turn signal INFINITI QX56 2004 Factory Service Manual

AUTOMATIC BACK DOOR SYSTEM
BL-127
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Back Door Handle Switch System InspectionEIS002TB
1. BACK DOOR HANDLE SWITCH SIGNAL INSPECTION
1. Turn ignition switch OFF.
2. While operating the back door handle switch, check voltage
between back door control unit connector B55 terminal 26 and
ground.
OK or NG
OK >> Switch is OK.
NG >> GO TO 2.
2. BACK DOOR HANDLE SWITCH CIRCUIT INSPECTION
1. Disconnect back door handle switch and back door control unit.
2. Check continuity between back door control unit connector (A)
B55 terminal 26 and back door handle switch connector (B)
D706 terminal 3.
3. Check continuity between back door handle switch connector
(B) D706 terminal 3 and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness.
3. BACK DOOR HANDLE SWITCH GROUND INSPECTION
Check continuity between back door handle switch connector D706
terminal 4 and ground.
OK or NG
OK >> Replace the back door handle switch.
NG >> Repair or replace harness.
Connector terminal
(Wire color)
ConditionVoltage (V)
(Approx.)
( + ) ( - )
26 (V) GroundBack door handle switch (ON) 0
Other (OFF) 5
LIIA0833E
3 (V) - 26 (V) : Continuity should exist.
3 (V) - 26 (V) : Continuity should not exist.
LIIA2262E
4 (B) - Ground : Continuity should exist.
WIIA0605E

BL-128
AUTOMATIC BACK DOOR SYSTEM
Revision: August 20072004 QX56
Cinch Latch Motor System InspectionEIS002TC
1. CINCH LATCH MOTOR CIRCUIT INSPECTION
1. Turn ignition switch OFF.
2. Disconnect back door latch and back door control unit.
3. Check continuity between back door control unit connector (A)
B55 terminals 11, 12 and back door latch (cinch latch motor)
connector (B) D503 terminals 1, 2.
4. Check continuity between back door latch (cinch latch motor)
connector (B) D503 terminals 1, 2 and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace harness.
2. CINCH LATCH MOTOR OPERATION INSPECTION
Connect battery power to terminals 1 and 2 on the back door latch
and check motor operation.
OK or NG
OK >> GO TO 3.
NG >> Replace the back door latch.
3. CINCH LATCH MOTOR SIGNAL INSPECTION
1. Reconnect back door latch and back door control unit.
2. While fully opening and closing the back door, check voltage
between back door control unit connector B55 terminals 11, 12
and ground.
OK or NG
OK >> Cinch latch motor circuit is OK.
NG >> Replace the back door control unit.1 (L) - 12 (L) : Continuity should exist.
2 (Y) - 11 (Y) : Continuity should exist.
1 (L) - ground : Continuity should not exist.
2 (Y) - ground : Continuity should not exist.
LIIA2263E
1 (+) - 2 (-) : It operates.
1 (-) - 2 (+) : It operates. (Reverse rotation)
LIIA1937E
11 (Y) - Ground
12 (L) - Ground
LIIA0836ESIIA1480E

BL-148
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)
Revision: August 20072004 QX56
Diagnostic Procedure 1EIS002TU
Self-diagnostic results:
“CHAIN OF ECM-IMMU” displayed on CONSULT-II screen
First perform the “SELF-DIAG RESULTS” in “BCM” with CONSULT-II, then perform the trouble diagno-
sis of malfunction system indicated “SELF-DIAG RESULTS” of “BCM”. Refer to BL-142, "
CONSULT-II"
.
1. CONFIRM SELF-DIAGNOSTIC RESULTS
Confirm SELF-DIAGNOSTIC RESULTS “CHAIN OF ECM-IMMU”
displayed on CONSULT-II screen.
NOTE:
In rare case, “CHAIN OF ECM-IMMU” might be stored during key
registration procedure, even if the system is not malfunctioning.
Is CONSULT-II screen displayed as above?
Yes >> GO TO 2.
No >> GO TO BL-146, "
SYMPTOM MATRIX CHART 1" .
2. CHECK POWER SUPPLY CIRCUIT FOR BCM
1. Disconnect BCM.
2. Check voltage between BCM connector M20 terminal 70 and ground.
OK or NG
OK >> GO TO 3.
NG >> Check the following:

