2004 INFINITI FX35 clutch

ATC-62
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
CHECKING RECIRCULATION
1. Press recirculation (REC) switch one time. Recirculation indica-
tor should illuminate.
2. Press fresh (FRE) switch one time. Fresh indicator should illumi-
nate.
3. Listen for intake door position change (you should hear blower
sound change slightly).
If NG, go to trouble diagnosis procedure for AT C - 7 6 , "
Intake Door
Motor Circuit" .
If OK, continue the check.
NOTE:
Confirm that the compressor clutch is engaged (sound or visual
inspection) and intake door position is at FRESH when the DEF or D/F is selected.
CHECKING TEMPERATURE DECREASE
1. Press temperature (DOWN) switch (driver side) until 18°C
(60°F) is displayed.
2. Check for cold air at discharge air outlets.
If NG, go to trouble diagnosis procedure for AT C - 9 1 , "
Insufficient
Cooling" .
If OK, continue the check.
CHECKING TEMPERATURE INCREASE
1. Press temperature (UP) switch (driver side) until 32°C (90°F) is
displayed.
2. Check for hot air at discharge air outlets.
If NG, go to trouble diagnosis procedure for ATC-100, "
Insufficient
Heating" .
If OK, continue the check.
CHECK A/C SWITCH
1. Press AUTO switch and A/C switch.
2. A/C switch indicator will turn ON.

Confirm that the compressor clutch engages (sound or visual
inspection).
If NG, go to trouble diagnosis procedure for AT C - 8 4 , "
Magnet Clutch
Circuit" .
If OK, continue the check.
RJIA1978E
RJIA1976E
RJIA1977E
RJIA1975E

TROUBLE DIAGNOSIS
ATC-63
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: 2004 November 2004 FX35/FX45
CHECKING AUTO MODE
1. Press AUTO switch and A/C switch.
2. Display should indicate AUTO.

Confirm that the compressor clutch engages (sound or visual
inspection). (Discharge air and blower speed will depend on
ambient, in-vehicle, and set temperatures.)
If NG, go to trouble diagnosis procedure for AT C - 6 3 , "
Power Supply
and Ground Circuit for Auto Amp." , then if necessary, trouble diag-
nosis procedure for AT C - 8 4 , "
Magnet Clutch Circuit" .
If all operational checks are OK (symptom cannot be duplicated), go
to malfunction Simulation Tests in GI-27, "
How to Perform Efficient
Diagnosis for an Electrical Incident" and perform tests as outlined to
simulate driving conditions environment. If symptom appears, refer
to AT C - 4 2 , "
SYMPTOM TABLE" and perform applicable trouble diagnosis procedures.
Power Supply and Ground Circuit for Auto Amp.AJS001BF
SYMPTOM: A/C system does not come on.
INSPECTION FLOW
RJIA1979E
*1AT C - 6 4 , "DIAGNOSTIC PROCE-
DURE FOR A/C SYSTEM".*2ATC-61, "
Operational Check".*3AV- 7 8 , "Trouble Diagnosis Chart by
Symptom".
*4AV- 8 4 , "
A/C and AV Switch Does Not
Operate".
RJIA1980E

ATC-84
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
Magnet Clutch CircuitAJS0014Y
SYMPTOM: Magnet clutch does not engage.
INSPECTION FLOW
*1ATC-113, "Intake Sensor Circuit".*2ATC-104, "Ambient Sensor Circuit".*3AT C - 5 4 , "FUNCTION CONFIRMA-
TION PROCEDURE", see No. 13.
*4ATC-85, "
DIAGNOSTIC PROCE-
DURE FOR MAGNET CLUTCH".*5ATC-96, "
TROUBLE DIAGNOSIS
FOR UNUSUAL PRESSURE".*6AT C - 6 1 , "
Operational Check".
*7ATC-54, "
FUNCTION CONFIRMA-
TION PROCEDURE", see No. 4 to 6.*8ATC-42, "
SYMPTOM TABLE".
RJIA2002E

TROUBLE DIAGNOSIS
ATC-85
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: 2004 November 2004 FX35/FX45
SYSTEM DESCRIPTION
Unified meter and A/C amp. controls compressor operation by ambient temperature, intake air temperature
and signal from ECM.
Low Temperature Protection Control
Unified meter and A/C amp. will turn the compressor ON or OFF as determined by a signal detected by ambi-
ent sensor and intake sensor.
When ambient temperature is higher than −2°C (28°F), the compres-
sor turns ON. The compressor turns OFF when ambient temperature
is lower than −5°C (23°F).
When intake air temperature is higher than 1°C (34°F), the compres-
sor turns ON. The compressor turns OFF when intake air tempera-
ture is lower than −5°C (23°F).
DIAGNOSTIC PROCEDURE FOR MAGNET CLUTCH
SYMPTOM: Magnet clutch does not engage when A/C switch is ON.
RHA094GB
SJIA0267E
RJIA2003E

