Page 897 of 3383

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
Page 898 of 3383
AUTOMATIC BACK DOOR SYSTEMBL-117
C
DE
F
G H
J
K L
M A
B
BL
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
Page 899 of 3383

BL-118
AUTOMATIC BACK DOOR SYSTEM
Revision: November 20092006 QX56
2. CHECK GLASS HATCH AJAR SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect glass hatch ajar switch, BCM and back door control unit.
3. Check continuity between glass hatch ajar switch connector D707 terminal + and BCM connector M19 ter- minal 42.
4. Check continuity between glass hatch ajar switch connector D707 terminal + and back door control unit connector B55 termi-
nal 17.
5. Check continuity between glass hatch ajar switch connector D707 terminal + and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. CHECK GLASS HATCH AJAR SWITCH
1. Disconnect glass hatch ajar switch connector.
2. Check continuity between glass hatch ajar switch connector terminal and ground.
OK or NG
OK >> Check glass hatch ajar switch case ground condition.
NG >> Replace glass hatch ajar switch, or repair or replace harness.
Back Door Close (Close) Switch System InspectionEIS00617
1. BACK DOOR CLOSE SWITCH FUNCTION INSPECTION
Check back door close (close) switch using switch operation.
OK or NG
OK >> Back door close switch is OK.
NG >> GO TO 2. + - 42
: Continuity should exist
+ - 17 : Continuity should exist
+ - Ground : Continuity should not exist
LIIA1547E
Terminals Condition Continuity
Glass hatch ajar switch +
– Ground Open
Yes
Closed No
LIIA1151E
Page 900 of 3383

AUTOMATIC BACK DOOR SYSTEMBL-119
C
DE
F
G H
J
K L
M A
B
BL
Revision: November 2009 2006 QX56
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
Page 901 of 3383

BL-120
AUTOMATIC BACK DOOR SYSTEM
Revision: November 20092006 QX56
2. BACK DOOR CLOSE (CANCEL) SWITCH SIGNAL INSPECTION
1. Turn ignition switch OFF.
2. While operating the back door close (cancel) switch, check volt- age between back door control unit connector B55 terminal 13
and ground.
OK or NG
OK >> Back door close switch is OK.
NG >> GO TO 3.
3. BACK DOOR CLOSE (CANCEL) 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 5 and back door control unit connector B55 terminal 13.
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.
Terminals ConditionVoltage (V)
(Approx.)
(+) (-)
13 Ground Back door
close switch ON
0
OFF 5
LIIA1068E
5 - 13 : Continuity should exist.
LIIA1069E
3 - Ground: Continuity should exist.
WIIA0602E
Page 902 of 3383

AUTOMATIC BACK DOOR SYSTEMBL-121
C
DE
F
G H
J
K L
M A
B
BL
Revision: November 2009 2006 QX56
Pinch Strip System InspectionEIS00619
1. PINCH STRIP SIGNAL INSPECTION
1. Turn ignition switch OFF.
2. While operating the pinch strip, check voltage between back door control unit connector B55 terminals 19, 20 and ground.
OK or NG
OK >> Pinch strip switch is OK.
NG >> GO TO 2.
2. PINCH STRIP CIRCUIT INSPECTION
1. Disconnect pinch strip and back door control unit.
2. Check continuity between pinch strip connector D715 (RH), D517 (LH) terminal 1, 2 and back door control unit connector
B55 terminal 5, 19 (RH), 20 (LH).
OK or NG
OK >> GO TO 3.
NG >> Repair the harness between the pinch strip and the back door control unit.
3. PINCH STRIP GROUND INSPECTION
1. Connect back door control unit connector.
2. Check continuity between pinch strip connector terminal 2 and ground.
OK or NG
OK >> Replace the pinch strip.
NG >> Repair or replace harness.
Te r m i n a l s ConditionVoltage (V)
(Approx.)
(+) (-)
19
20 Ground Pinch strip operation
0
Other 4
LIIA0811E
1 - 19 : Continuity should exist.
1 - 20 : Continuity should exist.
2 - 5 : Continuity should exist.
LIIA0815E
2 - Ground: Continuity should exist.
LIIA0817E
Page 903 of 3383

BL-122
AUTOMATIC BACK DOOR SYSTEM
Revision: November 20092006 QX56
Back Door Warning Chime System InspectionEIS0061A
1. BACK DOOR WARNING CHIME CIRCUIT INSPECTION
1. Disconnect back door warning chime and back door control unit.
2. Check continuity between back door warning chime connector D514 terminal 1 and back door control unit connector B55 termi-
nal 6.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace harness.
2. WARNING CHIME CIRCUIT INSPECTION
Check continuity between back door warning chime connector D514
terminal 2 and back door control unit connector B55 terminal 9.
OK or NG
OK >> Replace warning chime.
NG >> Repair or replace harness.
Half-Latch Switch System InspectionEIS0061B
1. HALF-LATCH SWITCH 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 terminal 22 and
ground.
OK or NG
OK >> Half-latch switch is OK.
NG >> GO TO 2. 1 - 6
: Continuity should exist.
LIIA0822E
2 - 9: Continuity should exist.
LIIA2182E
22 - Ground
LIIA0826EPIIA2169E
Page 904 of 3383

AUTOMATIC BACK DOOR SYSTEMBL-123
C
DE
F
G H
J
K L
M A
B
BL
Revision: November 2009 2006 QX56
2. HALF-LATCH SWITCH CIRCUIT INSPECTION
1. Disconnect back door latch and back door control unit connector.
2. Check continuity between back door latch (half-latch switch) connector D503 terminal 6 and back door control unit connector
B55 terminal 22.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. HALF-LATCH SWITCH GROUND INSPECTION
Check continuity between back door latch (half-latch switch) connec-
tor D503 terminal 8 and ground.
OK or NG
OK >> Replace the back door latch.
NG >> Repair or replace harness.
Open Switch System InspectionEIS0061C
1. OPEN SWITCH SIGNAL INSPECTION
1. Turn ignition switch OFF.
2. While fully closing and opening the back door, check voltage between back door control unit connector B55 terminal 15 and
ground.
OK or NG
OK >> Open switch is OK.
NG >> GO TO 2. 6 - 22
: Continuity should exist.
LIIA0827E
8 - Ground: Continuity should exist.
LIIA0828E
15 - Ground
LIIA0829EWIIA1047E