Infiniti M35/M45 Y50. Manual — part 139

TROUBLE DIAGNOSIS

ATC-107

C

D

E

F

G

H

I

K

L

M

A

B

ATC

2.

CHECK ECV CONTROL SIGNAL

1.

Turn ignition switch OFF.

2.

Reconnect compressor (ECV) connector.

3.

Perform self-diagnosis. Refer to

ATC-56, "Self-diagnosis Func-

tion"

.

4.

Set in self-diagnosis STEP-4 (Code No. 45). Refer to

ATC-57,

"FUNCTION CONFIRMATION PROCEDURE"

.

5.

Confirm ECV control signal between unified meter and A/C amp.
harness connector M65 terminal 65 and ground using an oscillo-
scope.

OK or NG

OK

>> Replace compressor.

NG

>> GO TO 3.

3.

CHECK CIRCUIT CONTINUITY BETWEEN ECV AND UNIFIED METER AND A/C AMP.

1.

Turn ignition switch OFF.

2.

Disconnect compressor (ECV) and unified meter and A/C amp.
connector.

3.

Check continuity between compressor (ECV) harness connector
F34 terminal 3 and unified meter and A/C amp. harness connec-
tor M65 terminal 65.

OK or NG

OK

>> GO TO 4.

NG

>> Repair harness or connector.

4.

CHECK ECV

Check continuity between compressor (ECV) connector F34 termi-
nals 2 and 3.

OK or NG

OK

>> Replace unified meter and A/C amp.

NG

>> Replace compressor.

RJIA4082E

SJIA1765E

3 – 65

: Continuity should exist.

RJIA4083E

2 – 3

: Continuity should exist.

RJIA3523E

ATC-108

TROUBLE DIAGNOSIS

Insufficient Heating

NJS000GW

SYMPTOM: Insufficient heating

INSPECTION FLOW

*1

ATC-65, "Operational Check"

*2

ATC-82, "Air Mix Door Motor Circuit"

*3

ATC-57, "FUNCTION CONFIRMA-
TION PROCEDURE"

, see No. 2 to

6.

*4

ATC-57, "FUNCTION CONFIRMA-
TION PROCEDURE"

, see No. 13.

*5

ATC-71, "LAN System Circuit"

*6

ATC-88, "Blower Motor Circuit"

*7

EC-214, "DTC P0117, P0118 ECT
SENSOR"

(VQ35DE) or

EC-926,

"DTC P0117, P0118 ECT SEN-
SOR"

(VK45DE)

*8

CO-11, "Changing Engine Coolant"

(VQ35DE) or

CO-40, "Changing

Engine Coolant"

(VK45DE)

*9

CO-16, "Checking Radiator Cap"

(VQ35DE) or

CO-45, "Checking

Radiator Cap"

(VK45DE)

RJIA4084E

TROUBLE DIAGNOSIS

ATC-109

C

D

E

F

G

H

I

K

L

M

A

B

ATC

Noise

NJS000GX

SYMPTOM: Noise

INSPECTION FLOW

SJIA0843E

ATC-110

TROUBLE DIAGNOSIS

Self-diagnosis

NJS000GY

SYMPTOM: Self-diagnosis cannot be performed.

INSPECTION FLOW

*1

ATC-65, "Operational Check"

*2

ATC-156, "Check Disc to Pulley
Clearance"

*3

ATC-26, "Maintenance of Lubricant
Quantity in Compressor"

*4

EM-16, "Checking Drive Belts"

(VQ35DE) or

EM-174, "Checking

Drive Belts"

(VK45DE)

*1

ATC-65, "Operational Check"

*2

ATC-67, "Power Supply and Ground
Circuit for Auto Amp."

*3

ATC-41, "SYMPTOM TABLE"

SJIA1796E