Nissan Pathfinder (2007 year). Instruction — part 54
TROUBLE DIAGNOSIS
ATC-83
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ATC
2007 Pathfinder
Rear Blower Motor Circuit
EJS004P9
SYMPTOM:
●
Blower motor operation is malfunctioning.
INSPECTION FLOW
1.
CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - REAR AIR CONTROL (FRONT)
1.
Press AUTO switch.
2.
Set the rear blower control dial (front) to REAR position.
3.
Turn the rear blower control dial (rear) and check for rear blower operation.
NOTE:
If the engine coolant temperature increases above 111.9
°
C (233.6
°
F) the front air control turns OFF the
rear blower motor. When the engine coolant temperature drops below 110
°
C (230
°
F) the front air control
turns the rear blower motor back ON.
4.
Continue checking that rear blower speed increases as the rear blower control dial is rotated clockwise.
Does the rear blower motor operate correctly?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK FOR ANY SYMPTOMS
Perform a complete operational check for any symptoms. Refer to
ATC-52, "Operational Check (Front)"
Does another symptom exist?
YES
>> Refer to
NO
>> System OK.
3.
CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 4.
4.
CHECK REAR BLOWER CONTROL DIAL (FRONT) CIRCUIT
Check and verify rear blower control dial (front) operates the rear blower motor in all speeds.
Does blower motor operate in all speeds?
YES
>> GO TO 5.
NO
>> Refer to
ATC-95, "DIAGNOSTIC PROCEDURE FOR REAR AIR CONTROL"
5.
PERFORM SELF-DIAGNOSIS
Perform self-diagnosis to check for any codes. Refer to
ATC-50, "A/C System Self-diagnosis Function"
Are any self-diagnosis codes present?
YES
>> Refer to
ATC-51, "SELF-DIAGNOSIS CODE CHART"
NO
>> GO TO 6.
6.
RECHECK FOR ANY SYMPTOMS
Perform a complete operational check for any symptoms. Refer to
ATC-52, "Operational Check (Front)"
Does another symptom exist?
YES
>> Refer to
NO
>> Replace front air control. Refer to
.
ATC-84
TROUBLE DIAGNOSIS
2007 Pathfinder
SYSTEM DESCRIPTION
Component Parts
Rear blower speed control system components are:
●
Front air control
●
Rear blower switch (front)
●
Rear blower switch (rear)
●
Rear blower motor resistor
●
Rear blower motor
●
Rear blower motor relay
System Operation
Rear Blower Control
When the rear blower switch (front) is in the OFF position, the rear blower motor cannot operate.
When the rear blower switch (front) is in the REAR position, it allows the rear blower switch (rear) to control
the rear blower motor speed. In any other position (1-4), the rear blower switch (front) controls the rear blower
motor speed regardless of the rear blower switch (rear) position.
DIAGNOSTIC PROCEDURE FOR REAR BLOWER MOTOR
Rear Fan Switch (Rear) Circuit
SYMPTOM:
●
Rear blower motor does not rotate when rear blower switch (front) is set to REAR position and rear blower
switch (rear) is set at 1 - 4 speed.
1.
CHECK REAR BLOWER MOTOR OPERATION
Rear blower motor rotates normally when rear blower switch (front) is set at 1 - 4 speed.
OK or NG
OK
>> GO TO 2.
NG
>> Refer to
ATC-86, "Trouble Diagnosis Procedure For Rear Blower Motor (1 - 4 Speed)"
.
2.
CHECK REAR BLOWER SWITCH (FRONT)
Refer to
ATC-92, "Rear Blower Switch (Front)"
.
OK or NG
OK
>> GO TO 3.
NG
>> Replace rear blower switch (front). Refer to
.
WJIA1280E
TROUBLE DIAGNOSIS
ATC-85
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ATC
2007 Pathfinder
3.
CHECK REAR BLOWER SWITCH (REAR)
Refer to
OK or NG
OK
>> GO TO 4.
NG
>> Replace rear blower switch (rear). Refer to
.
4.
CHECK CIRCUIT CONTINUITY
1.
Turn ignition switch OFF.
2.
Disconnect rear blower switch (front) connector and rear air con-
trol connector.
3.
Check continuity between rear blower switch (front) harness
connector M52 terminal 2 and rear air control harness connector
M208 terminal 10.
