Nissan Pathfinder (2005 year). Instruction — part 55
TROUBLE DIAGNOSIS
ATC-87
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ATC
2005 Pathfinder
6.
CHECK REAR BLOWER MOTOR RELAY (COIL SIDE) POWER SUPPLY CIRCUIT
Check voltage between rear blower motor relay harness connector
E25 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 E25 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-80, "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 E25.
3.
Turn ignition switch ON.
4.
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.
WJIA1124E
ATC-88
TROUBLE DIAGNOSIS
2005 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-91, "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-92, "Rear Blower Motor Resistor"
.
OK or NG
OK
>> GO TO 14.
NG
>> Replace rear blower motor resistor. Refer to
ATC-145, "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
TROUBLE DIAGNOSIS
ATC-89
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ATC
2005 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 terminals 3, 7, and 8, and rear blower motor resistor con-
nector B133 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.
17.
CHECK REAR FAN SWITCH (FRONT) CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect rear air control connector.
3.
Check continuity between rear blower switch (front) connector
M52 terminals 3, 5, 7), and 8, and rear air control connector
R208 terminals 9, 6, 8, and 7.
OK or NG
OK
>> GO TO 18.
NG
>> Repair harness or connector.
2 - 3
: Continuity should exist.
2 - Ground
: Continuity should not exist.
WJIA1126E
Terminal No.
Continuity
Rear fan switch (front)
Rear blower motor resistor
3
1
Should exist
7
4
8
2
WJIA1282E
Terminal No.
Continuity
Rear fan switch (front)
Rear air control
3
9
Should exist
5
6
7
8
8
7
WJIA1283E
ATC-90
TROUBLE DIAGNOSIS
2005 Pathfinder
18.
CHECK REAR BLOWER SWITCH (FRONT)
Refer to
ATC-91, "Rear Blower Switch (Front)"
.
OK or NG
OK
>> GO TO 19.
NG
>> Replace rear blower switch (front). Refer to
.
19.
CHECK REAR BLOWER SWITCH (REAR) IN REAR AIR CONTROL
Refer to
.
OK or NG
OK
>> Repair harness between rear blower motor and rear blower switch (front) or rear air control.
NG
>> Replace rear air control.
20.
CHECK CIRCUIT BETWEEN FRONT AIR CONTROL AND FUSE BLOCK (J/B) [REAR BLOWER
MOTOR RELAY (COIL SIDE) POWER]
1.
Disconnect rear blower motor relay and fuse block (J/B) connec-
tors M3.
2.
Check continuity between rear blower motor relay harness con-
nector E25 terminal 2 and fuse block (J/B) connector M3 termi-
nal 5N.
OK or NG
OK
>> Replace rear blower motor relay.
NG
>> Repair harness or connector.
Continuity should exist.
WJIA1129E
TROUBLE DIAGNOSIS
ATC-91
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ATC
2005 Pathfinder
COMPONENT INSPECTION
Rear Blower Motor Relay
Check circuit continuity between terminals by supplying 12 volts and
ground to coil side terminals of relays.
Rear Air Control
Check continuity between terminals at each switch position.
Rear Blower Switch (Front)
Check continuity between terminals at each switch position.
LJIA0068E
WJIA1130E
WJIA1284E
ATC-92
TROUBLE DIAGNOSIS
2005 Pathfinder
Rear Blower Motor
Check that there are no foreign particles inside the intake unit.
Apply 12 volts to terminal 1 and ground to terminal 2 and ensure that
the blower motor rotates freely and quietly.
Rear Blower Motor Resistor
Check continuity between terminals. There will be resistance, but
there should not be an open or short between any two terminals.
WJIA1268E
WJIA1269E
TROUBLE DIAGNOSIS
ATC-93
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ATC
2005 Pathfinder
Rear Air Control Circuit
EJS002X9
SYMPTOM:
●
Temperature cannot be adjusted from the rear air control.
INSPECTION FLOW
*1
ATC-55, "Operational Check (Rear)"
. *2
ATC-50, "A/C System Self-diagno-
sis Function"
.
*3
ATC-51, "SELF-DIAGNOSIS CODE
CHART"
*4
ATC-94, "DIAGNOSTIC PROCE-
DURE FOR REAR AIR CONTROL"
.
*5
ATC-69, "DIAGNOSTIC PROCE-
DURE FOR AIR MIX DOOR
MOTOR (REAR)"
.
WJIA1270E
ATC-94
TROUBLE DIAGNOSIS
2005 Pathfinder
SYSTEM DESCRIPTION
Component Parts
Rear air control system components are:
●
Front air control
●
Rear air control
●
Air mix door motor (rear)
●
Rear blower motor relay
●
Rear blower motor resistor
●
Rear blower motor
System Operation
Rear Air Control
When the rear fan switch (front) (integral to the front air control) is in the REAR position the rear blower motor
speeds and the rear temperature/mode are controlled by the rear fan switch (rear) and the rear temperature
switch (rear) (both integral to the rear air control).
DIAGNOSTIC PROCEDURE FOR REAR AIR CONTROL
SYMPTOM:
●
Blower motor operation is malfunctioning. Refer to
ATC-82, "Rear Blower Motor Circuit"
.
●
Temperature/mode operation is malfunctioning.
1.
CHECK OPERATION FROM FRONT AIR CONTROL
Does rear temperature/mode operate normally from front air control?
YES or NO
YES
>> GO TO 2.
NO
>> Refer to
ATC-69, "DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR MOTOR (REAR)"
.
WJIA1132E
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