PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front sea t belt , helps t o redu ce th e r isk or s everi ty of injury to th e driv er an d front passenge r for c ertain
types of collision. Info rmation necessary to service the system safely is included in the SRS and SB section of
this Service Manual.
WARNING:
●To avoid rendering the SRS inoperativ e, which cou ld increase the risk of persona l 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/INFINITI dealer.
●Improper maintenance, in cluding incorrect removal a nd installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For rem ova l of Sp iral Ca ble an d Air
Bag Module, see the SRS section.
●Do not use electrical test equipme nt on any circuit related to the SRS unle ss instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors .
EJS004L7
Wiring Diagrams and Trouble DiagnosisEJS000WA
When you read wiring diagrams, refer to the following:
●GI-14, "How to Read Wiring Diagrams" in GI section.
●PG-3, "Wiring Diagram — POWER —" in PG section.
When you perfo rm trouble diagnosis, refer to the following:
●GI-10, "How to Follow Trouble Diagnoses" in GI section.
●GI-23, "How to Perform Efficient Diagnosis for an Electrical Incident" in GI section.
MTC-2
Page 3
TROUBLE DIAGNOSIS
TROUBLE DIAGNOSISPFP:00004
How to Perform Trouble Diagnoses for Quick and Accurate RepairEJS001FB
WORK FLOW
A
B
C
D
*1 MTC-7, "Operational Check"
SYMPTOM TABLE
SymptomReference Page
Air outlet does not change.Go to Trouble Diagnosis Procedure for Mode Door.
Discharge air temperature does not change.Go to Trouble Diagnosis Procedure Air Mix Door.
Intake door does not change.
Intake door motor does not operate normally.
Blower motor operation is malfunctioning.Go to Trouble Diagnosis Procedure for Blower Motor Circuit.
Insufficient heatingGo to Trouble Diagnosis Procedure for Insufficient Heating.
Go to Trouble Diagnosis Procedure for Intake Door Motor Circuit.
SHA900E
MTC-9, "
MTC-10, "
MTC-11, "Intake
Door Motor Cir-
MTC-15, "
Motor Circuit"
MTC-19, "
cient Heating"
Mode
Door"
Air Mix
Door"
cuit"
Blower
Insuffi-
E
F
G
H
I
MTC
K
L
M
MTC-3
Page 4
TROUBLE DIAGNOSIS
Component Parts and Harness Connector LocationEJS001FC
PASSENGER COMPARTMENT
RJIA2845E
MTC-4
Page 5
TROUBLE DIAGNOSIS
Discharge Air FlowEJS001HF
A
B
C
D
E
F
G
H
I
MTC
K
L
M
SJIA0441E
MTC-5
Page 6
TROUBLE DIAGNOSIS
Wiring Diagram —HEATER—EJS001FD
TJWA0076E
MTC-6
Page 7
TROUBLE DIAGNOSIS
Operational CheckEJS001FE
The purpose of the operational check is to confirm that the system operates properly.
Conditions:Engine running at usual operating temperature
CHECKING BLOWER
1.Turn fan switch to 1st-speed. Blower should operate on low
speed.
2.Then turn fan switch to 2nd-speed, and continue checking
blower speed until all speeds are checked.
3.Leave blower on Max. speed.
If NG, go to trouble diagn osis procedure for MTC- 15, "
Circuit" .
If OK, continue with the check.
Blower Motor
RJIA0587E
A
B
C
D
E
CHECKING DISCHARGE AIR
1.Turn mode control dial to each position.
2.Confirm that discharg e air come s out acco rding to th e air distri bution table. Refer to MTC-5, "
If NG, go to trouble diagnosis procedure for MTC-9, "
*1 MTC-11, "Intake Doo r Mo to r Circuit".*2MTC-7, "Operational Check".*3MTC-3, "SYMPTOM TABLE".
COMPONENT DESCRIPTION
Intake Door Motor
The intake door motor is attached to the intake unit. It rotates so that
air is drawn from inlets set by the heater control panel. Motor rotation
is conveyed to a lever which activates the intake door.
H
I
MTC
RJIA0594E
K
L
M
RJIA0519E
MTC-11
Page 12
TROUBLE DIAGNOSIS
DIAGNOSTIC PROCEDURE FOR INTAKE DOOR MOTOR
SYMPTO M: Intake door does not operate normally.
