Nissan Titan. Manual - part 402

DIAGNOSIS SYSTEM (BCM)

HAC-113

< SYSTEM DESCRIPTION >

[MANUAL A/C (TYPE 1)]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

Monitor Item [Unit]

Description

IGN ON SW [On/Off]

Indicates condition of ignition switch ON position.

FAN ON SIG [On/Off]

Indicates condition of fan switch.

AIR COND SW [On/Off]

Indicates condition of A/C switch.

HAC-114

< SYSTEM DESCRIPTION >

[MANUAL A/C (TYPE 1)]

SELF-DIAGNOSIS FUNCTION

SELF-DIAGNOSIS FUNCTION

Front Air Control Self-Diagnosis

INFOID:0000000009882513

A/C SYSTEM SELF-DIAGNOSIS FUNCTION 

The self-diagnosis function is built into the front air control to quickly locate the cause of malfunctions.

DESCRIPTION

The self-diagnostic system diagnoses sensors, CAN system, and battery voltage on front air control Refer to

applicable sections (items) for details. Fault codes (if any are present) will be displayed in the ambient temper-

ature display area (if equipped). Refer to 

HAC-114, "Front Air Control Self-Diagnosis Code Chart"

.

SELF-DIAGNOSTIC MODE

1. Rotate the blower control dial counterclockwise to the OFF posi-

tion. 

2. Press the FLOOR/DEF (

) and DEF (

) mode switches

together and release on the front air control. 

3. Press the REC (

) to enter self diagnostic mode.

4. Turn ignition switch OFF to exit out of self-diagnostic mode.

Front Air Control Self-Diagnosis Code Chart

INFOID:0000000009882514

SELF-DIAGNOSTIC CODE CHART

ALIIA0692ZZ

Code No.

Reference page

03

Battery voltage out of range

CHG-4, "Work Flow (With EXP-800 NI or GR8-1200 NI)"

 or 

CHG-7, "Work Flow (Without EXP-800 NI or GR8-1200 NI)"

40

Ambient sensor circuit short

HAC-56, "Ambient Sensor Diagnosis Procedure"

41

Ambient sensor circuit open

56

Intake sensor circuit short

HAC-64, "Intake Sensor Diagnosis Procedure"

57

Intake sensor circuit open

80

CAN bus fault

LAN-14, "Trouble Diagnosis Flow Chart"

90

Stuck button

VTL-8, "Removal and Installation"

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:0000000009882515

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)]

ALIIA0692ZZ

AWIIA0478ZZ

HAC-116

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL A/C (TYPE 1)]

MODE DOOR MOTOR

MODE DOOR MOTOR

System Description

INFOID:0000000009882516

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:0000000009882517

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:0000000009882518

Regarding Wiring Diagram information, refer to 

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

tem"

.

SYMPTOM:

• Air outlet does not change.

WJIA0587E