2008 INFINITI QX56 warning

AUTOMATIC BACK DOOR SELF-DIAGNOSIS PROCEDUREDLK-119
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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AUTOMATIC BACK DOOR SELF-DIAGNOSIS PROCEDURE
Self-Diagnosis ProcedureINFOID:0000000001539033
INPUT SIGNAL CHECK MODE
Input signal check mode allows testing of swit ch input signal to the back door control unit.
To activate input signal check mode on the automatic sliding door, perform the following steps:
1. Turn ignition switch OFF.
2. Turn back door close switch to CANCEL (system cancelled).
3. Place A/T shift selector lever in P position.
4. Using the inside emergency release lever, open the back door.
5. Have an assistant press and hold the back door handle switch.
6. While the assistant continues to hold the back door handle switch, turn ignition switch ON (DO NOT start
engine).
7. After approximately 5 seconds, the back door warning chime will sound for 0.5 seconds.
8. Release the back door handle switch.
9. Within 8 seconds of the back door warning chime sounding, press and hold the power liftgate switch.
10. After approximately 5 seconds, the back door warning chime will sound for 1 second.
11. Release the power liftgate switch.
12. The input signal check mode is now initialized.
The input signal check mode can test the following inputs. The back door warning chime will sound for approx-
imately 0.5 second each time a switch signal input oc curs. Use this test when one of these inputs is not
responding during normal automatic back door operation.
*Back door warning chime should sound as soon as vehicle moves.
Turn ignition switch OFF to end input signal check mode.
OPERATING CHECK MODE
Operating check mode allows self-diagnos is of the automatic back door system.
To activate operating check mode on the automatic back door, perform the following steps:
1. Turn ignition switch OFF.
2. Turn back door close switch to CANCEL (system cancelled).
3. Place A/T shift selector lever in P position.
4. Using the inside emergency release lever, open the back door.
5. Have an assistant press and hold the back door handle switch.
6. While the assistant continues to hold the back door handle switch, turn ignition switch ON (DO NOT start engine).
7. After approximately 5 seconds, the back door warning chime will sound for 0.5 second.
8. Release the back door handle switch.
Switch signal OperationRefer to
Power liftgate switch OFF → ONDLK-125
Back door close switch (CLOSE) OFF → ON DLK-127
Back door close switch (CANCEL) OFF → ON DLK-128
Back door handle switch OFF → ON DLK-134
A/T shift selector (park position switch) P position → other than P position DLK-97
Vehicle speed* Vehicle speedTM-48
Remote keyless entry signal Keyfob switch OFF → ON DLK-99
Door lock/unlock signal LOCK → UNLOCK DLK-70
Pinch strip LH signal OFF → ON DLK-129
Pinch strip RH signal OFF → ON DLK-129
Revision: March 2010 2008 QX56

DLK-120
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
AUTOMATIC BACK DOOR SELF-DIAGNOSIS PROCEDURE
9. Within 8 seconds of the back door warning chime
sounding, press the power liftgate switch 5 times in
rapid succession.
10. After approximately 5 seconds, the back door warning chime will sound for 1 second.
11. Release the power liftgate switch.
12. Immediately close the back door manually.
13. Press and release the power liftgate swit ch to activate the operating check mode.
Self-diagnosis results are indicated by the back door warning chime.
Turn ignition switch OFF to end input signal check mode.
Back door warning chime order Back door warning chime length
Start self-diagnosis 1.5 seconds
OK NG
1. Operating conditions diagnosis 0.5 second0.2 second
2. Back door encoder diagnosis 0.5 second0.2 second
3. Back door clutch diagnosis 0.5 second0.2 second
4. Back door motor diagnosis 0.5 second0.2 second
5. Cinch latch motor diagnosis 0.5 second0.2 second
Restart self-diagnosis 1.5 seconds
ItemNG ResultRefer to
1. Operating conditions diagnosis result One of the following operating conditions no
longer met: ignition switch ON, back door close
switch (CANCEL) ON, A/T shift selector lever
in P position—
2. Back door encoder diagnosis result Sensor diagnosis/short, pulse signal, pulse
signal directionDLK-236
3. Back door clutch diagnosis result
Back door clutch does not operateDLK-236
4. Back door motor diagnosis result Back door motor does not operate (no operat-
ing current)
DLK-236
5. Cinch latch motor diagnosis result Cinch latch motor does not operate (no operat-
ing current)DLK-236
Revision: March 2010
2008 QX56

