Nissan Frontier D22. Manual — part 828

MTC-34

TROUBLE DIAGNOSIS

Intake Door

EJS00208

TROUBLE DIAGNOSIS PROCEDURE FOR INTAKE DOOR

Symptom:

●

Intake door position does not change in VENT, B/L or FOOT mode.

Inspection Flow

WHA326

*1:

MTC-36

*2:

MTC-30

*3:

MTC-22

TROUBLE DIAGNOSIS

MTC-35

C

D

E

F

G

H

I

K

L

M

A

B

MTC

INTAKE DOOR CIRCUIT

SYMPTOM:

●

Intake door does not operate.

1.

CHECK POWER FOR INTAKE DOOR MOTOR

1.

Disconnect intake door motor harness connector.

2.

Turn ignition switch ON.

3.

Check voltage between intake door motor harness connector M96 terminals + (Y/B), – (Y) and ground as
shown.

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 2.

2.

CHECK INTAKE DOOR CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect air control harness connector.

3.

Check continuity between air control harness connector M95 terminals 3 (Y/B), 11 (Y) and intake door
motor harness connector M96 terminals + (Y/B), – (Y).

NOTE:

Mode control knob should be in

position.

OK or NG

OK

>> Check harness for short.

NG

>> Replace air control.

LHA268

WHA312

MTC-36

TROUBLE DIAGNOSIS

3.

CHECK INTAKE DOOR MOTOR

1.

Reconnect intake door motor connector M96.

2.

Turn ignition switch ON.

3.

Observe intake door operation when the RECIRC switch is turned ON and OFF.

4.

Intake door should change position.

OK or NG

OK

>> Check harness and connectors for open or short.

NG

>> Replace intake door motor.

CONTROL LINKAGE ADJUSTMENT
Intake Door Motor

1.

Install intake door motor on intake unit.
Ensure that the intake door motor lever is fitted into the slit por-
tion of the intake door link.

2.

Connect the intake door motor harness connector before install-
ing the intake door motor.

3.

Turn ignition switch on and press the recirculation switch.

4.

Turn the mode control knob to VENT, B/L or FOOT mode.

5.

Check that intake door motor operates properly when RECIR-
CULATION switch is turned ON and OFF.

AHA523A

AHA523A

TROUBLE DIAGNOSIS

MTC-37

C

D

E

F

G

H

I

K

L

M

A

B

MTC

Blower Motor

EJS00209

TROUBLE DIAGNOSIS PROCEDURE FOR BLOWER MOTOR

Symptom:

●

Blower motor does not rotate.

Inspection Flow

BLOWER MOTOR CIRCUIT

SYMPTOM:

●

Blower motor does not rotate.

1.

DIAGNOSTIC PROCEDURE

Check if blower motor rotates properly at each fan speed.

Does not rotate at any speed>>GO TO 2.
Does not rotate at 1-3 speed>>GO TO 6.
Does not rotate at 4 speed>>GO TO 7.

2.

CHECK FUSES

Check 15A fuse [No. 19, located in the fuse block (J/B)] and 15A fuse [No. 24, located in the fuse block (J/B)].
For fuse layout, refer to

PG-9, "POWER SUPPLY ROUTING"

.

Are fuses OK?

YES

>> GO TO 3.

NO

>> GO TO 9.

WHA323

*1:

MTC-37

*2:

MTC-30

*3:

MTC-22