2006 INFINITI QX56 battery

BL-112
AUTOMATIC BACK DOOR SYSTEM
Revision: November 20092006 QX56
Terminals and Reference Value for BCMEIS00611
21 W/V Power window serial link—
22 BR Half switch signal Back door half latch position
23 L/W Power liftgate switch ON
0
OFF 5
26 V Back door handle switch signal Handle operation
0
Other Battery voltage
Te r m i n a l
Wire
Color Item
Condition Voltage (V)
(Approx.)
PIIA2344E
PIIA2169E
Te r m i n a l Wire
Color Item
Condition Voltage (V)
(Approx.)
10 G Hazard lamp flash input Back door active
0
Other 5
22 W/V Bus —
42 GR Glass hatch ajar switch Open
0
Closed 5
43 R/B Back door latch (door ajar
switch) Open
0
Closed 5
67 B Ground —0
70 W/B Battery power supply —Battery voltage
PIIA2344E

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Revision: November 2009 2006 QX56
Back Door Power Supply and Ground Circuit InspectionEIS00615
1. BACK DOOR POWER SUPPLY CIRCUIT INSPECTION
1. Turn ignition switch OFF.
2. Disconnect back door control unit.
3. Check voltage between back door control unit connector B55 terminals 3, 10 and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace harness.
2. BACK DOOR GROUND CIRCUIT INSPECTION
Check continuity between back door control unit connector B55 ter-
minal 1, 2 and ground.
OK or NG
OK >> Circuit is OK.
NG >> Repair or replace harness.
During auto closing operations, if obstruction is detected, the
door does not operate in reverse. Back door motor assembly
—
During close or cinch operations, the door does not operate in
reverse if the back door handle is operated. Handle switch system
BL-125
When the keyfob is operated, the back door does not operate
automatically. Remote keyless entry system inspection
BL-44Power window serial linkBL-112
Pinch strip system inspectionBL-121
Auto closure does not operate. Half-latch switch system
BL-122Cinch latch motor systemBL-126
Handle switch systemBL-125
The back door does not open.
(Closure motor rotation is not reversed.) Open switch system
BL-123
Handle switch systemBL-125
Warning chime does not sound. Back door warning chime systemBL-122
Auto closure operation works, but the back door is not fully
closed Close switch system
BL-124Handle switch systemBL-125
Cinch latch motor systemBL-126
Back door latch assembly mechanism dam-
aged or worn. —
Symptom
Suspect systemsRefer to
3 - Ground: Approx. battery voltage
10 - Ground : Approx. battery voltage
WIIA0567E
1 - Ground: Continuity should exist.
2 - Ground : Continuity should exist.
LIIA0801E

BL-116
AUTOMATIC BACK DOOR SYSTEM
Revision: November 20092006 QX56
Power Liftgate Switch System InspectionEIS00616
1. POWER LIFTGATE SWITCH FUNCTION INSPECTION
Check power liftgate switch using switch operation.
OK or NG
OK >> Power liftgate switch is OK.
NG >> GO TO 2.
2. POWER LIFTGATE SWITCH POWER SUPPLY CIRCUIT INSPECTION
1. Turn ignition switch OFF.
2. Check voltage between power liftgate switch connector M92 ter- minal 1 and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. POWER LIFTGATE SWITCH SIGNAL INSPECTION
1. Turn ignition switch OFF.
2. While operating the power liftgate switch, check voltage between back door control unit connector B55 terminal 23 and
ground.
OK or NG
OK >> Switch is OK.
NG >> GO TO 4.
4. POWER LIFTGATE SWITCH CIRCUIT INSPECTION
1. Disconnect power liftgate switch and back door control unit connector.
2. Check continuity between power liftgate switch connector M92 terminal 1 and back door control unit connector B55 terminal 23.
OK or NG
OK >> GO TO 5.
NG >> Repair or replace harness. 1 - Ground
:Approx. battery voltage
LIIA1551E
Terminals
ConditionVoltage (V)
(Approx.)
(+) (-)
23 GroundPower liftgate
switch ON
0
OFF 5
LIIA0802E
1 - 23 : Continuity should exist.
LIIA1064E

AUTOMATIC BACK DOOR SYSTEMBL-117
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Revision: November 2009 2006 QX56
5. POWER LIFTGATE SWITCH GROUND INSPECTION
Check continuity between power liftgate switch connector terminal 2
and ground.
OK or NG
OK >> Replace the power liftgate switch.
NG >> Repair or replace harness.
GLASS HATCH AJAR SWITCH CHECK
1. CHECK GLASS HATCH AJAR SWITCH INPUT SIGNAL
With CONSULT-II
Check glass hatch ajar switch ("TRNK OPN MNTR") in DATA MONITOR mode with CONSULT –II. Refer to
BL-27, "
DATA MONITOR" .

