Infiniti F50. Manual - part 146

TROUBLE DIAGNOSIS

ATC-109

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 (R/Y) and auto amp. harness connector M119
terminal 11 (R/Y).

OK or NG

OK

>> GO TO 3.

NG

>> Repair harness or connector.

3. 

CHECK AMBIENT SENSOR

Refer to 

ATC-110, "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 (G/R) and auto amp. harness connector M119
terminal 2 (G/R).

OK or NG

OK

>> 1. Replace auto amp.

2. Go to self-diagnosis 

ATC-54, "FUNCTION CONFIR-

MATION PROCEDURE"

  and perform self-diagnosis

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

NG

>> Repair harness or connector.

2 – 11

: Continuity should exist.

RJIA0245E

1 – 2

: Continuity should exist.

RJIA0246E

ATC-110

TROUBLE DIAGNOSIS

COMPONENT INSPECTION
Ambient Sensor

After disconnecting ambient sensor harness connector, measure
resistance between terminals 2 and 1 at sensor harness side, using
the table below.

If NG, replace ambient sensor.

In-Vehicle Sensor Circuit

EJS001YE

COMPONENT DESCRIPTION
In-Vehicle Sensor

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

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

RJIA0247E

RJIA0248E

RJIA0249E

TROUBLE DIAGNOSIS

ATC-111

C

D

E

F

G

H

I

K

L

M

A

B

ATC

DIAGNOSTIC 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 conducting 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 (LG/B) 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 (R/Y) and auto amp. harness connector M119
terminal 11 (R/Y).

OK or NG

OK

>> GO TO 3.

NG

>> Repair harness or connector.

RHA482A

RHA056GB

2 – Ground

: Approx. 5V

RJIA0250E

1 – 11

: Continuity should exist.

RJIA0251E

ATC-112

TROUBLE DIAGNOSIS

3. 

CHECK IN-VEHICLE SENSOR

Refer to 

ATC-112, "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
E68 terminal 2 (LG/B) and auto amp. harness connector M119
terminal 3 (LG/B).

OK or NG

OK

>> 1. Replace auto amp.

2. Go to self-diagnosis 

ATC-54, "FUNCTION CONFIR-

MATION 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 harness connector, measure
resistance between terminals 1 and 2 at sensor harness side, using
the table below.

If NG, replace in-vehicle sensor.

2 – 3

: Continuity should exist.

RJIA0252E

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