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I |
NISSAN
MODEL R 3 4 SERIES
FOREWORD
This Sewice Manual contains information concerning necessary service procedures and relevant data for the model R34 series.
All information, illustrations and specifications contained in this Service Manual are based on the latest product information available at the time of publication. If your NISSAN model differs from the specifications contained in this Sewice Manual, consult your NISSAN distributor for information.
The right is resewed to make changes in specifications and methods at any time without notice.
01998 KISSAN MOTOR CO., LTD. Printed in Japan
A11 rights reserved. No part of this Service Manual may be reproduced or stored in a retrieval system, or transmitted in any form, or by any means, electronic, mechanical, photocopying, recording or otherwise, without the prior written permission of Nissan Motor Company Ltd.. Tokyo, Japan.
HOW TO USE THIS MANUAL
bThis Service Manual only contains the service data specifications and trouble diagnosis information such as self-diagnosis, CONSULT, circuit diagram and so on.
bFor other information not specified in this manual, refer to Japanese version Service Manual (Pub. No. A006029) and wiring diagram manual (Pub. No. WD8EOR34JO).
IMPORTANT SAFETY NOTICE
The proper performance of service is essential for both the safety of the technician and the efficient functioning of the vehicle.
The service methods in this Service Manual are described in such a manner that the service may be performed safely and accurately.
Service varies with the procedures used, the skills of the technician and the tools and parts available. Accordingly, anyone using service procedures, took or parts which are not specifically recommended by NISSAN must first be completely satisfied that neither personal safety nor the vehicle'ssafety will be jeopardized by the service method selected.
GENERAL INFORMATION
SECTION GI
CONTENTS
CONSULT CHECKING SYSTEM .................................... |
2 |
IDENTIFICATION INFORMATION................................... |
3 |
Function and System Application ................................ |
2 |
Model Variation............................................................ |
3 |
Lithium Battery Replacement ...................................... |
2 |
Vehicle Identification Number...................................... |
4 |
Checking Equipment.................................................... |
2 |
Vehicle Identification Plate........................................... |
4 |
CONSULT CHECKING SYSTEM
Function and System Application
Diagnostic
test mode
Work support
Self-diagnostic
results
Trouble diagnostic record
Function |
ENGINE |
AfT |
Air bag |
ABS |
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This mode enables a technician to adjust some devices faster |
x |
- |
- |
- |
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and more accurately by following the indications on CONSULT. |
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Self-diagnostic results can be read and erased quickly. |
x |
x |
x |
x |
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Current self-diagnostic results and all trouble diagnostic records |
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- |
X |
- |
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previously stored can be read. |
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- |
-- |
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ECU discriminated No.
Data monitor
Active test
Classification number of a replacement ECU can be read to pre- |
- |
- |
X |
- |
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vent an incorrect ECU from being installed. |
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- |
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InputIOutput data in the ECM can be read. |
x |
x |
x |
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Diagnostic Test Mode in which CONSULT drives some actuators |
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- |
- |
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apart from the ECMs and also shifts some parameters in a |
x |
x |
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specified range. |
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ECM part number
IL Function test x: Applicable
ECM part number can be read. |
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x |
x |
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- |
x |
Conducted by CONSULT instead of a technician to determine |
l |
x |
H |
- |
1 |
- |
Iwhether each system is "OK" or 'NG". |
Lithium Battery Replacement
CONSULT contains a lithium battery. When replacing the battery obey the following:
WARNING:
Replace the lithium battery with SANYO Electric Co., Ltd., CR2032 only. Use of another battery may present a risk of fire or explosion. The battery may present a fire or chemical burn hazard if mistreated. Do not recharge, disassemble or dispose of in fire.
Keep the battery out of reach of children and discard used battery conforming to the local regulations.
Checking Equipment
When ordering the below equipment, contact your NlSSAN distributor.
!
Tool name |
Description |
NISSAN CONSULT
@CONSULT unit and accessories
@Program card UE990: For Automatic
transmission of Dual rnatic M-ATx
EE980: Except for Automatic transmission of Dual matic M-Atx
IDENTIFICATION INFORMATION
Model Variation
Body |
Grade |
Model |
Engine |
Transmission |
Rear differential carrier |
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RH drive |
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2-door |
25GT TURBO |
GGKBRTFR34UDA |
RB25DET |
FS5R30A |
. R200V |
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GGKBRTAR34UDA |
RE4RO1B |
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GGHAREARMEDA |
RB20DE |
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1RB25DE |
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1GGKAREFRMEDA |
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GGKAREARMEDA |
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25GT TURBO |
GGKBRTFRMUDA |
RB25DET |
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R200V |
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GGKBRTARMUDA |
RE4RO1B |
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20GT |
BGHAREFR34EDA |
RB20DE |
FS5W71C |
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BGHAREARMEDA |
RE4RO1B |
R200 |
i% |
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I |
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25GT TURBO |
BGKBRTFR34UDA |
RB25DET |
FS5R30A |
R200V |
$#i |
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BGKBRTAR34UDA |
RE4RO1B |
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Prefix and suffix designations: |
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- 1 |
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A: Standard |
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TEG,TDestlon'U: intercooler turbocharger |
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Model |
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F: &speed manual transmission |
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A: 4-speed automatic transmission |
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20GT, 25GT, 25GT-X |
T: 25GT TURBO |
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k: Right-hand drive |
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2WD |
B: 2WD + ELECTRIC SUPER HlCAS |
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GH: RB20DE |
GK: RB25DE, RB25DET |
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4-door Sedan G: 2-door Coupe |
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- 2 L .I
Vehicle identification plate
--
IDENTIFICATION INFORMATION
Vehicle Identification Number
The stamping position for vehicle identification number is at the right side of cowl top panel.
GF-HR34: From HR34-000001
GF-ER34: From ER34-000001 GF-ENR34: From ENR34-000001
Vehicle Identification Plate
---
NISSAN MOTOR CO,LTD.JAPAN
CHASSlS NO |
A |
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YO DE CHASSIS |
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MOOEL |
A |
I |
WDELO |
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n7- me4 W |
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0 |
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~YLCOLOAWUIWQW( A A |
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z; ENGINE |
Q A |
cc |
2 ; Mom |
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2 I ;mi TRANS AXLE |
A & |
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T77.b TRANS EJE |
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PLANT n r w r r
A
A
A A A
A
A
A
T Y P ~
Chassis No.
