery terminal. Failure to do so may damage the TCM. Because battery voltage is applied to TCM even if ignition switch is turned off.
SEF289H
AT-5
PRECAUTIONS
Precautions (Cont'd)
+When connecting or disconnecting pin connectors into or from TCM, take care not to damage pin terminals (bend or break).
Make sure that there are not any bends or breaks on TCM pin terminal, when connecting pin connectors.
Bend |
Break |
SEF291H |
|
|
Perform TCM input/output signal inspection before replacement.
+Before replacing TCM, perform TCM input/output signal inspection and make sure whether TCM functions properly or not. (See page AT-41.)
MEF040DA
+After performing each TROUBLE DIAGNOSIS, perform ``DTC (Diagnostic Trouble Code) CONFIRMATION PROCEDURE''.
The DTC should not be displayed in the ``DTC CONFIRMATION PROCEDURE'' if the repair is completed.
SAT652J
+It is very important to perform functional tests whenever they are indicated.
+Extreme care should be taken to avoid damage to O-rings, seals and gaskets when assembling.
+When the CVT drain plug is removed, only some of the fluid is drained. Old CVT fluid will remain in torque converter and CVT fluid cooling system.
Always follow the procedures under ``Changing CVT Fluid'' in the MA section when changing CVT fluid.
Service Notice or Precautions
NCAT0004
FAIL-SAFE
NCAT0004S01
The TCM has an electronic Fail-Safe (limp home mode). This allows the vehicle to be driven even if a major electrical input/output device circuit is damaged.
Under Fail-Safe, the vehicle always runs even with a shift lever position of ``L'' or ``D''. The customer may complain of sluggish or poor acceleration.
When the ignition key is turned ``ON'' following Fail-Safe operation, CVT or SPORT indicator lamp blinks for about 8 seconds. [For ``TCM SELF-DIAGNOSTIC PROCEDURE (No Tools)'', refer to AT-25.]
Fail-Safe may occur without electrical circuit damage if the vehicle is driven under extreme conditions (such as excessive wheel spin followed by sudden braking). To recover normal shift pattern, turn the ignition key ``OFF'' for 5 seconds, then ``ON''.
AT-6
PRECAUTIONS
Service Notice or Precautions (Cont'd)
The blinking of the CVT or SPORT indicator lamp for about 8 seconds will appear only once and be cleared. The customer may resume normal driving conditions.
Always follow the ``WORK FLOW'' (Refer to AT-32). The SELF-DIAGNOSIS results will be as follows:
The first SELF-DIAGNOSIS will indicate damage to the vehicle speed sensor or the revolution sensor. During the next SELF-DIAGNOSIS, performed after checking the sensor, no damages will be indicated.
OBD SELF-DIAGNOSIS
NCAT0004S04
+CVT self-diagnosis is performed by the TCM in combination with the ECM. The results can be read through the blinking pattern of the CVT or SPORT indicator. Refer to the table on AT-19 for the indicator used to display each self-diagnostic result.
+The self-diagnostic results indicated by the MI are automatically stored in both the ECM and TCM memories.
Always perform the procedure ``HOW TO ERASE DTC'' on AT-16 to complete the repair and avoid unnecessary blinking of the MI.
For details of OBD, refer to EC section (``ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION'').
+Certain systems and components, especially those related to OBD, may use a new style slidelocking type harness connector.
For description and how to disconnect, refer to EL section, ``Description'', ``HARNESS CONNECTOR''.
Wiring Diagrams and Trouble Diagnosis
NCAT0005
When you read wiring diagrams, refer to the followings:
+``HOW TO READ WIRING DIAGRAMS'' in GI section
+``POWER SUPPLY ROUTING'' for power distribution circuit in EL section When you perform trouble diagnosis, refer to the followings:
+``HOW TO FOLLOW TEST GROUP IN TROUBLE DIAGNOSIS'' in GI section
+``HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT'' in GI section
AT-7
PREPARATION
Special Service Tools
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Special Service Tools |
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NCAT0006 |
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Tool number |
Description |
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Tool name |
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ST2505S001 |
Measuring line pressure and governor pressure |
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Oil pressure gauge set |
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1 ST25051001 |
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Oil pressure gauge |
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2 ST25052000 |
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Hose |
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3 ST25053000 |
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Joint pipe |
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4 ST25054000 |
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Adapter |
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5 ST25055000 |
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Adapter |
NT097 |
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KV31103000 |
Installing differential side oil seal |
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Drift |
(Use with ST35325000) |
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a: 59 mm (2.32 in) dia. |
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b: 49 mm (1.93 in) dia. |
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NT105 |
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ST35325000 |
Installing differential side oil seal |
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Drift |
(Use with KV31103000) |
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a: 215 mm (8.46 in) |
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b: 25 mm (0.98 in) dia. |
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c: M12 x 1.5P |
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NT417 |
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AT-8
OVERALL SYSTEM
CVT Electrical Parts Location
CVT Electrical Parts Location
NCAT0008
Steering column
Front |
Indicator C/U |
|
TCM
PNP switch
Control valve connector
Inside control valve
Fluid temperature sensor Fluid pressure sensor Lock-up solenoid
Line pressure solenoid Step motor
Secondary speed sensor
SPORT mode switch
Dropping resistor
Primary speed sensor
Throttle position sensor and throttle position switch
SPORT indicator lamp
CVT indicator lamp
Manual mode switch
SAT671J
AT-9
Circuit Diagram
FUSE
BATTERY
ON or START
IGNITION SWITCH
OVERALL SYSTEM
Circuit Diagram
NCAT0009
CONNECTOR
DATA LINK
ECM
ECCS RELAY
CLOSED
WIDE
OPEN
THROTTLE |
POSITION |
SENSOR |
SECONDARY SPEED SENSOR
PRIMARY
SPEED
SENSOR
THROTTLE
POSITION
SWITCH
TCM
SPORT indicator lamp |
CVT indicator (warning) lamp |
: Hyper CVT models |
: Hyper CVT M6 models |
|
CONTROL VALVE |
|||
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CVT FLUID |
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TEMPERATURE |
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SENSOR |
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DROPPING RESISTOR |
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CVT FLUID |
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PRESSURE |
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SENSOR |
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LINE |
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PRESSURE |
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SOLENOID |
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VALVE |
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TORQUE |
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CONVERTER |
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CLUTCH |
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SOLENOID |
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VALVE |
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STEP MOTOR |
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ABS |
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CONTROL UNIT |
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SPORT MODE |
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SWITCH |
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CONTROL DEVICE |
SHIFT DOWN |
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MANUAL MODE SWITCH |
SWITCH |
SHIFT UP SWITCH |
MANUAL MODE AUTOMATIC MODE |
||
STOP LAMP SWITCH
PARK/NEUTRAL POSITION SWITCH |
RP N D L |
|
INDICATOR |
|
CONTROL UNIT |
|
COMBINATION METER |
|
UNIFIED METER |
|
CONTROL UNIT |
YAT142
AT-10
OVERALL SYSTEM
Cross-sectional View Ð RE0F06A
Steel belt
Sun gear
Side cover
Internal gear
Cross-sectional View Ð RE0F06A
NCAT0011
Converter housing
Primary pulley Reverse brake Oil pump
Planet carrier |
Forward clutch |
|
Torque converter
Input shaft
Parking gear
Output gear
Taper roller bearing
Reduction gear
Idler gear
Speedometer drive gear
Secondary pulley
Differential case
Final gear
SAT668J
AT-11
OVERALL SYSTEM
Control System
Control System
=NCAT0014
OUTLINE
NCAT0014S01
The CVT senses vehicle operating conditions through various sensors. It always controls the optimum shift position and reduces shifting and lock-up shocks.
