2005 INFINITI QX4 warning light

WARNING CHIME
DI-47
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Revision: October 20052005 QX56
Terminals and Reference Value for Combination MeterEKS00BCT
How to Proceed With Trouble DiagnosisEKS00BCU
1. Confirm the symptom or customer complaint.
2. Understand operation description and function description. Refer to DI-42, "
System Description" .
3. Perform the preliminary check. Refer to DI-47, "
Preliminary Check" .
4. Check symptom and repair or replace the cause of malfunction.
5. Does the warning chime operate properly? If so, go to 6. If not, go to 3.
6. Inspection End.
Preliminary CheckEKS00BCV
INSPECTION FOR POWER SUPPLY AND GROUND CIRCUIT
1. CHECK FUSE AND FUSIBLE LINK
Check for blown BCM fuse or fusible link.
Refer to DI-44, "Wiring Diagram — CHIME —" .
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to PG-
4, "POWER SUPPLY ROUTING CIRCUIT" .
35 O/B Combination switch output 2
ON

Light switch and wiper switch
OFF

Wiper dial position 4 36 R/W Combination switch output 1
37 B/R Key switch signal OFFKey is removed 0
Key is inserted Battery voltage
38 W/L Ignition switch ON or START ON — Battery voltage
39 L CAN-H — — —
40 P CAN-L — — —
47 SB Front door switch LH signal OFFON (open) 0
OFF (closed) 5
67 B Ground OFF — 0
70 W/B Battery power supply OFF — Battery voltage Te r m i n a l
No.Wire
colorItem Condition
Reference value (V)
(Approx.) Ignition
switchMeasurement method
SKIA5292E
Te r m i n a l
No.Wire
colorItem Condition
Reference value (V)
(Approx.) Ignition
switchMeasurement method
11 L C A N - H — — —
12 P CAN-L — — —
27 O/BSeat belt buckle pre-ten-
sioner assembly (seat belt
buckle switch) LH ONUnfastened (ON) 0
Fastened (OFF) Battery voltage
Unit Power source Fuse or fusible link No.
BCMBatteryf
Ignition switch ON or START 59

DI-50
WARNING CHIME
Revision: October 20052005 QX56
4. Touch “BUZZER” or “BCM”.
5. Select “DATA MONITOR” or “SELF-DIAG RESULTS”.
DATA MONITOR
Operation Procedure
1. Touch “BUZZER” on “SELECT TEST ITEM” screen.
2. Touch “DATA MONITOR” on “SELECT DIAG MODE” screen.
3. Touch “ALL SIGNALS” or “SELECTION FROM MENU” on “DATA MONITOR” screen.
4. If “SELECTION FROM MENU” is selected, touch the item you desire to monitor. If “ALL SIGNALS” is
selected, all control items are monitored.
5. Touch “START”.
6. During monitoring, touching “RECORD” can start recording the monitored item status.
Display Item List
ACTIVE TEST
Operation Procedure
1. Touch “BUZZER” on “SELECT TEST ITEM” screen.
2. Touch “ACTIVE TEST” on “SELECT DIAG MODE” screen.
3. Touch the item to be tested, and check the operation.
4. During the operation check, touching “OFF” deactivates the operation.
SKIA5788E
BCIA0031E
ALL SIGNALS Monitors main items.
SELECTION FROM MENU Selects and monitors items.
Monitored item Description
IGN ON SW Indicates [ON/OFF] condition of ignition switch.
KEY ON SW Indicates [ON/OFF] condition of key switch.
DOOR SW-DR Indicates [ON/OFF] condition of front door switch (driver side).
LIGHT SW 1ST Indicates [ON/OFF] condition of lighting switch.
BUCKLE SW Indicates [ON/OFF] condition of seat belt buckle switch LH.

WARNING CHIME
DI-51
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Revision: October 20052005 QX56
Display Item List
SELF-DIAGNOSTIC RESULTS
Operation Procedure
1. Touch “BCM” on "SELECT TEST ITEM” screen.
2. Touch “SELF-DIAG RESULTS” on “SELECT DIAG MODE” screen.
3. Self-diagnostic results are displayed.
Display Item List
All Warning Chimes Do Not OperateEKS00BCX
1. CHECK BCM CHIME OPERATION
Select “BUZZER” on CONSULT-II, and perform “LIGHT WARN
ALM”, "IGN KEY WARN ALM", OR "SEAT BELT WARN TEST"
active test.
Does chime sound?
YES >> Replace the BCM. Refer to BCS-20, "Removal and
Installation of BCM" .
NO >> Replace the combination meter. Refer to DI-25,
"Removal and Installation of Combination Meter" .
Test item Malfunction is detected when···
LIGHT WARN ALMThis test is able to check light warning chime operation. Light warning chime sounds for 2 sec-
onds after touching “ON” on CONSULT-II screen.
IGN KEY WARN ALMThis test is able to check key warning chime operation. Key warning chime sounds for 2 seconds
after touching “ON” on CONSULT-II screen.
SEAT BELT WARN TESTThis test is able to check seat belt warning chime operation. Seat belt warning chime sounds for 2
seconds after touching “ON” on CONSULT-II screen.
Monitored Item CONSULT-II display Description
CAN communication CAN communication [U1000] Malfunction is detected in CAN communication.
CAN communication system CAN communication system 1 to 6 [U1000] Malfunction is detected in CAN system.
SKIA6331E