OK or NG
OK
>> Inspection End.
NG
>> Repair harness or connector.
2 - 10
: Continuity should exist.
WJIA1281E
ATC-86
TROUBLE DIAGNOSIS
2007 Pathfinder
Trouble Diagnosis Procedure For Rear Blower Motor (1 - 4 Speed)
SYMPTOM:
●
Rear blower motor does not rotate when rear blower switch (front) is set at 1 - 4 speed.
Inspection Flow
1.
CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - REAR BLOWER MOTOR
1.
Press AUTO switch.
2.
Set the rear blower control dial (front) to REAR position.
3.
Turn the rear blower control dial (rear) to rear blower speed position 1 and check for rear blower opera-
tion.
4.
Continue checking that rear blower speed increases as the rear blower control dial is rotated clockwise.
Does the rear blower motor operate correctly?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK FOR ANY SYMPTOMS
Perform a complete operational check for any symptoms. Refer to
ATC-52, "Operational Check (Front)"
.
Does another symptom exist?
YES
>> Refer to
.
NO
>> System OK.
3.
CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 4.
4.
CHECK REAR BLOWER MOTOR CIRCUIT
Check and verify rear blower motor operates in all speeds.
Does blower motor operate in all speeds?
YES
>> GO TO 5.
NO
>> Refer to
ATC-86, "Trouble Diagnosis Procedure For Rear Blower Motor (1 - 4 Speed)"
.
5.
PERFORM SELF-DIAGNOSIS
Perform self-diagnosis to check for any codes. Refer to
ATC-50, "A/C System Self-diagnosis Function"
.
Are any self-diagnosis codes present?
YES
>> Refer to
ATC-51, "SELF-DIAGNOSIS CODE CHART"
.
NO
>> GO TO 6.
6.
RECHECK FOR ANY SYMPTOMS
Perform a complete operational check for any symptoms. Refer to
ATC-52, "Operational Check (Front)"
.
Does another symptom exist?
YES
>> Refer to
.
NO
TROUBLE DIAGNOSIS
ATC-87
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ATC
2007 Pathfinder
1.
DIAGNOSTIC PROCEDURE FOR REAR BLOWER MOTOR (1 - 4 SPEED)
Blower motor rotates normally at each speed.
OK or NG
OK
>> Inspection End.
NG
>> 1. Does not rotate at any speed, GO TO 2.
2. Does not rotate at 1 - 3 speed, GO TO 13.
3. Does not rotate at 4 speed, GO TO 18.
2.
CHECK FUSES
Check 15A fuses (Nos. 28 and 31, located in the fuse and fusible link box). Refer to
OK or NG
OK
>> GO TO 3.
NG
>> GO TO 8.
3.
CHECK REAR BLOWER MOTOR POWER SUPPLY
1.
Turn ignition switch OFF.
2.
Disconnect rear blower motor connector.
3.
Select any rear blower speed except OFF.
4.
Turn ignition switch ON.
5.
Check voltage between rear blower motor harness connector
B201 terminal 1 and ground.
OK or NG
OK
>> GO TO 11.
NG
>> GO TO 4.
4.
CHECK REAR BLOWER MOTOR RELAY
Refer to
ATC-92, "Rear Blower Motor Relay"
OK or NG
OK
>> GO TO 5.
NG
>> Replace rear blower motor relay.
5.
CHECK REAR BLOWER MOTOR POWER FROM RELAY TO REAR BLOWER MOTOR
1.
Turn ignition switch OFF.
2.
Reconnect rear blower motor connector.
3.
Disconnect rear blower motor relay M163.
4.
Turn ignition switch ON.
5.
Set rear blower switch (front) to any position except OFF, REAR,
or 4 - speed.
6.
Momentarily (no more than 4 seconds), connect a jumper wire
between rear blower motor relay connector M163 (harness side)
terminals 6 and 7.
OK or NG
OK
>> GO TO 6.
NG
>> GO TO 10.
1 - Ground
: Battery voltage
WJIA1119E
Rear blower motor should rotate.
WJIA1120E
ATC-88
TROUBLE DIAGNOSIS
2007 Pathfinder
6.
CHECK REAR BLOWER MOTOR RELAY (COIL SIDE) POWER SUPPLY CIRCUIT
Check voltage between rear blower motor relay harness connector
M163 terminal 2 and ground.