50A fusible link (letter f , located in fuse and fusible
link box)

Harness for open or short between fuse and BCM
connector
Ref. Part No. C1
3. CHECK IGN SW. ON SIGNAL
1. Turn ignition switch ON.
2. Check voltage between BCM connector M18 terminal 38 and ground.
OK or NG
OK >> GO TO 4.
NG >> Check the following:

10A fuse [No. 59, located in the fuse and relay box]

Harness for open or short between fuse and BCM
connector
Ref. part No. C2
PIIA1260E
70 (W/B) - Ground : Battery voltage
LIIA1071E
38 (W/L) - Ground : Battery voltage
LIIA0527E

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)
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Revision: August 20072004 QX56
4. CHECK POWER SUPPLY FOR NATS ANTENNA AMP.
1. Turn ignition switch ON.
2. Check voltage between NATS antenna amp. connector M21 terminal 1 and ground.
OK or NG
OK >> GO TO 5.
NG >> Repair or replace fuse or harness. Ref. part No. E3
5. CHECK NATS ANTENNA AMP. SIGNAL LINE- 1
Check voltage between NATS antenna amp. connector M21 terminal
2 and ground with analog tester.
OK or NG
OK >> GO TO 6.
NG >>

Repair or replace harness. Ref. part No. E1
NOTE:
If harness is OK, replace BCM, refer to BCS-19, "
Removal and Installation of BCM" . Perform
initialization with CONSULT-II. For initialization, refer to “CONSULT-II Operation Manual NATS-
IVIS/NVIS”. 1 (W) - Ground : Battery voltage
LIIA1498E
LIIA1642E
Connector terminals
(wire colors)
Position of ignition key cylinderVoltage (V)
(Approx.)
( + ) ( - )
2 (G) GroundBefore inserting ignition key Battery voltage
After inserting ignition keyPointer of tester should move for approx. 30 seconds,
then return to battery voltage
Just after turning ignition
switch ONPointer of tester should move for approx. 1 second,
then return to battery voltage

BL-154
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)
Revision: August 20072004 QX56
6. CHECK NATS ANTENNA AMP. SIGNAL LINE- 2
Check voltage between NATS antenna amp. connector M21 terminal
4 and ground with analog tester.
OK or NG
OK >> GO TO 7.
NG >>

Repair or replace harness. Ref. part No. E2
NOTE:
If harness is OK, replace BCM, refer to BCS-19, "
Removal and Installation of BCM" . Perform
initialization with CONSULT-II. For initialization, refer to “CONSULT-II Operation Manual NATS-
IVIS/NVIS”.
7. CHECK NATS ANTENNA AMP. GROUND LINE CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect NATS antenna amp.
3. Check continuity between NATS antenna amp. connector M21 terminal 3 and ground.
OK or NG
OK >> NATS antenna amp. is malfunctioning. Ref. part No. E6
NG >>

Repair or replace harness.
NOTE:
If harness is OK, replace BCM, perform initialization
with CONSULT-II. For initialization, refer to “CON-
SULT-II Operation Manual NATS-IVIS/NVIS”.
LIIA1643E
Connector terminals
(wire colors)
Position of ignition key cylinderVoltage (V)
(Approx.)
( + ) ( - )
4 (BR) GroundBefore inserting ignition key Battery voltage
After inserting ignition keyPointer of tester should move for approx. 30 seconds,
then return to battery voltage
Just after turning ignition
switch ONPointer of tester should move for approx. 1 second,
then return to battery voltage
3 (B) - Ground : Continuity should exist.
LIIA1283E