SENSORS |
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TCM |
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ACTUATORS |
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PNP switch |
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Throttle position sensor |
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Closed throttle position switch |
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Wide open throttle position switch |
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Shift control |
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Step motor |
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Engine speed signal |
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Line pressure control |
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CVT indicator (warning) lamp |
|||
CVT fluid temperature sensor |
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Lock-up control |
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(Hyper CVT M6 only) |
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CVT fluid pressure sensor |
c |
Fail-safe control |
c |
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Torque converter clutch |
|||||
Primary speed sensor |
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Self-diagnosis |
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solenoid valve |
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Secondary speed sensor |
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CONSULT-II communication |
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Line pressure solenoid valve |
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Stop lamp switch |
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line control |
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SPORT indicator lamp (Hyper |
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Sport mode switch (Hyper CVT |
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Duet-EU control |
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CVT only) |
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only) |
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On board diagnosis |
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Indicator control unit (Hyper CVT |
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M6 only) |
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ABS control unit |
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AT-12
OVERALL SYSTEM
Control System (Cont'd)
CONTROL SYSTEM
NCAT0014S02
Transaxle
Wheel |
Differential |
Final gear |
Belt and |
gear |
Pulley |
Parking system
Control device
Sport mode SW or manual mode SW
[Hyper CVT-M6] |
Primary pulley |
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speed and |
|
secondary pulley |
Position |
speed sensor |
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indicator |
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CVT indicator |
|
(warning) lamp or |
Indicator C/U |
SPORT indicator lamp |
|
TCM
Mechanical system
Oil system
Electrical system
PNP switch
Forward and |
Torque |
|
reverse |
||
converter |
||
change |
||
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Oil pressure control
Electrical control
Control valve
ECM
ABS C/U
Stop lamp SW
Engine
Oil pump
Engine speed sensor
Throttle opening sensor
NAT310
AT-13
OVERALL SYSTEM
Control System (Cont'd)
TCM FUNCTION
=NCAT0014S03
The function of the TCM is to:
+Receive input signals sent from various switches and sensors.
+Determine required line pressure, shifting point and lock-up operation.
+Send required output signals to the step motor and the respective solenoids.
INPUT/OUTPUT SIGNAL OF TCM
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NCAT0014S04 |
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Sensors and actuators |
Function |
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PNP switch |
Detects select lever position and sends a signal to TCM. |
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Throttle position sensor |
Detects throttle valve position and sends a signal to TCM. |
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Closed throttle position switch |
Detects throttle valve's fully-closed position and sends a signal to TCM. |
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Wide open throttle position switch |
Detects a throttle valve position of greater than 1/2 of full throttle and |
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sends a signal to TCM. |
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Engine speed signal |
From ECM. |
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CVT fluid temperature sensor |
Detects transmission fluid temperature and sends a signal to TCM. |
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CVT fluid pressure sensor |
Detects transmission fluid pressure and sends a signal to TCM. |
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Input |
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Primary speed sensor |
Detects primary pulley rpm and sends a signal to TCM. |
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Secondary speed sensor |
Detects secondary pulley rpm and sends a signal to TCM. |
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Stop lamp switch |
Sends a signal to the TCM relaying the operation condition of the brake |
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pedal. |
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Sport mode switch |
Sends a signal to the TCM relaying the operation condition of the sport |
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mode switch. |
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Indicator control unit*1 |
Sends a signal to the TCM operation condition of the manual mode switch |
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in control device. |
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ABS control unit |
Sends a signal to the TCM operation condition of the ABS. |
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Step motor |
Regulates pulley position in relation to a signal sent from TCM. |
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Line pressure solenoid valve |
Regulates (or decreases) line pressure suited to driving conditions in rela- |
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tion to a signal sent from TCM. |
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Torque converter clutch solenoid |
Regulates (or decreases) lock-up pressure suited to driving conditions in |
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valve |
relation to a signal sent from TCM. |
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CVT indicator (warning) lamp*2 |
Shows TCM faults, when CVT control components malfunction. |
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SPORT indicator lamp*3 |
Shows the operation condition of the SPORT mode switch. *3 |
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Indicator control unit *1 |
Receives the information of gear position on manual mode from TCM, and |
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sends a signal to indicator. |
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*1: Hyper CVT M6 models only |
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*2: Hyper CVT M6 models |
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*3: Hyper CVT models |
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AT-14
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Introduction
Introduction
NCAT0017
The CVT system has two self-diagnostic systems.