Model
~ o d ycolor
Inner trim color
Engine type Displacement Transmission type
Transaxle type
ENGINE CONTROL SYSTEM
SECTION EC
CONTENTS
ENGINE AND EMISSION CONTROL OVERALL |
|
Fail-safe and Backup Functions............................... |
15 |
RS |
SYSTEM...........................................................................2 |
Self-diagnosis .......................................................... |
16 |
MA |
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System Description...................................................... |
2 |
CONSULT.................................................................. |
I 9 |
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Description of Engine Control...................................... |
2 |
Symptom Matrix Chart............................................... |
28 |
|
System Diagram.......................................................... |
3 |
Idle Speed Inspection and Adjustment..................... |
;35 |
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Component Parts Location.......................................... |
6 |
IgnitionTiming Inspectionand Adjustment................ |
36 |
|
Vacuum Hose Drawing................................................ |
8 |
AirIFuel Ratio Inspection........................................... |
37 |
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Circuit Diagram........................................................ |
11 |
Fuel Pressure Inspection........................................... |
38 |
9D |
ECM (.EM) Terminal Layout.................................... |
13 |
ECM (.TCM) InpuVOutputSignal Reference |
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TROUBLE DIAGNOSES ............................................... |
15 |
Value ......................................................................... |
.39 |
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ENGINE AND EMISSION CONTROL OVERALL SYSTEM
A 1 System Description
The engine control system, which performs various controls such as the fuel injection control and ignition timing control with a single control unit, has been adopted.
Diagnostic system applicable to CONSULT has been adopted for easier inspection, service, and trouble diagnostic operations.
Fuel injection control
Ignitiontiming control
Idle speed control
Fuelpump drive
Description of Engine Control
I
Description
\ |
, |
Performs optimum fuel injectionfor every operation condition for |
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improved exhaust performance and response. |
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Adopts SOFlS (Sophisticated and Optimized Fuel Injection System) |
0 |
control for optimized fuel injection. |
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Adopts airbuel ratio feedback learning control that performs com- |
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pensationof airfiuel ratio for improved drivability when the system is |
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in a transitional condiiion due to sudden change in airfiuel ratro. |
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Uses an ignition timing map stored in the control unit to perform |
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controls so that the optimum ignition timing is obtained for every |
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operating condition. |
0 |
Performs knock control, in which the ignition timing is advancedl |
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retarded according to the presence of knocking, so that the opti- |
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mum i nition timing is obtained for every operating condition and |
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type oPfue1. |
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Performs feedback control to obtain the target idle speed for various |
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conditions, such as during warm-up or when the air conditioner is |
O |
actuated, via the AAC valve that adjusts the intake air amount when |
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the throttle valve is fully closed. |
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Turns the fuel pump relay OWOFF according to the engine speed |
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signal. |
O |
In RB25DET model, FPCM (Fuel Pump Control Modulatoi) control |
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has been adopted for reduced idle noise. |
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Heated oxygen sensor |
Promotes warm-up of the heated oxygen sensor for improved air1 |
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heater control |
fuel ratio feedback function. |
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Air conditioner cut control |
Tums the air conditioner relay OFF at starting or during acceleration |
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to reduce the engine load. |
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-- |
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Auxiliary electric fan control
Engine, M,TCS,ABS integrated control
- -
Variable valve timing control
Canister purge control
Tums the auxiliary electric fan relay ONIOFF according to the engine coolant temperature signal and air conditioner signal.
Reduces engine toque during gearshift or when TCS (Traction Control System) is being operated via a multiplex communication
lino
According to the engine speed and load, controls the cam phase by I hydraulic pressure to change intake valve open/close timing for Increased engine torque at low and middle speeds and for
enhanced out~ut.
I
Performs duty control of the canister purge air according to various
ooeratina conditions.
- r - ~ e - - - - - -
air intake valve |
Controls the intake air passage in the intake manifold collector to |
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increase engine torque at low and middle speeds and to enhance |
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control |
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output. |
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According to operation conditions, turns the air jet swirl control sole- |
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Air jet swirl control |
noid valve ONIOFF to openlclose the air jet swirl control valve for |
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stable combustion. |
pressure control
Fail-safe and backup controls
Diagnostic system
Tums the Turbo pressure control solenoid valve ONIOFF according to operation conditions.
Ensures the vehicle'ssafe operation and enables the vehicle to be driven in an emergency when any of the system major components (microcomputer in the control unit, engine coolant temperature sensor, etc.) fails.
For easier trouble diagnosis, self-diagnostic system is adopted and the existing diagnostic system is modifiedso that CONSULT can be used.
0
0
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0
o
0
0
0
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0
0
ENGINE AND EMISSION CONTROL OVERALL SYSTEM
System Diagram
RB20DE (UB)
|
a |
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5 |
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- |
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a |
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w |
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2 |
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LL |
Malfunction indicator lamp |
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Fuel pump control signal |
- Vehicle speed signal |
Parwneutralposition switch signal |
- |
C |
5 |
Vehicle speed signal -! |
- |
c
!!
I-
ENGINE AND EMISSION CONTROL OVERALL SYSTEM
System Diagram (Cont'd)
a
E
-a
al
1
U.
