2001 INFINITI QX4 Ac system

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Page 1492 of 2395

INFINITI QX4 2001  Factory Service Manual After performing preliminary check, go to symptom chart
below.
SYMPTOM CHARTNBEL0123S02
REFERENCE PAGE (EL- ) 306 308 309 312 313 314 315 316 318 277
SYMPTOM
PRELIMINARY CHECK
POWER SUPPLY AND GROUND

Page 1493 of 2395

INFINITI QX4 2001  Factory Service Manual SEL336X
POWER SUPPLY AND GROUND CIRCUIT CHECKNBEL0123S03Power Supply Circuit CheckNBEL0123S0301
Terminals Ignition switch position
(+) (þ) OFF ACC ON
10 GroundBattery
voltageBattery
voltageBattery
vo

Page 1494 of 2395

INFINITI QX4 2001  Factory Service Manual DOOR, HOOD AND GLASS HATCH SWITCH CHECK=NBEL0123S04Door Switch CheckNBEL0123S0401
1 CHECK DOOR SWITCH INPUT SIGNAL
Check voltage between smart entrance control unit terminals 28, 29 or 40 and ground.

Page 1495 of 2395

INFINITI QX4 2001  Factory Service Manual Hood Switch Check=NBEL0123S0402
1 CHECK HOOD SWITCH FITTING CONDITION
OK or NG
OK©GO TO 2.
NG©Adjust installation of hood switch or hood.
2 CHECK HOOD SWITCH INPUT SIGNAL
Check voltage between smart

Page 1496 of 2395

INFINITI QX4 2001  Factory Service Manual Glass Hatch Switch Check=NBEL0123S0403
1 CHECK GLASS HATCH SWITCH INPUT SIGNAL
Check voltage between smart entrance control unit terminal 38 and ground.
SEL339X
Refer to wiring diagram in EL-300.
OK o

Page 1497 of 2395

INFINITI QX4 2001  Factory Service Manual SECURITY INDICATOR LAMP CHECK=NBEL0123S05
1 CHECK INDICATOR LAMP OUTPUT SIGNAL
1. Disconnect smart entrance control unit connector.
2. Check voltage between control unit terminal 31 and ground.
SEL341

Page 1498 of 2395

INFINITI QX4 2001  Factory Service Manual DOOR UNLOCK SENSOR CHECK=NBEL0123S06
1 CHECK DOOR UNLOCK SENSOR INPUT SIGNAL
Check voltage between smart entrance control unit terminals 26, 36 or 37 and ground.
SEL343X
Refer to wiring diagram in EL-

Page 1499 of 2395

INFINITI QX4 2001  Factory Service Manual FRONT DOOR KEY CYLINDER SWITCH CHECK=NBEL0123S07
1 CHECK DOOR KEY CYLINDER SWITCH INPUT SIGNAL (LOCK/UNLOCK SIGNAL)
Check voltage between smart entrance control unit terminals 30 or 41 and ground.
SEL