The first is the emission-related on board diagnostic system (OBD) performed by the TCM in combination with the ECM. The malfunction is indicated by the MI (malfunction indicator) and is stored as a DTC in the ECM memory but not the TCM memory.
The second is the TCM original self-diagnosis indicated by the CVT indicator (warning) lamp or SPORT indicator lamp. The malfunction is stored in the TCM memory. The detected items are overlapped with OBD selfdiagnostic items. For detail, refer to AT-26.
OBD Function for CVT System
NCAT0018
The ECM provides emission-related on board diagnostic (OBD) functions for the CVT system. One function is to receive a signal from the TCM used with OBD-related parts of the CVT system. The signal is sent to the ECM when a malfunction occurs in the corresponding OBD-related part. The other function is to indicate a diagnostic result by means of the MI (malfunction indicator) on the instrument panel. Sensors, switches and solenoid valves are used as sensing elements.
The MI automatically illuminates in Two Trip Detection Logic when a malfunction is sensed in relation to CVT system parts.
OBD Diagnostic Trouble Code (DTC)
NCAT0020
HOW TO READ DTC AND 1ST TRIP DTC
NCAT0020S01
DTC and 1st trip DTC can be read by the following methods.
1. ( |
No Tools) The number of blinks of the malfunction indicator in the Diagnostic Test Mode II (Self- |
Diagnostic Results) Examples: 0705, 0710, 0715, 0720, etc. For details, refer to EC section [``Malfunction Indicator (MI)'', ``ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION''].
These DTCs are controlled by NISSAN.
2. ( |
with CONSULT-II or |
GST) CONSULT-II or GST (Generic Scan Tool) Examples: P0705, P0710, |
P0720, P0725, etc.
These DTCs are prescribed by ISO15031-6.
(CONSULT-II also displays the malfunctioning component or system.)
+1st trip DTC No. is the same as DTC No.
+Output of the diagnostic trouble code indicates that the indicated circuit has a malfunction. However, in case of the Mode II and GST they do not indicate whether the malfunction is still occurring or occurred in the past and returned to normal.
CONSULT-II can identify them as shown below. Therefore, using CONSULT-II (if available) is recommended.
A sample of CONSULT-II display for DTC is shown at left. DTC or 1st trip DTC of a malfunction is displayed in SELF-DIAGNOSTIC RESULTS mode for ``ENGINE'' with CONSULT-II. Time data indicates how many times the vehicle was driven after the last detection of a DTC.
SAT651J
If the DTC is being detected currently, the time data will be ``0''.
AT-15
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
OBD Diagnostic Trouble Code (DTC) (Cont'd)
SAT581J
If a 1st trip DTC is stored in the ECM, the time data will be ``1t''.
SAT582J
Freeze Frame Data and 1st Trip Freeze Frame Data
NCAT0020S0101
The ECM has a memory function, which stores the driving condition such as fuel system status, calculated load value, engine coolant temperature, short term fuel trim, long term fuel trim, engine speed and vehicle speed at the moment the ECM detects a malfunction.
Data which are stored in the ECM memory, along with the 1st trip DTC, are called 1st trip freeze frame data, and the data, stored together with the DTC data, are called freeze frame data and displayed on CONSULT-II or GST. The 1st trip freeze frame data can only be displayed on the CONSULT-II screen, not on the GST. For detail, refer to EC section (``CONSULT-II'', ``ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION'').
Only one set of freeze frame data (either 1st trip freeze frame data of freeze frame data) can be stored in the ECM. 1st trip freeze frame data is stored in the ECM memory along with the 1st trip DTC. There is no priority for 1st trip freeze frame data and it is updated each time a different 1st trip DTC is detected. However, once freeze frame data (2nd trip detection/MI on) is stored in the ECM memory, 1st trip freeze frame data is no longer stored. Remember, only one set of freeze frame data can be stored in the ECM.
The ECM has the following priorities to update the data.
Prior- |
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1 |
Freeze frame data |
Misfire Ð DTC: P0300 - P0306 (0300 - 0306) |
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Fuel Injection System Function Ð DTC: P0171 (0171), P0172 (0172), P0174 (0174), P0175 |
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(0175) |
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2 |
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Except the above items (Includes CVT related items) |
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3 |
1st trip freeze frame data |
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Both 1st trip freeze frame data and freeze frame data (along with the DTCs) are cleared when the ECM memory is erased.
HOW TO ERASE DTC
NCAT0020S02
The diagnostic trouble code can be erased by CONSULT-II, GST or ECM DIAGNOSTIC TEST MODE as described following.
+If the battery terminal is disconnected, the diagnostic trouble code will be lost within 24 hours.
+When you erase the DTC, using CONSULT-II or GST is easier and quicker than switching the mode selector on the ECM.
AT-16
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
OBD Diagnostic Trouble Code (DTC) (Cont'd)
The following emission-related diagnostic information is cleared from the ECM memory when erasing DTC related to OBD. For details, refer to EC section (``Emission-related Diagnostic Information'', ``ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION'').
+Diagnostic trouble codes (DTC)
+1st trip diagnostic trouble codes (1st trip DTC)
+Freeze frame data
+1st trip freeze frame data
+System readiness test (SRT) codes
+Test values
+Distance traveled while MI is activated
+Others
HOW TO ERASE DTC (WITH CONSULT-II)
NCAT0020S03
+If a DTC is displayed for both ECM and TCM, it needs to be erased for both ECM and TCM.
1.If the ignition switch stays ``ON'' after repair work, be sure to turn ignition switch ``OFF'' once. Wait at least 5 seconds and then turn it ``ON'' (engine stopped) again.
2.Turn CONSULT-II ``ON'' and touch ``CVT''.
3.Touch ``SELF-DIAG RESULTS''.
4.Touch ``ERASE''. (The DTC in the TCM will be erased.) Then touch ``BACK'' twice.
5.Touch ``ENGINE''.
6.Touch ``SELF-DIAG RESULTS''.