Malfunction indicator lamp
Fuel pump control signal ParWneutral position switch signal -
Vehicle speed signal Crankshaft position sensor signal -D
Air conditioner switch signal *
~ n g i n ecoolant temperature sensor signal *
Ignition timing control signal Auxiliary air control signal
|
Refrigerant pressure sensor signal + |
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Power steering oil pressure switch signal |
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- Variable valve timing control sign |
I |
Variable air intake control |
solenoid valve control sig |
|
I |
+
1
4
2
Y
4
-
aC
-
- -
m
c
.0,-
"Y
-B
C
-C P
-0,
-ID
2 s
2
F
ENGINE AND EMISSION CONTROL OVERALL SYSTEM
System Diagram (Cont'd)
|
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Resistor |
a |
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I |
I |
1 |
w |
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I |
~ |
I |
C |
L L O E |
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Malfunction indicator lamo |
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I |
Fuel D U ~ Dcontrol sional |
I |
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Parklneutral position switch s i g n a n |
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Air conditioner switch signal |
s |
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Crankshaft position sensor signal |
- |
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- |
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- |
Engine coolant temperature sensor signalC |
0 |
||
k |
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,- |
Ignition timing control signal |
|
r |
Airlfuel ratio control signal- |
U |
||
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W |
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Variable valve timing control s~anal
|
I |
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Vehicle soeed sianal |
|
I |
- |
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Refrigerant pressure sensor sianal |
||
rr |
Power steering oil pressure switch signal |
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- |
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Heated oxygen sensor output signal |
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Mass air flow sensor signal |
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I |
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Knock sensor output signal |
ITurbo pressure signal Auxiliarv air amount control
signal
2 L r
gE 8E z$,
Air regulator
LT
Turbo pressure sensor
ENGINE AND EMISSION CONTROL OVERALL SYSTEM
Component Parts Location
RB20DE (UB), RB25DE
Component name
|
I Fuel iniector |
|
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IFuel pump |
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AAC valve |
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IAA unit |
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Air reaulator |
|
5 |
Ignitioncoil |
|
' |
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m |
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3 Canister purge control valve |
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Variable valve tirnina control solenoid valve |
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variable intake control solenoid valve |
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Variable air intake control actuator |
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Air jet swirl solenoid valve [RBPODE (UB)] |
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Air jet swirl actuator [RB20DE (LIB)] |
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Crankshaft position sensor |
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Ring gear crankshaft position sensor [RB20DE (UB)] |
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Mass air flow sensor |
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(? |
Throttle position sensor [Incorporates throttle valve |
|
o |
switch ( A l l models only)] |
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C |
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w |
Engine coolant temperature sensor |
|
v, |
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Heated oxygen sensor
Knock sensor
Power steering oil pressure switch
Vehicle speed sensor
ECM (.TCM)
ECM & IGN coil relay
I |
Type |
IHiah-resistance |
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IElectric, turbine |
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Solenoid valve (Duty control)
Wax
Micro-mold (Built into power transistor)
Solenoid valve (Duty control) Solenoid valve (ON-OFFcontrol) Solenoid valve (ON-OFF control) Diaphragm
Solenoid valve (ON-OFF control) Diaphragm
Photoelectric (Directly driven by camshaft)
Magnetic
Hot wire
Variable resistance
Thermistor
Zirconia (with heater)
Piezoelectric
ON-OFF switch
Electromagnetic power generation
104-pin digital control
Small universal relay (2M)
I |
Location |
IFuel tube
IRight rear of luggage compartment (in fuel tank)
Intake manifold collector (Upper)
Cylinder head (Top of each spark plug) Upper part of rocker cover
Front end of cylinder head
Upper part of rocker cover
Intake manifold collector
Lower part of intake manifold
Left front of cylinder head
Clutch housing or converter housing Air cleaner
Throttle chamber
Water outlet
Exhaust manifold
Cylinder block
Rear of radiator lower hose
Transmission
Passenger dashboard side
Passenger dashboard side
Behind ECM (.TCM)
ENGINE AND EMISSION CONTROL OVERALL SYSTEM
Component Parts Location (Cont'd)
|
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" |
. . ., |
. . 7 |
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Comoonent name |
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Fuel injector |
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Fuel pump |
IAAC valve |
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-51 |
I |
unit |
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I Air reoulator" |
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S |
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4 |
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Ignition coil |
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I Canister purge control valve |
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Variable valve timing control solenold valve |
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Turbo pressure control solenoid valve |
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Crankshaft position sensor |
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Mass air flow sensor |
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Throttle position sensor [Incorporates throttle valve |
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switch (AlT model only)] |
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09 |
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Throttle motor sensor |
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5 Enginecoolant temperature sensor
V)
Heatedoxygensensor
Knock sensor
Turbo pressure sensor
Power steering oil pressure switch
( Vehicle speed sensor ECM (.TCM)
Fuel pump control modulator (FPCM)
1 ECM L IGNco~lrelay
P
I |
TVLEa r |
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High-resistance |
|
Electriclturbine |
ISolenoid valve (Duty control) 1 wax. - .
IMicro-mold (Built into power transistor)
ISolenoid valve (Dutv control)
I ---- -
Solenold valve (ONtOFF control)
I Solenoid valve (OMOFF control)
Photoelectric (Directly driven by camshaft)
Hot wire
Variable resistance
Variable resistance
Thermistor
Zirconia (with heater)
Piezoelectric
Silicone diaphragm
ONJOFF switch
Electromagnetic power generation 104-pin digital control
Voltage control
Small un~versalrelay (2M)
.
Fuel tube
Right rear of luggage compartment (in fuel tank)
Intake manifold collector
Cvlinder head UODof each soark olua) Upper part of rocker cover
Front end of cylinder head
Next to left strut tower
Left front end of cylinder head
Air cleaner
Throttle chamber
Water outlet
Turbocharaer exhaust outlet
Cylinder block
Upper part of rocker cover
Rear of radiator lower hose
Transmission
Passenger dashboard side
Left rear of luaaaae comoartment
--
Passenger dashboard s~de ECM ( TCM)
t
ENGINE AND E.MISSIONCONTROL OVERALL SYSTEM
Vacuum Hose Drawing
RB20DE (UB)
1.Intake manifold collector to Pressure regulator
2.Intake manifold collector to Vacuum tank
3.Variable air intake control solenoid valve to Three-way connector
4.Air jet swirl control solenoid valve to Three-way connector
5.Variable air intake control solenoid valve to Variable air intake control actuator
6.lntake manifold collector to Fuel damper
7.Vacuum pipe to Three-way connector
8.Canister purge control valve to Vacuum gallery
9.Canister purge control valve to Throttle chamber
10.Canister to Vacuum gallery
11.Air cleaner case to Vacuum gallery
12.Vacuum tank to Three-way connector
13.Air jet swirl control solenoid valve to Three-way connector
14.Air jet swirl control solenoid valve to Air jet swirl actuator
15.Power steering air valve to Vacuum pipe
16.Power steering air valve to Air duct
17.Air jet swirl assembly to Vacuum pipe
18. Vacuum pipe to Vacuum pipe |
; |
|
A
ENGINE AND EMISSION CONTROL OVERALL SYSTEM
Vacuum Hose Drawing (Cont'd)
RB25DE
Power steering air valve |
+Vacuum tank |
--P Vacuum tank |
lntake manifold collector
ECL178OD
1.lntake manifold collector to Pressure regulator
2.lntake manifold collector to Vacuum tank
3.Variable air intake control solenoid valve to Vacuum tank
4.lntake manifold collector to Fuel damper
5.Variable air intake control solenoid valve to Vacuum pipe
6.Canister to Vacuum gallery
7.Air cleaner case to Vacuum gallery
8.Canister purge control valve to Vacuum gallery
9.Canister purge control valve to Throttle chamber
10.Variable air intake control solenoid valve to Variable air intake control actuator
11.Power steering air valve to Vacuum pipe
12.Power steering air valve to Air duct
13.Vacuum pipe to Vacuum pipe
14.AAC valve to Vacuum pipe
ENGINE AND EMISSION CONTROL OVERALL SYSTEM
Vacuum Hose Drawing (Cont'd)
Canister purge control vzlve
1.lntake manifold collector to Recirculation valve
2.One-way valve to lntake manifold collector
3.Canister purge control valve to One-way valve
4.Canister purge control valve to Vacuum pipe
5.Turbo pressure sensor to Vacuum tank
6.Turbo pressure control solenoid valve.to Air tube
7. Turbo pressure control solenoid valve to Three-way connector
8.Air inlet tube to Three-way connector
9.Swing valve controller to Three-way connector
Canister to Vacuum pipe
Pressure regulator to lntake manifold collector Fuel damper to lntake manifold collector lntake manifold collector to Vacuum pipe Vacuum pipe to Vacuum pipe
Power steering air valve to Vacuum pipe Power steering air valve to Air inlet hose Air inlet pipe to Vacuum tank
ENGINE AND EMISSION CONTROL OVERALL SYSTEM
Circuit Diagram
RB20DE (UB).MTT, RB25DE, RB25DET.MTT MODELS
|
Fan motor |
Auxtliary electric Ian relay |
|
- |
43 |
|
Alr cmdll~onercompressor |
Arr conduoner relay |
|
|
14 |
Y
Engine W a n t temwrature sensor B.