SYSTEM DESCRIPTION
BRC-9
[VDC/TCS/ABS]
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ABS/EBD SYSTEM
In case of an electrical malfunction with the ABS, the ABS warning lamp, VDC OFF indicator lamp and SLIP
indicator lamp will turn on. In case of an electrical malfunction with the EBD system, the BRAKE warning lamp,
ABS warning lamp, VDC OFF indicator lamp and SLIP indicator lamp will turn on.
The system will revert to one of the following conditions of the Fail-Safe function.
1. For ABS malfunction, only the EBD is operative and the condition of the vehicle is the same condition of
vehicles without ABS/TCS/VDC system.
2. For EBD malfunction, the EBD and ABS become inoperative, and the condition of the vehicle is the same
as the condition of vehicles without ABS/TCS/VDC or EBD system.
VDC/TCS SYSTEM
In case of TCS/VDC system malfunction, the VDC OFF indicator lamp and SLIP indicator lamp are turned on
and the condition of the vehicle is the same as the condition of vehicles without TCS/VDC system. In case of
an electrical malfunction with the TCS/VDC system, the ABS control continues to operate normally without
TCS/VDC control.
ACTIVE BOOSTER
The active brake booster consists of a vacuum booster, an active booster control group and a delta stroke
sensor. In case of brake booster system malfunction due to loss of vacuum, the delta stroke sensor will signal
the ABS actuator and electric unit (control unit) that a booster failure has occurred. The active booster then
applies supplemental force to the master cylinder relative to the amount of force exerted on the brake pedal.
Hydraulic Circuit DiagramEFS003QO
WFIA0187E

BRC-24
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: August 20072004 QX56
Warning Lamp and Indicator TimingEFS003QV
X: ON
—: OFF
Control Unit Input/Output Signal StandardEFS003QW
REFERENCE VALUE FROM CONSULT-II
CAUTION:
The display shows the control unit calculation data, so a normal value might be displayed even in the
event the output circuit (harness) is open or short circuited.
ConditionABS
warning lampVDC OFF
indicator lampSLIP
indicator lampRemarks
When the ignition switch is OFF — — — —
After the ignition switch is turned
ON for approx. 1 second×××—
After the ignition switch is turned
ON for approx. 2 seconds———Lamp goes off approx. 2 seconds
after the engine is started.
When the VDC OFF switch is
pressed (VDC function OFF)—×——
ABS/TCS/VDC malfunction×××—
××—When the ABS actuator and elec-
tric unit (control unit) is malfunc-
tioning (power supply or ground
malfunction).
When the VDC is malfunctioning —××—
Monitor item Display contentData monitor
Note: Error inspection
checklist
ConditionReference value in
normal operation
N POSI SIGPNP switch signal ON/
OFF conditionA/T shift position = N position ON
BRC-54, "
CAN Commu-
nication System Inspec-
tion"A/T shift position = other than
N positionsOFF
P POSI SIGPNP switch signal ON/
OFF conditionA/T shift position P position ON
BRC-54, "
CAN Commu-
nication System Inspec-
tion"A/T shift position = other than
P positionsOFF
GEAR A/T gear position1st gear 1
— 2nd gear 2
3rd gear 3
4th gear 4
5th gear 5
FR RH SENSOR
FR LH SENSOR
RR RH SENSOR
RR LH SENSORWheel speedVehicle stopped 0 [km/h (MPH)]
BRC-38, "
Wheel Sensor
System Inspection"Vehicle running (Note 1)Almost in accor-
dance with speed-
ometer display
(within ±10%)
ACCEL POS SIG Open/close condition
of throttle valve (linked
with accelerator pedal).Accelerator pedal not
depressed (ignition switch is
ON)0%
BRC-54, "
CAN Commu-
nication System Inspec-
tion"Depress accelerator pedal
(ignition switch is ON)0 to 100%
ENGINE SPEED With engine runningWith engine stopped 0 rpm
BRC-39, "
Engine System
Inspection"Engine runningAlmost in accor-
dance with
tachometer display

