Nissan Titan. Manual - part 404
AIR MIX DOOR MOTOR
HAC-121
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL A/C (TYPE 1)]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
>> GO TO 2.
2.
CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - TEMPERATURE DECREASE
1. Turn the temperature control dial counterclockwise to maximum cold.
2. Check for cold air at discharge air outlets.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Go to diagnosis procedure. Refer to
HAC-121, "Air Mix Door Motor Diagnosis Procedure"
Air Mix Door Motor Diagnosis Procedure
INFOID:0000000009882521
Regarding Wiring Diagram information, refer to
HAC-155, "Wiring Diagram - Manual With 2 Control Dial Sys-
SYMPTOM:
• Discharge air temperature does not change.
• Air mix door motor does not operate.
1.
CHECK AIR MIX DOOR MOTOR POSITION BALANCED RESISTOR (PBR) FEEDBACK VOLTAGE
1. Turn ignition switch ON.
2. Using CONSULT, check "DVR MIX FDBCK" in "DATA MONITOR" mode in "HVAC". Refer to
3. Observe "DVR MIX FDBACK" voltage while rotating temperature control dial between 32
°C (90°F) and
18
°C (60°F).
Is the inspection result normal?
YES
>> • Air mix door motor is OK.
• Inspect air mix door for mechanical failure and repair if necessary. If air mix door is OK, refer to
HAC-167, "Component Function Check"
for insufficient cooling or
for insufficient heating.
NO
>> GO TO 2.
2.
CHECK AIR MIX 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 air mix door motor harness connector M147 (B).
3. Check continuity between front air control harness connector
M180 (A) terminals 17, 18 and the air mix door motor harness
connector M147 (B) terminals 1, 6.
Monitor Item
Condition
Results
DVR MIX FDBCK
Rotate temperature control dial between 32
°C
(90
°F) and 18°C (60°F)
Voltage varies with dial rotation between 0.2 and 4.8
volts.
A
B
Continuity
Connector
Terminal
Connector
Terminal
M180
17
M147
1
Yes
18
6
AWIIA0377ZZ