2001 INFINITI QX4 IDX

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Page 1884 of 2395

INFINITI QX4 2001  Factory Service Manual Air Mix Door Control SpecificationNBHA0059S03
RHA137G
RHA849E
COMPONENT DESCRIPTIONNBHA0060The air mix door motor is attached to the heater unit. It rotates so
that the air mix door is opened or close

Page 1886 of 2395

INFINITI QX4 2001  Factory Service Manual Intake Door Motor
TROUBLE DIAGNOSIS PROCEDURE FOR INTAKE DOOR=NBHA0092SYMPTOM:
IIntake door does not change.
IIntake door motor does not operate normally.
Inspection FlowNBHA0092S01Without Navigation

Page 1888 of 2395

INFINITI QX4 2001  Factory Service Manual SYSTEM DESCRIPTION=NBHA0056Component PartsNBHA0056S01Intake door control system components are:
1) Auto amp.
2) Intake door motor
3) A/C LAN system (PBR built-in mode motor and air mix door motor)
4)

Page 1890 of 2395

INFINITI QX4 2001  Factory Service Manual 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

Page 1892 of 2395

INFINITI QX4 2001  Factory Service Manual 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

Page 1894 of 2395

INFINITI QX4 2001  Factory Service Manual Blower Motor
TROUBLE DIAGNOSIS PROCEDURE FOR BLOWER MOTOR=NBHA0094SYMPTOM:
IBlower motor operation is malfunctioning.
IBlower motor operation is malfunctioning under out of starting fan speed control.

Page 1896 of 2395

INFINITI QX4 2001  Factory Service Manual SYSTEM DESCRIPTION=NBHA0062Component partsNBHA0062S01Fan speed control system components are:
1) Auto amp.
2) Fan control amp.
3) A/C LAN system (PBR built-in mode door motor and air mix door motor)
4

Page 1898 of 2395

INFINITI QX4 2001  Factory Service Manual 1 CHECK POWER SUPPLY FOR FAN CONTROL AMP.
Disconnect fan control amp. harness connector.
Do approx. 12 volts exist between fan control amp. harness terminal No. 3 and body ground?
RHA480G
YesorNo
Ye s