Infiniti Q45. Manual - part 129

TROUBLE DIAGNOSIS

ATC-111

C

D

E

F

G

H

I

K

L

M

A

B

ATC

2. 

CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT SENSOR AND AUTO AMP.

1.

Turn ignition switch OFF.

2.

Disconnect auto amp. connector.

3.

Check continuity between ambient sensor harness connector
E58 terminal 2 and auto amp. harness connector M119 terminal
11.

OK or NG

OK

>> GO TO 3.

NG

>> Repair harness or connector.

3. 

CHECK AMBIENT SENSOR

Refer to 

ATC-112, "Ambient Sensor"

 .

OK or NG

OK

>> 1. Replace auto amp.

2. Go to self-diagnosis 

ATC-54, "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-54, "FUNCTION CONFIRMATION PROCEDURE"

  and perform self-

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

4. 

CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT SENSOR AND AUTO AMP.

1.

Turn ignition switch OFF.

2.

Disconnect auto amp. connector.

3.

Check continuity between ambient sensor harness connector
E58 terminal 1 and auto amp. harness connector M119 terminal
2.

4.

Check continuity between auto amp. harness connector M119
terminal 2 and ground.

OK or NG

OK

>> 1. Replace auto amp.

2. Go to self-diagnosis 

ATC-54, "FUNCTION CONFIRMATION PROCEDURE"

  and perform self-

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

NG

>> Repair harness or connector.

2 – 11

: Continuity should exist.

RJIA3057E

1 – 2

: Continuity should exist.

2 – Ground

: Continuity should not exist.

RJIA3058E

ATC-112

TROUBLE DIAGNOSIS

COMPONENT INSPECTION
Ambient Sensor

After disconnecting ambient sensor connector E58, measure resis-
tance between terminals 1 and 2 at sensor side, using the table
below.

If NG, replace ambient sensor.

In-Vehicle Sensor Circuit

NJS0008W

COMPONENT DESCRIPTION
In-vehicle Sensor

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

Aspirator

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

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

RJIA3202E

RJIA0248E

RJIA0249E

TROUBLE DIAGNOSIS

ATC-113

C

D

E

F

G

H

I

K

L

M

A

B

ATC

DIAGNOSIS PROCEDURE FOR IN-VEHICLE SENSOR

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

−

22 is

indicated on 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
M68 terminal 2 and ground.

OK or NG

OK

>> GO TO 2.

NG

>> GO TO 4.

2. 

CHECK CIRCUIT CONTINUITY BETWEEN IN-VEHICLE SENSOR AND AUTO AMP.

1.

Turn ignition switch OFF.

2.

Disconnect auto amp. connector.

3.

Check continuity between in-vehicle sensor harness connector
M68 terminal 1 and auto amp. harness connector M119 terminal
11.

OK or NG

OK

>> GO TO 3.

NG

>> Repair harness or connector.

RJIA1402E

RHA056GB

2 – Ground

: Approx. 5 V

RJIA3060E

1 – 11

: Continuity should exist.

RJIA3061E

ATC-114

TROUBLE DIAGNOSIS

3. 

CHECK IN-VEHICLE SENSOR

Refer to 

ATC-114, "In-vehicle Sensor"

 .

OK or NG

OK

>> 1. Replace auto amp.

2. Go to self-diagnosis 

ATC-54, "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-54, "FUNCTION CONFIRMATION PROCEDURE"

  and perform self-

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

4. 

CHECK CIRCUIT CONTINUITY BETWEEN IN-VEHICLE SENSOR AND AUTO AMP. 

1.

Turn ignition switch OFF.

2.

Disconnect auto amp. connector.

3.

Check continuity between in-vehicle sensor harness connector
M68 terminal 2 and auto amp. harness connector M119 terminal
3.

4.

Check continuity between auto amp. harness connector M119
terminal 3 and ground.

OK or NG

OK

>> 1. Replace auto amp.

2. Go to self-diagnosis 

ATC-54, "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 M68, measure resis-
tance between terminals 1 and 2 at sensor side, using the table
below.

If NG, replace in-vehicle sensor.

2 – 3

: Continuity should exist.

3 – Ground

: Continuity should not exist.

RJIA3062E

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

RJIA0253E