2001 INFINITI QX4 fuse

Low Voltage
DIAGNOSTIC PROCEDURENBBR0105Malfunction code No. 57
1 INSPECTION START
ABS actuator and electric unit power supply and ground circuit inspection
SBR494E
©GO TO 2.
2 CHECK FUSE
Check 7.5A fuse No. 7. For fuse layout, refer to EL-16, ªPOWER SUPPLY ROUTINGº.
Is fuse OK?
Ye s©GO TO 3.
No©GO TO 6.
3 CHECK CONNECTOR
1. Disconnect ABS actuator and electric unit connector. Check terminals for damage or loose connections. Then recon-
nect connector.
2. Carry out self-diagnosis again.
Does warning lamp activate again?
Ye s©GO TO 4.
No©INSPECTION END
4 CHECK ABS ACTUATOR AND ELECTRIC UNIT GROUND CIRCUIT
Refer to ªABS ACTUATOR AND ELECTRIC UNIT GROUNDº in ªGround Circuit Checkº, BR-53.
Is ground circuit OK?
Ye s©GO TO 5.
No©Repair harness or connector.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMSABS
Low Voltage
BR-63

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) terminal 15 and ground.
SBR495E
Does battery voltage exist when ignition switch is turned ON?
Ye s©Replace ABS actuator and electric unit.
No©Check the following.
If NG, repair harness or connector.
IHarness connector E111
IHarness for open or short between ABS actuator and electric unit and fuse
6 REPLACE FUSE
Replace fuse.
Does the fuse blow out when ignition switch is turned ON?
Ye s©GO TO 7.
No©INSPECTION END
7 CHECK ABS ACTUATOR AND ELECTRIC UNIT POWER SUPPLY CIRCUIT FOR SHORT
1. Disconnect battery cable and ABS actuator and electric unit connector.
2. Check continuity between ABS actuator and electric unit connector E111 (body side) terminal 15 and ground.
SBR496E
Continuity should not exist.
Does continuity exist?
Ye s©Check the following.
If NG, repair harness or connector.
IHarness connector E111
IHarness for open or short between ABS actuator and electric unit and fuse
No©Replace ABS actuator and electric unit.
TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMSABS
Low Voltage (Cont'd)
BR-64

G Sensor and Circuit
DIAGNOSTIC PROCEDURENBBR0114Malfunction code No. 17
1 INSPECTION START
G sensor inspection
SBR504E
©GO TO 2.
2 CHECK FUSE
Check 7.5A fuse No. 7 for ABS actuator and electric unit. For fuse layout, refer to EL-16, ªPOWER SUPPLY ROUTINGº.
Is fuse OK?
Ye s©GO TO 3.
No©Replace fuse.
3 CHECK CONNECTOR
1. Disconnect connectors from ABS actuator and electric unit and G sensor. Check terminals for damage or loose connec-
tion. Then reconnect connectors.
2. Carry out self-diagnosis again.
Does warning lamp activate again?
Ye s©GO TO 4.
No©INSPECTION END
4 CHECK G SENSOR
Refer to ªG SENSORº in ªElectrical Components Inspectionº, BR-67.
Is resistance within specifications?
Ye s©GO TO 5.
No©Replace G sensor.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMSABS
G Sensor and Circuit
BR-65

5 CHECK G SENSOR POWER SUPPLY CIRCUIT
Check voltage between G sensor connector terminals 1, 2 and ground.
SBR861D
Does battery voltage exist?
Ye s©GO TO 6.
No©Check the following. If NG, repair harness or connectors.
IHarness connectors B58, B81
IHarness for open or short between G sensor and fuse
6 CHECK CIRCUIT
1. Disconnect harness connector from ABS actuator and electric unit.
2. Check continuity between ABS actuator and electric unit connector terminals 20, 10 and G sensor connector terminals
17, 51.
SBR505E
Does continuity exist?
Ye s©Check actuator and electric unit pin terminals for damage or the connection of actuator
and electric unit harness connector. Reconnect actuator and electric unit harness con-
nector. Then retest.
No©Check the following. If NG, repair harness or connectors.
IHarness connectors E111, B58, B81
IHarness for open or short between G sensor connector and actuator and electric unit
TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMSABS
G Sensor and Circuit (Cont'd)
BR-66