OK or NG
OK
>> GO TO 7.
NG
>> Repair harness or connector.
7.
CHECK REAR BLOWER MOTOR RELAY (COIL SIDE) GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect the front air control M50.
3.
Check continuity between rear blower motor relay harness con-
nector M163 terminal 1 and front air control harness connector
M50 terminal 39.
OK or NG
OK
>> Replace front air control. Refer to
.
NG
>> Repair harness or connector.
8.
REPLACE FUSE
Refer to
PG-86, "FUSE AND FUSIBLE LINK BOX"
Fuse should not open when rear blower motor is activated.
OK or NG
OK
>> Inspection End.
NG
>> GO TO 9.
9.
CHECK REAR BLOWER MOTOR
Refer to
.
OK or NG
OK
>> Repair harness between the rear blower motor and the fuse.
NG
>> Replace rear blower motor. Refer to
10.
CHECK REAR BLOWER MOTOR RELAY (SWITCH SIDE) POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect rear blower motor relay M163.
3.
Check voltage between rear blower motor relay harness con-
nector E25 terminals 6 and 3, and ground.
OK or NG
OK
>> GO TO 20.
NG
>> Repair harness or connector.
2 - Ground
: Battery voltage
WJIA1289E
1 - 39
: Continuity should exist.
WJIA1123E
3, 6 - Ground
: Battery voltage should
exist.
WJIA1683E
TROUBLE DIAGNOSIS
ATC-89
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ATC
2007 Pathfinder
11.
CHECK REAR BLOWER MOTOR
Refer to
.
OK or NG
OK
>> GO TO 12.
NG
>> Replace rear blower motor. Refer to
.
12.
CHECK REAR BLOWER SWITCH (FRONT)
Refer to
ATC-92, "Rear Blower Switch (Front)"
OK or NG
OK
>> GO TO 15.
NG
>> Replace rear blower switch (front). Refer to
.
13.
CHECK REAR BLOWER MOTOR RESISTOR
Refer to
ATC-93, "Rear Blower Motor Resistor"
OK or NG
OK
>> GO TO 14.
NG
>> Replace rear blower motor resistor. Refer to
ATC-152, "REAR BLOWER MOTOR RESISTOR"
14.
CHECK REAR BLOWER SWITCH (FRONT) CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect rear blower switch (front) M52.
3.
Reconnect rear blower motor resistor harness connector B133.
4.
Turn ignition switch ON.
5.
Check voltage between each rear blower switch (front) connec-
tor M52 terminals 3, 5, 7, and 8, and ground.
OK or NG
OK
>> GO TO 17.
NG
>> GO TO 16.
Terminal No.
Voltage
(Approx.)
(+)
(-)
3
Ground
Battery voltage
5
7
8
WJIA1267E
ATC-90
TROUBLE DIAGNOSIS
2007 Pathfinder
15.
CHECK REAR BLOWER MOTOR GROUND CIRCUIT TO REAR BLOWER MOTOR RESISTOR
1.
Turn ignition switch OFF.
2.
Disconnect rear blower motor and rear blower motor resistor
connectors.
3.
Check continuity between rear blower motor connector B201
terminal 2 and rear blower motor resistor harness connector
B133 terminal 3.
4.
Check continuity between rear blower motor connector B201
terminal 2 and ground.
OK or NG
OK
>> GO TO 16.
NG
>> Repair harness or connector.
16.
CHECK REAR BLOWER SWITCH (FRONT) CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect rear blower switch (front) connector.
3.
Check continuity between rear blower switch (front) connector
M52 (A) terminals 3, 7, and 8, and rear blower motor resistor
connector B133 (B) terminals 1, 4, and 2.
OK or NG
OK
>> Repair harness between rear blower motor resistor and the rear blower motor.
NG
>> Repair harness or connector.
2 - 3
: Continuity should exist.
2 - Ground
: Continuity should not exist.
WJIA1126E
A
B
Connector
Terminal Connector
Terminal
Continuity
Rear blower switch
(front): M52
3
Rear blower
motor resistor:
B133
1
Yes
Rear blower switch
(front): M52
7
Rear blower
motor resistor:
B133
4
Yes
Rear blower switch
(front): M52
8
Rear blower
motor resistor:
B133
2
Yes
WJIA1651E
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