Nissan Titan A60. Manual - part 633

BLOWER MOTOR CONTROL SYSTEM

HAC-215

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL A/C (TYPE 2)]

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HAC

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Check continuity between front blower motor harness connector

M62 (B) terminal 1 and variable blower control harness connector

M121 (A) terminal 3.

Is the inspection result normal?

YES

>> GO TO 14.

NO

>> Repair harness or connector.

14.

CHECK VARIABLE BLOWER CONTROL GROUND CIRCUIT

Check continuity between variable blower control harness connector

M121 terminal 4 and ground.

Is the inspection result normal?

YES

>> Replace variable blower control. Refer to 

VTL-22,

"Removal and Installation"

.

NO

>> Repair harness or connector.

Front Blower Motor Component Inspection

INFOID:0000000006164828

COMPONENT INSPECTION 

Check continuity between terminals by supplying 12 volts and

ground to coil side terminals of relay.

Front Blower Motor

1 - 3

: Continuity should exist.

AWIIA0540ZZ

4 - Ground

: Continuity should exist.

AWIIA0541ZZ

WJIA1401E

HAC-216

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL A/C (TYPE 2)]

BLOWER MOTOR CONTROL SYSTEM

Confirm smooth rotation of the blower motor.

• Ensure that there are no foreign particles inside the blower unit.

• Apply 12 volts to terminal 2 and ground to terminal 1 and verify that

the motor operates freely and quietly.

WJIA1508E

MAGNET CLUTCH

HAC-217

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL A/C (TYPE 2)]

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HAC

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MAGNET CLUTCH

System Description

INFOID:0000000006164829

SYSTEM DESCRIPTION

The front air control controls compressor operation based on ambient and intake temperature and a signal

from ECM.

Low Temperature Protection Control

The front air control will turn the compressor ON or OFF as determined by a signal detected by the intake sen-

sor.

When intake air temperature is higher than the preset value, the compressor turns ON. The compressor turns

OFF when intake air temperature is lower than the preset value.

Magnet Clutch Component Function Check

INFOID:0000000006164830

INSPECTION FLOW

1.

CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - MAGNET CLUTCH

1. Turn ignition switch ON.

2. Turn the blower control dial to low speed and press the A/C switch.
3. Rotate mode control dial to vent mode (

).

4. Confirm that the compressor clutch engages (sound or visual inspection). (Discharge air and blower

speed will depend on ambient, in-vehicle and set temperatures.)

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Go to diagnosis procedure. Refer to 

HAC-217, "Magnet Clutch Diagnosis Procedure"

.

Magnet Clutch Diagnosis Procedure

INFOID:0000000006164831

Regarding Wiring Diagram information, refer to 

HAC-232, "Wiring Diagram - Manual With 3 Control Dial Sys-

tem"

.

DIAGNOSTIC PROCEDURE FOR MAGNET CLUTCH

HAC-218

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL A/C (TYPE 2)]

MAGNET CLUTCH

SYMPTOM: Magnet clutch does not engage when A/C switch is ON.

1.

CHECK INTAKE SENSOR CIRCUIT

Check intake sensors. Refer to 

HAC-225, "Intake Sensor Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Check malfunctioning intake sensor. Refer to 

HAC-224, "Intake Sensor Diagnosis Procedure"

.

2.

PERFORM AUTO ACTIVE TEST

Refer to 

PCS-11, "Diagnosis Description"

.

Does magnet clutch operate?

YES

>> •

WITH CONSULT-III

GO TO 5.

•

WITHOUT CONSULT-III

GO TO 6.

NO

>> Check 10A fuse (No. 42, located in IPDM E/R), and GO TO 3.

3.

CHECK CIRCUIT CONTINUITY BETWEEN IPDM E/R AND COMPRESSOR

1. Turn ignition switch OFF.

2. Disconnect IPDM E/R connector and compressor (magnet

clutch) connector.

3. Check continuity between IPDM E/R harness connector E119

terminal 11 and A/C compressor harness connector F3 terminal

1.

4. Check continuity between IPDM E/R harness connector E119

terminal 11 and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair harness or connector.

WJIA1392E

11 – 1

: Continuity should exist.

11 – ground

: Continuity should not exist.

WJIA0560E