Infiniti G35 (V35). Manual - part 108

 

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Infiniti G35 (V35). Manual - part 108

 

 

TROUBLE DIAGNOSIS

ATC-103

C

D

E

F

G

H

I

K

L

M

A

B

ATC

In-vehicle Sensor Circuit

NJS0003R

COMPONENT DESCRIPTION
In-vehicle Sensor

The in-vehicle sensor is located on instrument driver lower panel. It
converts variations in temperature of compartment air drawn from
the aspirator into a resistance value. It is then input into the display
and A/C auto amp.

Aspirator

The aspirator is located on driver’s side of heater & cooling unit
assembly. It produces vacuum pressure due to air discharged from
the heater & cooling unit, continuously taking compartment air in the
aspirator.

RJIA3756E

RJIA0921E

RJIA1402E

ATC-104

TROUBLE DIAGNOSIS

DIAGNOSIS PROCEDURE FOR IN-VEHICLE SENSOR

SYMPTOM: In-vehicle sensor circuit is open or shorted. (22 or 

−

22 is

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

1. 

CHECK VOLTAGE BETWEEN IN-VEHICLE SENSOR AND GROUND

1.

Disconnect in-vehicle sensor connector.

2.

Turn ignition switch ON.

3.

Check voltage between in-vehicle sensor harness connector
M42 terminal 1 and ground.

OK or NG

OK

>> GO TO 2.

NG

>> GO TO 4.

2. 

CHECK CIRCUIT CONTINUITY BETWEEN IN-VEHICLE SENSOR AND DISPLAY AND A/C AUTO 

AMP.

1.

Turn ignition switch OFF.

2.

Disconnect display and A/C auto amp. connector.

3.

Check continuity between in-vehicle sensor harness connector
M42 terminal 2 and display and A/C auto amp. harness connec-
tor M31 terminal 40.

OK or NG

OK

>> GO TO 3.

NG

>> Repair harness or connector.

3. 

CHECK IN-VEHICLE SENSOR

Refer to 

ATC-103, "In-vehicle Sensor"

 .

OK or NG

OK

>> 1. Replace display and A/C auto amp.

2. Go to self-diagnosis 

ATC-52, "FUNCTION CONFIRMATION PROCEDURE"

  and perform self-

diagnosis STEP-2. Confirm that code No. 20 is displayed.

NG

>> 1. Replace in-vehicle sensor.

2. Go to self-diagnosis 

ATC-52, "FUNCTION CONFIRMATION PROCEDURE"

  and perform self-

diagnosis STEP-2. Confirm that code No. 20 is displayed.

RJIA3530E

1 – Ground

: Approx. 5 V

RJIA2022E

2 – 40

: Continuity should exist.

RJIA3531E

TROUBLE DIAGNOSIS

ATC-105

C

D

E

F

G

H

I

K

L

M

A

B

ATC

4. 

CHECK CIRCUIT CONTINUITY BETWEEN IN-VEHICLE SENSOR AND DISPLAY AND A/C AUTO 

AMP.

1.

Turn ignition switch OFF.

2.

Disconnect display and A/C auto amp. connector.

3.

Check continuity between in-vehicle sensor harness connector
M42 terminal 1 and display and A/C auto amp. harness connec-
tor M31 terminal 18.

4.

Check continuity between in-vehicle sensor harness connector
M42 terminal 1 and ground.

OK or NG

OK

>> 1. Replace display and A/C auto amp.

2. Go to self-diagnosis 

ATC-52, "FUNCTION CONFIRMATION PROCEDURE"

  and perform self-

diagnosis STEP-2. Confirm that code No. 20 is displayed.

NG

>> Repair harness or connector.

COMPONENT INSPECTION
In-vehicle Sensor

After disconnecting in-vehicle sensor connector M42, measure resis-
tance between terminals 1 and 2 at sensor side. Refer to the table
below.

If NG, replace in-vehicle sensor.

1 – 18

: Continuity should exist.

1 – Ground

: Continuity should not exist.

RJIA3532E

Temperature 

°

C (

°

F)

Resistance k

Ω

−

15 (5)

12.73

−

10 (14)

9.92

−

5 (23)

7.80

0 (32)

6.19

5 (41)

4.95

10 (50)

3.99

15 (59)

3.24

20 (68)

2.65

25 (77)

2.19

30 (86)

1.81

35 (95)

1.51

40 (104)

1.27

45 (113)

1.07

RJIA3757E

ATC-106

TROUBLE DIAGNOSIS

Sunload Sensor Circuit

NJS0003S

COMPONENT DESCRIPTION
Sunload Sensor

The sunload sensor is located on the driver’s side defroster grille. It
detects sunload entering through windshield by means of a photo
diode. The sensor converts the sunload into a current value which is
then input into the display and A/C auto amp.

SUNLOAD INPUT PROCESS

The display and A/C auto amp. also includes a processing circuit which averages the variations in detected
sunload over a period of time. This prevents drastic swings in the ATC system operation due to small or quick
variations in detected sunload.
For example, consider driving along a road bordered by an occasional group of large trees. The sunload
detected by the sunload sensor will vary whenever the trees obstruct the sunlight. The processing circuit aver-
ages the detected sunload over a period of time, so that the (insignificant) effect of the trees momentarily
obstructing the sunlight does not cause any change in the ATC system operation. On the other hand, shortly
after entering a long tunnel, the system will recognize the change in sunload, and the system will react accord-
ingly.

DIAGNOSIS PROCEDURE FOR SUNLOAD SENSOR

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

−

25 is

indicated on display and A/C auto 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 M18
terminal 1 and ground.

OK or NG

OK

>> GO TO 2.

NG

>> GO TO 4.

RJIA0925E

RJIA3533E

1 – Ground

: Approx. 5 V

RJIA2027E

 

 

 

 

 

 

 

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