2006 INFINITI QX56 display

BRC-36
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: November 20092006 QX56
Operation Procedure
1. Connect the CONSULT-II and CONSULT-II CONVERTER to the data link connector and start the engine.
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carries out CAN communication.
2. Touch “START (NISSAN BASED VHCL) ” on the display screen.
3. Touch “ABS”.
If “ABS” is not indicated, go to GI-40, "
CONSULT-II Data Link Connector (DLC) Circuit" .
4. Touch “ACTIVE TEST”.
5. The SELECT TEST ITEM screen is displayed.
6. Touch necessary test item.
7. With the “MAIN SIGNALS ” display selected, touch “START”.
8. The Active Test screen will be displayed, so conduct the following test.
Solenoid Valve Operation Chart
*: ON for 1 to 2 seconds after the touch, and then OFF
NOTE:

If active test is performed with brake pedal depressed, pedal stroke may change. This is normal.

“TEST IS STOPPED ” is displayed approximately 10 seconds after operation starts.

After “TEST IS STOPPED ” is displayed, to perform test again, repeat Step 6.
LBR379
Operation ABS solenoid valve ABS solenoid valve (ACT)
UP KEEP DOWN UP ACTUA-
TOR UP ACTUA-
TOR KEEP
FR RH SOL
FR RH ABS SOLE-
NOID (ACT) FR RH IN SOL
OFF ON ON OFF OFF OFF
FR RH OUT SOL OFF OFF ON* OFF OFF OFF
FR LH SOL
FR LH ABS SOLE-
NOID (ACT) FR LH IN SOL
OFF ON ON OFF OFF OFF
FR LH OUT SOL OFF OFF ON* OFF OFF OFF
RR RH SOL
RR RH ABS SOLE-
NOID (ACT) RR RH IN SOL
OFF ON ON OFF OFF OFF
RR RH OUT SOL OFF OFF ON* OFF OFF OFF
RR LH SOL
RR LH ABS SOLE-
NOID (ACT) RR LH IN SOL
OFF ON ON OFF OFF OFF
RR LH OUT SOL OFF OFF ON* OFF OFF OFF
REAR SOL RR RH IN SOL
OFF ON ON OFF OFF OFF
RR RH OUT SOL OFF OFF ON* OFF OFF OFF
RR LH IN SOL OFF ON ON OFF OFF OFF
RR LH OUT SOL OFF OFF ON* OFF OFF OFF

TROUBLE DIAGNOSISBRC-37
[VDC/TCS/ABS]
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BRC
Revision: November 2009 2006 QX56
ABS Motor
Touch “ON” and “OFF ” on the screen. Check that ABS motor relay
operates as shown in table below.
NOTE:

If active test is performed with brake pedal depressed, pedal
stroke may change. This is normal.

“TEST IS STOPPED ” is displayed approximately 10 seconds
after operation starts.
Booster Drive
CAUTION:
Perform active test subject to the conditions below.

Do not operate brake pedal during active test.

Make sure the engine revolution is over 500 rpm.

Make sure the vehicle is not moving.
Touch "UP" and "DOWN" on the screen. Check that booster drive
operates as shown in table below.
NOTE:
"TEST IS STOPPED" is displayed approximately 10 seconds after operation starts.
Operation ONOFF
ABS actuator relay ONON
ABS motor relay ONOFF
SFIA0593E
Operation UPDOWN
STOP LAMP SW ONOFF
BST OPER SIG ONOFF
PRESS SENSOR 50 ± 5 bar 0 bar
PRESS SEN 2 50 ± 5 bar 0 bar
STP OFF RLY OFFOFF
WFIA0350E

