2008 INFINITI FX35 Service Manual

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Page 457 of 3924

INFINITI FX35 2008 Service Manual
ATC-52
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
If all operational checks are OK (symptom cannot be duplicated), go to Incident Simulation Tests in GI-25,
"How to Perform Efficient Diagnosis for an

Page 458 of 3924

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The PTC is built into the A/C and AV switch. It can be set at an inter-
val of 0.5 °C (1.0 °F) in the 18 °C (60 °

Page 459 of 3924

INFINITI FX35 2008 Service Manual
ATC-54
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
2. Check continuity between unified meter and A/C amp. harnessconnector M56 terminal 29, 30 and ground.
OK or NG
OK >> Replace unified meter and A/C a

Page 460 of 3924

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Confirm A/C LAN signal between unified meter and A/C amp. har-
ness connector M57 terminal 43 and ground using an os

Page 461 of 3924

INFINITI FX35 2008 Service Manual
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TROUBLE DIAGNOSIS
3. Check continuity between each door motor harness connectorterminal 2 and ground.
OK or NG
OK >> GO TO 6.
NG >> Repair harness or connector.
6.CHECK

ATC-56
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
3. Check continuity between each door motor harness connectorterminal 2 and ground.
OK or NG
OK >> GO TO 6.
NG >> Repair harness or connector.
6.CHECK MOTOR OPERATION
1. Reconnect each door motor connector.
2. Turn ignition switch ON.
3. Confirm operation of each door motor.
OK or NG
OK >> (Return to operate normally.) Poor contact in motor connector.
NG >> (Does not operate normally.) GO TO 7.
7.CHECK AIR MIX DOOR MOTOR AND INTAKE DOOR MOTOR OPERATION
1. Turn ignition switch OFF.
2. Disconnect mode, air mix (driver side, pass enger side), and intake door motor connectors.
3. Reconnect air mix (driver side, passenger side) and intake door motor connectors.
4. Turn ignition switch ON.
5. Confirm operation of air mix door motor (driver side, passenger side) and intake door motor.
OK or NG
OK >> [Air mix (driver side, passenger side) and intake door motors operate normally.]
Replace mode door motor.
NG >> [Air mix (driver side, passenger side) and intake door motors does not operate normally.]
GO TO 8.
8.CHECK MODE DOOR MOTOR AND INTAKE DOOR MOTOR OPERATION
1. Turn ignition switch OFF.
2. Disconnect air mix door motor (driver side, passenger side) connectors.
3. Reconnect mode door motor connector.
4. Turn ignition switch ON.
5. Confirm operation of mode door motor and intake door motor.
OK or NG
OK >> (Mode and intake door motors operate normally.) GO TO 10.
NG >> (Mode and intake door motors does not operate normally.) GO TO 9.
9.CHECK MODE DOOR MOTOR AND AIR MIX DOOR MOTOR OPERATION
1. Turn ignition switch OFF.
2. Disconnect intake door motor connector.
3. Reconnect air mix door motor (driver side, passenger side) connectors.
4. Turn ignition switch ON.
5. Confirm operation of mode door motor and air mix door motor (driver side, passenger side).
OK or NG
OK >> [Mode and air mix door motor (driver side, passenger side) operate normally.] Replace intake door motor.
NG >> [Mode and air mix door motor (driver side, passenger side) does not operate normally.]
Replace display and A/C auto amp.
10.CHECK AIR MIX DOOR MOTOR OPERATION 2 – Ground : Continuity should exist.
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Page 462 of 3924

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1. Turn ignition switch OFF.
2. Disconnect air mix door motor (driver side) connector.
3. Turn ignition switch ON.
4.

Page 463 of 3924

INFINITI FX35 2008 Service Manual
ATC-58
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
SYSTEM DESCRIPTION
Component Parts
Mode door control system components are:
Unified meter and A/C amp.
Mode door motor (LCU)
A/C LAN system (PBR

Page 464 of 3924

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COMPONENT DESCRIPTION
Mode Door Motor
The mode door motor is attached to the heater & cooling unit assem-
bly. It rot

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