Infiniti G35 (V35). Manual - part 95

TROUBLE DIAGNOSIS

ATC-51

ATC

Self-diagnosis Function

NJS0003B

DESCRIPTION

The self-diagnosis 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-diagnosis system is accomplished by
starting the engine (turning the ignition switch ON) and pressing OFF switch for at least 5 seconds. The OFF
switch must be pressed within 10 seconds after starting the engine (ignition switch is turned ON). This system
will be canceled by either pressing AUTO.ECON switch or turning the ignition switch OFF. Shifting from one
step is accomplished by means of turning temperature control dial, as required.
Shifting from STEP-5 to AUXILIARY MECHANISM is accomplished by means of pushing (fan) UP switch.

SJIA1276E

ATC-52

TROUBLE DIAGNOSIS

FUNCTION CONFIRMATION PROCEDURE

SET IN SELF-DIAGNOSIS MODE

Turn ignition switch ON.

Set in self-diagnosis mode as follows. Within 10 seconds after starting engine (ignition switch is turned
ON.), press OFF switch for at least 5 seconds.

NOTE:
If battery voltage drops below 12 V during diagnosis STEP-3, door motor speed becomes slower and as a
result, the system may generate an error even when operation is normal. To avoid this, start engine before
performing this diagnosis.

>> GO TO 2.

STEP-1: LEDS AND DISPLAY ARE CHECKED

Check LED illumination and display screen.

OK or NG

>> GO TO 3.

>> Malfunctioning OFF switch or display and A/C auto amp. Refer to

ATC-111, "Multiplex Communi-

cation Circuit"

CHECK TO ADVANCE SELF-DIAGNOSIS STEP-2

Turn temperature control dial clockwise.

Advance to self-diagnosis STEP-2?

YES

>> GO TO 4.

>> Replace A/C and audio controller. (Temperature control dial is malfunctioning.)

CHECK TO RETURN SELF-DIAGNOSIS STEP-1

Turn temperature control dial counterclockwise.

Return to self-diagnosis STEP-1?

YES

>> GO TO 5.

>> Replace A/C and audio controller. (Temperature control dial is malfunctioning.)

RJIA3483E

RJIA3484E

TROUBLE DIAGNOSIS

ATC-53

ATC

STEP-2: SENSOR CIRCUITS ARE CHECKED FOR OPEN OR SHORT CIRCUIT

Turn temperature control dial clockwise.

Does code No. 20 appear on the display?

YES

>> GO TO 6.

>> GO TO 14.

STEP-3: MODE DOOR AND INTAKE DOOR POSITIONS ARE CHECKED

Turn temperature control dial clockwise.

Does code No. 30 appear on the display?

YES

>> GO TO 7.

>> GO TO 15.

STEP-4: OPERATION OF EACH DOOR MOTOR IS CHECKED

Turn temperature control dial clockwise.

Press

(DEF) switch. Code No. of each door motor test is

indicated on the display.

>> GO TO 8.

PJIA0159E

PJIA0160E

PJIA0161E

ATC-54

TROUBLE DIAGNOSIS

CHECK ACTUATORS

Refer to the following chart and check discharge air flow, air temper-
ature, blower motor duty ratio and compressor operation.

Checks must be made visually, by listening the sound, or by touching air outlets with hand, etc. for improper
operation.
*1: FOOT position during automatic control. Refer to

ATC-59, "AUXILIARY MECHANISM: FOOT POSITION

SETTING TRIMMER"

OK or NG

>> GO TO 9.

●

Air outlet does not change.
Go to Mode Door Motor Circuit. Refer to

ATC-68, "Mode Door Motor Circuit"

●

Intake door does not change.
Go to Intake Door Motor Circuit. Refer to

ATC-74, "Intake Door Motor Circuit"

●

Discharge air temperature does not change.
Go to Air Mix Door Motor Circuit. Refer to