Nissan Titan A60. Manual - part 592

 

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Nissan Titan A60. Manual - part 592

 

 

MAGNET CLUTCH

HAC-51

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

NO

>> Repair harness or connector.

4.

CHECK MAGNET CLUTCH CIRCUIT

Check for operation sound when applying battery voltage direct cur-

rent to terminal.
Is the inspection result normal?

YES

>> Replace IPDM E/R. Refer to 

PCS-28, "Removal and

Installation of IPDM E/R"

.

NO

>> Replace magnet clutch. Refer to 

HA-33, "Removal and

Installation for Compressor Clutch"

.

5.

CHECK BCM INPUT (COMPRESSOR ON) SIGNAL

Check compressor ON/OFF signal. Refer to 

HAC-19, "CONSULT-III Function (BCM - AIR CONDITIONER)"

.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> GO TO 6.

6.

CHECK CIRCUIT CONTINUITY BETWEEN BCM AND FRONT AIR CONTROL

1. Turn ignition switch OFF.

2. Disconnect BCM connector and front air control connector.

3. Check continuity between BCM harness connector M18 (A) ter-

minal 27 and front air control harness connector M49 (B) termi-

nal 4.

4. Check continuity between BCM harness connector M18 (A) ter-

minal 27 and ground.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Repair harness or connector.

7.

CHECK VOLTAGE FOR FRONT AIR CONTROL (A/C COMPRESSOR ON SIGNAL)

1. Reconnect BCM connector and front air control connector.

2. Turn ignition switch ON.

3. Check voltage between front air control harness connector M49

terminal 4 and ground.

Is the inspection result normal?

YES

>> GO TO 8.

SJIA0197E

A/C SWITCH ON

:AIR COND SW ON

A/C SWITCH OFF

:AIR COND SW OFF

27 - 4

Continuity should exist.

27 - ground

Continuity should not exist.

AWIIA0416ZZ

Terminals

Condition

Voltage

(+)

(-)

Front air con-

trol connec-

tor

Terminal No.

M49

4

Ground

A/C switch: ON

Approx. 0V

A/C switch: OFF

Approx. 5V

AWIIA0417ZZ

HAC-52

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

MAGNET CLUTCH

NO-1 >> If the voltage is approx. 5V when A/C switch is ON, replace front air control Refer to 

VTL-8,

"Removal and Installation"

.

NO-2 >> If the voltage is approx. 0V when A/C switch is OFF, replace BCM. Refer to 

BCS-53, "Removal

and Installation"

.

8.

CHECK REFRIGERANT PRESSURE SENSOR

1. Start engine.

2. Check voltage between ECM harness connector F54 terminal

70 and ground.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Refer to 

EC-465, "Diagnosis Procedure"

.

9.

CHECK BCM INPUT (FAN ON) SIGNAL

Check FAN ON/OFF signal. Refer to 

HAC-19, "CONSULT-III Function (BCM - AIR CONDITIONER)"

.

Is the inspection result normal?

YES

>> GO TO 12.

NO

>> GO TO 10.

10.

CHECK CIRCUIT CONTINUITY BETWEEN BCM AND FRONT AIR CONTROL

1. Turn ignition switch OFF.

2. Disconnect BCM connector and front air control connector.

3. Check continuity between BCM harness connector M18 (A) ter-

minal 28 and front air control harness connector M49 (B) termi-

nal 5.

4. Check continuity between BCM harness connector M18 (A) ter-

minal 28 and ground.

Is the inspection result normal?

YES

>> GO TO 11.

NO

>> Repair harness or connector.

11.

CHECK VOLTAGE FOR FRONT AIR CONTROL (FAN ON SIGNAL)

Terminals

Condition

Voltage

(+)

(-)

ECM con-

nector

Terminal No.

F54

70

Ground

A/C switch: ON

Approx. 0.36 - 3.88V

LJIA0124E

FRONT BLOWER CONTROL 
DIAL ON

: FAN ON SIG ON

FRONT BLOWER CONTROL 
DIAL OFF

: FAN ON SIG OFF

28 - 5

Continuity should exist.

28 - ground

Continuity should not exist.

AWIIA0418ZZ

MAGNET CLUTCH

HAC-53

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

1. Reconnect BCM connector and front air control connector.

2. Turn ignition switch ON.

3. Check voltage between front air control harness connector M49

terminal 5 and ground.

Is the inspection result normal?

YES

>> GO TO 12.

NO-1 >> If the voltage is approx. 5V when blower motor is ON, replace front air control. Refer to 

VTL-8,

"Removal and Installation"

.

NO-2 >> If the voltage is approx. 0V when blower motor is OFF, replace BCM. Refer to 

BCS-53, "Removal

and Installation"

.

12.

CHECK CAN COMMUNICATION

Check CAN communication. Refer to 

LAN-4, "System Description"

.

• BCM  –  ECM

• ECM – IPDM E/R

• ECM – Front air control
Is the inspection result normal?

YES

>> Replace IPDM E/R. Refer to 

PCS-28, "Removal and Installation of IPDM E/R"

.

NO

>> Repair or replace malfunctioning part(s).

Terminals

Condition

Voltage

(+)

(-)

Front air con-

trol connector

Terminal No.

M49

5

Ground

A/C switch: ON
Blower motor 
operates

Approx. 0V

A/C switch: OFF

Approx. 5V

AWIIA0419ZZ

HAC-54

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

WATER VALVE CIRCUIT

WATER VALVE CIRCUIT

Description

INFOID:0000000006164706

COMPONENT DESCRIPTION

Water Valve

The water valve (1) cuts the flow of engine coolant to the heater core

to allow for maximum cooling during A/C operation. It is controlled by

the front air control.

Water Valve Diagnosis Procedure

INFOID:0000000006164707

Regarding Wiring Diagram information, refer to 

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

.

DIAGNOSTIC PROCEDURE FOR WATER VALVE

1.

CHECK WATER VALVE POWER AND GROUND CIRCUITS

1. Disconnect water valve connector F68.

2. Turn ignition switch ON.

3. Rotate temperature control dial (driver) to 32

°C (90°F).

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

minal 1 and terminal 2 while rotating temperature control dial

(driver) to 18

°C (60°F). 

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

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 2 and front air control harness connector M50 (B)

terminal 42.

4. Check continuity between water valve harness connector F68

terminal 2 and ground.

Is the inspection result normal?

YES

>> Replace front air control. Refer to 

VTL-8, "Removal and Installation"

.

NO

>> Repair harness or connector.

WJIA1791E

Connector

Terminals

Condition 

Voltage 

(Approx.)

(+) (-)

Water valve: F68

1

Rotate temperature 

control dial

Battery 
voltage

WJIA1794E

2 - 42

: Continuity should exist.

2 - Ground

: Continuity should not exist.

AWIIA0420ZZ

 

 

 

 

 

 

 

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