2001 INFINITI QX4 ignition

STEP-BY-STEP PROCEDURE=NBHA0021S02Without Navigation SystemNBHA0021S0201
1 SET IN SELF-DIAGNOSTIC MODE
1. Turn ignition switch ON.
2. Set in self-diagnostic mode as follows. Within 10 seconds after starting engine (ignition switch is turned ªONº.), press
switch for at least 5 seconds.
©GO TO 2.
2 STEP 1 - ALL LEDs AND SEGMENT ARE CHECKED
Do all LEDs and segments illuminate?
RHA454G
YesorNo
Ye s©GO TO 3.
No©Malfunctioning
switch, LED or fluorescent display tube.
Replace A/C auto amp.
3 VERIFY ADVANCE TO SELF-DIAGNOSIS STEP 2
1. Press(HOT) switch.
2. Does advance to self-diagnosis STEP 2?
YesorNo
Ye s©GO TO 4.
No©Malfunctioning
(HOT) switch.
Replace A/C auto amp.
4 VERIFY RETURN TO SELF-DIAGNOSIS STEP 1
1. Press(COLD) switch.
2. Does return to self-diagnosis STEP 1?
YesorNo
Ye s©GO TO 5.
No©Malfunctioning
(COLD) switch.
Replace A/C auto amp.
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TROUBLE DIAGNOSES
Self-diagnosis (Cont'd)
HA-45

11 CHECK IN-VEHICLE SENSOR
Press(DEF) switch the second time, temperature detected by in-vehicle sensor is indicated on the display screen.
ECON shown in display indicates negative temperature reading.
NOTE:
If temperature shown on display greatly differs from actual temperature, check sensor circuit first, then inspect sensor.
RHA500G
OK or NG
OK©GO TO 12.
NG©Go to In-vehicle Sensor Circuit (HA-132).
12 CHECK INTAKE SENSOR
Press(DEF) switch the third time, temperature detected by intake sensor is indicated on the display.
NOTE:
If temperature shown on display greatly differs from actual temperature, check sensor circuit first, then inspect sensor.
RHA500GB
OK or NG
OK©1. Press
(DEF) switch the fourth time. Display returns to original presentation 5.
2. Turn ignition switch OFF or
(AUTO) switch ON.
3. END
NG©Go to Intake Sensor Circuit (HA-139).
TROUBLE DIAGNOSES
Self-diagnosis (Cont'd)
HA-50

INTRODUCTION AND GENERAL DESCRIPTIONNBHA0021S04The self-diagnostic system diagnoses sensors, door motors, blower motor, etc. by system line. Refer to appli-
cable sections (items) for details. Shifting from normal control to the self-diagnostic system is accomplished
by starting the engine (turning the ignition switch from ªOFFº to ªONº) and pressing ª
º switch for at least
5 seconds. The ª
º switch must be pressed within 10 seconds after starting the engine (ignition switch is
turned ªONº). This system will be canceled by either pressing
(AUTO) switch or turning the ignition switch
ªOFFº. Shifting from one step to another is accomplished by means of turning temperature dial, as required.
Additionally shifting from STEP 5 to AUXILIARY MECHANISM is accomplished by means of pushing
(fan)
UP switch.
With Navigation SystemNBHA0021S0401
RHA859H
TROUBLE DIAGNOSES
Self-diagnosis (Cont'd)
HA-54

STEP-BY-STEP PROCEDURENBHA0021S05With Navigation SystemNBHA0021S0501
1 SET IN SELF-DIAGNOSTIC MODE
1. Turn ignition switch ON.
2. Set in self-diagnostic mode as follows. Within 10 seconds after starting engine (ignition switch is turned ªONº.), press
switch for at least 5 seconds.
©GO TO 2.
2 STEP 1 - ALL LEDs AND DISPLAY SCREEN ARE CHECKED
When switch's LED and display are functioning properly in STEP-1, LED and display will come on.
RHA860H
OK or NG
OK©GO TO 3.
NG©Malfunctioning
switch, LED or fluorescent display tube.
Go to ªMain Power Supply and Ground Circuit Checkº, HA-72.
3 VERIFY ADVANCE TO SELF-DIAGNOSIS STEP 2
1. Turn temperature dial clockwise.
2. Does advance to self-diagnosis STEP 2?
YesorNo
Ye s©GO TO 4.
No©Malfunctioning temperature dial.
Check Display & NAVI control unit.
4 VERIFY RETURN TO SELF-DIAGNOSIS STEP 1
1. Turn temperature dial counterclockwise.
2. Does return to self-diagnosis STEP 1?
YesorNo
Ye s©GO TO 5.
No©Malfunctioning temperature dial.
Check Display & NAVI control unit.
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TROUBLE DIAGNOSES
Self-diagnosis (Cont'd)
HA-55