DLK-130
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
BACK DOOR WARNING CHIME SYSTEM
BACK DOOR WARN
ING CHIME SYSTEM
Diagnosis ProcedureINFOID:0000000001539039
1.BACK DOOR WARNING CHI ME CIRCUIT INSPECTION
1. Disconnect back door control unit and back door warning chime.
2. Check continuity between back door control unit connector (A) B55 terminal 6 and back door warning chime connector (B)
D514 terminal 1.
3. Check continuity between back door control unit connector (A) B55 terminal 6 and ground.
Is the inspection result normal?
YES >> GO TO 2
NO >> Repair or replace the harness between t he warning chime and the back door control unit.
2.WARNING CHIME CIRCUIT INSPECTION
1. Check continuity between back door control unit connector (A) B55 terminal 9 and back door warning chime connector (B)
D514 terminal 2.
2. Check continuity between back door control unit connector (A) B55 terminal 9 and ground.
Is the inspection result normal?
YES >> Replace warning chime.
NO >> Repair or replace the harness between t he warning chime and the back door control unit.
6 - 1 : Continuity should exist.
6 - Ground : Continuity should not exist.
ALKIA0673ZZ
9 - 2
: Continuity should exist.
9 - Ground : Continuity should not exist.
ALKIA0674ZZ
Revision: March 2010 2008 QX56

BCM (BODY CONTROL MODULE)DLK-145
< ECU DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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Te r m i n a l Wire
color Signal name Signal
input/
output Measuring condition
Reference value or waveform
(Approx.)
Ignition
switch Operation or condition
1BR/W Ignition keyhole illumi-
nation Output OFFDoor is locked (SW OFF)
Battery voltage
Door is unlocked (SW ON) 0V
2SB Combination switch
input 5 Input ON
Lighting, turn, wiper OFF
Wiper dial position 4
3G/Y Combination switch
input 4 Input ONLighting, turn, wiper OFF
Wiper dial position 4
4Y Combination switch
input 3 Input ON
Lighting, turn, wiper OFF
Wiper dial position 4
5G/B Combination switch
input 2
Input ONLighting, turn, wiper OFF
Wiper dial position 4
6V Combination switch
input 1
9GR/R Rear window defogger
switch
Input ONRear window defogger switch
ON
0V
Rear window defogger switch
OFF 5V
10 G Hazard lamp flash Input OFF ON (opening or closing)
0V
OFF (other than above) Battery voltage
11 O Ignition switch (ACC
or ON)
InputACC or
ON Ignition switch ACC or ON
Battery voltage
12 R/L Front door switch RH Input OFF ON (open)
0V
OFF (closed) Battery voltage
13 GR Rear door switch RH Input OFF ON (open)
0V
OFF (closed) Battery voltage
15 L/W Tire pressure warning
check connector
Input OFF
—5V
18 P Remote keyless entry
receiver and optical
sensor (ground)
Output OFF
—0V
SKIA5291E
SKIA5292E
SKIA5291E
SKIA5292E
Revision: March 2010 2008 QX56

DLK-164
< ECU DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
BCM (BODY CONTROL MODULE)
CONSULT display
Fail-safeIntelligent Key
warning lamp ON Tire pressure
monitor warning lamp ON Reference page
No DTC is detected.
further testing
may be required. ————
U1000: CAN COMM CIRCUIT ———BCS-30
U1010: CONTROL UNIT (CAN) ———BCS-31
B2190: NATS ANTENNA AMP ———SEC-29
B2191: DIFFERENCE OF KEY ———SEC-32
B2192: ID DISCORD BCM-ECM ———SEC-33
B2193: CHAIN OF BCM-ECM ———SEC-35
B2552: INTELLIGENT KEY ———SEC-37
B2590: NATS MALFUNCTION ———SEC-38
C1704: LOW PRESSURE FL ———WT-31
C1705: LOW PRESSURE FR ———WT-31
C1706: LOW PRESSURE RR ———WT-31
C1707: LOW PRESSURE RL ———WT-31
C1708: [NO DATA] FL ———WT-14
C1709: [NO DATA] FR ———WT-14
C1710: [NO DATA] RR ———WT-14
C1711: [NO DATA] RL ———WT-14
C1712: [CHECKSUM ERR] FL ———WT-16
C1713: [CHECKSUM ERR] FR ———WT-16
C1714: [CHECKSUM ERR] RR ———WT-16
C1715: [CHECKSUM ERR] RL ———WT-16
C1716: [PRESSDATA ERR] FL ———WT-18
C1717: [PRESSDATA ERR] FR ———WT-18
C1718: [PRESSDATA ERR] RR ———WT-18
C1719: [PRESSDATA ERR] RL ———WT-18
C1720: [CODE ERR] FL ———WT-16
C1721: [CODE ERR] FR ———WT-16
C1722: [CODE ERR] RR ———WT-16
C1723: [CODE ERR] RL ———WT-16
C1724: [BATT VOLT LOW] FL ———WT-16
C1725: [BATT VOLT LOW] FR ———WT-16
C1726: [BATT VOLT LOW] RR ———WT-16
C1727: [BATT VOLT LOW] RL ———WT-16
C1729: VHCL SPEED SIG ERR ———WT-19
C1735: IGNITION SIGNAL ———WT-20
Revision: March 2010 2008 QX56

