Nissan Titan. Instruction — 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)"
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
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
Instruction A/C Type
Description
Visual Identification
Instruction A/C (Type 1)
Two Control Dial System
Instruction 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
.
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 - Instruction With 2 Control Dial Sys-
SYMPTOM:
• Air outlet does not change.
WJIA0587E
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