Operational CheckNBHA0019The purpose of the operational check is to confirm that the system
operates properly.
CONDITIONS:NBHA0019S01IEngine running and at normal operating temperature.
RHA864H
RHA335HA
PROCEDURE:NBHA0019S021. Check Memory FunctionNBHA0019S02011. Set the temperature 85ÉF or 32ÉC.
2. Press OFF switch.
3. Turn the ignition off.
4. Turn the ignition on.
5. Press the AUTO switch.
6. Confirm that the set temperature remains at previous tempera-
ture.
7. Press OFF switch.
If NG, go to trouble diagnosis procedure for memory function (HA-
126).
If OK, continue with next check.
RHA457GA
RHA329HA
2. Check BlowerNBHA0019S02021. Press fan switch (up side) one time.
Blower should operate on low speed.
The fan symbol should have one blade lit
.
2. Press fan switch (up side) one more time, and continue check-
ing blower speed and fan symbol until all speeds are checked.
3. Leave blower on MAX speed
.
If NG, go to trouble diagnosis procedure for blower motor (HA-95).
If OK, continue with next check.
TROUBLE DIAGNOSES
Operational Check
HA-66

RHA817H
DIAGNOSTIC PROCEDURENBHA0107SYMPTOM:
IA/C system does not come on.
RHA818H
Auto Amp. CheckNBHA0107S01Check power supply circuit for auto amp. with ignition switch ON.
Measure voltage across terminal Nos. 26, 27, 33 (24, 25, 33) and
body ground.
Voltmeter terminal
Voltage
(+) (þ)
26 (24)
Body ground Approx. 12V 27 (25)
33 (33)
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TROUBLE DIAGNOSES
A/C System (Cont'd)
HA-73

SHA967EE
RHA868H
Check body ground circuit for auto amp. with ignition switch OFF.
Check for continuity between terminal Nos. 32, 14 and body
ground.
Ohmmeter terminal
Continuity
(+) (þ)
32
Body ground Yes
14 (Canada only)
If OK, check auto amp. ground circuit, see below.
IIf NG, check 7.5A fuses (Nos. 11 and 24, located in the fuse
block) and 15A fuses (Nos. 1 and 2, located in the fuse block).
IIf fuses are OK, check for open circuit in wiring harness.
Repair or replace as necessary.
IIf fuses are NG, replace fuse and check wiring harness for
short circuit. Repair or replace as necessary.
NOTE:
If OK, replace auto amp.
If NG, repair or replace harness.
TROUBLE DIAGNOSES
A/C System (Cont'd)
HA-74

CompressorNBHA0081
ModelCALSONIC make V-6
TypeV-6 variable displacement
Displacement
cm
3(cu in)/rev.Max. 184 (11.228)
Min. 14.5 (0.885)
Cylinder bore x stroke
mm (in)37 (1.46) x [2.3 - 28.6 (0.091 - 1.126)]
Direction of rotationClockwise (viewed from drive end)
Drive beltPoly V
LubricantNBHA0082
ModelCALSONIC make V-6
NameNissan A/C System Oil Type S
Part number*KLH00-PAGS0
Capacity
m(US fl oz, Imp fl oz)Total in system 200 (6.8, 7.0)
Compressor (Service part) charging amount 200 (6.8, 7.0)
*: Always check with the Parts Department for the latest parts information.
RefrigerantNBHA0083
TypeHFC-134a (R-134a)
Capacity
kg (lb)0.60 - 0.70 (1.32 - 1.54)
Engine Idling Speed (When A/C is ON)NBHA0084IRefer to EC-649, ªIdle Speed and Ignition Timingº.
Belt TensionNBHA0085IRefer to MA-29, ªEngine Maintenanceº.
SERVICE DATA AND SPECIFICATIONS (SDS)
Compressor
HA-160