DI-52
WARNING CHIME
Revision: October 20052005 QX56
Key Warning Chime and Light Warning Chime Do Not Operate (Seat Belt Warn-
ing Chime Does Operate)
EKS00BCY
1. CHECK BCM INPUT SIGNAL
With CONSULT-II
1. Select "BCM" on CONSULT-II.
2. With "DATA MONITOR" of "BUZZER", confirm "DOOR SW-DR"
changes with the status of front door LH.
Without CONSULT-II
Check voltage between BCM harness connector M19 terminal 47
(SB) and ground.
OK or NG
OK >> Replace the BCM. Refer to BCS-20, "Removal and
Installation of BCM" .
NG >> GO TO 2.
2. CHECK FRONT DOOR SWITCH LH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector M19 and front door switch LH con-
nector B8.
3. Check continuity between BCM harness connector M19 terminal
47 (SB) and front door switch LH harness connector B8 terminal
2 (SB).
4. Check continuity between BCM harness connector M19 terminal
47 (SB) and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.When front door LH is
opened: DOOR SW-DR ON
When front door LH is
closed: DOOR SW-DR OFF
LKIA0335E
When front door LH is
opened: Approx. 0V
When front door LH is
closed: Approx. 5V
WKIA1515E
Continuity should exist.
Continuity should not exist.
WKIA1516E

WARNING CHIME
DI-53
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Revision: October 20052005 QX56
3. CHECK FRONT DOOR SWITCH LH
Check continuity between front door switch LH terminal 2 and
exposed metal of switch while pressing and releasing switch.
OK or NG
OK >> Replace the BCM. Refer to BCS-20, "Removal and
Installation of BCM" .
NG >> Replace the front door switch LH.
Key Warning Chime Does Not OperateEKS00BCZ
1. CHECK FUSE
Check if the key switch fuse [No. 19, located in the fuse block (J/B)] is blown. Refer to DI-44, "
Wiring Diagram
— CHIME —" .
Is the fuse blown?
YES >> Replace the fuse. Be sure to repair the cause of malfunction before installing new fuse.
NO >> GO TO 2.
2. CHECK WARNING CHIME OPERATION
With key removed from the ignition key cylinder and the front door LH open, turn the lighting switch to 1st or
2nd position.
Does warning chime sound?
YES >> GO TO 3.
NO >> Go to DI-51, "
All Warning Chimes Do Not Operate" or DI-52, "Key Warning Chime and Light
Warning Chime Do Not Operate (Seat Belt Warning Chime Does Operate)" . When front door switch
LH is released: Continuity should exist.
When front door switch
LH is pressed: Continuity should not
exist.
WKIA2023E

WARNING CHIME
DI-55
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Revision: October 20052005 QX56
5. CHECK KEY SWITCH CIRCUIT
1. Disconnect BCM.
2. Check continuity between BCM harness connector M18 terminal
37 (B/R) and key switch and key lock solenoid harness connec-
tor M27 terminal 4 (B/R).
3. Check continuity between BCM harness connector M18 terminal
37 (B/R) and ground.
OK or NG
OK >> GO TO 6.
NG >> Repair harness or connector.
6. CHECK KEY SWITCH POWER SUPPLY CIRCUIT
Check voltage between key switch and key lock solenoid harness
connector M27 terminal 3 (Y/R) and ground.
OK or NG
OK >> Replace the BCM. Refer to BCS-20, "Removal and
Installation of BCM" .
NG >> Check harness for open or short between fuse and key
switch and key lock solenoid.
Light Warning Chime Does Not OperateEKS00BD0
1. CHECK WARNING CHIME OPERATION
Check key warning chime and seat belt warning chime functions.
Do key warning chime and seat belt warning chime sound?
YES >> GO TO 2.
NO >> Go to DI-51, "
All Warning Chimes Do Not Operate" .
2. CHECK BCM INPUT SIGNAL
With CONSULT-II
1. Select "BCM".
2. With "DATA MONITOR" of "BUZZER", confirm "LIGHT SW 1ST"
status changes when the lighting switch is moved from ON (1st
position) to OFF.
Without CONSULT-II
Check combination switch. Refer to LT-98, "
Combination Switch
Reading Function" .
OK or NG
OK >> Replace the BCM. Refer to BCS-20, "Removal and Installation of BCM" .
NG >> Check lighting switch. Refer to LT- 9 8 , "
Combination Switch Reading Function" . Continuity should exist.
Continuity should not exist.
WKIA2074E
Battery voltage should exist.
WKIA2075E
Lighting switch ON (1st position) : LIGHT SW 1ST ON
Lighting switch OFF : LIGHT SW 1ST OFF
WKIA1877E

