Infiniti G35 (V35). Manual — part 107

TROUBLE DIAGNOSIS

ATC-99

C

D

E

F

G

H

I

K

L

M

A

B

ATC

Self-diagnosis

NJS0003O

SYMPTOM: Self-diagnosis cannot be performed.

INSPECTION FLOW

*1

ATC-61, "Power Supply and Ground
Circuit for Auto Amp."

*2

ATC-100, "Ambient Sensor Circuit"

*3

ATC-103, "In-vehicle Sensor Circuit"

*4

ATC-106, "Sunload Sensor Circuit"

*5

ATC-109, "Intake Sensor Circuit"

*6

ATC-73, "Air Mix Door Motor PBR
Circuit"

*7

ATC-60, "Operational Check"

*8

ATC-39, "SYMPTOM TABLE"

RJIA3525E

ATC-100

TROUBLE DIAGNOSIS

Memory Function

NJS0003P

SYMPTOM: Memory function does not operate.

INSPECTION FLOW

Ambient Sensor Circuit

NJS0003Q

COMPONENT DESCRIPTION
Ambient Sensor

The ambient sensor is attached on the ambient sensor bracket. It
detects ambient temperature and converts it into a resistance value
which is then input into the display and A/C auto amp.

*1

ATC-61, "Power Supply and Ground
Circuit for Auto Amp."

*2

ATC-60, "Operational Check"

*3

ATC-52, "FUNCTION CONFIRMA-
TION PROCEDURE"

RJIA3526E

RJIA1868E

TROUBLE DIAGNOSIS

ATC-101

C

D

E

F

G

H

I

K

L

M

A

B

ATC

AMBIENT TEMPERATURE INPUT PROCESS

The display and A/C auto amp. includes a processing circuit for the ambient sensor input. However, when the
temperature detected by the ambient sensor increases quickly, the processing circuit retards the display and
A/C auto amp. function. It only allows the display and A/C auto amp. to recognize an ambient temperature
increase of 0.33

°

C (0.6

°

F) per 100 seconds.

As an example, consider stopping for a few minutes after high speed driving. Although the actual ambient tem-
perature has not changed, the temperature detected by the ambient sensor will increase. This is because the
heat from the engine compartment can radiate to the front grille area, location of the ambient sensor.

DIAGNOSIS PROCEDURE FOR AMBIENT SENSOR

SYMPTOM: Ambient sensor circuit is open or shorted. (21 or

−

21 is

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

1.

CHECK VOLTAGE BETWEEN AMBIENT SENSOR AND GROUND

1.

Disconnect ambient sensor connector.

2.

Turn ignition switch ON.

3.

Check voltage between ambient sensor harness connector E34
terminal 1 and ground.

OK or NG

OK

>> GO TO 2.

NG

>> GO TO 4.

2.

CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT 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 ambient sensor harness connector
E34 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.

RJIA3527E

1 – Ground

: Approx. 5 V

RJIA2017E

2 – 40

: Continuity should exist.

RJIA3528E

ATC-102

TROUBLE DIAGNOSIS

3.

CHECK AMBIENT SENSOR

Refer to

ATC-100, "Ambient 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 ambient sensor.

2. Go to self-diagnosis

ATC-52, "FUNCTION CONFIRMATION PROCEDURE"

and perform self-

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

4.

CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT 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 ambient sensor harness connector
E34 terminal 1 and display and A/C auto amp. harness connec-
tor M31 terminal 19.

4.

Check continuity between ambient sensor harness connector
E34 terminal1 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
Ambient Sensor

After disconnecting ambient sensor connector E34, measure resis-
tance between terminals 1 and 2 at sensor side. Refer to the table
below.

If NG, replace ambient sensor.

1 – 19

: Continuity should exist.

1 – Ground

: Continuity should not exist.

RJIA3529E

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

RJIA1870E