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMSBRC-39
[VDC/TCS/ABS]
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Revision: November 2009 2006 QX56
6. CHECK WIRING HARNESS FOR OPEN CIRCUIT
1. Check continuity between ABS actuator and electric unit (control unit) harness connector E125 and the malfunctioning wheel sensor harness connector E18, E117, C10, or C11.
OK or NG
OK >> Replace the ABS actuator and electric unit (control unit). Refer to BRC-66, "Removal and Installa-
tion" .
NG >> Repair the circuit.
Engine System InspectionEFS004XS
INSPECTION PROCEDURE
1. SELF-DIAGNOSIS RESULT CHECK
Check self-diagnosis results.
Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO >> Inspection End.
2. ENGINE SYSTEM INSPECTION
1. Perform ECM self-diagnosis and repair as necessary. Refer to EC-118, "
SELF-DIAG RESULTS MODE" .
2. Perform ABS actuator and electric unit (control unit) self-diagnosis again.
OK or NG
OK >> Inspection End.
NG >> Repair or replace as necessary.
Wheel sensor ABS actuator and
electric unit (control unit) Wheel sensor
Continuity
Connector Terminal Connector Terminal
Front LH
E12545
E18 1
Ye s
46
2
Front RH 34
E117 1
33 2
Rear LH 37
C11 2
36 1
Rear RH 42
C10 2
43 1
Continuity should exist.
Self-diagnosis results
ENGINE SIGNAL 1
ENGINE SIGNAL 2
ENGINE SIGNAL 3
ENGINE SIGNAL 4
ENGINE SIGNAL 6

BRC-40
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Revision: November 20092006 QX56
ABS/TCS/VDC Control Unit InspectionEFS004XT
INSPECTION PROCEDURE
1. SELF-DIAGNOSIS RESULT CHECK
Check self-diagnosis results.
Is the above displayed in the self-diagnosis display items?
YES >> Replace ABS actuator and electric unit (control unit). Refer to BRC-66, "Removal and Installation"
.
NO >> Inspection End.
Steering Angle Sensor SystemEFS004XU
INSPECTION PROCEDURE
1. CHECK SELF-DIAGNOSIS RESULT
Check self-diagnosis results.
Is above displayed in self-diagnosis item?
YES >> GO TO 2.
NO >> Inspection End.
2. CHECK CONNECTOR
1. Disconnect steering angle sensor connector M47 and ABS actuator and electric unit (control unit) connec- tor E125 and check terminals for deformation, disconnection, looseness, or damage. Repair or replace as
necessary.
2. Reconnect connectors and repeat ABS actuator and electric unit (control unit) self-diagnosis.
Is "ST ANG SEN CIRCUIT" or "ST ANG SEN COM CIR" displayed?
YES >> GO TO 3.
NO >> Inspection End.
3. CHECK STEERING ANGLE SENSOR HARNESS
1. Check CAN communication system. Refer to LAN-26, "
CAN COMMUNICATION" .
2. Turn ignition switch OFF and disconnect steering angle sensor connector M47 and ABS actuator and electric unit (control unit)
connector E125.
3. Check continuity between ABS actuator and electric unit (control unit) connector E125 and steering angle sensor connector M47.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness.
Self-diagnosis results
CONTROLLER FAILURE VARIANT CODING
Self-diagnosis results
ST ANG SEN CIRCUIT
ST ANG SEN COM CIR
ABS actuator and electric unit (con- trol unit) harness connector E125 Steering angle
sensor
harness con- nector M47 Continuity
11 3Yes
15 4Yes
WFIA0224E

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMSBRC-41
[VDC/TCS/ABS]
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Revision: November 2009 2006 QX56
4. CHECK DATA MONITOR
1. Connect steering angle sensor and ABS actuator and electric unit (control unit) connectors.
2. Use “DATA MONITOR ” to check if the status of "STR ANGLE SIG" is normal.
OK or NG
OK >> Perform ABS actuator and electric unit (control unit) self-diagnosis again.
NG >> Replace spiral cable (steering angle sensor) and adjust neutral position of steering angle sensor. Refer to BRC-62, "
Adjustment of Steering Angle Sensor Neutral Position" .
Yaw Rate/Side/Decel G Sensor System InspectionEFS004XV
CAUTION:
Sudden turns (such as spin turns, acceleration turns), drifting, etc. when VDC function is OFF may
cause the yaw rate/side/decel G sensor system to indicate a problem. This is not a problem if normal
operation can be resumed after restarting the engine.
INSPECTION PROCEDURE
1. SELF-DIAGNOSIS RESULT CHECK
Check self-diagnosis results.
CAUTION:
If vehicle is on turn table at entrance to parking garage, or on other moving surface, VDC OFF indica-
tor lamp may illuminate and CONSULT-II self-diagnosis may indicate yaw rate sensor system malfunc-
tion. However, in this case there is no malfunction in yaw rate sensor system. Take vehicle off of turn
table or other moving surface, and start engine. Results will return to normal.
Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO >> Inspection End.
2. CONNECTOR INSPECTION
Disconnect the ABS actuator and electric unit (control unit) connector E125 and yaw rate/side/decel G sensor
connector M108.
Check the terminals for deformation, disconnection, looseness or damage.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace as necessary.
Steering condition Data monitor
Straight-ahead –3.5 deg to +3.5 deg
Turn wheel to the right by 90 ° Approx. - 90deg
Turn wheel to the left by 90 ° Approx. + 90deg
Self-diagnosis results
YAW RATE SENSOR G-SENSOR
SIDE G-SEN CIRCUIT

