Nissan Titan A60. Manual - part 608

MANUAL A/C IDENTIFICATION TABLE

HAC-115

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL A/C (TYPE 1)]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

DTC/CIRCUIT DIAGNOSIS

MANUAL A/C IDENTIFICATION TABLE

Application Table

INFOID:0000000006164753

Manual A/C Type

Description

Visual Identification

Manual A/C (Type 1)

Two Control Dial System

Manual A/C (Type 2)

Three Control Dial System 

[with variable blower control 

(VBC)]

AWIIA0481ZZ

AWIIA0478ZZ

HAC-116

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL A/C (TYPE 1)]

MODE DOOR MOTOR

MODE DOOR MOTOR

System Description

INFOID:0000000006164754

SYSTEM DESCRIPTION

Component Parts

Mode door control system components are:

• Front air control

• Mode door motor

• Position balanced resistor (PBR) (built into mode door motor)

• Intake sensor

System Operation

The mode door position (vent, B/L, foot, D/F, and defrost) is set by the front air control by means of the mode

door motor. When a mode door position is selected on the front air control, voltage is applied to one circuit of

the mode door motor while ground is applied to the other circuit, causing the mode door motor to rotate. The

direction of rotation is determined by which circuit has voltage applied to it, and which one has ground applied

to it. The front air control monitors the mode door position by measuring the voltage signal on the PBR circuit.

COMPONENT DESCRIPTION

Mode Door Motor 

The mode door motor is attached to the heater & cooling unit assem-

bly. It rotates so that air is discharged from the outlet as indicated by

the front air control. Motor rotation is conveyed to a link which acti-

vates the mode door.

Mode Door Motor Component Function Check

INFOID:0000000006164755

INSPECTION FLOW

1.

CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - DISCHARGE AIR

1. Press each mode switch and press the 

 (DEF) switch. Each position indicator should illuminate.

2. Confirm that discharge air comes out according to the air distribution table. Refer to 

HAC-109, "Discharge

Air Flow"

.

NOTE:

Confirm that the compressor clutch is engaged (visual inspection) and intake door position is at FRESH

 when DEF (

) or D/F (

) is selected.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Go to diagnosis procedure. Refer to 

HAC-116, "Mode Door Motor Diagnosis Procedure"

.

Mode Door Motor Diagnosis Procedure

INFOID:0000000006164756

Regarding Wiring Diagram information, refer to 

HAC-155, "Wiring Diagram - Manual With 2 Control Dial Sys-

tem"

.

SYMPTOM:

• Air outlet does not change.

WJIA0587E

MODE DOOR MOTOR

HAC-117

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL A/C (TYPE 1)]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

• Mode door motor does not operate normally.

1.

CHECK MODE DOOR MOTOR POSITION BALANCED RESISTOR (PBR) FEEDBACK VOLTAGE

1. Turn ignition switch ON.

2. Using CONSULT-III, check "MODE FDBCK" in "DATA MONITOR" mode in "HVAC". Refer to 

HAC-111,

"CONSULT-III Function (HVAC)"

.

3. Observe "MODE FDBCK" voltage while cycling front air control mode switch through all modes.

Is the inspection result normal?

YES

>> • Mode door motor is OK.

• Inspect mode door for mechanical failure. Refer to 

VTL-19, "Removal and Installation"

.

NO

>> GO TO 2.

2.

CHECK MODE DOOR MOTOR CIRCUITS FOR OPEN AND SHORT TO GROUND 

1. Turn ignition switch OFF.

2. Disconnect the front air control harness connector M180 (A) and

the mode door motor harness connector M142 (B).

3. Check continuity between front air control harness connector

M180 (A) terminals 19, 20 and the mode door motor harness

connector M142 (B) terminals 5, 6.

4. Check continuity between front air control harness connector

M180 terminals 19, 20 and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness as necessary.

3.

CHECK FRONT AIR CONTROL FOR MODE DOOR MOTOR POWER AND GROUND 

1. Reconnect front air control harness connector.

2. Turn ignition switch ON.
3. Press the mode switch to the D/F (

) mode. 

4. Check voltage between front air control harness connector

M180 terminal 19 and terminal 20 while pressing the mode
switch to the VENT (

), and then the B/L (

) mode. 

Is the inspection result normal?

YES

>> GO TO 4.

Monitor Item

Condition

Results

MODE FDBCK

Cycle mode switch through all modes, D/F 

(

), VENT (

), B/L (

), and FOOT(

)

Voltage varies between D/F (

) and VENT (

), and 

between VENT (

) and B/L (

).

A

B

Continuity

Connector

Terminal

Connector

Terminal

M180

19

M142

5

Yes

20

6

Connector

Terminal

—

Continuity

M180

19

Ground

No

20

AWIIA0364ZZ

AWIIA0361ZZ

Connector

Terminals

Condition Voltage 

(Approx.)

(+) (-)

M180

19

20

D/F (

) mode to VENT (

) mode

Battery voltage

20

19

VENT (

) mode to B/L (

) mode

Battery voltage

AWIIA0360ZZ

HAC-118

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL A/C (TYPE 1)]

MODE DOOR MOTOR

NO

>> Replace front air control. Refer to 

VTL-8, "Removal and Installation"

.

4.

CHECK MODE DOOR MOTOR PBR CIRCUITS FOR OPEN AND SHORT TO GROUND 

1. Turn ignition switch OFF.

2. Disconnect the front air control harness connectors.

3. Check continuity between front air control harness connector

M180 (C) terminal 3, and M181 (A) terminal 28 and the mode

door motor harness connector M142 (B) terminals 1, 3.

4. Check continuity between front air control harness connector

M180 (C) terminal 3, M181 (A) terminal 28 and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace harness as necessary.

5.

CHECK PBR FEEDBACK SIGNAL CIRCUIT FOR OPEN AND SHORT TO GROUND 

1. Check continuity between front air control harness connector

M180 (A) terminal 7 and mode door motor harness connector

M142 (B) terminal 2.

2. Check continuity between front air control harness connector

M180 terminal 7 and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace harness as necessary.

6.

CHECK FRONT AIR CONTROL FOR 5 VOLT REFERENCE (VREF), VREF RETURN, AND FEEDBACK

SIGNAL 

A and C

B

Continuity

Connector

Terminal

Connector

Terminal

M180 (C)

3

M142

3

Yes

M181 (A)

28

1

Connector

Terminal

—

Continuity

M180 (C)

3

Ground

No

M181 (A)

28

AWIIA0368ZZ

A

B

Continuity

Connector

Terminal

Connector

Terminal

M180

7

M142

2

Yes

AWIIA0371ZZ

Connector

Terminal

—

Continuity

M180

7

Ground

No

AWIIA0370ZZ