2010 INFINITI QX56 Ignition switch

EXL-20
< FUNCTION DIAGNOSIS >
DIAGNOSIS SYSTEM (BCM)
FLASHER
FLASHER : CONSULT-III Function (BCM - FLASHER)INFOID:0000000005369884
DATA MONITOR
ACTIVE TEST
COMB SW
COMB SW : CONSULT-III Function (BCM - COMB SW)INFOID:0000000005369885
DATA MONITOR
Test ItemOperation Description
TA I L L A M P ON
Transmits the position light reques
t signal to IPDM E/R with CAN com-
munication to turn the tail lamp ON.
OFF Stops the tail lamp request signal transmission.
HEAD LAMP HI
Transmits the high beam request signal with CAN communication to turn
the headlamp (HI).
LO Transmits the low beam request signal with CAN communication to turn
the headlamp (LO).
OFF Stops the high & low beam request signal transmission.
FR FOG LAMP ON
Transmits the front fog lights request signal to IPDM E/R with CAN com-
munication to turn the front fog lamp ON.
OFF Stops the front fog lights request signal transmission.
CARGO LAMP ON
Transmits the cargo lamp request signal with CAN communication to
turn the lamp ON.
OFF Stops the cargo lamp request signal transmission.
CORNERING LAMP LH
Transmits the LH cornering lamp request signal with CAN communica-
tion to turn the lamp ON.
RH Transmits the RH cornering lamp request signal with CAN communica-
tion to turn the lamp ON.
OFF Stops the day time running light request signal transmission.
Monitor Item [Unit] Description
IGN ON SW [ON/OFF] Ignition switch (ON) status judged from IGN signal (ignition power supply)
HAZARD SW [ON/OFF] The switch status input from the hazard switch
TURN SIGNAL R [ON/OFF] Each switch condition that BCM judges from the combination switch reading function
TURN SIGNAL L [ON/OFF]
BRAKE SW [ON/OFF] The switch status input from the brake switch
Test ItemOperation Description
FLASHER RH Outputs the voltage to turn the right side turn signal lamps ON.
LH Outputs the voltage to turn the left side turn signal lamps ON.
OFF Stops the voltage to turn the turn signal lamps OFF.
Revision: April 20092010 QX56

EXL-22
< FUNCTION DIAGNOSIS >
DIAGNOSIS SYSTEM (IPDM E/R)
DIAGNOSIS SYSTEM (IPDM E/R)
Diagnosis DescriptionINFOID:0000000005369886
AUTO ACTIVE TEST
Description
In auto active test mode, the IPDM E/R sends a drive signal to the follo wing systems to check their operation.
• Oil pressure low/coolant pressure high warning indicator
• Oil pressure gauge
• Rear window defogger
• Front wipers
• Tail, license and parking lamps
• Front fog lamps
• Headlamps (Hi, Lo)
• A/C compressor (magnetic clutch)
• Cooling fan
Operation Procedure
1. Close the hood and front door RH, and lift the wiper a rms from the windshield (to prevent windshield dam-
age due to wiper operation).
NOTE:
When auto active test is performed with hood opened, sprinkle water on windshield before hand.
2. Turn ignition switch OFF.
3. Turn the ignition switch ON and, within 20 seconds, press the front door switch LH 10 times. Then turn the ignition switch OFF.
4. Turn the ignition switch ON within 10 seconds. Af ter that the horn sounds once and the auto active test
starts.
5. After a series of the following operations is repeated 3 times, auto active test is completed.
NOTE:
When auto active test mode has to be cancelled halfway through test, turn ignition switch OFF.
CAUTION:
• If auto active test mode cannot be actuated, check door switch system. Refer to DLK-71, "
Descrip-
tion".
• Do not start the engine.
Inspection in Auto Active Test Mode
When auto active test mode is actuated, the following 7 steps are repeated 3 times.
Operation
sequence Inspection Location
Operation
1 Rear window defogger 10 seconds
2 Front wipers LO for 5 seconds → HI for 5 seconds
WKIA4655E
Revision: April 20092010 QX56