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMSBRC-43
[VDC/TCS/ABS]
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Revision: November 2009 2006 QX56
Solenoid and VDC Change-Over Valve System InspectionEFS004XW
INSPECTION PROCEDURE
1. SELF-DIAGNOSIS RESULT CHECK
Check self-diagnosis results.
Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO >> Inspection End.
2. CONNECTOR INSPECTION
1. Disconnect ABS actuator and electric unit (control unit) connector E125.
2. Check the terminals for deformation, disconnection, looseness or damage.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace as necessary.
Self-diagnosis results FR LH IN ABS SOL
FR LH OUT ABS SOL RR RH IN ABS SOL
RR RH OUT ABS SOL FR RH IN ABS SOL
FR RH OUT ABS SOL RR LH IN ABS SOL
RR LH OUT ABS SOL CV 1
CV 2SV 1
SV 2

BRC-44
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Revision: November 20092006 QX56
3. CHECKING SOLENOID POWER AND GROUND
1. Check voltage between ABS actuator and electric unit (control unit) harness connector E125 and body ground.
2. Check resistance between ABS actuator and electric unit (con- trol unit) harness connector E125 and body ground.
OK or NG
OK >> Perform self-diagnosis again. If the same results appear, replace ABS actuator and electric unit (control
unit). Refer to BRC-66, "
Removal and Installation" .
NG >> Repair the circuit.
Actuator Motor, Motor Relay, and Circuit InspectionEFS004XX
INSPECTION PROCEDURE
1. CHECKING SELF-DIAGNOSIS RESULTS
Check self-diagnosis results.
Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO >> Inspection End.
2. CONNECTOR INSPECTION
1. Disconnect ABS actuator and electric unit (control unit) connector E125.
2. Check the terminals for deformation, disconnection, looseness or damage.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace as necessary. ABS actuator and electric
unit (control unit)connector E125 Body
ground Measured
value
(Approx.)
32 — 12V
WFIA0195E
ABS actuator and electric unit (control unit)connector E125 Body
ground Measured
value Ω
(Approx.)
16 —0Ω
47 —0Ω
WFIA0196E
Self-diagnosis results
PUMP MOTOR
ACTUATOR RLY

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMSBRC-45
[VDC/TCS/ABS]
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Revision: November 2009 2006 QX56
3. CHECKING ABS MOTOR AND MOTOR RELAY POWER SYSTEM
1. Check voltage between ABS actuator and electric unit (control unit) harness connector E125 and body ground.
2. Check resistance between ABS actuator and electric unit (con- trol unit) connector E125 and body ground.
OK or NG
OK >> Perform self-diagnosis again. If the same results appear, replace ABS actuator and electric unit (control
unit). Refer to BRC-66, "
Removal and Installation" .
NG >> Repair the circuit.
Stop Lamp Switch System InspectionEFS004XY
INSPECTION PROCEDURE
1. SELF-DIAGNOSIS RESULT CHECK
Check self-diagnosis results.
Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO >> Inspection End.
2. CONNECTOR INSPECTION
1. Disconnect the ABS actuator and electric unit (control unit) connector E125 and stop lamp switch connec- tor E38.
2. Check the terminals for deformation, disconnection, looseness or damage.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace as necessary. ABS actuator and electric
unit (control unit)connector E125 Body
ground Measured
value
(Approx.)
1—1 2V
WFIA0209E
ABS actuator and electric
unit (control unit)
harness connector E125 Body
ground Measured
value Ω
(Approx.)
16 —0Ω
47 —0Ω
WFIA0196E
Self-diagnosis results
STOP LAMP SW