ignition INFINITI QX56 2006 Factory Service Manual

LT-88
TURN SIGNAL AND HAZARD WARNING LAMPS
Revision: November 20092006 QX56
How to Proceed With Trouble DiagnosisEKS00B9U
1. Confirm the symptom or customer complaint.
2. Understand operation description and function description. Refer to LT- 8 0 , "
System Description" .
3. Perform preliminary check. Refer to LT- 8 9 , "
Preliminary Check" .
4. Check symptom and repair or replace the cause of malfunction.
5. Do turn signal and hazard warning lamps operate normally? If YES: GO TO 6. If NO: GO TO 4.
6. Inspection End.
34 L Combination switch output 3 ON Lighting, turn, wiper OFF
Wiper dial position 4
35 O/B Combination switch output 2 ONLighting, turn, wiper OFF
Wiper dial position 4
36 R/W Combination switch output 1
38 W/L Ignition switch (ON) ON— Battery voltage
39 L CAN-H —— —
40 P CAN-L —— —
60 G/B Turn signal (left) ONCombination
switch Turn left ON
61 G/Y Turn signal (right) ONCombination
switch Turn right ON
67 B Ground ON— 0V
70 W/B Battery power supply OFF— Battery voltage
Terminal
No. Wire
color Signal name Measuring condition
Reference value
(Approx.)
Ignition
switch Operation or condition
SKIA5291E
SKIA5292E
SKIA3009J
SKIA3009J

TURN SIGNAL AND HAZARD WARNING LAMPSLT-89
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Revision: November 2009 2006 QX56
Preliminary CheckEKS00B9V
CHECK POWER SUPPLY AND GROUND CIRCUIT
1. CHECK FUSES OR FUSIBLE LINK
Check for blown fuses or fusible link.
Refer to LT- 8 4 , "
Wiring Diagram — TURN —" .
OK or NG
OK >> GO TO 2.
NG >> If fuse or fusible link is blown, be sure to eliminate cause of malfunction before installing new fuse or fusible link. Refer to PG-4, "
POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Disconnect BCM connectors.
2. Check voltage between BCM harness connector and ground.
OK or NG
OK >> GO TO 3.
NG >> Check harness for open between BCM and fuse or fus- ible link.
3. CHECK GROUND CIRCUIT
Check continuity between BCM harness connector and ground.
OK or NG
OK >> Inspection End.
NG >> Check ground circuit harness.
Unit Power sourceFuse and fusible link No.
BCM Battery
f
Ignition switch ON or START position 59
BCMIgnition switch position
(+) (– )OFFACCON
Connector Terminal
M18 38 Ground0V 0V
Battery
voltage
M20 70 Battery
voltage Battery
voltage Battery
voltage
WKIA1436E
BCM Continuity
Connector Terminal
M20 67Ground Yes
LIIA0915E

LT-90
TURN SIGNAL AND HAZARD WARNING LAMPS
Revision: November 20092006 QX56
CONSULT-II Function (BCM)EKS00B9W
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
CONSULT-II OPERATION
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.
1. With the ignition switch OFF, connect CONSULT-II and CON-
SULT-II CONVERTER to the data link connector, then turn igni-
tion switch ON.
2. Touch "START (NISSAN BASED VHCL)".
3. Touch "BCM" on "SELECT SYSTEM" screen. If "BCM" is not indicated, go to GI-40, "
CONSULT-II Data Link
Connector (DLC) Circuit" .
BCM diagnostic
test item Diagnostic mode
Description
Inspection by part WORK SUPPORT
Supports inspections and adjustments. Commands are transmitted to the BCM
for setting the status suitable for required operation, input/output signals are
received from the BCM and received data is displayed.
DATA MONITOR Displays BCM input/output data in real time. ACTIVE TEST Operation of electrical loads can be checked by sending drive signal to them.
SELF-DIAG RESULTS Displays BCM self-diagnosis results.
CAN DIAG SUPPORT MNTR The result of transmit/receive diagnosis of CAN communication can be read. ECU PART NUMBER BCM part number can be read.CONFIGURATION Performs BCM configuration read/write functions.
BBIA0369E
BCIA0029E
BCIA0030E

