Infiniti I35 (A33). Manual — part 536
4
CHECK SIGNAL FOR MOTOR SIDE
Do approx. 5.5 volts exist between each door motor (LCU) harness connector terminal No. 3 and ground?
RHA376HC
Yes or No
Yes
©
GO TO 5.
No
©
Repair harness or connector.
5
CHECK MOTOR GROUND CIRCUIT
Does continuity exist between each door motor (LCU) harness connector terminal No. 2 and ground?
RHA377HB
Yes or No
Yes
©
GO TO 6.
No
©
Repair harness or connector.
6
CHECK MOTOR OPERATION
Disconnect and reconnect the motor connector and confirm the motor operation.
OK or NG
OK (Return to operate
normally.)
©
Poor contacting the motor connector
NG (Does not operate
normally.)
©
GO TO 7.
GI
MA
EM
LC
EC
FE
AT
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSES
Mode Door Motor (Cont’d)
HA-57
7
CHECK MODE DOOR MOTOR AND AIR MIX DOOR MOTOR OPERATION
1. Disconnect the intake door motor connector.
2. Reconnect the mode door motor and air mix door motor connector and confirm the motors operation.
OK or NG
OK (Mode door motor
and air mix door motor
operates normally.)
©
Replace the intake door motor.
NG (Mode door motor
and air mix door motor
does not operate nor-
mally.)
©
GO TO 8.
8
CHECK AIR MIX DOOR MOTOR AND INTAKE DOOR MOTOR OPERATION
1. Disconnect the mode door motor.
2. Reconnect the intake door motor connector and confirm the air mix door motor and intake door motor operation.
OK or NG
OK (Air mix door motor
and intake door motor
operates normally.)
©
Replace mode door motor.
NG (Air mix door motor
and intake door motor
does not operate nor-
mally.)
©
GO TO 9.
9
CHECK INTAKE DOOR MOTOR AND MODE DOOR MOTOR OPERATION
1. Disconnect the air mix door motor connector.
2. Reconnect the mode door motor connector and confirm the intake door motor and mode door motor operation.
OK or NG
OK (Intake door motor
and mode door motor
operates normally.)
©
Replace air mix door motor.
NG (Intake door motor
and mode door motor
does not operate nor-
mally.)
©
Replace auto amp.
TROUBLE DIAGNOSES
Mode Door Motor (Cont’d)
HA-58
RHA371H
CONTROL LINKAGE ADJUSTMENT
=NHHA0186
Mode Door
NHHA0186S01
1.
Install mode door motor on heater unit and connect it to main
harness.
2.
Set up code No. in Self-diagnosis STEP-4. Refer to HA-37.
3.
Move side link by hand and hold mode door in DEF mode.
4.
Attach mode door motor rod to side link rod holder.
5.
Make sure mode door operates properly when changing from
code No.
to
by pushing DEF switch.
VENT
B/L
B/L
FOOT
D/F
DEF
GI
MA
EM
LC
EC
FE
AT
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSES
Mode Door Motor (Cont’d)
HA-59
Air Mix Door Motor
TROUBLE DIAGNOSIS PROCEDURE FOR AIR MIX DOOR (LAN)
=NHHA0187
SYMPTOM:
I
Discharge air temperature does not change.
I
Air mix door motor does not operate.
INSPECTION FLOW
RHA103I
*1: HA-36
*2: HA-93
*3: HA-97
*4: HA-100
*5: HA-106
*6: FUNCTION CONFIRMATION
PROCEDURE (HA-37), see No.
13.
*7: HA-55
*8: HA-62
*9: HA-62
*10: HA-47
*12: HA-47
*13: HA-46
*14: HA-104
*15: HA-37
TROUBLE DIAGNOSES
Air Mix Door Motor
HA-60
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