7.Touch ``ERASE''. (The DTC in the ECM will be erased.)
How to erase DTC (With CONSULT-II)
1.If the ignition switch stays ``ON'' after repair work, be sure to turn ignition switch ``OFF'' once. Wait at least 5 seconds and then turn it ``ON'' (engine stopped) again.
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2. Turn CONSULT-II ``ON'', and touch ``CVT''. |
3. Turn ``SELF DIAGNOSIS''. |
4. Touch ``ERASE''. (The DTC in |
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the TCM will be erased.) |
Touch |
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``BACK'' |
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``BACK'' |
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5. Touch ``ENGINE''. |
6. Touch ``SELF DIAGNOSIS''. |
7. Touch ``ERASE''. (The DTC in the |
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ECM will be erased.) |
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SAT681J |
AT-17
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
OBD Diagnostic Trouble Code (DTC) (Cont'd)
HOW TO ERASE DTC (WITH GST)
NCAT0020S04
1.If the ignition switch stays ``ON'' after repair work, be sure to turn ignition switch ``OFF'' once. Wait at least 5 seconds and then turn it ``ON'' (engine stopped) again.
2.Perform ``OBD SELF-DIAGNOSTIC PROCEDURE (No Tools)''. Refer to AT-25. (The engine warm-up step can be skipped when performing the diagnosis only to erase the DTC.)
3.Select Mode 4 with Generic Scan Tool (GST). For details, refer to EC section ``Generic Scan Tool (GST)''.
HOW TO ERASE DTC (NO TOOLS)
NCAT0020S05
1.If the ignition switch stays ``ON'' after repair work, be sure to turn ignition switch ``OFF'' once. Wait at least 5 seconds and then turn it ``ON'' (engine stopped) again.
2.Perform ``TCM SELF-DIAGNOSTIC PROCEDURE (No Tools)''. Refer to AT-25. (The engine warm-up step can be skipped when performing the diagnosis only to erase the DTC.)
3.Change the diagnostic test mode from Mode II to Mode I by turning the mode selector on the ECM. Refer to EC section ``HOW TO SWITCH DIAGNOSTIC TEST MODES''.
Malfunction Indicator (MI)
NCAT0021
1.The malfunction indicator will light up when the ignition switch is turned ON without the engine running. This is for checking the lamp.
+If the malfunction indicator does not light up, refer to EL section (``Warning Lamps/System Description'', ``WARNING LAMPS AND CHIME'').
(Or see MI & Data Link Connectors in EC section.)
2.When the engine is started, the malfunction indicator should go
off.
SAT652J If the lamp remains on, the on board diagnostic system has detected an emission-related (OBD) malfunction. For detail, refer to EC section (``ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION'').
CONSULT-II
NCAT0022
After performing ``SELF-DIAGNOSTIC PROCEDURE (WITH CON- SULT-II)'' (AT-19), place check marks for results on the ``DIAGNOSTIC WORKSHEET'', AT-31. Reference pages are provided following the items.
NOTICE:
+Additional CONSULT-II information can be found in the Operation Manual supplied with the CONSULT-II unit.
AT-18
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
CONSULT-II (Cont'd)
SELF-DIAGNOSTIC PROCEDURE
(WITH CONSULT-II)
NCAT0022S02
1.Turn on CONSULT-II and touch ``ENGINE'' for OBD detected items or touch ``CVT'' for TCM self-diagnosis.
If CVT is not displayed, check TCM power supply and ground circuit. Refer to AT-41. If result is NG, refer to EL section (``POWER SUPPLY ROUTING'').
SAT651J
2.Touch ``SELF DIAGNOSIS''.
Display shows malfunction experienced since the last erasing operation.
CONSULT-II performs REAL-TIME SELF-DIAGNOSIS.
Also, any malfunction detected while in this mode will be displayed at real time.
SAT584J
SELF-DIAGNOSTIC RESULT TEST MODE
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NCAT0022S03 |
Detected items |
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TCM self-diagnosis |
OBD (DTC) |
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(Screen terms for CONSULT-II, ``SELF |
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DIAGNOSIS'' test mode) |
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Malfunction is detected when ... |
Available by |
Available by |
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CVT or SPORT |
malfunction |
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``CVT'' |
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``ENGINE'' |
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indicator lamp |
indicator lamp*2, |
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``CVT'' on CON- |
``ENGINE'' on CON- |
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SULT-II |
SULT-II or GST |
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PNP switch circuit |
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+ TCM does not receive the correct volt- |
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age signal (based on the gear posi- |
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P0705 |
PNP SW/CIRCUIT |
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PNP SW/CIRC |
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Primary speed sensor |
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+ TCM does not receive the proper volt- |
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age signal from the sensor. |
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P0715 |
I/P PULLY SPD SIG |
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PRI SPEED SIG/ |
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CIRC |
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Secondary speed sensor |
+ TCM does not receive the proper volt- |
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age signal from the sensor. |
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P0720 |
VEHICLE SPEED |
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VEH SPD SEN/CIR |
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A/T |
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T/C clutch solenoid valve |
+ TCM detects an improper voltage |
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drop when it tries to operate the sole- |
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P0740 |
T/C CLUTCH |
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TCC SOLENOID/ |
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noid valve. |
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CIRC |
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Line pressure solenoid valve |
+ TCM detects an improper voltage |
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drop when it tries to operate the sole- |
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P0745 |
LINE PRESSURE |
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L/PRESS SOL/ |
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noid valve. |
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S/V |
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CIRC |
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Throttle position sensor, |
+ TCM receives an excessively low or |
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Throttle position switch |
high voltage from the sensor. |
X |
P1705 |
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THROTTLE POSI |
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TP SEN/CIRC A/T |
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SEN |
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AT-19
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
CONSULT-II (Cont'd)
Detected items |
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TCM self-diagnosis |
OBD (DTC) |
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(Screen terms for CONSULT-II, ``SELF |
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DIAGNOSIS'' test mode) |
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Malfunction is detected when ... |
Available by |
Available by |
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CVT or SPORT |
malfunction |
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``CVT'' |
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``ENGINE'' |
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indicator lamp |
indicator lamp*2, |
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``CVT'' on CON- |
``ENGINE'' on CON- |
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SULT-II |
SULT-II or GST |
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Engine speed signal |
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+ TCM does not receive the proper volt- |
X |
P0725 |
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age signal from the ECM. |
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ENGINE SPEED SIG |
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CVT fluid temperature sensor |
+ TCM receives an excessively low or |
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high voltage from the sensor. |
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P0710 |
BATT/FLUID TEMP |
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SEN |
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CIRC |
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Stepping motor circuit |
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+ Not proper voltage change of the |
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TCM terminal when operating step |
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P1777 |
STEP MOTOR |
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STEP MOTOR/ |
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motor. |
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CIRC |
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Stepping motor function |
+ Step motor is not operating according |
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to the TCM. |