ATC-86
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
1. CHECK INTAKE SENSOR CIRCUIT
Check ambient sensor and intake sensor. Refer to AT C - 5 4 , "
FUNCTION CONFIRMATION PROCEDURE" ,
see No. 9 and 11.
OK or NG
OK >> GO TO 2.
NG >>

Malfunctioning ambient sensor: Refer to ATC-104, "Ambient Sensor Circuit" .

Malfunctioning intake sensor: Refer to AT C - 11 3 , "Intake Sensor Circuit" .
2. PERFORM AUTO ACTIVE TEST
Refer to PG-24, "
Auto Active Test" .
Does the magnet clutch operate?
YES >>
WITH CONSULT-II
GO TO 5.

WITHOUT CONSULT-II
GO TO 6.
NO >> Check 10A fuse (No. 79, located in IPDM E/R), and GO TO 3.
3. CHECK CIRCUIT CONTINUITY BETWEEN IPDM E/R AND COMPRESSOR
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector and compressor (magnet
clutch) connector.
3. Check continuity between IPDM E/R harness connector E8 ter-
minal 33 (L) and compressor harness connector F2 terminal 1
(L).
OK or NG
OK >> GO TO 4.
NG >> Repair harness or connector.
4. CHECK MAGNET CLUTCH CIRCUIT
Check for operation sound when applying battery voltage direct cur-
rent to terminal.
OK or NG
OK >> Replace IPDM E/R.
NG >> Replace magnet clutch. Refer to ATC-143, "
Removal
and Installation of Compressor Clutch" .
33 – 1 : Continuity should exist.
RJIA2004E
RJIA2005E

ATC-92
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
*1ATC-54, "FUNCTION CONFIRMA-
TION PROCEDURE", see No. 4 to 6.*2ATC-73, "
Air Mix Door Motor Circuit".*3ATC-95, "Test Reading".
*4ATC-59, "
AUXILIARY MECHA-
NISM: TEMPERATURE SETTING
TRIMMER".*5ATC-54, "
FUNCTION CONFIRMA-
TION PROCEDURE", see No. 13.*6ATC-66, "
LAN System Circuit".
*7ATC-79, "
Blower Motor Circuit".*8ATC-84, "Magnet Clutch Circuit".*9ATC-93, "PERFORMANCE TEST
DIAGNOSIS".
*10ATC-61, "
Operational Check".*11AT C - 5 , "CONTAMINATED REFRIG-
ERANT".*12EM-15, "
Checking Drive Belts"
(VQ35DE) or EM-169, "
Checking
Drive Belts" (VK45DE).
*13EC-472, "
SYSTEM DESCRIPTION"
(VQ35DE) or EC-1142, "
SYSTEM
DESCRIPTION" (VK45DE).

ATC-94
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
*1ATC-143, "Removal and Installation
of Compressor Clutch".*2ATC-79, "
Blower Motor Circuit".*3EM-15, "Checking Drive Belts"
(VQ35DE) or EM-169, "
Checking
Drive Belts" (VK45DE).
RJIA1595E

ATC-102
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
Self-diagnosisAJS00152
SYMPTOM: Self-diagnosis cannot be performed.
INSPECTION FLOW
*1 Compressor Clutch, ATC-143,
"REMOVAL" .*2 Compressor Clutch, ATC-145, "INSTALLATION" .*3AT C - 2 7 , "
Maintenance of Lubricant
Quantity in Compressor".
*4ATC-61, "
Operational Check".*5EM-15, "Checking Drive Belts"
(VQ35DE) or EM-169, "
Checking
Drive Belts" (VK45DE).
*1ATC-63, "
Power Supply and Ground
Circuit for Auto Amp.".*2ATC-104, "
Ambient Sensor Circuit".*3ATC-107, "In-vehicle Sensor Circuit".
*4ATC-110, "
Sunload Sensor Circuit".*5ATC-113, "Intake Sensor Circuit".*6AT C - 7 5 , "Air Mix Door Motor PBR
Circuit".
*7ATC-61, "
Operational Check".*8ATC-42, "SYMPTOM TABLE".
RJIA2014E