1. CHECK POWER SUPPLY FOR HEATER CONTROL PANEL
1.Disconnect heater control p anel connector.
2.Turn ignition switch ON.
3.Check voltage between heate r control pane l harness connect or
M55 terminal 1 (BR/Y) and ground.
1 – Ground: Battery voltage
OK or NG
OK>> GO TO 2.
NG>> Check power supply circ uit and 10 A fuse [N o. 15,
located in the fuse block (J/B)]. Refer to PG-79, "
BLOCK - JUNCTION BOX (J/B)" .
● If OK, check harness for open circuit. Repair or replace if necessary.
● If NG, replace fuse an d check harness for short circuit. Repair or r eplace if necessary.
FUSE
RJIA2846E
RJIA2923E
2. CHECK GROUND CIRCUIT FOR HEATER CONTROL PANEL
1.Turn ig nition switch OFF.
2.Check continuity betwee n hea ter contro l panel harne ss co nnec tor M55 terminal 5 (B) and gr ound.
5 – Ground: Continuity should exist.
OK or NG
OK>> GO TO 3.
NG>> Repair harness or connector.
3. CHECK RECIRCULATION SWITCH CIRCUIT
1.Press REC (recirculat ion) switch.
2.Check continuity betwee n hea ter contro l panel harne ss co nnec tor M55 terminal 1 (BR/Y) and 5 (B).
1 (−) – 5 (+): Continuity should exist.
OK or NG
OK>> GO TO 4.
NG>> Replace heater control panel.
RJIA2924E
RJIA2925E
MTC-12
Page 13
TROUBLE DIAGNOSIS
4. CHECK POWER SUPPLY FOR INTAKE DOOR MOTOR
1.Reconnect heater control panel connector.
2.Turn ignition switch ON.
3.Check voltage between intake door motor harness connector M48 terminal 1 (Y/R: RHD models, R/W:
LHD models) and 2 (R/W: RHD models, L/R: LHD models).
RJIA2847E
Terminals
Model
Intake door motor
connector
RHD
models
LHD
models
M48
M48
OK or NG
OK>> Replace intake door motor.
NG>> GO TO 5.
(+)(-)
Terminal No.
(wire color)
2 (R/W)
1 (Y/R)2 (R/W)REC SW: OFF
1 (R/W)
2 (Y/R)1 (R/W)REC SW: OFF
Intake door motor
connector
M48
M48
Terminal No.
(wire color)
1 (Y/R)REC SW: ON
2 (Y/R)REC SW: ON
ConditionVoltage
Approx. 12V
Approx. 12V
A
B
C
D
E
F
G
H
I
MTC
K
M
L
MTC-13
Page 14
TROUBLE DIAGNOSIS
5. CHECK CIRCUIT CONTINUITY BETWEEN HEATER CONTROL PANEL AND INTAKE DOOR MOTOR
1.Turn ig nition switch OFF.
2.Disconnect heater control panel connector and intake door motor connect or.
3.Check continuity between heater control panel harness connector M55 terminal 10 (R/W) and intake door
motor harness connector M48 terminal 2 (R/W: RHD models) or 1 (R/W: LHD models).
4.Check continuity between heater control panel harness connector M55 terminal 11 (Y/R) and intake door
motor harness connector M48 terminal 1 (Y/R: RHD models) or 2 (Y/R: LHD models).
RJIA3145E
Terminals
Heater control panel connec-
tor
Connector
M55 10 (R/W) M48
M5511 (Y/R)M48
Terminal No.
(wire color)
OK or NG
OK>> Replace heater control panel.
NG>> Repair harness or connector.
Intake door motor connector
Connector
Terminal No.
(wire color)
2 (R/W): RHD models
1 (R/W): LHD models
1 (Y/R): RHD models
2 (Y/R): LHD models
Continuity
Yes
MTC-14
Page 15
TROUBLE DIAGNOSIS
Blower Motor CircuitEJS001FI
SYMPTOM: Blower motor operation is malf un cti on in g.
INSPECTION FLOW
A
B
C
D
E
F
G
*1 MTC-16, "DIAGNOSTIC PROCE-
DURE FOR BLOWER MOTOR".
*4 MTC-7, "
Operational Check".
*2 MTC-7, "
Operational Check".*3MTC-3, " SYMPTOM TABLE".