TURN SIGNAL AND HAZARD WARNING LAMPSLT-91
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Revision: November 2009 2006 QX56
4. Touch "FLASHER" on "SELECT TEST ITEM" screen.
DATA MONITOR
Operation Procedure
1. Touch "FLASHER" on "SELECT TEST ITEM" screen.
2. Touch "DATA MONITOR" on "SELECT DIAG MODE" screen.
3. Touch either "ALL SIGNALS" or "SELECTION FROM MENU" on the "SELECT MONITOR ITEM" screen.
4. Touch "START".
5. When "SELECTION FROM MENU" is selected, touch items to be monitored. When "ALL SIGNALS" is
selected, all the items will be monitored.
6. Touch "RECORD" while monitoring, then the status of the monitored item can be recorded. To stop recording, touch "STOP".
Display Item List
ACTIVE TEST
Operation Procedure
1. Touch "FLASHER" on "SELECT TEST ITEM" screen.
2. Touch "ACTIVE TEST" on "SELECT DIAG MODE" screen.
3. Touch item to be tested and check operation of the selected item.
4. During the operation check, touching "BACK" or "OFF" deactivates the operation.
Display Item List
LKIA0183E
ALL SIGNALS Monitors all the signals.
SELECTION FROM MENU Selects and monitors the individual signal.
Monitor item Contents
IGN ON SW "ON/OFF" Displays "IGN position (ON)/OFF, ACC position (OFF)" judged from the ignition switch signal.
HAZARD SW "ON/OFF" Displays "Hazard ON (ON)/Hazard OFF (OFF)" status, determined from hazard switch signal.
TURN SIGNAL R "ON/OFF" Displays "Turn right (ON)/Other (OFF)" status, determined from lighting switch signal.
TURN SIGNAL L "ON/OFF" Displays "Turn left (ON)/Other (OFF)" status, determined from lighting switch signal.
BRAKE SW "ON/OFF" Displays status of stop lamp switch.
Test item Description
FLASHER (RH) Turn signal lamp (right) can be operated by any ON-OFF operations.
FLASHER (LH) Turn signal lamp (left) can be operated by any ON-OFF operations.

LT-92
TURN SIGNAL AND HAZARD WARNING LAMPS
Revision: November 20092006 QX56
Front Turn Signal Lamp Does Not OperateEKS00B9X
1. CHECK COMBINATION SWITCH INPUT SIGNAL
With CONSULT-II
Select "BCM" on CONSULT-II. With "FLASHER" data monitor, make
sure "TURN SIGNAL R" and "TURN SIGNAL L" turns ON-OFF
linked with operation of lighting switch.
Without CONSULT-II
Refer to LT- 1 0 3 , "
Combination Switch Inspection" .
OK or NG
OK >> GO TO 2.
NG >> Check lighting switch. Refer to LT- 1 0 3 , "
Combination Switch Inspection" .
2. ACTIVE TEST
With CONSULT-II
1. Select "FLASHER" during active test. Refer to LT- 9 1 , "
ACTIVE
TEST" .
2. Make sure "FLASHER RH" and "FLASHER LH" operate.
Without CONSULT-II
GO TO 3.
OK or NG
OK >> Replace BCM. Refer to BCS-20, "BCM" .
NG >> GO TO 3.
3. CHECK TURN SIGNAL LAMPS CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector and front turn/fog lamp LH and RH connectors.
3. Check continuity between BCM harness connector M20 terminal 60 and front turn/fog lamp LH harness connector E101 terminal
2.
4. Check continuity between BCM harness connector M20 terminal 61 (G/Y) and front turn/fog lamp RH harness connector E102
terminal 2 (G/Y).
OK or NG
OK >> GO TO 4.
NG >> Repair harness or connector. When lighting switch is in
TURN RH position
: TURN SIGNAL R ON
When lighting switch is in
TURN LH position : TURN SIGNAL L ON
SKIA4499E
SKIA6190E
60 - 2
: Continuity should exist.
61 - 2 : Continuity should exist.
WKIA1890E

LT-94
TURN SIGNAL AND HAZARD WARNING LAMPS
Revision: November 20092006 QX56
3. CHECK TURN SIGNAL LAMPS CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector and door mirror LH/RH connector.
3. Check continuity between BCM harness connector M20 (A) ter- minal 60 (LH), 61 (RH) and door mirror harness connector (LH
D4), (RH D107) (B) terminal 15.
OK or NG
OK >> GO TO 4.
NG >> Repair harness or connector.
4. CHECK GROUND
1. Check continuity between door mirror harness connector (LH D4), (RH D107) terminal 11 and ground.
OK or NG
OK >> Replace door mirror turn signal.
NG >> Repair harness or connector.
Rear Turn Signal Lamp Does Not OperateEKS00B9Y
1. CHECK BULB
Check bulb standard of each turn signal lamp is correct. Refer to LT- 1 7 5 , "
Exterior Lamp" .
OK or NG
OK >> GO TO 2.
NG >> Replace turn signal lamp bulb. Refer to LT- 1 2 5 , "
Bulb Replacement" .
2. CHECK TURN SIGNAL LAMPS CIRCUIT
1. Disconnect BCM connector and rear combination lamp connec- tor.
2. Check continuity between BCM harness connector M20 (A) ter- minal 61 and rear combination lamp RH harness connector
B105 (B) terminal 4.
3. Check continuity between BCM harness connector M20 (A) ter- minal 60 and rear combination lamp LH harness connector B35
(B) terminal 4.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector. 60, 61 - 15
: Continuity should exist.
WKIA4524E
11 - Ground: Continuity should exist.
WKIA4525E
61 - 4: Continuity should exist.
60 - 4 : Continuity should exist.
WKIA4694E

