2001 INFINITI QX4 display

AUXILIARY MECHANISM: TEMPERATURE SETTING TRIMMER=NBHA0021S03Without Navigation SystemNBHA0021S0301The trimmer compensates for differences in range of±3ÉC (±6ÉF) between temperature setting (displayed
digitally) and temperature felt by driver.
Operating procedures for this trimmer are as follows:
IBegin Self-diagnosis STEP 5 mode.
IPress
(fan) UP switch to set system in auxiliary mode.
IDisplay shows ª
º in auxiliary mechanism.
It takes approximately 3 seconds.
IPress either
(HOT) or(COLD) switch as desired. Temperature will change at a rate of 0.5ÉC (1ÉF)
each time a switch is pressed.
SHA197E
When battery cable is disconnected, trimmer operation is canceled. Temperature set becomes that of
initial condition, i.e. 0ÉC (0ÉF).
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TROUBLE DIAGNOSES
Self-diagnosis (Cont'd)
HA-53

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

5 STEP 2 - SENSOR CIRCUITS ARE CHECKED FOR OPEN OR SHORT CIRCUIT
Turn temperature dial clockwise.
Does code No.
appear on the display?
RHA970DB
YesorNo
Ye s©GO TO 6.
No©GO TO 14.
6 STEP 3 - MODE DOOR AND INTAKE DOOR POSITIONS ARE CHECKED
Turn temperature dial clockwise.
Does code No.
appear on the display?
RHA869DD
YesorNo
Ye s©GO TO 7.
No©GO TO 15.
TROUBLE DIAGNOSES
Self-diagnosis (Cont'd)
HA-56

7 STEP 4 - OPERATION OF EACH ACTUATOR IS CHECKED
Turn temperature dial clockwise.
Engine running.
Press DEF switch, code No. of each actuator test is indicated on the display.
RHA495A
©GO TO 8.
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TROUBLE DIAGNOSES
Self-diagnosis (Cont'd)
HA-57

9 STEP 5 - TEMPERATURE OF EACH SENSOR IS CHECKED
Turn temperature dial clcokwise.
Code No.
appears on the display.
RHA492A
©GO TO 10.
10 CHECK AMBIENT SENSOR
Press(DEF) switch one time, temperature detected by ambient sensor is indicated on the display.
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.
RHA861H
OK or NG
OK©GO TO 11.
NG©Go to Ambient Sensor Circuit (HA-129).
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TROUBLE DIAGNOSES
Self-diagnosis (Cont'd)
HA-59

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.
RHA862H
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.
RHA862HA
OK or NG
OK©GO TO 13.
NG©Go to Intake Sensor Circuit (HA-139).
TROUBLE DIAGNOSES
Self-diagnosis (Cont'd)
HA-60

13 DETECTS MULTIPLEX COMMUNICATION ERROR
Press REC switch.
Does code No.
appears on the display
MTBL0509
YesorNo
Ye s©INSPECTION END
No©1. Go to ªMultiplex Communication Circuitº, HA-142.
2. Go to ªOPERATIONAL CHECKº, HA-66.
Confirm that A/C system is in good order.
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TROUBLE DIAGNOSES
Self-diagnosis (Cont'd)
HA-61

15 CHECK MALFUNCTIONING DOOR MOTOR POSITION SWITCH
Mode or (and) intake door motor position switch(es) is (are) malfunctioning.
(If two or more mode or intake doors are out of order, corresponding code numbers blink respectively two times.)
MTBL0508
*1: If mode door motor harness connector is disconnected, the following display pattern will appear.
,,,,,Return to
*2: If intake door motor harness connector is disconnected, the following display pattern will appear.
,,,Return to
*3: HA-75
*4: HA-87
RHA168DA
RHA498A
©INSPECTION END
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TROUBLE DIAGNOSES
Self-diagnosis (Cont'd)
HA-63