Check c o n n m r
Tachometer drive signal
Mallunct~onindcator lamp
A |
17 |
|
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|
26 |
|
$7 |
= |
Power steenng 011 |
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pressure sw~icr. |
|
I |
|
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23 |
/ |
To rear defogger relay |
|
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[ R B 2 M W D |
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TO starter motor *'""L'*" |
- |
> TO PNP switch |
|
|
I |
[Except lor |
TO Starter relay |
- |
|
|
' |
|
||
RB25DE.4WDI
ENGINE AND EMISSION CONTROL OVERALL SYSTEM
Circuit Diagram (Cont'd)
RB2ODE (UB).A/T, RB25DET.AfT MODELS
. .
..,,-.-....,.
59 : A Turbine
a t-.. sensor A
Overrun clutzh
.shdt ~ l e n w dvalve k pressure detection switch
I' Sh:H control unit
Droppins revstor |
8 18 9 ' S 10 |
-
T
" . - - |
- , |
|
|
TC rear de'oggerrelay 4 |
4 9 |
|
|
176 |
ENGINE AND EMISSION CONTROL OVERALL SYSTEM
ECM (-TCM) Terminal Layout
I |
GY |
CH~'GN-(Data link connector for CONSULT) |
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Terminal |
|
Description |
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Terminal |
Description |
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NO. |
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1 |
1 |
N o I |
||
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1 |
I lgnition signal (Power transistor drrve signal) Cyl. No. 1 |
1 |
|
2 |
1Ignition signal (Power transistor drive signal) Cyl. No. 5 |
1 |
|
3 |
1Ignition signal (Power transistor drive signal) Cyl. No. 3 |
1 |
|
4 |
IECM 6 IGN coil relay control signal |
1 |
|
5 |
|||
Tachometer drive signal |
|
||
6 |
- |
|
|
7 |
Ignition signal (Power transistor drive signal) Cyl. No. 6 |
( |
|
8 |
( Ignitionsignal (Power transistor drive signal) Cyl. No. 2 |
||
9 |
Ignition signal (Power transistor drive signal) Cyl. No. 4 |
|
|
10 |
- |
|
|
11 |
( AAC valve control signal |
( |
|
12 |
- |
|
13Fuel pump relay control signal
14Air conditioner relay control signal
15 |
- |
16 |
- |
17 |
Malfunction indicator lamp |
18 |
- |
19 |
- |
20Ignition switch (START) signal
21Air conditioner switch signal
22 (CHK) |
Check (Diagnosisstart) |
23 |
Throttle position sensor signal |
24 (IGN) |
Ignitionswitch (IGN) signal |
25Control unit ground
26Power steering oil pressure switch signal
27 |
- |
281SB (select bit) 1 signal [RB25DET.A/Tl
291Vehicle speed sensor signal (Vehicle speed sensor 2)
30Headlamp switch signal
31Ignition power supply
32 Control unit ground
'33 Idle position switch signal
--
'34 Iu1"positron switch signal
------
'35 1''2"posifion switch signal
|
1 |
- |
- |
- |
|
|
|
36 |
|
|
|
|
|
||
|
1 |
Throttle opening signal |
|
|
|
|
|
37 |
[RB25DE.4WD,M/TSRB25DE.m RB25DEll |
|
|
||||
'38 |
|
"D" position switch signal |
|
|
|
|
|
39 |
|
Neutral signal (Parklneutralposition switch) |
|
|
|||
'40 |
|
"R" position switch signal |
|
|
|
|
|
|
|
- - - |
|
-- - |
- |
- |
- |
'41 |
1f-k swltch signal |
|
- |
|
|
|
|
42 |
|
- |
|
|
|
|
|
43Sensor around
441Crankshaft position sensor 120'(REF) signal
45Crankshaft position sensor 120" (REF) signal
46Crankshaft position sensor 1" (POS) signal
47Ring gear crankshaft position sensor signal [RB20DE (UB)] Turbo pressure sensor signal LRB25DEl-J
48
Power supply for throttle position sensor, refrigerantpressure sensor, and turbo pressure sensor
49Rear defogger switch signal
50Heated oxygen sensor signal
51Throttle motor sensor signal [RB25DET]
52SB (select bit) 2 signal (RB25DET.ATJ
53Motor throttle switch signal [RB25DET]
54Mass air flow sensor signal
55Mass air flow sensor ground
56Engine coolant temperature sensor signal
57Refrigerant pressure sensor signal
'58 Output shaft rotation sensor signal (Vehicle speed sensor 1) 59 Turbine sensor signal [RB25DET.AlTj
'60 Oil temperature sensor signal
61
62Knock sensor signal 1
63Knock sensor signal 2
64PJT mode switch signal (POWER) [RB20DE (UB).A/Tl
65DB (data bush) 1 signal [RB25DET.W
66DB (data bush) 3 signal [RB25DET.W
Symbols in ( ) next to terminal numbers indicate the data link connector terminals. Items marked with
are available on RB20DE
(UB) and RB25DET.mmodels only.