LT-96
TURN SIGNAL AND HAZARD WARNING LAMPS
Revision: November 20092006 QX56
3. CHECK HAZARD SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector and hazard switch connector.
3. Check continuity between BCM harness connector M18 terminal 29 and hazard switch harness connector M55 terminal 2.
OK or NG
OK >> GO TO 4.
NG >> Repair harness or connector.
4. CHECK GROUND
Check continuity between hazard switch harness connector M55 ter-
minal 1 and ground.
OK or NG
OK >> GO TO 5.
NG >> Repair harness or connector.
5. CHECK HAZARD SWITCH
1. Disconnect hazard switch connector.
2. Check continuity of hazard switch.
OK or NG
OK >> Replace BCM if hazard warning lamps do not work after setting the connector again. Refer to BCS-20, "
BCM" .
NG >> Replace hazard switch. Refer to LT- 9 9 , "
Removal and Installation" .
Turn Signal Indicator Lamp Does Not OperateEKS00BA0
1. CHECK CAN COMMUNICATION SYSTEM
Check CAN communication. Refer to LAN-26, "
CAN COMMUNICATION" .
OK or NG
OK >> Replace combination meter. Refer to IP-13, "COMBINATION METER" .
NG >> Repair as necessary. 29 - 2 : Continuity should exist.
WKIA1894E
1 - Ground
: Continuity should exist.
WKIA1895E
Hazard switch
ConditionContinuity
Terminal
12 Hazard switch is ON
Yes
Hazard switch is OFF No
WKIA1896E

COMBINATION SWITCHLT-101
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Revision: November 2009 2006 QX56
Combination Switch Reading FunctionEKS00BA8
For details, refer to BCS-3, "COMBINATION SWITCH READING FUNCTION" .
CONSULT-II Function (BCM)EKS00BA9
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
CONSULT-II OPERATION
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.
1. With the ignition switch OFF, connect CONSULT-II and CON-
SULT-II CONVERTER to the data link connector, then turn igni-
tion switch ON.
2. Touch "START (NISSAN BASED VHCL)".
3. Touch "BCM" on "SELECT SYSTEM" screen. If "BCM" is not indicated, go to GI-40, "
CONSULT-II Data Link
Connector (DLC) Circuit" .
BCM diagnostic
test item Diagnostic mode
Description
Inspection by part WORK SUPPORT
Supports inspections and adjustments. Commands are transmitted to the BCM
for setting the status suitable for required operation, input/output signals are
received from the BCM and received data is displayed.
DATA MONITOR Displays BCM input/output data in real time. ACTIVE TEST Operation of electrical loads can be checked by sending drive signal to them.
SELF-DIAG RESULTS Displays BCM self-diagnosis results.
CAN DIAG SUPPORT MNTR The result of transmit/receive diagnosis of CAN communication can be read. ECU PART NUMBER BCM part number can be read.CONFIGURATION Performs BCM configuration read/write functions.
BBIA0369E
BCIA0029E
BCIA0030E

LT-104
COMBINATION SWITCH
Revision: November 20092006 QX56
3. HARNESS INSPECTION
1. Turn ignition switch OFF.
2. Disconnect BCM and combination switch connectors.
3. Check for continuity between BCM harness connector of the suspect system and the corresponding com- bination switch connector terminals.
4. Check for continuity between each terminal of BCM harness connector in suspect malfunctioning system and ground.
OK or NG
OK >> GO TO 4.
NG >> Check harness between BCM and combination switch for open or short circuit.
Sus- pect
system Terminals
Continuity
BCM Combination switch
Connector Terminal Connector Terminal
1
M18 Input 1 6
M286
Ye s
Output 1 36 1
2 Input 2 5 7
Output 2 35 2
3 Input 3 4
10
Output 3 34 3
4 Input 4 3
9
Output 4 33 4
5 Input 5 2
8
Output 5 32 5
Suspect system Terminals
Continuity
BCM
Connector Terminal
1
M18 Input 1
6
Ground No
Output 1
36
2 Input 2
5
Output 2 35
3 Input 3
4
Output 3 34
4 Input 4
3
Output 4 33
5 Input 5
2
Output 5 32
LKIA0284E

COMBINATION SWITCHLT-105
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Revision: November 2009 2006 QX56
4. BCM OUTPUT TERMINAL INSPECTION
1. Turn lighting switch and wiper switch to OFF.
2. Set wiper dial to position 4.
3. Connect BCM and combination switch connectors.
4. Turn ignition switch on.
5. Check BCM output terminal voltage waveform of suspect mal- functioning system.
OK or NG
OK >> Open circuit in combination switch, GO TO 5.
NG >> Replace BCM. Refer to BCS-20, "
BCM" .
5. COMBINATION SWITCH INSPECTION
Referring to table below, perform combination switch inspection.
>> Inspection End.
Removal and InstallationEKS00BAB
Refer to LT- 9 8 , "Removal and Installation" .
Switch Circuit InspectionEKS00BAC
Refer to LT- 1 0 3 , "Combination Switch Inspection" .
Suspect system Terminals
Combination switch (+)
Connector Terminal
1
M28Input 1
1
2 Input 22
3 Input 33
4 Input 44
5 Input 55
SKIA4976E
Procedure
12 34567
Replace lighting
switch. Confirm
check
results. OK INSPECTION END
Confirm
check
results.OK INSPECTION END
Confirm
check
results.OK INSPECTION END
NG Replace wiper
switch.
NGReplace switch
base.
NGConfirm symptom
again.