Nissan Pathfinder (2005 year). Instruction — part 54
TROUBLE DIAGNOSIS
ATC-79
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ATC
2005 Pathfinder
6.
CHECK VARIABLE BLOWER CONTROL POWER SUPPLY CIRCUIT FOR OPEN
1.
Disconnect variable blower control harness connector.
2.
Check continuity between front blower motor relay harness con-
nector E22 terminals 5 and 7 and variable blower control har-
ness connector M122 terminal 1.
OK or NG
OK
>> GO TO 7.
NG
>> Repair harness or connector.
7.
CHECK VARIABLE BLOWER CONTROL SIGNAL CIRCUIT
1.
Disconnect front air control connector.
2.
Check continuity between front air control harness connector
M50 terminal 32 and variable blower control harness connector
M122 terminal 2.
OK or NG
OK
>> GO TO 8.
NG
>> Repair harness or connector.
8.
CHECK FRONT BLOWER MOTOR RELAY (COIL SIDE) POWER SUPPLY
1.
Turn ignition switch ON.
2.
Check voltage between front blower motor relay connector E22
terminal 1 and ground.
OK or NG
OK
>> GO TO 9.
NG
>> Repair harness or connector.
9.
CHECK FRONT BLOWER MOTOR RELAY (COIL SIDE) GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Check continuity between front blower motor relay connector
E22 terminal 2 and front air control harness connector M50 ter-
minal 38.
OK or NG
OK
>> Replace front air control. Refer to
.
NG
>> Repair harness or connector.
5, 7 - 1
: Continuity should exist.
WJIA1262E
32 - 2
: Continuity should exist.
WJIA1263E
1 - Ground
: Battery voltage.
LJIA0080E
2 - 38
: Continuity should exist.
WJIA1115E
ATC-80
TROUBLE DIAGNOSIS
2005 Pathfinder
10.
REPLACE FUSES
1.
Replace fuses.
2.
Activate the front blower motor.
3.
Do fuses blow?
YES or NO
YES
>> GO TO 11.
NO
>> Inspection End.
11.
CHECK FRONT BLOWER MOTOR POWER SUPPLY CIRCUIT FOR SHORT
1.
Turn ignition switch OFF.
2.
Disconnect front blower motor connector and variable blower
control connector.
3.
Check continuity between variable blower control harness con-
nector M122 terminal 1 and ground.
OK or NG
OK
>> GO TO 12.
NG
>> Repair harness or connector.
12.
CHECK VARIABLE BLOWER CONTROL SIGNAL CIRCUIT
1.
Disconnect front air control connector.
2.
Check continuity between front air control harness connector
M50 terminal 32 and variable blower control harness connector
M122 terminal 2.
OK or NG
OK
>> Check blower motor. If OK, replace variable blower con-
trol. Refer to
.
NG
>> Repair harness or connector.
1 - Ground
: Continuity should not exist.
WJIA1264E
32 - 2
: Continuity should exist.
WJIA1263E
TROUBLE DIAGNOSIS
ATC-81
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ATC
2005 Pathfinder
COMPONENT INSPECTION
Front Blower Motor Relay
Check continuity between terminals by supplying 12 volts and
ground to coil side terminals of relay.
Front Blower Motor
Confirm smooth rotation of the blower motor.
●
Ensure that there are no foreign particles inside the blower unit.
●
Apply 12 volts to terminal 1 and ground to terminal 2 and verify
that the motor operates freely and quietly.
LJIA0068E
WJIA1265E
ATC-82
TROUBLE DIAGNOSIS
2005 Pathfinder
Rear Blower Motor Circuit
EJS002X8
SYMPTOM:
●
Blower motor operation is malfunctioning.
INSPECTION FLOW
*1
ATC-55, "Operational Check (Rear)"
*2
ATC-91, "Rear Blower Switch
(Front)"
*3
WJIA1266E
TROUBLE DIAGNOSIS
ATC-83
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2005 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-85, "Trouble Diagnosis Procedure For Rear Blower Motor (1 - 4 Speed)"
.
2.
CHECK REAR BLOWER SWITCH (FRONT)
Refer to
ATC-91, "Rear Blower Switch (Front)"
.
OK or NG
OK
>> GO TO 3.
NG
>> Replace rear blower switch (front). Refer to
.
WJIA1280E
ATC-84
TROUBLE DIAGNOSIS
2005 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 voltage between rear blower switch (front) harness con-
nector 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
TROUBLE DIAGNOSIS
ATC-85
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ATC
2005 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
.
.
*2
ATC-85, "Trouble Diagnosis Proce-
dure For Rear Blower Motor (1 - 4
Speed)"
*3
WJIA1058E
ATC-86
TROUBLE DIAGNOSIS
2005 Pathfinder
1.
DIAGNOSTIC PROCEDURE
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-91, "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 E25.
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 E25 (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
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