ENGINE AND EMISSION CONTROL OVERALL SYSTEM
ECM (-TCM)Terminal Layout (Cont'd)
Terminal |
Description |
|
No. |
||
|
||
67 |
Control unit power supply |
|
'68 |
O/D OFF indicator lamp |
69DB (data bush) 2 signal [RB25DET.AIT]
70A K mode switch signal (SNOW) [RB20DE (UB).AIT]
'71 Stop lamp switch signal
72 |
Control unit power |
73 |
- |
101 |
lnjector No. 1 cylinder drive signal |
102 |
- |
103 |
Injector No. 3 cylinder drive signal |
|
Variable air intake control solenoid valve control sianal |
|
- |
|
[RB~ODE(LIB), BR25DEl |
104 |
1Turbo oressure control solenoid valve control signal |
|
[ R B ~ ~ D E T ] |
105 |
Injector No. 2 cylinder drive signal |
'106 |
Line pressure solenoid valve control signal |
107 |
Air jet swirl control solenoid valve control signal [RB20DE (U |
,\I |
|
|
"11 |
Terminal |
|
Description |
|
No. |
|
||
|
- |
||
74 |
|
||
75 (RX) |
Receive (Data input to control unit) |
||
76 (TX) |
Transmit (Data output from control unit) |
||
7 7 |
I |
- |
|
78 |
Auxiliary electric fan relay control signal [RB25DE, RB25DElJ |
||
79 |
ECM.TCM. TCSIABS integrated control signal [Multiplex com- |
||
munication]. [RB25DENT.. |
RB25DEl |
||
1 |
|||
I |
|
||
80 |
Battery power supply |
|
|
|
Line pressure solenoid valve control signal (Dropping resistor |
||
"I3 circuit) |
|
||
114 |
Injector No. 4 cylinder drive signal |
||
'115 |
Overrun clutch solenoid valve control signal |
||
I I16 |
Ilnjector ground |
|
|
117 |
Variable timing control solenoid valve control signal |
||
118 |
Heated oxygen sensor heater control signal |
||
.119 |
Power indicator lamp |
|
|
108 Canister purge control valve control signal
Control unit power supply (Counter-electromotive current log
feedback circuit)
110Injector No. 5 cylinder drive signal
111Fuel pump terminal voltage control output signal [RB25DET]
112Injector No. 6 cylinder drive signal
'120 Lockup solenoid valve control signal
'121 Shift solenoid valve A control signal
I
'122 Shift solenoid valve B control signal 123 -
124 Injector ground
Symbols in ( ) next to terminal numbersindicatethe data link connector terminals. Itemsmarkedwith 'are available on RB20DE (UB) and R825DET.All models only.
TROUBLE DIAGNOSES
---- -- -- - -
Fail-safe and Backup Functions
0The fail-safe function estimates the opening conditions with other input signals and selects safer conditions for the engine (vehicle) control, based on the data previously stored in the control unit, when any of the critical sensors in the ECM fails.
The backup function allows the vehicle to be driven, using control signals previously stored in the control unit, even if the critical part of the system fails.
Function
Backup
Fail-safe
function
Related
sensor
ECM
(-TCM)
Mass air flow sensor
Engine coolant temperature sensor
Heated
o w e n sensor
Knock sensor
Throttle position sensor
Throttle motor sensor
Motor throttle switch
Malfunction
The microcomputer in the control unit (CPU) is malfunctioning.
Output voltage dropped below 0.3V while the engine is running.
Same as self-diagnostic malfunction detection conditions.
Heated oxygen sensor output voltage exceeded approx. 2V for predetermined time.
Same as self-diagnostic malfunction detection conditions.
Same as self-diagnostic malfunction detection conditions.
Same as self-diagnostic malfunction detection conditions.
Same as self-diagnostic malfunction detection conditions.
Fail-safehackup
Fixes the ignition timing, fuel injection pulse width, and AAC valve opening to the preset values so that the vehicle can be driven.
-- - -
Selects the fuel injection pulse width according to the engine speed and the throttle opening so that the vehicle can be driven. Fuel injectionwill be inhibited when the engine speed exceeded approx. 2,400 rpm. During fail-safe control, idle speed is controlled to 800 rpm.
Uses the estimated engine coolant temperature (varies with elapsed time after start) to perform controls so that the vehicle can be driven normally. The auxiliary electric fan relay is turned ON. On RB25DET model, the turbo pressure control solenoid valve remains OFF.
Inhibits aidfuel ratio feedback control.
Judges the vehicle as of regular specification. Retards the ignition timing within the knocking range so that the vehicle can be driven normally.
Determines idle position according to the throttle position and the engine speed.
Fixes the output to the preset value so that the vehicle can be driven normally.
On RB25DET model, the turbo pressure control solenoid valve remains OFF.
- -
Fixes the throttle motor sensor output to the preset value by turning the TCS switch ONIOFF, so that the vehicle can be driven normally.
Fixes the TCS switch OFF.
MIL indication
MIL lights up.
MIL lights up.
MIL lights up.
MIL lights up.
MIL lights up.
MIL lights up.
G]
I
A'
%R
ST
R8
d
d
t.. -
Self-diagnosis
DESCRIPTION
In self-diagnosis,when any of the critical sensors in the engine control system fails and the self-diagnos- tic malfunctiondetection conditions are satisfied, the malfunctioningsystem is stored in the control unit for easier trouble diagnosis.
There are two methods to indicate the presence of a malfunction: By illuminatingthe malfunction indicator lamp (MIL) on the combination meter or by displaying on the CONSULT screen. Here describes indication by the malfunction indicator lamp.
There are two types of diagnostic test modes: Mode I and Mode 11. Mode I is normal status. Mode I1is either SELF-DIAGNOSTIC RESULT or HEATED OXYGEN SENSOR MONITOR function.
SELF-DIAGNOSIS OPERATION PROCEDURE
To activate Diagnostic Test Mode I1self-diagnosis, with the ignition witch turned ON (engine not running), connect terminals CHK and IGN on the data link connector for 2 or more seconds with a suitable harness, then disconnect them.
Perform self-diagnosis with the ignition switch remain in ON position. [Mode I1 SELF-DIAGNOSTIC RESULTS]
When engine is started in the above status, the heated oxygen sensor monitor function will be activated. [Mode II HEATED OXYGEN SENSOR MONITOR]
When ignition switch is turned off during diagnosis, the diagnosis will automatically returns to Diagnostic Test Mode I. [Normal status]
I |
1 r I, |
rest Mode I- |
|
I+I I r\II |
MAL~UNLMNIWARNlNfi |
Switching diagnostic test modes
n
Connect terminals "CHIC and 'IGN' on the data link connector for CONSULT for 2 or more seconds w~tha suitable harness, then disconnect them.
|
Diagnostic Test Mode II -SELF-DI- |
|
|
AGNOSTIC RESULTS |
|
|
MIL indication (Blinkmg) |
|
|
When normal: MIL blinks to indicate |
|
|
'DTC55'. |
|
|
When malfunction detected: MIL |
|
11 |
blinks to indicate DTC of malfunction- |
II |
ing systern(s). |
||
|
|
Erasing self-diagnostic results
DiagnosticTest Mode I1 -HEATED
OXYGEN SENSOR MONITOR MIL indicabon (Blinking)
Indicates lean (ON) and rich (OFF).
