Infiniti FX35 / FX45. Manual - part 124

 

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Infiniti FX35 / FX45. Manual - part 124

 

 

ATC-92

< SERVICE INFORMATION >

TROUBLE DIAGNOSIS

SYMPTOM: Sunload sensor circuit is open or shorted. (25 or 

25 is

indicated on unified meter and A/C amp. as a result of performing
self-diagnosis STEP-2.)

1.

CHECK VOLTAGE BETWEEN SUNLOAD SENSOR AND GROUND

1.

Disconnect sunload sensor connector.

2.

Turn ignition switch ON.

3.

Check voltage between sunload sensor harness connector M87
terminal 1 and ground.

OK or NG

OK

>> GO TO 2.

NG

>> GO TO 4.

2.

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

1.

Turn ignition switch OFF.

2.

Disconnect unified meter and A/C amp. connector.

3.

Check continuity between sunload sensor harness connector
M87 terminal 2 and unified meter and A/C amp. harness con-
nector M57 terminal 49.

OK or NG

OK

>> GO TO 3.

NG

>> Repair harness or connector.

3.

CHECK SUNLOAD SENSOR

1.

Reconnect sunload sensor connector and unified meter and A/C amp. connector.

2.

Refer to "Sunload Sensor".

OK or NG

OK

>> 1.

Replace unified meter and A/C amp.

2.

Go to self-diagnosis 

ATC-43, "Self-Diagnosis Function"

 and perform self-diagnosis STEP-2.

Confirm that code No. 20 is displayed.

NG

>> 1.

Replace sunload sensor.

2.

Go to self-diagnosis 

ATC-43, "Self-Diagnosis Function"

 and perform self-diagnosis STEP-2.

Confirm that code No. 20 is displayed.

4.

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

1.

Turn ignition switch OFF.

2.

Disconnect unified meter and A/C amp. connector.

RJIA1455E

1 – Ground

: Approx. 5 V

RJIA2027E

2 – 49

: Continuity should exist.

RJIA2028E

TROUBLE DIAGNOSIS

ATC-93

< SERVICE INFORMATION >

C

D

E

F

G

H

I

K

L

M

A

B

ATC

N

O

P

3.

Check continuity between sunload sensor harness connector
M87 terminal 1 and unified meter and A/C amp. harness con-
nector M57 terminal 50.

4.

Check continuity between sunload sensor harness connector
M87 terminal 1 and ground.

OK or NG

OK

>> 1.

Replace unified meter and A/C amp.

2.

Go to self-diagnosis 

ATC-43, "Self-Diagnosis Function"

 and perform self-diagnosis STEP-2.

Confirm that code No. 20 is displayed.

NG

>> Repair harness or connector.

COMPONENT INSPECTION

Sunload Sensor

Measure voltage between unified meter and A/C amp. harness con-
nector M57 terminal 50 and ground.

1 – 50

: Continuity should exist.

1 – Ground

: Continuity should not exist.

RJIA2029E

RJIA2030E

ATC-94

< SERVICE INFORMATION >

TROUBLE DIAGNOSIS

• When checking sunload sensor, select a place where sunshine directly on it.

If NG, replace sunload sensor.

Intake Sensor Circuit

INFOID:0000000001328199

COMPONENT DESCRIPTION

Intake Sensor

The intake sensor is located on the heater & cooling unit assembly. It
converts temperature of air after it passes through the evaporator
into a resistance value which is then input to the unified meter and A/
C amp.

DIAGNOSIS PROCEDURE FOR INTAKE SENSOR

SYMPTOM: Intake sensor circuit is open or shorted. (24 or 

24 is

indicated on unified meter and A/C amp. as a result of performing
self-diagnosis STEP-2.)

1.

CHECK VOLTAGE BETWEEN INTAKE SENSOR AND GROUND

1.

Disconnect intake sensor connector.

2.

Turn ignition switch ON.

SHA930E

RJIA0928E

RJIA1458E

TROUBLE DIAGNOSIS

ATC-95

< SERVICE INFORMATION >

C

D

E

F

G

H

I

K

L

M

A

B

ATC

N

O

P

3.

Check voltage between intake sensor harness connector M254
terminal 2 and ground.

OK or NG

OK

>> GO TO 2.

NG

>> GO TO 4.

2.

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

1.

Turn ignition switch OFF.

2.

Disconnect unified meter and A/C amp. connector.

3.

Check continuity between intake sensor harness connector
M254 terminal 1 and unified meter and A/C amp. harness con-
nector M57 terminal 49.

OK or NG

OK

>> GO TO 3.

NG

>> Repair harness or connector.

3.

CHECK INTAKE SENSOR

Refer to "Intake Sensor".

OK or NG

OK

>> 1.

Replace unified meter and A/C amp.

2.

Go to self-diagnosis 

ATC-43, "Self-Diagnosis Function"

 and perform self-diagnosis STEP-2.

Confirm that code No. 20 is displayed.

NG

>> 1.

Replace intake sensor.

2.

Go to self-diagnosis 

ATC-43, "Self-Diagnosis Function"

 and perform self-diagnosis STEP-2.

Confirm that code No. 20 is displayed.

4.

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

1.

Turn ignition switch OFF.

2.

Disconnect unified meter and A/C amp. connector.

3.

Check continuity between intake sensor harness connector
M254 terminal 2 and unified meter and A/C amp. harness con-
nector M57 terminal 41.

4.

Check continuity between intake sensor harness connector
M254 terminal 2 and ground.

OK or NG

OK

>> 1.

Replace unified meter and A/C amp.

2.

Go to self-diagnosis 

ATC-43, "Self-Diagnosis Function"

 and perform self-diagnosis STEP-2.

Confirm that code No. 20 is displayed.

NG

>> Repair harness or connector.

COMPONENT INSPECTION

Intake Sensor

2 – Ground

: Approx. 5 V

RJIA2031E

1 – 49

: Continuity should exist.

RJIA2032E

2 – 41

: Continuity should exist.

2 – Ground

: Continuity should not exist.

RJIA2033E

 

 

 

 

 

 

 

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