DIAGNOSIS SYSTEM (IPDM E/R)EXL-25
< FUNCTION DIAGNOSIS >
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ACTIVE TEST
Te s t i t e m
TAIL&CLR REQ
[OFF/ON] ×Displays the status of the position light request signal received from BCM via CAN
communication.
HL LO REQ
[OFF/ON] ×
Displays the status of the low beam request signal received from BCM via CAN
communication.
HL HI REQ
[OFF/ON] ×Displays the status of the high beam request signal received from BCM via CAN
communication.
FR FOG REQ
[OFF/ON] ×Displays the status of the front fog lamp request signal received from BCM via
CAN communication.
FR WIP REQ
[STOP/1LOW/LOW/HI] ×
Displays the status of the front wiper request signal received from BCM via CAN
communication.
WIP AUTO STOP
[STOP P/ACT P] ×
Displays the status of the front wiper auto stop signal judged by IPDM E/R.
WIP PROT
[OFF/Block] ×
Displays the status of the front wiper fail-safe operation judged by IPDM E/R.
ST RLY REQ
[OFF/ON] Displays the status of the starter request signal received from ECM via CAN com-
munication.
IGN RLY
[OFF/ON] ×
Displays the status of the ignition relay judged by IPDM E/R.
RR DEF REQ
[OFF/ON] ×Displays the status of the rear defogger request signal received from AV control
unit via CAN communication.
OIL P SW
[OPEN/CLOSE] Displays the status of the oil pressure switch judged by IPDM E/R.
DTRL REQ
[OFF] Displays the status of the daytime light request signal received from BCM via CAN
communication.
HOOD SW
[OPEN/CLOSE] Displays the status of the hood switch judged by IPDM E/R.
THFT HRN REQ
[OFF/ON] Displays the status of the theft warning horn request signal received from BCM
via CAN communication.
HORN CHIRP
[OFF/ON] Displays the status of the horn reminder signal received from BCM via CAN com-
munication.
Monitor Item
[Unit] MAIN SIG-
NALS Description
Test item
Operation Description
REAR DEFOGGER OFF
OFF
ON Operates rear window defogger relay.
FRONT WIPER OFF
OFF
LO Operates the front wiper relay.
HI Operates the front wiper relay and front wiper high relay.
MOTOR FAN 1O
FF
2O FF
3 Operates the cooling fan relay.
4 Operates the cooling fan relay.
Revision: April 20092010 QX56

POWER SUPPLY AND GROUND CIRCUITEXL-27
< COMPONENT DIAGNOSIS >
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COMPONENT DIAGNOSIS
POWER SUPPLY AND GROUND CIRCUIT
BCM (BODY CONTROL MODULE)
BCM (BODY CONTROL MODULE) : Diagnosis ProcedureINFOID:0000000005369888
Regarding Wiring Diagram information, refer to BCS-49, "Wiring Diagram".
1. CHECK FUSES AND FUSIBLE LINK
Check that the following fuses and fusible link are not blown.
Is the fuse blown?
YES >> Replace the blown fuse or fusible link after repairing the affected circuit.
NO >> GO TO 2
2. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM.
3. Check voltage between BCM harness connector and ground.
Is the measurement value normal?
YES >> GO TO 3
NO >> Repair or replace harness.
3. CHECK GROUND CIRCUIT
Terminal No. Signal nameFuses and fusible link No.
57 Battery power supply 22 (15A)
70 F (50A)
11 Ignition ACC or ON 4 (10A)
38 Ignition ON or START 59 (10A)
ConnectorTe r m i n a l s
Power
source Condition Voltage (V) (Ap-
prox.)
(+) (-)
M18 11 Ground
ACC
power
supply Ignition
switch
ACC or ON Battery voltage
38 Ground Ignition
power
supply Ignition
switch ON
or START Battery voltage
M20 57 Ground
Battery
power
supply Ignition
switch OFF Battery voltage
70 Ground Battery
power
supply Ignition
switch OFF Battery voltage
LIIA2415E
Revision: April 20092010 QX56

EXL-28
< COMPONENT DIAGNOSIS >
POWER SUPPLY AND GROUND CIRCUIT
Check continuity between BCM harness connector and ground.
Does continuity exist?
YES >> Inspection End.
NO >> Repair or replace harness.
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
IPDM E/R (INTELLIGENT POWER DIST RIBUTION MODULE ENGINE ROOM) : Di-
agnosis Procedure
INFOID:0000000005369889
Regarding Wiring Diagram information, refer to PCS-27, "Wiring Diagram".
1. CHECK FUSES AND FUSIBLE LINK
Check that the following IPDM E/R fuses or fusible link are not blown.
Is the fuse blown?
YES >> Replace the blown fuse or fusible link after repairing the affected circuit.
NO >> GO TO 2
2. CHECK BATTERY POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R.
3. Check voltage between IPDM E/R harness connectors and ground.
Is the measurement value normal?
YES >> GO TO 3
NO >> Repair or replace harness.
3. CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
BCM
GroundContinuity
Connector Terminal
M20 67 Yes
LIIA0915E
Terminal No. Signal nameFuses and fusible link No.
1 Battery A, D
2 Battery C
12 Ignition switch ON or START 59
TerminalsIgnition switch position
(+) (−) OFF ON START
Connector Terminal
E118 (A) 1
Ground Battery
voltage Battery
voltage Battery
voltage
2 Battery
voltage Battery
voltage Battery
voltage
E119 (B) 12 0VBattery
voltage Battery
voltage
AWMIA0023ZZ
Revision: April 20092010 QX56

