2001 INFINITI QX4 Factory Service Manual

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Page 1841 of 2395

INFINITI QX4 2001 Factory Service Manual TERMINAL NO.ITEM CONDITIONVoltage V 6 Intake door position switch Intake door positionRECIRCULATION Approximately 4.6 FRESH or 20% FRESH Approximately 0 7Multiplex communication sig- nal (AMP,NAVI)Ð

Page 1842 of 2395

INFINITI QX4 2001 Factory Service Manual TERMINAL NO.ITEM CONDITIONVoltage V 25 Power supply for IGN Ð Approximately 12 26Power supply for intake door motorIntake door positionFRE,REC Approximately 12 REC,FRE Approximately 0 32 Ground Ð Ap

Page 1843 of 2395

INFINITI QX4 2001 Factory Service Manual Self-diagnosis=NBHA0021INTRODUCTION AND GENERAL DESCRIPTIONNBHA0021S01The self-diagnostic system diagnoses sensors, door motors, blower motor, etc. by system line. Refer to appli- cable sections (item

Page 1844 of 2395

INFINITI QX4 2001 Factory Service Manual 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 st

Page 1845 of 2395

INFINITI QX4 2001 Factory Service Manual 5 STEP 2 - SENSOR CIRCUITS ARE CHECKED FOR OPEN OR SHORT CIRCUIT Press(HOT) switch. Does code No. appear on the display? RHA970DB YesorNo Ye s©GO TO 6. No©GO TO 13. 6 STEP 3 - MODE DOOR AND INTAKE D

Page 1846 of 2395

INFINITI QX4 2001 Factory Service Manual 7 STEP 4 - OPERATION OF EACH ACTUATOR IS CHECKED Press(HOT) switch. Engine running. Press DEF switch, code No. of each actuator test is indicated on the display. RHA495A ©GO TO 8. GI MA EM LC EC FE A

Page 1847 of 2395

INFINITI QX4 2001 Factory Service Manual 8 CHECK ACTUATORS Refer to the following chart and confirm discharge air flow, air temperature, blower motor voltage and compressor opera- tion. Checks must be made visually, by listening to any noise

Page 1848 of 2395

INFINITI QX4 2001 Factory Service Manual 9 STEP 5 - TEMPERATURE OF EACH SENSOR IS CHECKED Press(HOT) switch. Code No. appears on the display. RHA492A ©GO TO 10. 10 CHECK AMBIENT SENSOR Press(DEF) switch one time, temperature detected by amb
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