Infiniti Q45. Manual — part 124

TROUBLE DIAGNOSIS

ATC-91

C

D

E

F

G

H

I

K

L

M

A

B

ATC

11.

CHECK REFRIGERANT PRESSURE SENSOR CIRCUIT

Refer to

EC-744, "REFRIGERANT PRESSURE SENSOR"

.

OK or NG

OK

>> INSPECTION END

NG

>> Repair or replace the malfunctioning part(s).

12.

CHECK CIRCUIT CONTINUITY BETWEEN ECM AND AUTO AMP.

1.

Turn ignition switch OFF.

2.

Disconnect ECM connector and auto amp. connector.

3.

Check continuity between ECM harness connector F101 termi-
nal 96 and auto amp. harness connector M120 terminal 29.

OK or NG

OK

>> Replace auto amp.

NG

>> Repair harness or connector.

13.

CHECK CIRCUIT CONTINUITY BETWEEN ECM AND AUTO AMP.

1.

Turn ignition switch OFF.

2.

Disconnect ECM connector and auto amp. connector.

3.

Check continuity between ECM harness connector F101 termi-
nal 110 and auto amp. harness connector M120 terminal 22.

OK or NG

OK

>> Replace auto amp.

NG

>> Repair harness or connector.

14.

CHECK CIRCUIT CONTINUITY BETWEEN ECM AND AUTO AMP.

1.

Turn ignition switch OFF.

2.

Disconnect ECM connector and auto amp. connector.

3.

Check continuity between ECM harness connector F101 termi-
nal 30 and auto amp. harness connector M119 terminal 18.

OK or NG

OK

>> Check ECM.

NG

>> Repair harness or connector.

96 – 29

: Continuity should exist.

RJIA3191E

110 – 22

: Continuity should exist.

RJIA3192E

30 – 18

: Continuity should exist.

RJIA3193E

ATC-92

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 the sensor output
voltage are within the specified range as shown in the A/C operating
condition figure. Refer to

EC-744, "REFRIGERANT PRESSURE

SENSOR"

.

Conditions

Continuity

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

Yes

No current supply

No

SEF090M

RJIA1914E

RJIA2954E

TROUBLE DIAGNOSIS

ATC-93

C

D

E

F

G

H

I

K

L

M

A

B

ATC

Insufficient Cooling

NJS0008N

SYMPTOM: Insufficient cooling

INSPECTION FLOW

SJIA1306E

ATC-94

TROUBLE DIAGNOSIS

*1

ATC-54, "FUNCTION CONFIRMA-
TION PROCEDURE"

, see No. 1.

*2

ATC-73, "Air Mix Door Motor Circuit"

*3

ATC-97, "Test Reading"

*4

ATC-61, "AUXILIARY MECHANISM:
TEMPERATURE SETTING TRIM-
MER"

*5

ATC-54, "FUNCTION CONFIRMA-
TION PROCEDURE"

, see No. 14.

*6

ATC-66, "LAN System Circuit"

*7

ATC-81, "Blower Motor Circuit"

*8

ATC-86, "Magnet Clutch Circuit"

*9

ATC-95, "PERFORMANCE TEST
DIAGNOSIS"

*10

ATC-62, "Operational Check"

*11

ATC-54, "FUNCTION CONFIRMA-
TION PROCEDURE"

, see No. 5 to 7.

*12

ATC-6, "CONTAMINATED REFRIG-
ERANT"

*13

EM-14, "Checking Drive Belts"

*14

EC-514, "SYSTEM DESCRIPTION"