DI-56
WARNING CHIME
Revision: October 20052005 QX56
Seat Belt Warning Chime Does Not OperateEKS00BD1
1. CHECK WARNING CHIME OPERATION
1. With key removed from the ignition and the front door LH open, turn the lighting switch to 1st or 2nd posi-
tion.
2. Return lighting switch to OFF position, and insert key into ignition.
Does warning chime sound for both steps?
YES >> GO TO 2.
NO >> Go to DI-51, "
All Warning Chimes Do Not Operate" .
2. CHECK SEAT BELT WARNING LAMP OPERATION
Turn ignition switch ON. Buckle and unbuckle the driver seat belt while watching seat belt warning lamp.
OK or NG
OK >> Replace the BCM. Refer to BCS-20, "Removal and Installation of BCM" .
NG >> GO TO 3.
3. CHECK COMBINATION METER INPUT SIGNAL
1. Turn ignition switch ON.
2. Check voltage between combination meter harness connector
M24 terminal 27 (O/B) and ground.
OK or NG
OK >> Replace the combination meter. Refer to IP-13, "Combination Meter" .
NG >> GO TO 4.
4. CHECK SEAT BELT BUCKLE SWITCH
1. Turn ignition switch OFF.
2. Disconnect seat belt buckle pre-tensioner assembly (seat belt
buckle switch) LH connector.
3. Check continuity between seat belt buckle pre-tensioner assem-
bly (seat belt buckle switch) LH terminals 1 and 2.
OK or NG
OK >> GO TO 5.
NG >> Replace the seat belt buckle pre-tensioner assembly (seat belt buckle switch) LH.When seat belt is fastened : Warning lamp OFF
When seat belt is unfastened : Warning lamp ON
Terminals
ConditionVoltage (V)
(Approx.) (+)
(–)
ConnectorTe r m i n a l
(Wire
color)
M24 27 (O/B) GroundSeat belt is fastened Battery voltage
Seat belt is unfastened 0
WKIA1821E
Terminals Condition Continuity
12Seat belt is fastened No
Seat belt is unfastened Yes
WKIA3607E

EC-64Revision: October 2005
ON BOARD DIAGNOSTIC (OBD) SYSTEM
2005 QX56
–Test values
Actual work procedures are explained using a DTC as an example. Be careful so that not only the DTC, but all
of the data listed above, are cleared from the ECM memory during work procedures.
Malfunction Indicator Lamp (MIL)UBS00KZS
DESCRIPTION
The MIL is located on the instrument panel.
1. The MIL will light up when the ignition switch is turned ON with-
out the engine running. This is a bulb check.
If the MIL does not light up, refer to DI-30, "
WARNING LAMPS" ,
or see EC-667, "
MIL AND DATA LINK CONNECTOR" .
2. When the engine is started, the MIL should go off.
If the MIL remains on, the on board diagnostic system has
detected an engine system malfunction.
ON BOARD DIAGNOSTIC SYSTEM FUNCTION
The on board diagnostic system has the following three functions.
When there is an open circuit on MIL circuit, the ECM cannot warn the driver by lighting up MIL when there is
malfunction on engine control system.
Therefore, when electrical controlled throttle and part of ECM related diagnoses are continuously detected as
NG for 5 trips, ECM warns the driver that engine control system malfunctions and MIL circuit is open by means
of operating fail-safe function.
The fail-safe function also operates when above diagnoses except MIL circuit are detected and demands the
driver to repair the malfunction.
SEF 2 17 U
Diagnostic Test
ModeKEY and ENG.
Statu sFunction Explanation of Function
Mode I Ignition switch in
ON position
Engine stoppedBULB CHECK This function checks the MIL bulb for damage (blown,
open circuit, etc.).
If the MIL does not come on, check MIL circuit.
Engine running MALFUNCTION
WARNINGThis is a usual driving condition. When a malfunction is
detected twice in two consecutive driving cycles (two trip
detection logic), the MIL will light up to inform the driver
that a malfunction has been detected.
The following malfunctions will light up or blink the MIL in
the 1st trip.

Misfire (Possible three way catalyst damage)

One trip detection diagnoses
Mode II Ignition switch in
ON position
Engine stoppedSELF-DIAGNOSTIC
RESULTSThis function allows DTCs and 1st trip DTCs to be read.
Engine operating condition in fail-safe mode Engine speed will not rise more than 2,500 rpm due to the fuel cut