Connect Leyinals 'CHIC and 'IGN" on the data hnk connector for CONSULT for 2 or more seconds with a suitable harness. then dsconnect them.
CAUTION: When ignition switch is turned ON within several seconds after it i s turned OFF wh~leDiagnostic Test Mode II -SELF-DIAGNOSTIC
RESULTSIHEATEOOXYGEN SENSOR MONITOR i s activated, SELF-DIAGNOSTIC RESULTS will be performed again.
I \
Malfunctionindicator lamp
Example: Blinking pattern for DTC "43"
TROUBLE DIAGNOSES
Self-diagnosis (Cont'd)
MALFUNCTiON INDICATOR LAMP (MIL) INDICATION
Diagnostic test mode I -BULB CHECK
0 The malfunction indicator lamp bulb check is carried out when the ignition switch is turned ON (engine not started).
The malfunction indicator lamp should come ON when the ignition switch is turned ON, and go OFF when the engine is started.
Diagnostic test mode I -MALFUNCTION WARNING
The system goes into the malfunction warning mode when any of the following conditions is satisfied, and warns the driver by lighting up the malfunction indicator lamp in the combination meter.
Microcomputer in the ECM control unit (CPU) is malfunction- 1 ing.
Malfunction is detected during mass airflow sensor circuit selfdiagnosis.
Malfunction is detected during engine coolant temperature sensor circuit self-diagnosis.
Malfunction is detected during vehicle speed sensor circuit self-diagnosis.
Malfunction is detected during ignition signal circuit self-diag- nosis.
Malfunction is detected during overheat self-diagnosis. Malfunction is detected during heated oxygen sensor circuit self-diagnosis.
~alfunsionis detected during throttle position sensor circuit self-diagnosis.
Malfunction is detected during Turbo pressure sensor circuit self-diagnosis. [RB25DET model]
Malfunction is detected during throttle motor sensor circuit selfdiagnosis. [RB25DET model]
Diagnostic test mode I1-SELF-DIAGNOSTIC RESULTS
0This mode indicates the malfunctioning system(s) by the malfunction indicator lamp blinking pattern (indicating the DTC).
0 When no malfunction is detected, DTC "55" is indicated.
O N h
OFF
Approx. 8.7S
OFF
(Rich)
Duty ratio in 1 cycle 1Lean: Al(A + B) x 100
Rich: B/(A + B)x 100
Diagnostic test mode II -HEATED OXYGEN SENSOR
MONITOR
0This mode indicates status of the aidfuel ratio by blinks of the malfunction indicator lamp.
Warm up the engine and increase and maintain the engine speed at 2,000 rpm. Check that the malfunction indicator lamp blinks at least five times in 10 seconds.
During airlfuel ratio feedback control,
when heated oxygen sensor output is high (rich): MIL goes OFF.
when heated oxygen sensor output is low (lean): MIL comes ON.
When aidfuel ratio feedback control is clamped: Status just before clamp is maintained.
When airifuel ratio feedback control is stopped: MIL goes OFF.
EFJ0041C
TROUBLE DIAGNOSES Self-diagnosis (Cont'd)
SELF-DIAGNOSTIC INDICATION ITEMS
DTC No.
,,
Self-diagnostic test items |
Malfunction (DTC No.) indication conditions (Malfunction is detected when ...) |
MIL indication |
|
l o (POS) signal or 120" (REF) signal is not input for predetermined time |
- |
Crankshaft position sen- |
while the engine is running. |
|
sor signal circuit |
Abnohal correlation is detected between 1" (POS) signal and 120" (REF) |
|
|
sianal. |
|
|
" |
|
Mass air flow sensor l2 signal circuit
Engine coo'anttemperature sensor signal circuit
Vehicle speed sensor
14signal circuit
Motor throttle switch signal circuit [RB25DET]
ABS-TCS control unit circuit JRB25DEl-l
Ignition signal circuit
Turbo pressure sensor signal circuit [RB25DET]
Overheat
Heated oxygen sensor signal circuit
I
IKnock sensor signal circuit
Throttle position sensor signal circuit
ABS-TCS communication circuit [RB25DET]
Throttle motor sensor signal circuit [RB25DET]
Afr communication circuit
NQmalfunction
Mass air flow sensor output voltage is 4.9V or greater for predetermined time when ignition switch is turned from OFF to ON, or after the engine is stalled.
Mass air flow sensor output voltage is less than 0.3V for predetermined I time while the engine is running.
Engine coolant temperature sensor output voltage is approx. 4.8V or greater (open circuit) or less than 0.06V (short circuit) for predetermined time- - --
No vehicle speed signal is input for predetermined time while the vehicle is being driven after warm up.
Abnormal correlation is detected between input voltages from the throttle motor sensor and from the motor throttle switch for predetermined time.
Throttle control unit detects malfunction in the system. (Open throttle sen- sor harness, etc.)
TCS/ABS control unit detects malfunction.
No consecutive ignition signal while the engine is running.
Turbo pressure sensor output voltage is approx. 4.8V or greater (open circuit) or less than 0.06V (short circuit) for predetermined time.
Engine coolant temperature sensor output voltage is approx. 0.35V or less (sensor normal) for predetermined time.
aHeated oxygen sensor output voltage is approx. 0.2V or greater and less than approx. 0.4V for predeterminedtime while the vehicle is being driven
aner warm up.
Heated oxygen sensor output voltage is approx. 2V or greater for predeter-
1 mined time.
Ia At least one knock sensor indicates the output voltage of approx. 4V or greater (open circuit) or less than approx. 1V (short circuit).
Throttle position sensor output voltage is approx. 4.7V or greater (open circuit) or less than 0.06V (short circuit) for predetermined time while ark/ neutral position switch is OFF and vehicle speed is 4 k d h or higher.
MIL lights up.
I
MIL lights up.
MIL lights up.
-
I1 -
MIL lights up.
lights up.
MIL lights up.
MIL lights up.
I
-
MIL liqhts- up.
aMalfunction (openlshort circuit, etc.) is detected in multiplex communication line between enaine and TCWABS.
aThrottle motor sensor input voltage is approx. 4 1 8 ~ ogreater (open circuit) or less than 0.3V (short circuit) for predeterminedtime.
Malfunction is detected in P A communication circuit in ECM (-TCM). [RBZODE (UB), RB25Dm
aMalfunction (open circuit, short circuit, etc.) is detected in multiplex communication line between ECM and TCM. [RB25DE1
No malfunction is detected in all the above circuits.
- - -
-
I MIL lights up.
I -
Some of the above ~ e l f a i a ~ n o s ttestic items can cause related malfunctions to be detected in M, throttle control, and ABS seif-diagnosis when malfunction is detected. Therefore, malfunctions should also be checked in self-diagnostic tests for systems other than engine.
