Nissan Titan A60. Manual - part 593

 

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Nissan Titan A60. Manual - part 593

 

 

WATER VALVE CIRCUIT

HAC-55

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

3.

CHECK WATER VALVE POWER AND GROUND CIRCUITS

1. Rotate temperature control dial (driver) to 18

°C (60°F).

2. Check voltage between water valve harness connector F68 ter-

minal 1 and terminal 2 while rotating temperature control dial

(driver) to 32

°C (90°F). 

Is the inspection result normal?

YES

>>  Replace the water valve. 

NO

>> GO TO 4.

4.

CHECK WATER VALVE CONTROL OUTPUT CIRCUIT 

1. Turn ignition switch OFF.

2. Disconnect front air control connector M50.

3. Check continuity between water valve harness connector F68

(A) terminal 1 and front air control harness connector M50 (B)

terminal 41.

4. Check continuity between water valve harness connector F68

(A) terminal 1 and ground.

Is the inspection result normal?

YES

>> Replace front air control. Refer to 

VTL-8, "Removal and Installation"

.

NO

>> Repair harness or connector.

Connector

Terminals

Condition 

Voltage 

(Approx.)

(+) (-)

Water valve: F68

1 

2

Rotate temperature 

control dial

Battery 
voltage

WJIA1792E

1 - 41

: Continuity should exist.

1 - Ground

: Continuity should not exist.

AWIIA0421ZZ

HAC-56

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

AMBIENT SENSOR

AMBIENT SENSOR

Component Description

INFOID:0000000006164708

COMPONENT DESCRIPTION

Ambient Sensor

The ambient sensor (1) is attached on the radiator core support (left

side). It detects ambient temperature and converts it into a value

which is then input into the front air control.

AMBIENT TEMPERATURE INPUT PROCESS

The front air control includes a processing circuit for the ambient sensor input. However, when the tempera-

ture detected by the ambient sensor increases quickly, the processing circuit retards the front air control func-

tion. It only allows the front air control to recognize an ambient temperature increase of 0.33

°C (0.6°F) per 100

seconds.

This prevents constant adjustments due to momentary conditions, such as stopping after high speed driving.

Although the actual ambient temperature 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, loca-

tion of the ambient sensor.

Ambient Sensor Diagnosis Procedure

INFOID:0000000006164709

Regarding Wiring Diagram information, refer to 

HAC-71, "Wiring Diagram - Automatic Air Conditioner"

.

DIAGNOSTIC PROCEDURE FOR AMBIENT SENSOR

SYMPTOM: Ambient sensor circuit is open or shorted. Using the

Consult-III, DTC B257B or B257C is displayed. Without Consult-III,

code 40 or 41 is indicated on front air control as a result of conduct-

ing the front air control self-diagnosis.

1.

CHECK VOLTAGE BETWEEN AMBIENT SENSOR AND GROUND

AWIIA1074ZZ

AWIIA0422GB

AMBIENT SENSOR

HAC-57

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

1. Disconnect ambient sensor connector.

2. Turn ignition switch ON.

3. Check voltage between ambient sensor harness connector E1

terminal 1 and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 4.

2.

CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT SENSOR AND FRONT AIR CONTROL 

1. Turn ignition switch OFF.

2. Disconnect front air control connector.

3. Check continuity between ambient sensor harness connector

E1 (B) terminal 2 and front air control harness connector M49

(A) terminal 26.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK AMBIENT SENSOR

Check the ambient sensor circuit. Refer to 

HAC-57, "Ambient Sensor Component Inspection"

.

Is the inspection result normal?

YES

>> 1. Replace front air control. Refer to 

VTL-8, "Removal and Installation"

.

2. GO TO 

HAC-21, "Front Air Control Self-Diagnosis"

 and perform self-diagnosis.

NO

>> 1. Replace ambient sensor. Refer to 

HA-45, "Removal and Installation"

.

2. GO TO 

HAC-21, "Front Air Control Self-Diagnosis"

 and perform self-diagnosis.

4.

CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT SENSOR AND FRONT AIR CONTROL

1. Turn ignition switch OFF.

2. Disconnect front air control connector.

3. Check continuity between ambient sensor harness connector

E1 (B) terminal 1 and front air control harness connector M49

(A) terminal 25.

4. Check continuity between ambient sensor harness connector

E1 (B) terminal 2 and ground.

Is the inspection result normal?

YES

>> 1. Replace front air control. Refer to 

VTL-8, "Removal and Installation"

.

2. GO TO 

HAC-21, "Front Air Control Self-Diagnosis"

 and perform self-diagnosis.

NO

>> Repair harness or connector.

Ambient Sensor Component Inspection

INFOID:0000000006164710

COMPONENT INSPECTION

Ambient Sensor

1 - Ground

: Approx. 5V

AWIIA0161ZZ

2 - 26

: Continuity should exist.

AWIIA1039ZZ

1 - 25

: Continuity should exist.

1 - Ground

: Continuity should not exist.

AWIIA1040ZZ

HAC-58

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

AMBIENT SENSOR

After disconnecting ambient sensor (1) connector E1, measure

resistance between terminals 1 and 2 at sensor component side,

using the table below.

If NG, replace ambient sensor. Refer to 

HA-45, "Removal and Instal-

lation"

.

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

AWIIA1080ZZ

 

 

 

 

 

 

 

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