2001 INFINITI QX4 Factory Service Manual

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Page 457 of 2395

INFINITI QX4 2001 Factory Service Manual Control Unit DIAGNOSTIC PROCEDURE=NBBR0106Malfunction code No. 71 1 INSPECTION START ABS actuator and electric unit power supply and ground circuit inspection SBR497E ©GO TO 2. 2 CHECK CONNECTOR 1. D

Page 458 of 2395

INFINITI QX4 2001 Factory Service Manual 1. ABS Works FrequentlyNBBR0107 1 CHECK BRAKE FLUID PRESSURE Check brake fluid pressure distribution. Refer to ªInspectionº, ªLOAD SENSING VALVEº, BR-12. Is brake fluid pressure distribution norma

Page 459 of 2395

INFINITI QX4 2001 Factory Service Manual 2 CHECK MECHANICAL BRAKE SYSTEM PERFORMANCE Disconnect ABS actuator and electric unit connector and check whether brake is effective. Does brake system function properly when brake pedal is depressed?

Page 460 of 2395

INFINITI QX4 2001 Factory Service Manual NOTE: Stopping distance may be longer for vehicles without ABS when road condition is slippery. 4. ABS Does Not WorkNBBR0110 1 CHECK WARNING LAMP INDICATION Does the ABS warning lamp activate? YesorNo

Page 461 of 2395

INFINITI QX4 2001 Factory Service Manual 2 CHECK SYMPTOM 1. Apply brake. 2. Start engine. Does the symptom appear only when engine is started? Ye s©Carry out self-diagnosis. Refer to BR-41, 44. No©Go to ª3. CHECK WARNING LAMP INDICATIONº

Page 462 of 2395

INFINITI QX4 2001 Factory Service Manual 3 CHECK WARNING LAMP ACTIVATE Disconnect ABS actuator and electric unit connector. SBR672E Does the warning lamp activate? Ye s©Replace ABS actuator and electric unit. No©GO TO 4. 4 CHECK HARNESS FO

Page 463 of 2395

INFINITI QX4 2001 Factory Service Manual 7. Warning Lamp Stays On When Ignition Switch Is Turned On =NBBR0113 1 INSPECTION START ABS control unit inspection SBR674E ©GO TO 2. 2 CHECK FUSE Check 7.5A fuse No. 7. For fuse layout, refer to EL-

Page 464 of 2395

INFINITI QX4 2001 Factory Service Manual 5 CHECK ABS ACTUATOR AND ELECTRIC UNIT POWER SUPPLY CIRCUIT 1. Disconnect ABS actuator and electric unit connector. 2. Check voltage between ABS actuator and electric unit connector E111 (body side) t
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