Infiniti M45 (Y34). Manual — part 150

TROUBLE DIAGNOSIS

ATC-85

C

D

E

F

G

H

I

K

L

M

A

B

ATC

13.

CHECK CIRCUIT CONTINUITY BETWEEN COMBINATION METER AND AUTO AMP.

1.

Turn ignition switch OFF.

2.

Disconnect combination meter and auto amp. connector.

3.

Check continuity between combination meter harness connector
M41 terminal 27 (Y/B) and auto amp. harness connector M120
terminal 22 (Y/B).

OK or NG

OK

>> Replace auto amp.

NG

>> Repair harness or connector.

14.

CHECK CIRCUIT CONTINUITY BETWEEN COMBINATION METER AND AUTO AMP.

1.

Turn ignition switch OFF.

2.

Disconnect combination meter and auto amp. connector.

3.

Check continuity between combination meter harness connector
M42 terminal 43 (OR) and auto amp. harness connector M119
terminal 18 (OR).

OK or NG

OK

>> Check combination meter.

NG

>> Repair harness or connector.

27 – 22

: Continuity should exist.

RJIA1299E

43 – 18

: Continuity should exist.

RJIA1300E

ATC-86

TROUBLE DIAGNOSIS

COMPONENT INSPECTION
A/C Relay

Check continuity between terminal Nos. 3 and 5.

If NG, replace relay.

Refrigerant Pressure Sensor

The refrigerant pressure sensor is attached to the condenser.
Make sure that the A/C refrigerant pressure and sensor output volt-
age are within the specified range as shown in the A/C operating
condition figure. Refer to

EC-680, "REFRIGERANT PRESSURE

SENSOR"

.

Conditions

Continuity

12V direct current supply between terminal Nos. 1 and 2

Yes

No current supply

No

SEF090M

RJIA1914E

RJIA2954E

TROUBLE DIAGNOSIS

ATC-87

C

D

E

F

G

H

I

K

L

M

A

B

ATC

Insufficient Cooling

AJS001EX

SYMPTOM: Insufficient cooling

INSPECTION FLOW

SJIA0460E

ATC-88

TROUBLE DIAGNOSIS

*1

ATC-50, "FUNCTION CONFIRMA-
TION PROCEDURE"

, see No.1.

*2

ATC-69, "Air Mix Door Motor Circuit"

. *3

ATC-91, "Test Reading"

.

*4

ATC-56, "AUXILIARY MECHANISM:
TEMPERATURE SETTING TRIM-
MER"

.

*5

ATC-50, "FUNCTION CONFIRMA-
TION PROCEDURE"

, see No. 14.

*6

ATC-62, "LAN System Circuit"

.

*7

ATC-75, "Blower Motor Circuit"

.

*8

ATC-80, "Magnet Clutch Circuit"

.

*9

ATC-89, "PERFORMANCE TEST
DIAGNOSIS"

.

*10

ATC-57, "Operational Check"

.

*11

ATC-50, "FUNCTION CONFIRMA-
TION PROCEDURE"

, see No. 5 to 7.

*12

ATC-4, "CONTAMINATED
REFRIGERANT"

.

*13

MA-12, "Checking Drive Belts"

.

*14

CO-19, "COOLING FAN"

.