Nissan Pathfinder. Manual — part 718
MAGNET CLUTCH
HAC-133
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
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MAGNET CLUTCH
Component Function Check
INFOID:0000000009176870
1.
CHECK MAGNET CLUTCH OPERATION
Perform auto active test of IPDM E/R. Refer to
PCS-8, "Diagnosis Description"
Does it operate normally?
YES
>> Inspection End.
NO
>> Refer to
HAC-133, "Diagnosis Procedure"
Diagnosis Procedure
INFOID:0000000009176871
Regarding Wiring Diagram information, refer to
1.
CHECK FUSE
1. Turn ignition switch OFF.
2. Check 10A fuse (No. 53, located in IPDM E/R).
NOTE:
PG-85, "IPDM E/R Terminal Arrangement"
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace the blown fuse after repairing the affected circuit.
2.
CHECK MAGNET CLUTCH POWER SUPPLY CIRCUIT
1. Disconnect compressor connector and IPDM E/R connector.
2. Check continuity between compressor harness connector and IPDM E/R harness connector.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
3.
CHECK MAGNET CLUTCH GROUND CIRCUIT
1. Disconnect compressor connector.
2. Check continuity between compressor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair harness or connector.
4.
CHECK MAGNET CLUTCH
Directly apply battery voltage to the magnet clutch. Check operation visually and by sound.
Does it operate normally?
YES
>> Replace IPDM E/R. Refer to
PCS-32, "Removal and Installation"
.
NO
>> Replace magnet clutch. Refer to
HA-31, "MAGNET CLUTCH : Removal and Installation of Com-
Compressor
IPDM E/R
Continuity
Connector
Terminal
Connector
Terminal
F3
1
F19
56
Yes
Compressor
Continuity
Connector
Terminal
F3
2
Ground
Yes
HAC-134
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
PTC HEATER RELAY
PTC HEATER RELAY
Description
INFOID:0000000009176872
Power is supplied to the PTC heater with A/C auto amp. control.
Component Function Check
INFOID:0000000009176873
1.
CHECK REAR WINDOW DEFOGGER RELAY POWER SUPPLY CIRCUIT
Check that an operation noise of PTC heater relay (located in relay box) can be heard when operating the rear
air conditioning system in heat mode.
Is the inspection result normal?
YES
>> PTC heater relay power supply circuit is OK.
NO
>> Refer to
HAC-134, "Diagnosis Procedure"
Diagnosis Procedure
INFOID:0000000009176874
Regarding Wiring Diagram information, refer to
1.
CHECK PTC HEATER RELAY GROUND CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between A/C auto amp. connector and ground.
Is the inspection result normal?
YES
>> Replace A/C auto amp. Refer to
HAC-157, "Removal and Installation"
.
NO
>> GO TO 2.
2.
CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect A/C auto amp. and PTC heater relay connector.
3. Check continuity between A/C auto amp. connector and PTC heater relay connector.
4. Check continuity between A/C auto amp. connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace harness.
3.
CHECK PTC HEATER RELAY
Terminals
Voltage (V)
(Approx.)
(+)
(–)
A/C auto amp.
Terminal
M50
19
Ground
Battery voltage
39
A/C auto amp.
connector
Terminal
PTC heater relay
connector
Terminal
Continuity
M50
19
E11
2
Yes
39
E12
A/C auto amp. connec-
tor
Terminal
Ground
Continuity
M50
19
No
39
PTC HEATER RELAY
HAC-135
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
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Check PTC heater relay. Refer to
HAC-135, "Component Inspection"
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-49, "Intermittent Incident"
.
NO
>> Replace PTC heater relay.
Component Inspection
INFOID:0000000009176875
1.
CHECK PTC HEATER RELAY
1. Turn ignition switch OFF.
2. Remove PTC heater relay.
3. Check continuity between PTC heater relay terminal 3 and 5
when voltage is supplied between terminal 1 and 2.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Replace blower relay.
Terminal
Voltage
Continuity
3
5
ON
Yes
OFF
No
JSIIA1551ZZ
HAC-136
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
PTC HEATER
PTC HEATER
Diagnosis Procedure
INFOID:0000000009176876
Regarding Wiring Diagram information, refer to
1.
CHECK FUSE
1. Turn ignition switch OFF.
2. Check 30A fuse [No. 59 and 60, located in relay box].
NOTE:
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace the blown fuse after repairing the affected circuit.
2.
CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between PTC heater connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 4.
3.
CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect PTC heater connector.
3. Check continuity between PTC heater connector and ground.
Is the inspection result normal?
YES
>> Replace PTC heater. Refer to
VTL-20, "REAR BLOWER MOTOR 1 UNIT ASSEMBLY : Removal
.
NO
>> Repair or replace harness.
4.
CHECK HARNESS CONTINUITY
1. Disconnect PTC relay connectors.
2. Check continuity between PTC heater connector and PTC relay connector.
Terminals
Condition of rear
window
defogger switch
Voltage (V)
(Approx.)
(+)
(–)
PTC heater
connector
Terminal
M118
1
Ground
ON
Battery voltage
OFF
0
3
ON
Battery voltage
OFF
0
Rear window defogger connector
Terminal
Ground
Continuity
M117
2
Yes
4
PTC heater connec-
tor
Terminal
PTC heater
relay connec-
tor
Terminal
Continuity
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