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P1778 |
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FNCTN |
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CVT fluid pressure sensor |
+ TCM receives an excessively low or |
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high voltage from the sensor. |
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P1791 |
LINE PRESSURE |
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LINE PRESS SEN |
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SEN |
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CVT SAFE FUNCTION |
+ TCM is malfunctioning. |
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Ð |
CVT SAFE FUNC- |
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TION |
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TCM (RAM) |
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+ TCM memory (RAM) is malfunction- |
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ing. |
Ð |
Ð |
CONTROL UNIT |
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(RAM) |
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TCM (ROM) |
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+ TCM memory (ROM) is malfunction- |
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ing. |
Ð |
Ð |
CONTROL UNIT |
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(ROM) |
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TCM (EEP ROM) |
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+ TCM memory (EEP ROM) is malfunc- |
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tioning. |
Ð |
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CONT UNIT (EEP |
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ROM) |
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Initial start |
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+ This is not a malfunction message |
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(Whenever shutting off a power sup- |
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*INITIAL START* |
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ply to the TCM, this message appears |
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on the screen.) |
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No failure |
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+ No failure has been detected. |
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(NO SELF DIAGNOSTIC FAILURE INDI- |
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CATED FURTHER TESTING MAY BE |
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REQUIRED**) |
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X: Applicable |
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Ð: Not applicable |
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*1: These malfunctions cannot be displayed by MI 
if another malfunction is assigned to MI.
*2: Refer to EC section [``Malfunction Indicator (MI)'', ``ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION''].
AT-20
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
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CONSULT-II (Cont'd) |
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DATA MONITOR MODE (CVT) |
NCAT0022S04 |
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Monitor item |
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Item |
Display |
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Description |
Remarks |
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TCM input |
Main |
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signals |
signals |
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Vehicle speed sensor |
VHCL SPEED |
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+ Vehicle speed com- |
When racing engine in ``N'' |
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(Secondary speed sensor) |
SE |
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puted from signal of |
or ``P'' position with vehicle |
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[km/h] or [mph] |
X |
Ð |
revolution sensor is dis- |
stationary, CONSULT-II |
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played. |
data may not indicate |
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0 km/h (0 mph). |
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Throttle position sensor |
THRTL POS |
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+ Throttle position sensor |
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SEN |
X |
Ð |
signal voltage is dis- |
Ð |
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[V] |
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played. |
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CVT fluid temperature |
FLUID TEMP |
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+ CVT fluid temperature |
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sensor |
SE |
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sensor signal voltage is |
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[V] |
X |
Ð |
displayed. |
Ð |
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+ Signal voltage lowers |
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as fluid temperature |
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rises. |
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Battery voltage |
BATTERY |
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+ Source voltage of TCM |
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VOLT |
X |
Ð |
is displayed. |
Ð |
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[V] |
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Engine speed |
ENGINE |
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+ Engine speed, com- |
Engine speed display may |
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SPEED |
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puted from engine |
not be accurate under |
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[rpm] |
X |
X |
speed signal, is dis- |
approx. 800 rpm. It may not |
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played. |
indicate 0 rpm even when |
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engine is not running. |
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P/N position switch |
N POSITION |
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+ ON/OFF state com- |
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SW |
X |
Ð |
puted from signal of |
Ð |
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[ON/OFF] |
P/N position SW is dis- |
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played. |
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R position switch |
R POSITION |
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+ ON/OFF state com- |
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SW |
X |
Ð |
puted from signal of R |
Ð |
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[ON/OFF] |
position SW is dis- |
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played. |
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D position switch |
D POSITION |
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+ ON/OFF state com- |
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SW |
X |
Ð |
puted from signal of D |
Ð |
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[ON/OFF] |
position SW is dis- |
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played. |
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Sport mode switch |
S POSITION |
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+ ON/OFF status, com- |
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SW |
X |
Ð |
puted from signal of |
Ð |
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[ON/OFF] |
Sport mode SW, is dis- |
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played. |
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L position switch |
L POSITION |
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+ ON/OFF status, com- |
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SW |
X |
Ð |
puted from signal of L |
Ð |
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[ON/OFF] |
position SW, is dis- |
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played. |
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Closed throttle position |
CLOSED |
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+ ON/OFF status, com- |
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switch |
THL/SW |
X |
Ð |
puted from signal of |
Ð |
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[ON/OFF] |
closed throttle position |
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SW, is displayed. |
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Wide open throttle position |
W/O THRL/ |
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+ ON/OFF status, com- |
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switch |
P-SW |
X |
Ð |
puted from signal of |
Ð |
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[ON/OFF] |
wide open throttle posi- |
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tion SW, is displayed. |
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AT-21
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
CONSULT-II (Cont'd)
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Monitor item |
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Item |
Display |
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Description |
Remarks |
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TCM input |
Main |
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signals |
signals |
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Gear position |
GEAR |
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+ Gear position (when |
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Ð |
X |
use manual mode) data |
Ð |
