2003 NISSAN X-TRAIL Electronic Repair Manual

Page 649 of 3066

NISSAN X-TRAIL 2003  Electronic Repair Manual TROUBLE DIAGNOSIS
ATC-71
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AT C
1.CHECK POWER SUPPLY FOR BLOWER MOTOR
Disconnect blower motor harness connector.
OK or NG
OK >> GO TO 2.
NG >> Check power supply circuit and 15A f

Page 650 of 3066

NISSAN X-TRAIL 2003  Electronic Repair Manual ATC-72
TROUBLE DIAGNOSIS
5.CHECK BODY GROUND CIRCUIT FOR FAN CONTROL AMP.
OK or NG
OK >> GO TO 6.
NG >> Repair harness or connector.
6.CHECK FOR AUTO AMP. OUTPUT
Reconnect the fan control amp. harness

Page 651 of 3066

NISSAN X-TRAIL 2003  Electronic Repair Manual TROUBLE DIAGNOSIS
ATC-73
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AT C
8.CHECK FAN CONTROL AMP.
Disconnect the fan control amp. harness connector.
OK or NG
OK >> GO TO 9.
NG >> Replace fan control amp.
9.CHECK CIRCUIT

Page 652 of 3066

NISSAN X-TRAIL 2003  Electronic Repair Manual ATC-74
TROUBLE DIAGNOSIS
INSPECTION FLOW
SYSTEM DESCRIPTION
Auto amplifier controls compressor operation by ambient temperature and signal from ECM.
*1 Self-diagnosisAT C - 4 2, see No.1. *6 Self-diag

Page 653 of 3066

NISSAN X-TRAIL 2003  Electronic Repair Manual TROUBLE DIAGNOSIS
ATC-75
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AT C
Low Temperature Protection Control (With Gasoline Engine)
Auto amplifier will turn the compressor ON or OFF as determined by
a signal detected by a

Page 654 of 3066

NISSAN X-TRAIL 2003  Electronic Repair Manual ATC-76
TROUBLE DIAGNOSIS
1.CHECK POWER SUPPLY FOR COMPRESSOR
Disconnect compressor harness connector.
OK or NG
OK >> Check magnet clutch coil.
1. If NG, replace magnet clutch. Refer toATC-129,
"Remova

Page 655 of 3066

NISSAN X-TRAIL 2003  Electronic Repair Manual TROUBLE DIAGNOSIS
ATC-77
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AT C
4.CHECK A/C RELAY AFTER DISCONNECTING IT
Refer toAT C - 8 0 , "
A/C Relay".
OK or NG
OK >>ReconnectA/Crelay.AndGOTO5.
NG >> 1. replace A/C relay.
2

Page 656 of 3066

NISSAN X-TRAIL 2003  Electronic Repair Manual ATC-78
TROUBLE DIAGNOSIS
9.CHECK VOLTAGE FOR AUTO AMP. (COMPRESSOR FEED BACK SIGNAL)
OK or NG
OK >> GO TO 10.
NG >> GO TO 13.
10.CHECK VOLTAGE FOR AUTO AMP. (FAN ON SIGNAL)
OK or NG
OK >> Replace auto