BRC-26
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: August 20072004 QX56
Note 1: Confirm tire pressure is normal.
Note 2: ON/OFF timing of ABS warning lamp
ON: For approximately 2 seconds after ignition switch is turned ON, or when a malfunction is detected.
OFF: Approximately 2 seconds after ignition switch is turned ON (when system is in normal operation) and TCS/VDC function is not
activated.
Note 3: ON/OFF timing of VDC OFF indicator lamp
ON: For approximately 2 seconds after ignition switch is turned ON, or when a malfunction is detected and VDC OFF switch is ON.
OFF: Approximately 2 seconds after ignition switch is turned ON (when system is in normal operation.) And when VDC OFF switch is
OFF.
Note 4: SLIP indicator lamp ON/OFF timing
ON: For approximately 2 seconds after ignition switch is turned ON, or when a malfunction is detected and TCS/VDC function is acti-
vated while driving.FR LH IN SOL
FR LH OUT SOL
FR RH IN SOL
FR RH OUT SOL
RR RH IN SOL
RR RH OUT SOL
RR LH IN SOL
RR LH OUT SOLSolenoid valve opera-
tionActuator (solenoid) is active
(“ACTIVE TEST” with CON-
SULT-II) or actuator relay is
inactive (in fail-safe mode).ON
BRC-43, "
Solenoid and
VDC Change-Over Valve
System Inspection"
When actuator (solenoid) is
not active and actuator relay is
active (ignition switch ON).OFF
CV1
CV2
SV1
SV2VDC switch-over valve
statusWhen actuator (switch-over
valve) is active (“ACTIVE
TEST” with CONSULT-II) or
actuator relay is inactive (when
in fail-safe mode).ON
When actuator (switch-over
valve) is not active and actua-
tor relay is active (ignition
switch ON).OFF
DECEL G-SENLongitudinal accelera-
tion detected by Decel
G-SensorVehicle stopped Approx. 0 GBRC-41, "
Ya w R a te / S i d e /
Decel G Sensor System
Inspection"Vehicle running -1.7 to 1.7 G
PRESS SENSORBrake fluid pressure
detected by pressure
sensorDo not step on the Brake pedal
(When ignition switch is ON)Approx. 0 bar
—
Step on the Brake pedal
(When ignition switch is ON)-40 to 300 bar
FLUID LEV SWON/OFF status of
brake fluid level switchWhen brake fluid level switch
ONON
DI-31, "
WAR NIN G
LAMPS"When brake fluid level switch
OFF OFF
VDC SIGNAL
TCS SIGNAL
ABS SIGNAL
EBD SIGNALSignal statusVDC active
TCS active
ABS active
EBD activeON
VDC system
TCS system
ABS system
EBD system VDC not active
TCS not active
ABS not active
EBD not activeOFF
VDC FAIL SIG
TCS FAIL SIG
ABS FAIL SIG
EBD FAIL SIGFail signal statusVDC fail
TCS fail
ABS fail
EBD failON
VDC system
TCS system
ABS system
EBD system VDC normal
TCS normal
ABS normal
EBD normalOFF Monitor item Display contentData monitor
Note: Error inspection
checklist
ConditionReference value in
normal operation

BRC-28
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: August 20072004 QX56
CONSULT-II Function (ABS)EFS003QX
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
CONSULT-II BASIC OPERATION PROCEDURE
1. Turn ignition switch OFF.
2. Connect CONSULT-II and CONSULT-II CONVERTER to the
data link connector.
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II
CONVERTER, malfunctions might be detected in self-diag-
nosis depending on control unit which carries out CAN
communication.
3. Turn ignition switch ON.
4. Touch “START (NISSAN BASED VHCL)”.
5. Touch “ABS” in the “SELECT SYSTEM” screen.
If “ABS” is not indicated, go to GI-39, "
CONSULT-II Data Link
Connector (DLC) Circuit" .
ABS diagnostic mode Description
WORK SUPPORTSupports inspection and adjustments. Commands are transmitted to the ABS actuator and electric
unit (control unit) for setting the status suitable for required operation, input/output signals are
received from the ABS actuator and electric unit (control unit) and received data is displayed.
SELF-DIAG RESULTS Displays ABS actuator and electric unit (control unit) self-diagnosis results.
DATA MONITOR Displays ABS actuator and electric unit (control unit) input/output data in real time.
CAN DIAG SUPPORT MNTR The result of transmit/receive diagnosis of CAN communication can be read.
ACTIVE TEST Operation of electrical loads can be checked by sending drive signal to them.
FUNCTION TESTConducted by CONSULT-II instead of a technician to determine whether each system is "OK" or
"NG".
ECU PART NUMBER ABS actuator and electric unit (control unit) part number can be read.
BBIA0369E
BCIA0029E
BCIA0030E