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used for computation |
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by TCM, is displayed. |
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Selector lever position |
SLCT LVR |
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+ Selector lever position |
+ A specific value used for |
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POSI |
Ð |
X |
data, used for computa- |
control is displayed if fail- |
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tion by TCM, is dis- |
safe is activated due to |
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played. |
error. |
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Vehicle speed |
VEHICLE |
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+ Vehicle speed data, |
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SPEED |
Ð |
X |
used for computation |
Ð |
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[km/h] or [mph] |
|
|
by TCM, is displayed. |
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Throttle position |
THROTTLE |
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+ Throttle position data, |
+ A specific value used for |
|
|
POSI |
Ð |
X |
used for computation |
control is displayed if fail- |
|
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[/8] |
by TCM, is displayed. |
safe is activated due to |
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error. |
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Line pressure duty |
LINE PRES |
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+ Control value of line |
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DTY |
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pressure solenoid |
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[%] |
Ð |
X |
valve, computed by |
Ð |
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TCM from each input |
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signal, is displayed. |
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Torque converter clutch |
TCC S/V DUTY |
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+ Control value of torque |
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solenoid valve duty |
[%] |
|
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converter clutch sole- |
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Ð |
X |
noid valve, computed |
Ð |
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by TCM from each |
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||
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input signal, is dis- |
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played. |
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Self-diagnosis display |
PAT MONI |
|
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+ Control status of |
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lamp |
LAMP |
Ð |
X |
SPORT or CVT indica- |
Ð |
|
(SPORT or CVT indicator |
[ON/OFF] |
tor lamp is displayed. |
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lamp) |
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CVT fluid pressure sensor |
LINE PRES- |
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+ CVT fluid pressure sen- |
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SURE [V] |
X |
Ð |
sor signal voltage is |
Ð |
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displayed. |
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Primary pulley speed |
I/P PULLY SPD |
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+ Primary pulley speed |
|
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sensor |
[rpm] |
X |
X |
computed from signal |
Ð |
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of primary pulley speed |
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sensor is displayed. |
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Secondary pulley speed |
O/P PULLY |
|
|
+ Secondary pulley speed |
|
|
sensor |
SPD [rpm] |
Ð |
Ð |
computed from signal |
Ð |
|
|
|
of secondary speed |
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sensor is displayed. |
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Stop lamp switch |
BRAKE SW |
|
|
+ ON/OFF position signal |
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|
|
[ON/OFF] |
X |
Ð |
of stop lamp switch is |
Ð |
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displayed. |
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|
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Idle judgement |
CLSD THL |
|
|
+ Idle status judged from |
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|
|
POSI [ON/OFF] |
Ð |
Ð |
throttle position sensor |
Ð |
|
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|
|
signal is displayed. |
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ABS signal |
ABS SIGNAL |
|
|
+ ABS operation signal |
|
|
|
[ON/OFF] |
X |
Ð |
(ON/OFF) from ABS |
Ð |
|
|
|
control unit is dis- |
||||
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||
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played. |
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|
|
AT-22
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
|
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|
|
CONSULT-II (Cont'd) |
|
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|
|
Monitor item |
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|
||
Item |
Display |
|
|
Description |
Remarks |
|
TCM input |
Main |
|||||
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|||
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signals |
signals |
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Manual mode switch |
MANU MODE |
|
|
+ ON/OFF position signal |
|
|
|
SW [ON/OFF] |
X |
Ð |
of manual mode switch |
Ð |
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|
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is displayed. |
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Non-manual mode switch |
NON M MODE |
|
|
+ ON/OFF position signal |
|
|
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SW [ON/OFF] |
X |
Ð |
of non-manual mode |
Ð |
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|
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switch is displayed. |
|
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Up switch |
UP SW |
|
|
+ ON/OFF position signal |
|
|
|
[ON/OFF] |
X |
Ð |
of up switch is dis- |
Ð |
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|
|
played. |
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|
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Down switch |
DOWN SW |
|
|
+ ON/OFF position signal |
|
|
|
[ON/OFF] |
X |
Ð |
of down switch is dis- |
Ð |
|
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|
|
played. |
|
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Step motor coil A |
S/M COIL [A] |
|
|
+ Control valve of step |
|
|
|
[ON/OFF] |
|
|
motor coil A, computed |
|
|
|
|
Ð |
Ð |
by TCM from each |
Ð |
|
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|
|
|
input signal is dis- |
|
|
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|
|
played. |
|
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|
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Step motor coil B |
S/M COIL [B] |
|
|
+ Control valve of step |
|
|
|
[ON/OFF] |
|
|
motor coil B, computed |
|
|
|
|
Ð |
Ð |
by TCM from each |
Ð |
|
|
|
|
|
input signal is dis- |
|
|
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|
|
played. |
|
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|
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Step motor coil C |
S/M COIL [C] |
|
|
+ Control valve of step |
|
|
|
[ON/OFF] |
|
|
motor coil C, computed |
|
|
|
|
Ð |
Ð |
by TCM from each |
Ð |
|
|
|
|
|
input signal is dis- |
|
|
|
|
|
|
played. |
|
|
|
|
|
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|
|
Step motor coil D |
S/M COIL [D] |
|
|
+ Control valve of step |
|
|
|
[ON/OFF] |
|
|
motor coil D, computed |
|
|
|
|
Ð |
Ð |
by TCM from each |
Ð |
|
|
|
|
|
input signal is dis- |
|
|
|
|
|
|
played. |
|
|
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|
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|
|
CVT ratio |
CVT RATIO [Ð] |
Ð |
X |
+ Real CVT ratio oper- |
Ð |
|
|
|
ated TCM is displayed. |
||||
|
|
|
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|
||
|
|
|
|
|
|
|
Step |
PLY CONT |
Ð |
X |
+ Step motor position is |
Ð |
|
|
STEP [step] |
displayed. |
||||
|
|
|
|
|||
|
|
|
|
|
|
|
Line pressure |
LINE PRES- |
|
|
+ Real line pressure cal- |
|
|
|
SURE [MPa] |
Ð |
X |
culated from line pres- |
Ð |
|
|
|
sure sensor voltage |
||||
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|
||
|
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|
|
with TCM is displayed. |
|
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Pulley rpm´in 2 |
T RPM [rpm] |
|
|
+ Target primary pulley |
|
|
|
|
Ð |
Ð |
speed operated with |
Ð |
|
|
|
|
|
TCM is displayed. |
|
|
|
|
|
|
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|
|
CVT ratio 2 |
T RATIO [Ð] |
|
|
+ Target changing the |
|
|
|
|
Ð |
Ð |
speed ratio operated |
Ð |
|
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|
|
with TCM is displayed. |
|
|
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|
|
Step 2 |
T STEP [step] |
|
|
+ Target step motor posi- |
|
|
|
|
Ð |
Ð |
tion operated with TCM |
Ð |
|
|
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|
|
is displayed. |
|
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X: Applicable |
|
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Ð: Not applicable |
|
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AT-23
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
CONSULT-II (Cont'd)
Data link connector
WORK SUPPORT MODE WITH CONSULT-II
1.Turn1. ignition switch ``OFF''.
