Nissan Frontier. Manual — part 889
HAC-110
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL A/C (TYPE 1)]
AIR MIX DOOR MOTOR
1. Check continuity between front air control harness connector
M50 (A) terminal 6 and air mix door motor harness connector
M147 (B) terminal 2.
2. Check continuity between front air control harness connector
M50 terminal 6 and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace harness as necessary.
5.
CHECK FRONT AIR CONTROL FOR 5 VOLT REFERENCE (VREF), VREF RETURN, AND FEEDBACK
SIGNAL
1. Reconnect front air control harness connectors.
2. Turn ignition switch ON.
3. Check voltage between front air control harness connector M50 terminal 3 and M59 terminal 28.
4. Check voltage between front air control harness connector M50
terminal 6 and ground.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Replace front air control. Refer to
6.
CHECK FRONT AIR CONTROL FOR FEEDBACK SIGNAL
1. Reconnect the air mix door motor harness connector M147.
2. Check voltage between front air control harness connector M50
terminal 6 and ground.
Is the inspection result normal?
YES
>> Inspect air mix door for binding or mechanical failure. If
air mix door moves freely, replace front air control. Refer
to
VTL-7, "Removal and Installation"
.
A
B
Continuity
Connector
Terminal
Connector
Terminal
M50
6
M147
2
Yes
AWIIA1208ZZ
Connector
Terminal
—
Continuity
M50
6
Ground
No
AWIIA0383ZZ
Connector
Terminals
Connector
Terminals
Voltage (Approx.)
(+)
(-)
M59
28
M50
3
5 Volts
Connector
Terminal
—
Voltage (Approx.)
M50
6
Ground
0 Volts
AWIIA0382ZZ
Connector
Terminal
—
Voltage (Approx.)
M50
6
Ground
0.2 to 4.8 Volts
AWIIA0382ZZ
AIR MIX DOOR MOTOR
HAC-111
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL A/C (TYPE 1)]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
NO
>> Replace the air mix door motor. Refer to
VTL-23, "Removal and Installation"
.
HAC-112
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL A/C (TYPE 1)]
INTAKE DOOR MOTOR
INTAKE DOOR MOTOR
System Description
INFOID:0000000009478341
SYSTEM DESCRIPTION
Component Parts
Intake door control system components are:
• Front air control
• Intake door motor
• Intake sensor
System Operation
The intake door control determines the intake door position based on the position of the recirculation switch.
When the recirculation switch is depressed the intake door motor rotates closing off the fresh air inlet and
recirculating the cabin air. If the recirculation switch is depressed again, the intake door motor rotates in the
opposite direction, again allowing fresh air into the cabin.
COMPONENT DESCRIPTION
Intake door motor
The intake door motor is attached to the intake unit. It rotates so that
air is drawn from inlets set by the front air control. Motor rotation is
conveyed to a lever which activates the intake door.
Intake Door Motor Component Function Check
INFOID:0000000009478342
SYMPTOM:
• Intake door does not change.
• Intake door motor does not operate normally.
INSPECTION FLOW
1.
CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - REC (
)
1. Turn blower control dial to any speed.
WJIA1478E
WJIA1486E
INTAKE DOOR MOTOR
HAC-113
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL A/C (TYPE 1)]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
2. Press vent mode (
) switch.
3. Press REC (
) switch.
4. Press REC (
) switch again.
5. Listen for intake door position change (you should hear blower sound change slightly).
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Go to diagnosis procedure. Refer to
HAC-113, "Intake Door Motor Diagnosis Procedure"
.
Intake Door Motor Diagnosis Procedure
INFOID:0000000009478343
Regarding Wiring Diagram information, refer to
HAC-133, "Wiring Diagram - With Type 1"
.
DIAGNOSTIC PROCEDURE FOR INTAKE DOOR MOTOR
SYMPTOM:
• Intake door does not change.
• Intake door motor does not operate normally.
1.
CHECK INTAKE DOOR MOTOR CIRCUITS FOR OPEN AND SHORT TO GROUND
1. Turn ignition switch OFF.
2. Disconnect the front air control harness connector M50 (A) and
the intake door motor harness connector M58 (B).
3. Check continuity between front air control harness connector
M50 (A) terminals 21, 22 and the intake door motor harness
connector M58 (B) terminals 1, 6.
4. Check continuity between front air control harness connector
M50 terminals 8, 7 and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace harness as necessary.
2.
CHECK FRONT AIR CONTROL FOR INTAKE AIR DOOR MOTOR POWER AND GROUND
1. Reconnect front air control harness connector.
2. Turn ignition switch ON.
3. Check voltage between front air control harness connector M50
terminal 21 and terminal 22 while placing the HVAC system into
self-diagnostic mode.
A
B
Continuity
Connector
Terminal
Connector
Terminal
M50
21
M58
6
Yes
22
1
AWIIA0401ZZ
Connector
Terminal
—
Continuity
M50
21
Ground
No
22
AWIIA0398ZZ
Connector
Terminals
Condition Voltage
(Approx.)
(+) (-)
M50
22
21
Self-diagnostic mode (opening)
Battery voltage
21
22
Self-diagnostic mode (closing)
Battery voltage
AWIIA0399ZZ
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