TROUBLE DIAGNOSIS
BRC-31
[VDC/TCS/ABS]
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Revision: August 20072004 QX56
FR LH IN ABS SOL
[C1120]Circuit of front LH IN ABS solenoid is open or shorted, or control
line is open or shorted to power supply or ground.
BRC-43, "
Solenoid and
VDC Change-Over Valve
System Inspection"
FR LH OUT ABS SOL
[C1121]Circuit of front LH OUT ABS solenoid is open or shorted, or con-
trol line is open or shorted to power supply or ground.
RR RH IN ABS SOL
[C1126]Circuit of rear RH IN ABS solenoid is open or shorted, or control
line is open or shorted to power supply or ground.
RR RH OUT ABS SOL
[C1127]Circuit of rear RH OUT ABS solenoid is open or shorted, or con-
trol line is open or shorted to power supply or ground.
FR RH IN ABS SOL
[C1122]Circuit of front RH IN ABS solenoid is open or shorted, or control
line is open or shorted to power supply or ground.
FR RH OUT ABS SOL
[C1123]Circuit of front RH OUT ABS solenoid is open or shorted, or con-
trol line is open or shorted to power supply or ground.
RR LH IN ABS SOL
[C1124]Circuit of rear LH IN ABS solenoid is open or shorted, or control
line is open or shorted to power supply or ground.
RR LH OUT ABS SOL
[C1125] Circuit of rear LH OUT ABS solenoid is open or shorted, or con-
trol line is open or shorted to power supply or ground.
CV1
[C1164]Front side VDC switch-over solenoid valve (cut valve) is open or
shorted, or control line is open or shorted to power supply or
ground.
CV2
[C1165]Rear side VDC switch-over solenoid valve (cut valve) is open or
shorted, or control line is open or shorted to power supply or
ground.
SV1
[C1166]Front side VDC switch-over solenoid valve (suction valve) is
open or shorted, or control line is open or shorted to power sup-
ply or ground.
SV2
[C1167]Rear side VDC switch-over solenoid valve (suction valve) is open
or shorted, or control line is open or shorted to power supply or
ground.
PUMP MOTOR (Note 3)
[ C 1111 ]During actuator motor operation with ON, when actuator motor
turns OFF or when control line for actuator motor relay is open.BRC-44, "
Actuator
Motor, Motor Relay, and
Circuit Inspection"During actuator motor operation with OFF, when actuator motor
turns ON or when control line for relay is shorted to ground.
BATTERY VOLTAGE
[ABNORMAL]
[C1109]ABS actuator and electric unit (control unit) power voltage is too
low.BRC-46, "
ABS/TCS/
VDC Control Unit Power
and Ground Systems
Inspection"
ST ANGLE SEN SIGNAL
[C1144]Neutral position correction of steering angle sensor is not fin-
ished.BRC-55, "
Inspection For
Self-diagnosis Result
"ST ANGLE SEN SIG-
NAL""
ST ANG SEN COM CIR
[C1156]CAN communication line or steering angle sensor has generated
an error.BRC-40, "Steering Angle
Sensor System"
G-SENSOR
[ C 111 3 ]Longitudinal G-sensor is malfunctioning, or signal line of longitu-
dinal G-sensor is open or shorted.BRC-41, "Yaw Rate/
Side/Decel G Sensor
System Inspection"
CONTROLLER FAILURE
[ C 111 0 ]Internal malfunction of ABS actuator and electric unit (control
unit)BRC-40, "ABS/TCS/
VDC Control Unit
Inspection"
CAN COMM CIRCUIT
[U1000]

CAN communication line is open or shorted.

ABS actuator and electric unit (control unit) internal malfunc-
tion

Battery voltage for ECM is suddenly interrupted for approxi-
mately 0.5 second or more.BRC-54, "
CAN Commu-
nication System Inspec-
tion" (Note 2) Self-diagnostic item Malfunction detecting condition Check system