2.Connect CONSULT-II to Data link connector. Data link connector is located in left side dash panel.
3.Turn ignition switch ``ON''.
NRS071
4.Touch ``START''.
SAT586J
5.Touch ``CVT''.
SAT651J
6.Touch ``WORK SUPPORT''.
SAT732J
7.Touch ``ENGINE BRAKE ADJUSTMENT''.
8.Touch ``START''.
SAT933J
AT-24
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
CONSULT-II (Cont'd)
9. Set ``ENGINE BRAKE LEVEL'' by touching ``UP'' or ``DOWN''.
ENGINE BRAKE LEVEL
0:Initial set value (Engine brake level control is activated)
OFF: Engine brake level control is disactivated.
10.Turn ignition switch ``OFF'', wait at least 5 seconds and then turn ignition switch ``ON''.
11.Engine brake level set is completed.
CAUTION:
Mode of ``+1'' ``0'' ``-1'' ``-2'' ``OFF'' can be selected by press- SAT934J ing the ``UP'' ``DOWN'' on CONSULT screen. However, do not select mode other than ``0'' and ``OFF''. If the ``+1'' or ``-1'' or ``-2'' is selected, that might cause the abnormality of drivabil-
ity.
DIAGNOSTIC PROCEDURE WITHOUT CONSULT-II
NCAT0022S07
OBD Self-diagnostic Procedure (With GST)
NCAT0022S0701
Refer to EC section [``Generic Scan Tool (GST)'', ``ON BOARD
DIAGNOSTIC SYSTEM DESCRIPTION''].
OBD Self-diagnostic Procedure (No Tools)
NCAT0022S0702
Refer to EC section [``Malfunction Indicator (MI)'', ``ON BOARD
DIAGNOSTIC SYSTEM DESCRIPTION''].
Rod |
Throttle |
|
|
TCM Self-diagnostic Procedure (No Tools) |
|
|
|
=NCAT0022S0703 |
|
|
opener |
|
Preparation |
|
|
|
|
1. |
Turn ignition switch to ``OFF'' position. |
|
|
|
2. |
Connect the handy type vacuum pump to the throttle opener |
|
|
|
|
and apply vacuum −25.3 kPa (−190 mmHg, −7.48 inHg). |
|
|
|
3. |
Disconnect the throttle position switch harness connector. |
|
|
|
4. |
Turn ignition switch to ``ON'' position. |
|
Vacuum |
|
5. |
Check continuity of the closed throttle position switch. |
|
pump |
|
|
Continuity should exist. |
Accelerator drum |
|
SAT491J |
|
(If continuity does not exist, check throttle opener and |
|
|
closed throttle position switch. Then increase vacuum |
||
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until closed throttle position switch shows continuity.) |
6.Connect the throttle position switch harness connector.
7.Warm up the engine.
8.Turn the ignition switch from ON to OFF two more times, and then turn to OFF.
9.In the ``P'' position of the selector lever, turn the ignition switch ON, and verify that the CVT warning lamp turns on for about 2 seconds.
10.Turn the ignition switch OFF.
11.Press the brake pedal, and shift the selector lever to the ``D'' position.
12.Turn the ignition switch ON.
13.Release the brake, and shift the selector lever to the ``L'' position.
14.Fully depress both brake and accelerator pedals all the way to the floor. Without releasing the brake and accelerator pedals, shift the selector lever to the ``D'' position.
15.Read the display from the CVT warning lamp to complete the diagnosis.
AT-25
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
CONSULT-II (Cont'd)
Judgement of Self-diagnosis Code
NCAT0022S0704
CVT or SPORT indicator lamp*
All judgement flickers are the same. |
1st judgement flicker is longer than others. |
Self diagnosis |
|
start |
|
Start signal 10 judgement flickers |
|
Light |
|
|
Light |
Shade |
|
|
Shade |
SAT436FA |
SAT437FA |
All circuits that can be confirmed by self-diagnosis are OK. |
Secondary speed sensor (VEHICLE SPEED SENSOR CVT) cir- |
|
cuit is short-circuited or disconnected. |
|
Þ Go to VEHICLE SPEED SENSOR CVT (SECONDARY |
|
SPEED SENSOR) (DTC: 0720), AT-62. |
|
|
2nd judgement flicker is longer than others. |
3rd judgement flicker is longer than others. |
|
Light |
Light |
|
|
Shade |
Shade |
|
SAT439FA |
SAT441FA |
Primary speed sensor circuit is short-circuited or disconnected. |
Throttle position sensor circuit is short-circuited or disconnected. |
Þ Go to PRIMARY SPEED SENSOR (DTC: 0715), AT-59. |
Þ Go to THROTTLE POSITION SENSOR (DTC: 1705), AT-79. |
|
|
4th judgement flicker is longer than others. |
5th judgement flicker is longer than others. |
Self diagnosis |
|
start |
Light |
|
|
Light |
|
|
Shade |
Shade |
|
SAT443FA |
SAT445FA |
Step motor circuit is short-circuited or disconnected. |
CVT fluid pressure sensor circuit is short-circuited or discon- |
Þ Go to STEP MOTOR (DTC: 1777), AT-86 . |
nected. |
|
Þ Go to CVT FLUID PRESSURE SENSOR (DTC: 1791), AT-94. |
AT-26
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
CONSULT-II (Cont'd)
CVT or SPORT indicator lamp*
6th judgement flicker is longer than others. |
7th judgement flicker is longer than others. |
Light |
Light |
|
|
Shade |
Shade |
|
|
SAT447FA |
SAT449FA |
Line pressure solenoid valve circuit is short-circuited or discon- |
Lock up solenoid valve circuit is short-circuited or disconnected. |
nected. |
Þ Go to TORQUE CONVERTER CLUTCH SOLENOID VALVE |
Þ Go to LINE PRESSURE SOLENOID VALVE (DTC: 0745), |
(DTC: 0740), AT-69. |
AT-74. |
|
|
|
8th judgement flicker is longer than others. |
9th judgement flicker is longer than others. |
Self diagnosis |
|
start |
|
Light |
Light |
|
|
Shade |
Shade |
|
|
SAT451FA |
SAT453FA |
CVT fluid temperature sensor is disconnected or TCM power |
Engine speed signal circuit is short-circuited or disconnected. |
source circuit is damaged. |
Þ Go to ENGINE SPEED SIGNAL (DTC: 0725), AT-66. |
Þ Go to CVT FLUID TEMPERATURE SENSOR (DTC: 0710) |
|
AND TCM POWER SOURCE, AT-54. |
|
|
|
10th judgement flicker is longer than others. |
Flickers as shown below. |
Light |
Light |
|
|
Shade |
Shade |
|
|
SAT455FA |
SAT457FA |
+When ``4th judgement flicker'' and/or ``6th judgement flicker'' is Battery voltage is low.