CONDITIONS TO TURN OFF MALFUNCTION INDICATOR LAMP
Vehicle speed sensor signal circuit: Correct the sensor signal, then drive the vehicle at 4 km/h or higher. Overheat: Check for causes of overheat, then erase self-diagnostic results.
Other items: Malfunction indicator lamp turns OFF when the vehicle returned to normal condition.
HOW TO ERASE SELF-DIAGNOSTIC RESULTS
In Diagnostic Test Mode II, with the engine stopped (ignition switch ON), connect terminals "CHK" and "IGFP on the data link connector for 2 or more seconds with a suitable harness, then disconnect them.
TROUBLE DIAGNOSES
CONSULT
CONSULT INSPECTION PROCEDURE
|
Turn ignition switch OFF. |
|
|
Connect "CONSULT to data link connector for CONSULT. |
|
|
(Data link connector for CONSULT is located under the instru- |
I |
|
ment lower cover on the driver'sside on both LHD and RHD |
|
|
models.) |
|
|
|
|
|
Turn ignition switch ON. |
|
NISSAN |
Touch "START'. |
|
|
|
CONSULT
START
I |
1 |
I
1b
[
SUB MODE
BR455C
Touch "ENGINE".
SELECTeYSTEM
ENGINE
I
b SELECTDIAG MODE n] |
Perform each diagnostic test mode according to each service |
procedure. |
|
WORK SUPPORT |
For further information, see the CONSULT Operation Manual. |
SELF-DIAG RESULTS |
|
DATA MONITOR |
|
ACTIVE TEST |
|
FUNCTIONTEST |
|
,ECMPARTNUMBER |
|
SEF288S
FUNCTION
Diagnostic test mode
Work support
Self-diagnostic results
Data monitor
Active test
Function test
ECM part number
TROUBLE DIAGNOSES
CONSULT (Cont'd)
Function
A technician can adjust some devices faster and more accurately by following indications on CONSULT.
Self-diagnostic resuits can be read and erased quickly.
Input/Output data in the ECM can be read.
CONSULT drives some actuators apart from the ECM'sand also shifts some parameters in a specified range.
Conducted by CONSULT instead of a technician to determine whether each system is "OK" or "NG".
ECM part number can be read.
WORK SUPPORT MODE
WORK ITEM |
I |
CONDITION |
I |
USAGE |
|
THRTL POS SEN ADJ |
CHECK THE THROTTLE POSITION SENSOR SIGNAL. |
|
When adjusting throttle position |
|
|
|
ADJUST IT TO THE SPECIFIED VALUE BY ROTATING |
|
sensor initial position |
|
|
|
THE SENSOR BODY UNDER THE FOLLOWING CONDI- |
|
|
|
|
|
TIONS. |
|
|
|
|
|
0 |
IGN SW "ONn |
|
|
|
|
0 |
ENG NOT RUNNING |
1 |
|
I |
|
I |
ACC PEDAL NOT PRESSED |
|
||
IACV-AAC VALVE ADJ |
ISET ENGINE SPEED AT THE SPECIFIED VALUE UNDER I |
|
1 |
||
|
THE FOLLOWING CONDITIONS. |
|
|
|
|
|
|
ENGINE WARMED UP |
|
|
I |
|
0 |
NO-LOAD |
|
|
|
FUEL PRESSURE RELEASE |
|
FUEL PUMP WILL STOP BY TOUCHING "START" |
When releasing fuel pressure |
||
|
|
DURING IDLING. |
from fuel line |
|
|
|
|
CRANK A FEW TIMES AFTER ENGINE STALLS. |
|
|
|
i |
|
|
|
|
J |
TROUBLE DIAGNOSES
m
CONSULT (Cont'd)
SELF-DIAGNOSTIC RESULTS MODE
When any of the control unit input/output signal circuits fails and the self-diagnostic malfunction detection conditions are satisfied, the malfunctioningcircuit is stored in the memory and displayed later.
Self-diagnostictest items I |
Malfunction is detected when ... |
Malfunction display item I |
Data storage |
(Yes/No, |
Crankshaft position sensor signal circuit
Mass air 'lowsensor sig- nal circuit
Engine coolant temperature sensor signal circuit
Vehicle speed sensor signal circuit
switch signal circuit JRB25DETI
ABS-TCScontrol unit circuit [RB25DETJ
lgnition signal circuit
Turbo pressure sensor signal circuit [RB25DETl
Overheat
Heatedoxygen sensor signal circuit
1" (POS) signal or 120" (REF) signal is not input for pre- |
|
determined time while the engine is running. |
Crankshaft position sen- |
Abnormal correlation is detected between 1" (POS) sig- |
sor |
nal and 120" (REF) signal. |
|
Mass air flow sensor output voltage is 4.9V or greater for predetermined time when ignition switch is turned from OFF to ON, or after the engine is stalled.
Mass air flow sensor output voltage is less than 0.3V for I predetermined time while the engine is running.
Engine coolant temperature sensor output voltage is approx. 4.8V or greater (open circuit) or less than 0.06V (short circuit) for predetermined time.
I
No vehicle speed signal is input for predetermined time while the vehicle is beina driven after warm UD.
Abnormal correlation is detected between input voltages from the throttle motor sensor and from the motor throttle switch for predeterminedtime.
Throttle control unit detects malfunction in the system. (Open throttle sensor harness, etc.)
TCS/ABS control unit detects malfunction.
Mass air flow sensor |
|
1 |
1 |
Engine coolant tempera- |
|
ture sensor |
I |
IVehicle speed sensor |
|
Motor throttle switch |
|
ABS-TCS C/U SIGNAL |
|
No consecutive ignition signal while the engine is run- |
lgnition switch (Start sig- |
ning. |
nal) |
Turbo pressure sensor output voltage is approx. 4.8V or |
TURBO PRESS SENSOR |
greater (open circuit) or less than 0.06V (short circuit) for |
|
predetermined time. |
|
Engine coolant temperature sensor output voltage is |
OVER HEAT |
approx. 0.35V or less (sensor normal) for predetermined |
|
time. |
|
Heated oxygen sensor output voltage is approx. 0.2V or |
|
greater and less than approx. 0.4V for predetermined |
|
time while the vehicle is being driven after warm up. |
Oxygen sensor |
Heated oxygen sensor output voltage is approx. 2V or |
|
greater for medetermined time. |
|
yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Knock cuit
Throttle position sensor signal circuit
ABS-TCS communication circuit [RB25DETl
Throttle motor sensor signal circuit [RB25DET]
AiT communication circuit
No malfunction
At least one knock sensor indicates the output voltage of approx. 4V or greater (open circuit) or less than approx. 1V (short circuit).