When glass hatch is open:

When glass hatch is closed:
Without CONSULT-II
Check voltage between BCM connector M19 terminal 42 and ground.
OK or NG
OK >> System is OK.
NG >> GO TO 2. 2 - Ground
: Continuity should exist.
LIIA1065E
TRNK OPN MNTR : ON
TRNK OPN MNTR : OFF
WIIA0108E
Connector Item Terminals
ConditionVoltage (V)
(Approx.)
(+) (– )
M19 BCM 42 Ground Open
↓
Closed 0
↓
Battery voltage
LIIA1149E

AUTOMATIC BACK DOOR SYSTEMBL-119
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2. BACK DOOR CLOSE SWITCH SIGNAL INSPECTION
1. Turn ignition switch OFF.
2. While operating the back door close switch, check voltage between back door control unit connector B55 terminal 8 and
ground.
OK or NG
OK >> Back door close switch is OK.
NG >> GO TO 3.
3. BACK DOOR CLOSE SWITCH CIRCUIT INSPECTION
1. Disconnect back door close switch and back door control unit connector.
2. Check continuity between back door close switch connector B63 terminal 1 and back door control unit connector B55 terminal 8.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness.
4. BACK DOOR CLOSE SWITCH GROUND INSPECTION
Check continuity between back door close switch connector B63 ter-
minal 3 and ground.
OK or NG
OK >> Replace the back door close switch.
NG >> Repair or replace harness.
Back Door Close (Cancel) Switch System InspectionEIS00618
1. BACK DOOR CLOSE SWITCH FUNCTION INSPECTION
Check back door close (cancel) switch using switch operation.
OK or NG
OK >> Back door close switch is OK.
NG >> GO TO 2.
Te r m i n a l s ConditionVoltage (V)
(Approx.)
(+) (-)
8 Ground Back door
close
switch ON 0
OFF Battery voltage
LIIA0805E
1 - 8 : Continuity should exist.
LIIA1066E
3 - Ground: Continuity should exist.
WIIA0602E

AUTOMATIC BACK DOOR SYSTEMBL-125
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Revision: November 2009 2006 QX56
2. CLOSE SWITCH CIRCUIT INSPECTION
1. Disconnect back door latch and back door control unit.
2. Check continuity between back door latch (close switch) con- nector D503 terminal 5 and back door control unit connector
B55 terminal 14.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. CLOSE SWITCH GROUND INSPECTION
Check continuity between back door latch (close switch) connector
D503 terminal 8 and ground.
OK or NG
OK >> Replace the back door latch.
NG >> Repair or replace harness.
Back Door Handle Switch System InspectionEIS0061E
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 >> Back door handle switch is OK.
NG >> GO TO 2. 5 - 14
: Continuity should exist.
LIIA0832E
8 - Ground: Continuity should exist.
LIIA0828E
Te r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (-)
26 Ground Back door handle switch (ON)
0
Other (OFF) Battery voltage
LIIA0833E

BL-126
AUTOMATIC BACK DOOR SYSTEM
Revision: November 20092006 QX56
2. BACK DOOR HANDLE SWITCH CIRCUIT INSPECTION
1. Disconnect back door handle switch and back door control unit.
2. Check continuity between back door handle switch connector D706 terminal 3 and back door control unit connector B55 termi-
nal 26.
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.
Cinch Latch Motor System InspectionEIS0061F
1. CINCH LATCH MOTOR SIGNAL INSPECTION
1. Turn ignition switch OFF.
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 >> GO TO 2.
NG >> Replace the back door control unit.
2. CINCH LATCH MOTOR CIRCUIT INSPECTION
1. Disconnect back door latch and back door control unit.
2. Check continuity between back door latch (cinch latch motor) connector D503 terminals 1, 2 and back door control unit con-
nector B55 terminals 11, 12.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness. 3 - 26
: Continuity should exist.
WIIA0604E
4 - Ground: Continuity should exist.
WIIA0605E
11 - Ground: Battery voltage
12 - Ground : Battery voltage
LIIA2397E
1 - 12 : Continuity should exist.
2 - 11 : Continuity should exist.
LIIA0837E

AUTOMATIC BACK DOOR SYSTEMBL-127
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Revision: November 2009 2006 QX56
3. 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 >> Cinch latch motor is OK.
NG >> Replace the back door latch. 1 (+) - 2 (-) : It operates.
1 (-) - 2 (+) : It operates. (Reverse rotation)
LIIA1937E