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 in ª2. Unexpected Pedal Actionº,
BR-70.
NOTE:
ABS may operate and cause vibration under any of the following
conditions.
IApplying brake gradually when shifting or operating clutch.
ILow friction (slippery) road.
IHigh speed cornering.
IDriving over bumps and pot holes.
IEngine speed is over 5,000 rpm with vehicle stopped.
6. Warning Lamp Does Not Come On When
Ignition Switch Is Turned On
NBBR0112
1 INSPECTION START
Warning lamp circuit inspection
SBR673E
©GO TO 2.
2 CHECK FUSE
Check 10A fuse No. 8. For fuse layout, refer to EL-16, ªPOWER SUPPLY ROUTINGº.
Is fuse OK?
Ye s©GO TO 3.
No©Replace fuse.
TROUBLE DIAGNOSES FOR SYMPTOMSABS
5. Pedal Vibration and Noise (Cont'd)
BR-72

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-16, ªPOWER SUPPLY ROUTINGº.
Is fuse OK?
Ye s©GO TO 3.
No©GO TO 8.
3 CHECK HARNESS CONNECTOR
Check ABS actuator and electric unit pin terminals for damage or bad connection of ABS actuator and electric unit harness
connector. Reconnect ABS actuator and electric unit harness connector. Then retest.
Does warning lamp stay on when ignition switch is turned ON?
Ye s©GO TO 4.
No©INSPECTION END
4 CHECK ABS ACTUATOR AND ELECTRIC UNIT GROUND CIRCUIT
Refer to ªABS ACTUATOR AND ELECTRIC UNIT GROUNDº in ªGround Circuit Checkº, BR-53.
Is ground circuit OK?
Ye s©GO TO 5.
No©Repair harness or connector.
TROUBLE DIAGNOSES FOR SYMPTOMSABS
7. Warning Lamp Stays On When Ignition Switch Is Turned On
BR-74

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) terminal 15 and ground.
SBR495E
Does battery voltage exist when ignition switch is turned ON?
Ye s©GO TO 6.
No©Check the following.
If NG, repair harness or connector.
IHarness connector E111
IHarness for open or short between ABS actuator and electric unit and fuse
6 CHECK WARNING LAMP
1. Disconnect ABS actuator and electric unit connector.
2. Connect suitable wire between ABS actuator and electric unit connector E111 (body side) terminal 10 (2WD) or 21
(4WD) and ground.
SBR502E
Does the warning lamp deactivate?
Ye s©Replace ABS actuator and electric unit.
No©GO TO 7.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSES FOR SYMPTOMSABS
7. Warning Lamp Stays On When Ignition Switch Is Turned On (Cont'd)
BR-75

7 CHECK ABS WARNING LAMP CONTROL CIRCUIT FOR OPEN
1. Disconnect combination meter connector M24.
2. Check continuity between combination meter connector M24 (body side) terminal 10 and ABS actuator and electric unit
connector E111 (body side) terminal 10 (2WD) or 21 (4WD).
NOTE:
Connect positive lead of multimeter to combination meter connector M24 (body side) terminal 10 and negative lead to
ABS actuator and electric unit connector E111 (body side) terminal 10 (2WD) or 21 (4WD).
SBR675E
Continuity should exist.
Does continuity exist?
Ye s©Check combination meter.
Refer to EL-114, ªWARNING LAMPSº.
No©Repair harness or connectors.
8 REPLACE FUSE
Replace fuse.
Does the fuse blow out when ignition switch is turned ON?
Ye s©GO TO 9.
No©INSPECTION END
9 CHECK ABS ACTUATOR AND ELECTRIC UNIT POWER SUPPLY CIRCUIT FOR SHORT
1. Disconnect battery cable and ABS actuator and electric unit connector.
2. Check continuity between ABS actuator and electric unit connector E111 (body side) terminal 15 and ground.
SBR496E
Continuity should not exist.
Does continuity exist?
Ye s©Check the following.
If NG, repair harness or connector.
IHarness connector E111
IHarness for open or short between ABS actuator and electric unit and fuse
No©Replace ABS actuator and electric unit.
TROUBLE DIAGNOSES FOR SYMPTOMSABS
7. Warning Lamp Stays On When Ignition Switch Is Turned On (Cont'd)
BR-76