displayed, inspect ``STEP MOTOR (DTC: 1777)'' and/or ``LINE Battery has been disconnected for a long time.
PRESSURE SOLENOID VALVE (DTC: 0745)''. |
Battery is connected conversely. |
+ When neither ``4th judgement flicker'' nor ``6th judgement |
(When reconnecting TCM connectors Ð This is not a problem) |
flicker'' are displayed, replace TCM. |
|
Þ Go to CVT SAFE FUNCTION, AT-99. |
|
AT-27
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
CONSULT-II (Cont'd)
CVT or SPORT indicator lamp*
Lamp does not come on.
Self diagnosis start
Light
Shade
SAT653J
PNP switch, stop lamp switch or throttle position switch circuit is disconnected or TCM is damaged.
Þ Go to TROUBLE DIAGNOSIS FOR NON-DETECTABLE
ITEMS, AT-105.
t1 = 2.5 seconds t2 = 2.0 seconds t3 = 1.0 second t4 = 1.0 second *CVT indicator lamp: Hyper CVT M6
SPORT indicator lamp: Hyper CVT
AT-28
TROUBLE DIAGNOSIS Ð INTRODUCTION
|
|
|
Introduction |
||
|
|
|
|
|
|
|
|
Introduction |
NCAT0023 |
||
|
|
||||
Sensors |
|
The TCM receives a signal from the vehicle speed sensor, throttle |
|||
|
|
position sensor or PNP switch and provides shift control or lock-up |
|||
TCM |
ECM |
control via step motor and CVT solenoid valves. |
|
|
|
The TCM also communicates with the ECM by means of a signal |
|||||
|
|
||||
|
|
sent from sensing elements used with the OBD-related parts of the |
|||
|
|
CVT system for malfunction-diagnostic purposes. The TCM is |
|||
|
|
capable of diagnosing malfunctioning parts while the ECM can |
|||
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store malfunctions in its memory. |
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Input and output signals must always be correct and stable in the |
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Solenoid valves |
SAT631IA |
operation of the CVT system. The CVT system must be in good |
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operating condition and be free of valve seizure, solenoid valve |
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malfunction, etc. |
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It is much more difficult to diagnose a problem that occurs intermit- |
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INFO. |
CAUSE |
tently rather than continuously. Most intermittent |
problems are |
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caused by poor electric connections or improper wiring. In this |
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case, careful checking of suspected circuits may help prevent the |
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replacement of good parts. |
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A visual check only may not find the cause of the problems. A road |
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test with CONSULT-II (or GST) or a circuit tester connected should |
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be performed. Follow the ``Work Flow''. Refer to AT-32. |
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Before undertaking actual checks, take a few minutes to talk with |
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SAT632I |
a customer who approaches with a driveability complaint. The cus- |
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tomer can supply good information about such problems, espe- |
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cially intermittent ones. Find out what symptoms are present and |
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under what conditions they occur. A ``Diagnostic Worksheet'' like |
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the example (AT-31) should be used. |
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Start your diagnosis by looking for ``conventional'' problems first. |
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This will help troubleshoot driveability problems on an electronically |
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controlled engine vehicle. |
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Also check related Service bulletins for information. |
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SEF234G
AT-29
TROUBLE DIAGNOSIS Ð INTRODUCTION
Introduction (Cont'd)
DIAGNOSTIC WORKSHEET
=NCAT0023S01
Information from Customer
NCAT0023S0101
KEY POINTS
WHAT ..... Vehicle & CVT model WHEN..... Date, Frequencies WHERE..... Road conditions
HOW..... Operating conditions, Symptoms
Customer name MR/MS |
Model & Year |
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VIN |
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Trans. model |
Engine |
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Mileage |
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Incident Date |
Manuf. Date |
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In Service Date |
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Frequency |
© Continuous © Intermittent ( |
times a day) |
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© Vehicle does not move. ( © Any position © Particular position) |
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Symptoms |
© Lockup malfunction |
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© Shift point too high or too low. |
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© Shift shock or slip ( © N → D |
© Lockup © Any drive position) |
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© Noise or vibration |
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© No pattern select |
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© Others |
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( |
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) |
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SPORT indicator lamp or CVT |
Blinks for about 8 seconds. |
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indicator (warning) lamp |
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© Continuously lit |
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© Not lit |
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Malfunction indicator (MI) |
© Continuously lit |
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© Not lit |
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AT-30
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