2005 INFINITI QX4 Factory Service Manual

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Page 1065 of 3419

INFINITI QX4 2005 Factory Service Manual BRC-54
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Revision: October 20052005 QX56
4. REAR PRESSURE SENSOR INSPECTION
1. Reconnect the rear pressure sensor and ABS actuator and electric

Page 1066 of 3419

INFINITI QX4 2005 Factory Service Manual TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
BRC-55
[VDC/TCS/ABS]
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Revision: October 20052005 QX56
CAN Communication System InspectionEFS004Y4
INSPECTION PROCEDURE
1. CHECK CO

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
BRC-55
[VDC/TCS/ABS]
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Revision: October 20052005 QX56
CAN Communication System InspectionEFS004Y4
INSPECTION PROCEDURE
1. CHECK CONNECTOR
1. Turn ignition switch OFF, disconnect the ABS actuator and electric unit (control unit) connector, and check
the terminals for deformation, disconnection, looseness, and so on. If there is a malfunction, repair or
replace the terminal.
2. Reconnect connector to perform self-diagnosis.
Is "CAN COMM CIRCUIT" displayed in self-diagnosis display items?
YES >> Print out the self-diagnostic results, and refer to LAN-5, "CAN COMMUNICATION" .
NO >> Connector terminal is loose, damaged, open, or shorted.
Inspection For Self-diagnosis Result "ST ANGLE SEN SIGNAL"EFS004Y5
INSPECTION PROCEDURE
1. DISPLAY SELF-DIAGNOSIS RESULTS
Perform ABS actuator and electric unit (control unit) self-diagnosis.
Do self-diagnosis results indicate anything other than shown above?
YES >> Perform repair or replacement for the item indicated.
NO >> Perform adjustment of steering angle sensor neutral position. GO TO 2.
2. PERFORM SELF-DIAGNOSIS AGAIN
1. Turn the ignition switch to OFF and then to ON and erase self-diagnosis results.
2. Perform ABS actuator and electric unit (control unit) self-diagnosis again.
Are any self-diagnosis results displayed?
YES >> Replace steering angle sensor. Refer to BRC-68, "Removal and Installation" .
NO >> Inspection End.
Inspection For Self-diagnosis Result "DECEL G SEN SET"EFS004Y6
INSPECTION PROCEDURE
1. PERFORM SELF-DIAGNOSIS
Perform ABS actuator and electric unit (control unit) self-diagnosis.
Do self-diagnosis results indicate anything other than shown above?
YES >> Perform repair or replacement for the item indicated.
NO >> Perform calibration of decel G sensor. Refer to BRC-62, "
Calibration of Decel G Sensor" . GO TO
2.
2. PERFORM SELF-DIAGNOSIS AGAIN
1. Turn the ignition switch to OFF and then to ON and erase self-diagnosis results.
2. Perform ABS actuator and electric unit (control unit) self-diagnosis again.
Are any self-diagnosis results displayed?
YES >> Replace yaw rate/side/decel G sensor. Refer to BRC-69, "Removal and Installation" .
NO >> Inspection End.
Self-diagnosis results
ST ANGLE SEN SIGNAL
Self-diagnosis results
DECEL G SEN SET

Page 1067 of 3419

INFINITI QX4 2005 Factory Service Manual BRC-56
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Revision: October 20052005 QX56
VDC OFF Indicator lamp Does Not IlluminateEFS004Y7
INSPECTION PROCEDURE
1. CHECK VDC OFF INDICATOR LAMP

Page 1068 of 3419

INFINITI QX4 2005 Factory Service Manual TROUBLE DIAGNOSES FOR SYMPTOMS
BRC-57
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Revision: October 20052005 QX56
TROUBLE DIAGNOSES FOR SYMPTOMSPFP:99999
ABS Works FrequentlyEFS004Y9
1. CHECK WARNING LAM

Page 1069 of 3419

INFINITI QX4 2005 Factory Service Manual BRC-58
[VDC/TCS/ABS]
TROUBLE DIAGNOSES FOR SYMPTOMS
Revision: October 20052005 QX56
Unexpected Pedal ActionEF S0 04 YA
1. CHECK WARNING LAMP ACTIVATION
Make sure warning lamp remains off while driving

Page 1070 of 3419

INFINITI QX4 2005 Factory Service Manual TROUBLE DIAGNOSES FOR SYMPTOMS
BRC-59
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Revision: October 20052005 QX56
Long Stopping DistanceEFS004YB
1. CHECK BASE BRAKING SYSTEM PERFORMANCE
1. Disable ABS by

Page 1071 of 3419

INFINITI QX4 2005 Factory Service Manual BRC-60
[VDC/TCS/ABS]
TROUBLE DIAGNOSES FOR SYMPTOMS
Revision: October 20052005 QX56
ABS Warning Lamp Does Not Come On When Ignition Switch Is Turned OnEFS004YE
1. CHECK ABS ACTUATOR AND ELECTRIC UNIT

Page 1072 of 3419

INFINITI QX4 2005 Factory Service Manual TROUBLE DIAGNOSES FOR SYMPTOMS
BRC-61
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Revision: October 20052005 QX56
Vehicle Jerks During TCS/VDC ActivationEFS004YG
1. ABS ACTUATOR AND ELECTRIC UNIT (CONTRO

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