RJIA0601E
H
I
MTC
K
L
M
MTC-15
Page 16
TROUBLE DIAGNOSIS
DIAGNOSTIC PROCEDURE FOR BLOWER MOTOR
SYMPTOM: Blower motor operation is malfunctioning.
1. CHECK POWER SUPPLY FOR BLOWER MOTOR
1.Disconnect blow er motor connector.
2.Turn ignition switch ON.
3.Check voltage between blower motor harness connector M65
terminal 1 (L/W) and ground.
1 – Ground: Battery voltage
RJIA0602E
OK or NG
OK>> GO TO 2.
NG>> Check power supply circuit and 15A fuses [No s. 19 and
24, located in the fuse block (J/B)]. Refer to PG-79,
"FUSE BLOCK - JUNCTION BOX (J/B)" .
● If OK, check harness for open circuit. Repair or replace if necessary.
● If NG, replace fuse an d check harness for short circuit. Repair or r eplace if necessary.
2. CHECK GROUND CIRCUIT FOR BLOWER MOTOR
1.Turn ig nition switch OFF.
2.Turn fan switch to 1-speed.
3.Check continuity between blower motor harness connector M65
terminal 2 (L/B) and ground.
2 – Ground: Continuity should exist.
OK or NG
OK>> GO TO 3.
NG>> GO TO 4.
3. CHECK BLOWER MOTOR
Refer to MTC-18, "
OK or NG
OK>> INSPECTION END
NG>> Replace blower motor.
Blower Motor" .
RJIA2929E
RJIA2930E
MTC-16
Page 17
TROUBLE DIAGNOSIS
4. CHECK CIRCUIT CONTINUITY BETWEEN BLOWER MOTOR AND FAN RESISTOR
1.Disconnect fan resistor connector.
2.Check continuity between fan resistor harness connector M66
terminal 1 (L/B ) and bl ow e r mot o r har n es s con nec to r M6 5 t erm inal 2 (L/B).
1 – 2: Continuity should exist.
OK or NG
OK>> GO TO 5.
NG>> Repair harness or connector.
5. CHECK FAN RESISTOR
Refer to MTC-18, "
OK or NG
OK>> GO TO 6.
NG>> Replace fan resistor.
Fan Resistor" .
6. CHECK CIRCUIT CONTINUITY BETWEEN FAN RESISTOR AND HEATER CONTROL PANEL
1.Disconnect heate r control panel connector.
2.Check continuity between fan resistor harness connector M66
terminal 2 (L/R), 3 (L/Y) or 4 (L/W) and heater control panel harness connector M54 terminal 14 (L/W), 15 (L/Y) or 16 (L/R).
2 – 16: Continuity should exist.
3 – 15: Continuity should exist.
4 – 14: Continuity should exist.
OK or NG
OK>> GO TO 7.
NG>> Repair harness or connector.
A
B
C
D
RJIA2931E
E
F
G
H
I
MTC
RJIA2932E
K
7. CHECK CIRCUIT CONTINUITY BETWEEN BLOWER MOTOR AND HEATER CONTROL PANEL
Check continuity between blower motor harness connector M65 terminal 2 (L/B) and heater control panel harness connector M54 terminal 17 (L/B).
2 – 17: Continuity should exist.
OK or NG
OK>> GO TO 8.
NG>> Repair harness or connector.
RJIA2933E
8. CHECK FAN SWITCH
Refer to MTC-18, "
OK or NG
OK>> GO TO 9.
NG>> Replace fan switch.
Fan Switch" .
MTC-17
L
M
Page 18
TROUBLE DIAGNOSIS
9. CHECK GROUND CIRCUIT
Check continuity between heater control panel harness connector
M54 terminal 13 (B) and ground.
13 – Ground: Continuity should exist.
OK or NG
OK>> INSPECTION END
NG>> Repair harness or connector.
COMPONENT INSPECTION
Blower Motor
Confirm smooth rotation of the blower motor.
●Ensure that there are no foreign parti c les inside the intake unit.
RJIA2934E
Fan Switch
Check continu i t y b et w ee n h eater control co nn ec tor M54 terminal s a t
each switch position.
Switch positionTerminalsContinuity
OFF13 - 14, 15, 16, 17No
113 - 14
213 - 15
313 - 16
413 - 17
Yes
Fan Resistor
Check resistance between fan resister connector M66 terminals .