Infiniti QX4 (R50). Manual — part 473
RHA593F
COMPONENT DESCRIPTION
NBHA0057
The intake door motor is attached to the intake unit. It rotates so
that air is drawn from inlets set by the auto amplifier. Motor rota-
tion is conveyed to a lever which activates the intake door.
RHA502GA
DIAGNOSTIC PROCEDURE
NBHA0058
SYMPTOM: Intake door motor does not operate normally.
I
Perform Self-diagnosis STEP 1 before referring to the flow
chart.
1
CHECK BODY GROUND CIRCUIT FOR INTAKE DOOR MOTOR
Does continuity exist between intake door harness terminal No. 1 and body ground?
RHA492G
Yes or No
Yes
©
GO TO 2.
No
©
Repair harness or connector.
TROUBLE DIAGNOSES
Intake Door Motor (Cont’d)
HA-90
2
CHECK FOR AUTO AMP. OUTPUT
Set up Self-diagnosis STEP 4.
Measure voltage across auto amp. harness terminals and body ground.
RHA821H
MTBL0466
OK or NG
OK
©
INSPECTION END
NG
©
GO TO 3.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSES
Intake Door Motor (Cont’d)
HA-91
3
CHECK CIRCUIT CONTINUITY BETWEEN AUTO AMP. AND INTAKE DOOR MOTOR
Check circuit continuity between each terminal on auto amp. and on intake door motor.
RHA822H
MTBL0510
Continuity should exist.
If OK, check harness for short.
OK or NG
OK
©
GO TO 4.
NG
©
Repair harness or connector.
TROUBLE DIAGNOSES
Intake Door Motor (Cont’d)
HA-92
4
CHECK FOR AUTO AMP. OUTPUT
Set up Self-diagnosis STEP 4.
Measure voltage across auto amp. harness terminals and body ground.
RHA823H
MTBL0468
OK or NG
OK
©
Replace intake door motor.
NG
©
Replace auto amp.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSES
Intake Door Motor (Cont’d)
HA-93
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