BACK DOOR CONTROL UNITDLK-187
< ECU DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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BACK DOOR CONTROL UNIT
Reference ValueINFOID:0000000001539061
TERMINAL LAYOUT
PHYSICAL VALUES
LIIA2444E
Te r m i n a l Wire Col-
or Item
Condition Voltage (V)
(Approx.)
1 B Ground ——
2 B Ground ——
3 Y/R Battery power supply —Battery voltage
4 G Hazard lamp output Request to flash hazardsPulse must be >50ms
but less than 250ms
5 B/P Pinch strip ground ——
6 R Warning chime output Back door motor activeBattery voltage
7 G/R Ignition switch Ignition switch ON
Battery voltage
Ignition switch OFF 0
8 GR/B Back door close switch Close position ON
0
Neutral position OFF Battery voltage
9 L Warning chime ground ——
10 L/B Battery power —Battery voltage
11 Y Cinch latch motor
CLOSE output Back door close operation
Battery voltage
12 L Closure motor
RETURN output Back door release operation
Battery voltage
13 P/L Back door close switch Cancel position
0
Neutral position 5
14 P Close switch signal While fully opening back door
PIIA3278E
WIIA1047E
Revision: March 2010 2008 QX56

DOOR LOCK FUNCTION SYMPTOMSDLK-203
< SYMPTOM DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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Key reminder function does not operate properly. 1.
Check “ANTI KEY LOCK IN FUNCTION” setting in “WORK
SUPPORT”.
DLK-48
2. Door switch check.
DLK-67
3a. Inside key antenna 1 (rear of center console) check.DLK-56
3b. Inside key antenna 2 (luggage compartment) check.DLK-58
3c. Inside key antenna 3 (front of center console) check.DLK-60
3d. Inside key antenna 4 (overhead console area) check.DLK-62
4. Front door lock actuator LH (door unlock sensor) check.DLK-77
5. Intelligent Key battery inspection.DLK-102
6. Replace Intelligent Key unit.SEC-116
Panic alarm function does not operate properly.1. Check “PANIC ALARM DELAY” setting in “WORK SUPPORT”.
DLK-49
2. Theft warning operation check.DLK-206
3. Intelligent Key battery inspection.DLK-102
4. Key switch check (BCM). D L K - 111
5. Ignition knob switch check.DLK-112
6. Replace Intelligent Key unit.SEC-116
Back door open function does not operate prop-
erly.1. Back door diagnosis.
DLK-1192. Intelligent Key battery inspection.DLK-102
3. Replace Intelligent Key unit.SEC-116
Power window down function does not operate.1. Check “PW DOWN SET” setti
ng in “WORK SUPPORT”. DLK-492. Intelligent Key battery inspection. DLK-102
SymptomDiagnosis/service procedureReference
page
Revision: March 2010 2008 QX56

DLK-204
< SYMPTOM DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
BACK DOOR OPENER FUNCTION
BACK DOOR OPENER FUNCTION
BACK DOOR OPENER SWITCH
BACK DOOR OPENER SWITCH : Symptom TableINFOID:0000000001539068
TRUNK OPEN FUNCTION MALFUNCTION
NOTE:
• Before performing the diagnosis in the following table, check “WORK FLOW”. Refer to
DLK-6, "
Work Flow".
• Check that vehicle is under the condition shown in “Conditions of vehicle” before starting diagnosis, and
check each symptom.
• If the following symptoms” are detected, check systems shown in the “Diagnosis/service procedure” column in this order.
Conditions of Vehicle (Operating Conditions)
• Vehicle is in park.
BACK DOOR SWITCH
Symptom Suspect systemsRefer to
Automatic operations are not executed from the back door fully
closed or fully open position.
(Auto closure operates normally). Power liftgate switch system inspection
DLK-137
Park switch —
Power window serial link —
Pinch strip system inspection DLK-129
Automatic operations are not carried out together with open/close
operations.
(Manual operations are normal). Power liftgate switch system inspection
DLK-137Back door close switch system inspectionDLK-133
Auto back door power supply and ground cir-
cuit system inspection. DLK-65
The auto closure function does not operate.
(Stops at the halfway position for auto closing operations).
Pinch strip system inspection
DLK-129
During auto closing operations, if obstruction is detected, the door
does not operate in reverse. Back door motor assembly
DLK-236
During close or cinch operations, the door does not operate in re-
verse if the back door handle is operated. Handle switch system
DLK-136
When the keyfob is operated, the back door does not operate au-
tomatically. Remote keyless entry system inspection
DLK-99Power window serial link —
Pinch strip system inspection DLK-129
Auto closure does not operate. Half-latch switch system
DLK-131Cinch latch motor systemDLK-135
Handle switch systemDLK-136
The back door does not open.
(Closure motor rotation is not reversed). Open switch system
DLK-132
Handle switch systemDLK-136
Warning chime does not sound. Back door warning chime systemDLK-130
Auto closure operation works, but the back door is not fully closed Close switch system
DLK-133
Handle switch systemDLK-136
Cinch latch motor systemDLK-135
Back door latch assembly mechanism dam-
aged or worn.DLK-236
Auto open operation releases lock, but does not fully open back
door. Glass hatch ajar switch check
DLK-125
Glass hatch lock actuator does not operate
(Right front door must be unlocked for normal operation) Glass hatch switch check
DLK-123Glass hatch lock actuator check DLK-88
Replace BCMBCS-55
Revision: March 2010 2008 QX56