EXL-30
< COMPONENT DIAGNOSIS >
HEADLAMP (HI) CIRCUIT
HEADLAMP (HI) CIRCUIT
DescriptionINFOID:0000000005370270
The IPDM E/R (intelligent power distribution module engine room) controls the headlamp LH high and head-
lamp RH high relays based on inputs from the BCM via the CAN communication lines. When the headlamp LH
high and headlamp RH high relays are energized, power flows through fuse\
s 34 and 35, located in the IPDM
E/R. Power then flows to the front combination lamps to the headlamp high beam.
Component Function CheckINFOID:0000000005146640
1.CHECK HEADLAMP (HI) OPERATION
WITHOUT CONSULT-III
1. Start IPDM E/R auto active test. Refer to PCS-12, "
Diagnosis Description".
2. Check that the headlamp switches to the high beam. NOTE:
HI/LO is repeated 1 second each when usi ng the IPDM E/R auto active test.
CONSULT-III
1. Select "EXTERNAL LAMPS" of IPDM E/R active test item.
2. With the test item operating, check that the headlamp switches to high beam.
Does the headlamp switch to high beam?
YES >> Headlamp (HI) circuit is normal.
NO >> Refer to EXL-30, "
Diagnosis Procedure - Without Daytime Light System", EXL-31, "Diagnosis
Procedure - With Daytime Light System".
Diagnosis Procedure - Wit hout Daytime Light SystemINFOID:0000000005146641
Regarding Wiring Diagram information, refer to EXL-52, "Wiring Diagram".
1.CHECK HEADLAMP (HI) FUSES
1. Turn the ignition switch OFF.
2. Check that the following fuses are not open.
Is the fuse open?
YES >> Repair the harness and replace the fuse.
NO >> GO TO 2.
2.CHECK HEADLAMP (HI) OUTPUT VOLTAGE Hi : Headlamp switches to the high beam.
Off : Headlamp OFF
Unit
LocationFuse No.Capacity
Headlamp HI (LH) IPDM E/R3510A
Headlamp HI (RH) IPDM E/R3410A
Revision: April 20092010 QX56

HEADLAMP (HI) CIRCUITEXL-31
< COMPONENT DIAGNOSIS >
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1. Turn the ignition switch OFF.
2. Disconnect the front combination lamp connector E11 or E107.
3. Turn the ignition switch ON.
4. Turn the high beam headlamps ON.
5. With the high beam headlamps ON, check the voltage between the combination lamp connector and ground.
Are the voltage readings as specified?
YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK HEADLAMP (HI) CIRCUIT FOR OPEN
1. Turn the ignition switch OFF.
2. Disconnect IPDM E/R connector E123.
3. Check continuity between the IPDM E/R harness connector (A) and the front combination lamp harness connector (B).
Does continuity exist?
YES >> GO TO 4.
NO >> Repair the harnesses or connectors.
4.CHECK FRONT COMBINATION LAMP (HI) GROUND CIRCUIT
Check continuity between the front combination lamp harness con-
nector terminal and ground.
Does continuity exist?
YES >> Inspect the headlamp bulb.
NO >> Repair the harness.
Diagnosis Procedure - With Daytime Light SystemINFOID:0000000005146642
Regarding Wiring Diagram information, refer to EXL-56, "Wiring Diagram".
1.CHECK HEADLAMP (HI) FUSES
1. Turn the ignition switch OFF.
2. Check that the following fuses are not open.
(+) (−)Voltage
Connector Terminal
LH E11 6 Ground Battery voltage
RH E107 6
ALLIA0852ZZ
AB Continuity
Connector Terminal Connector Terminal
LH E123 55
E11 6
Ye s
RH 56E107 6
AWLIA1371ZZ
Connector Terminal —Continuity
LH E11 2
Ground Yes
RH E107 2
ALLIA0854ZZ
Revision: April 20092010 QX56

EXL-32
< COMPONENT DIAGNOSIS >
HEADLAMP (HI) CIRCUIT
Is the fuse open?
YES >> Repair the harness and replace the fuse.
NO >> GO TO 2.
2.CHECK HEADLAMP (HI) OUTPUT VOLTAGE
1. Turn the ignition switch OFF.
2. Disconnect the front combination lamp connector E6 or E108.
3. Turn the ignition switch ON.
4. Turn the high beam headlamps ON.
5. With the high beam headlamps ON, check the voltage between the combination lamp connector and ground.
Are the voltage readings as specified?
YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK HEADLAMP (HI) CIRCUIT FOR OPEN
1. Turn the ignition switch OFF.
2. Disconnect IPDM E/R connector E123.
3. Check continuity between the IPDM E/R harness connector (A) and the front combination lamp harness connector (B).
Does continuity exist?
YES >> GO TO 4.
NO >> Repair the harnesses or connectors.
4.CHECK FRONT COMBINATION LAMP (HI) GROUND CIRCUIT
Check continuity between the front combination lamp harness con-
nector terminal and ground.
Does continuity exist?
YES >> Inspect the headlamp bulb.
NO - RH>>Repair the harness.
NO - LH >>Inspect daytime light rela y. If OK, repair harness. If NG,
replace the daytime light relay.
Unit LocationFuse No.Capacity
Headlamp HI (LH) IPDM E/R3510A
Headlamp HI (RH) IPDM E/R3410A
(+)
(−)Voltage
Connector Terminal
LH E6 6 GroundBattery voltage
RH E108 6
ALLIA0852ZZ
AB
Continuity
Connector Terminal Connector Terminal
LH E123 55
E66
Ye s
RH 56E108 6
AWLIA1371ZZ
Connector Terminal —Continuity
LH E6 2
Ground Yes
RH E108 2
ALLIA0854ZZ
Revision: April 20092010 QX56