Infiniti G20 (P11). Manual — part 455
MAIN POWER SUPPLY AND GROUND CIRCUIT CHECK
=NCHA0132
Power Supply Circuit Check
NCHA0132S01
Check power supply circuit for air conditioner system.
Refer to EL-10, “Wiring Diagram — POWER —”.
A/C SYSTEM CIRCUIT
NCHA0191
SYMPTOM:
I
A/C system does not come on.
RHA093H
Push Control Unit Check
NCHA0191S01
Check power supply circuit for push control unit with ignition switch
ON.
1)
Disconnect push control unit harness connector.
2)
Connect voltmeter from harness side.
3)
Measure voltage across terminal No. 14 and body ground.
Voltmeter terminal
Voltage
(+)
(−)
14
Body ground
Approx. 12V
RHA094H
Check body ground circuit for push control unit with ignition switch
OFF.
1)
Disconnect push control unit harness connector.
2)
Connect ohmmeter from harness side.
3)
Check for continuity between terminal No. 17 and body
ground.
Ohmmeter terminal
Continuity
(+)
(−)
17
Body ground
Yes
GI
MA
EM
LC
EC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSES
MANUAL
A/C System (Cont’d)
HA-151
Intake Door
TROUBLE DIAGNOSIS PROCEDURE FOR INTAKE DOOR
=NCHA0133
SYMPTOM:
I
Intake door does not change.
INSPECTION FLOW
SHA182F
*1: HA-153
*2: HA-148
*3: HA-147
RHA096H
COMPONENT DESCRIPTION
NCHA0134
Intake Door Motor
NCHA0134S01
The intake door motor is attached to the intake unit. It rotates so
that air is drawn from inlets set by each mode switches. Motor
rotation is conveyed to a lever which activates the intake door.
RECIRCULATION switch is canceled by MODE switch in DEF and
D/F modes.
TROUBLE DIAGNOSES
MANUAL
Intake Door
HA-152
INTAKE DOOR MOTOR CIRCUIT
=NCHA0135
SYMPTOM:
I
Intake door does not change.
1
CHECK POWER SUPPLY FOR INTAKE DOOR MOTOR
Disconnect intake door motor harness connector.
Do approx. 12 volts exist between push control unit harness terminal Nos. 9, 11 and body ground?
SHA366F
Yes or No
Yes
©
GO TO 3.
No
©
GO TO 2.
2
CHECK CIRCUIT CONTINUITY BETWEEN INTAKE DOOR MOTOR AND PUSH CONTROL UNIT
Check circuit continuity between push control unit harness terminal Nos. 9 (11) and intake door motor harness terminal
Nos. 7 (6).
Continuity should exist.
RHA098HA
If OK, check harness for short.
Yes or No
Yes
©
Replace push control unit.
No
©
Repair harness or connector.
GI
MA
EM
LC
EC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSES
MANUAL
Intake Door (Cont’d)
HA-153
3
CHECK CIRCUIT CONTINUITY OF INTAKE DOOR MOTOR
Check circuit continuity between intake door motor harness terminal No. 6 and No. 7.
RHA099HA
OK or NG
OK
©
GO TO 4.
NG
©
Replace intake door motor.
4
CHECK INTAKE DOOR LINKAGE
Refer to Control Linkage Adjustment. (HA-155)
OK or NG
OK
©
GO TO 5.
NG
©
Repair or adjust.
5
CHECK FOR OUTPUT OF PUSH CONTROL UNIT
Do approx. 5 volts exist between intake door motor harness terminal Nos. 1, 4 and body ground?
RHA100H
Yes or No
Yes
©
GO TO 6.
No
©
GO TO 7.
TROUBLE DIAGNOSES
MANUAL
Intake Door (Cont’d)
HA-154
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