Throttle position sensor output voltage is approx. 4.7V or greater (open circuit) or 0.06V or less (short circuit) for predetermined time while parkheutral position switch is OFF and vehicle s ~ e e dis 4 km/h or hiaher.
1
Malfunction (openlshort circuit, etc.) is detected in multiplex communication line between enaine and TCS/ABS.
Throttle motor sensor input voltage is approx. 4.8V or greater (open circuit) or less than 0.3V or less (short circuitl for redetermined time.
Malfunction is detected in A/T communication circuit in ECM (.TCM). (RB2ODE (UB), RB25DET]
aMalfunction (opedshort circuit, etc.) is detected in multiplex communication line between ECM and TCM. [RB25DE1
No malfunction is detected in all the above circuits.
Knock sensor
Thronle position sensor
IABSrrCS C,u
Motor throttle sensor
A/T COMM LINE
NO SELF DIAGNOSTIC FAILURE INDICATED. FURTHER TESTING MAY BE REQUIRED.
Yes
Yes
Yes
Yes
-.
AT
mm
19L ~ J
--
ST
RS
EL
8D
Some of the above self-diagnostic test items can cause related malfunctions to be detected in An; throttle control, and ABS self-diagnosis when malfunction is detected. Therefore, malfunctionsshould also be checked in self-diagnostic tests for systems other than engine.
TROUBLE DIAGNOSES
CONSULT (Cont'd)
DATA MONITOR MODE
Monitored item |
ECM |
Main |
Description |
Remarks |
|
[Unit] |
input |
||||
signals |
|||||
|
signals |
|
|
||
|
|
|
lndicates the engine speed computed |
|
|
|
|
|
from the POS signal (losignal) of the |
|
|
|
|
|
camshaft position sensor. |
|
|
- |
|
|
|
|
MAS AIRiFL SE [V]
0 2 SEN [V]'
MiR F/C MNT* [RICH/LEAN]
The signai voltage of the mass air flow
0 sensor is displayed.
The engine coolant temperature (determined by the signal voltage of the engine
0 coolant temperature sensor) is displayed.
The signal voltage of the oxygen sensor is displayed.
Display of oxygen sensor signal during air-fuel ratio feedback control:
RICH ... means the mixture became "rich", and control is being affected toward a leaner mixture.
LEAN ... means the mixture became "lean", and control is being affected toward a rich mixture.
When the engine is stopped, a certain value is indicated.
When the engine coolant temperature sensor is open or short-circuited, ECM enters fail-safe mode. The engine coolant temperature determined by the ECM is displayed.
0After turning ON the ignition switch, "RICH" is displayed until air-fuel mixture ratio feedback control begins.
When the air-fuel ratio feedback is clamped, the value just before the clamping is displayed continuously.
VHCL SPEED SE [krn/h] or [mph]
BATTERY VOLT [V]
THRTL POS SEN [V]
The vehicle speed computed from the vehicle speed sensor signal is displayed.
The power supply voltage of ECM is dis- I played.
The throttle position sensor signal voltage is displayed.
THRTL POS SE2 [V] 0 RB25DET
TURBO BOOST SENSOR
RB25DET
-
START SIGNAL [ON/OFF]
CLSD THUP SW [ 0N/OFF]
AIR COND SIG [ON/OFF]
PiN POSl SW [ONIOFF)
PW/ST SIGNAL [ONIOFF]
LOAD SIGNAL [ON/OFF]
NOTE:
Throttle motor sensor output voltage
Turbo pressure sensor output voltage
Indicates [ON/OFF] condition from the
0 starter signal.
0
lndicates [ON/OFF] condition from the throttle position sensor signal.
0lndicates [ON/OFF] condition of the air conditioner switch as determined by the air conditioner sianal.
lndicates [ON/OFFj condition from the parldneutral position switch signal.
lndicates [ON/OFfl condition from the electrical load signal andlor lighting switch.
ON ... |
rear defogger is operating. |
OFF ... |
rear defogger is not operating. |
Approx. 4.6V
0 Approx. 2.7V
After starting the engine, [OFF] is dis-
played regardless of the starter signal.
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically. *: Models with three way catalyst.
TROUBLE DIAGNOSES .
CONSULT (Cont'd)
Monitoreditem |
Description |
Remarks |
[Unit] |
signals
INJPULSE [msec] lndicates the actual fuel injection pulse When the engine is stopped, a certain width compensated by ECM according to computed value is indicated.
the input siqnals.
IGN TIMING [BTDC]
IACV-AACN I%]
PURG VOL C N [ONIOFFdutyj
AIF ALPHA [%]
AIR COND RLY [ONIOFF]
VlAS S N [ONIOFF]
RB20DE (UB), RB25DE
SWRL CONT S N [ON/OFF]
0 RB20DE (UB)
COOLING FAN [HVLOW/OFF] 
RB25DE, RB25DET
TURBO CONT S N
0 RB25DET
PD PRESSURE
SENSOR M
,VOLTAGE
I |
lo |
lndicates the ignition timing computed by |
ECM according to the input signals. |
I |
lo |
lndicates IACV-AACN control value com- |
|
|
puted by ECM according to the input sig- |
|
|
nals. |
lndicates the EVAP canister purge volume control valve computed by the ECM according to the input signals.
The opening becomes larger as the
value increases.
-
The mean value of the air-fuel ratio feedback correction factor per cycle is indicated.
The air conditioner relay control condition (determined by ECM according to the input signal) is indicated.
-- - -
Indicates the fuel pump relay control condition determined by ECM according to the input signals.
The control condition of the intake valve timing control solenoid valve is indicated. ON ... Intake valve timing control is operating.
OFF ... lntake valve timing control is not operating.
Control conditions computed by ECM
Solenoid valve activated: ON
Solenoid valve not activated: OFF
The control condition of the cooling fan (determined by ECM according to the input signal) is indicated.
HI ... High speed operation LOW ...Low speed operation OFF ...Stop
Control conditions computed by ECM
Solenoid valve activated: ON
Solenoid valve not activated: OFF
Refrigerant pressure sensor output voltage
Voltage measured by the voltage probe.
Pulse width, frequency or duty cycle measured by the pulse probe.
When the engine is stopped, a certain value is indicated.
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- |
When the engine is stopped, a certain value is indicated.
This data also includes the data for the air-fuel ratio learning control.
Approx. 0.36V min.
(Varies with air conditioner refrigerant pressure)
Only "#" is displayed if item is unable to be measured.
rFigures with "#"s are temporary ones. They are the same figures as an actual piece of data which was just previously measured.
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