2006 INFINITI QX56 Factory Service Manual

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Page 889 of 3383

INFINITI QX56 2006 Factory Service Manual BL-108
AUTOMATIC BACK DOOR SYSTEM
Revision: November 20092006 QX56
WIWA2212E

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INFINITI QX56 2006 Factory Service Manual AUTOMATIC BACK DOOR SYSTEMBL-109
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Revision: November 2009 2006 QX56
WIWA2213E

Page 891 of 3383

INFINITI QX56 2006 Factory Service Manual BL-110
AUTOMATIC BACK DOOR SYSTEM
Revision: November 20092006 QX56
WIWA1317E

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INFINITI QX56 2006 Factory Service Manual AUTOMATIC BACK DOOR SYSTEMBL-111
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Revision: November 2009 2006 QX56
Terminals and Reference Value for Back Door Control UnitEIS00610
Te r m i n a l Wire
Color Item
Condition

Page 893 of 3383

INFINITI QX56 2006 Factory Service Manual 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 posit

Page 894 of 3383

INFINITI QX56 2006 Factory Service Manual AUTOMATIC BACK DOOR SYSTEMBL-113
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Revision: November 2009 2006 QX56
Trouble Diagnosis ProcedureEIS00612
1. Check the trouble symptom and customers requests.
2. Understand out

AUTOMATIC BACK DOOR SYSTEMBL-113
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Revision: November 2009 2006 QX56
Trouble Diagnosis ProcedureEIS00612
1. Check the trouble symptom and customer's requests.
2. Understand outline of system. Refer to BL-45, "
System Description" .
3. Confirm system operation.
4. Perform self-diagnosis procedures. Refer to BL-113, "
Self-Diagnosis Procedures" .
5. Refer to diagnosis chart by symptom, repair or replace any malfunctioning parts. Refer to BL-114, "
Diag-
nosis Chart" .
6. Inspection End.
Self-Diagnosis ProceduresEIS00613
INPUT SIGNAL CHECK MODE
Input signal check mode allows testing of switch input signal to the back door control unit.
To activate input signal 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 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 seconds each time a switch signal input occurs. 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-diagnosis 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 selector lever in P position.
Switch signal OperationRefer to
Power liftgate switch OFF → ON BL-116
Back door close switch (CLOSE) OFF → ON BL-118
Back door close switch (CANCEL) OFF → ON BL-119
Back door handle switch OFF → ON BL-125
Glass switch OFF → ON BL-117
A/T device (park switch) P position → other than P position AT- 6 1
Vehicle speed* Vehicle speed—
Remote keyless entry signal Keyfob switch OFF → ON BL-44
Door lock/unlock signal LOCK → UNLOCK BL-16
Pinch strip LH signal OFF → ON BL-121
Pinch strip RH signal OFF → ON BL-121

Page 895 of 3383

INFINITI QX56 2006 Factory Service Manual BL-114
AUTOMATIC BACK DOOR SYSTEM
Revision: November 20092006 QX56
4. Using the inside emergency release lever, open the back door.
5. Have an assistant press and hold the back door handle switch.
6.

BL-114
AUTOMATIC BACK DOOR SYSTEM
Revision: November 20092006 QX56
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 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 switch to activate operating check mode.
Self-diagnosis results are indicated by the back door warning chime.
Turn ignition switch OFF to end input signal check mode.
Diagnosis ChartEIS00614
Back door warning chime order Back door warning chime length
Start self-diagnosis 1.5 seconds
OK NG
1. Operating conditions diagnosis 0.5 seconds0.2 seconds
2. Back door encoder diagnosis 0.5 seconds0.2 seconds
3. Back door clutch diagnosis 0.5 seconds0.2 seconds
4. Back door motor diagnosis 0.5 seconds0.2 seconds
5. Cinch latch motor diagnosis 0.5 seconds0.2 seconds
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 selector lever
in P position—
2. Back door encoder diagnosis result Sensor diagnosis/short, pulse signal, pulse
signal directionBL-135
3. Back door clutch diagnosis result
Back door clutch does not operateBL-135
4. Back door motor diagnosis result Back door motor does not operate (no operat-
ing current)BL-135
5. Cinch latch motor diagnosis result Cinch latch motor does not operate (no oper-
ating current)
BL-135
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
BL-116
Park switch —
Power window serial link BL-112
Pinch strip system inspectionBL-121
Automatic operations are not carried out together with open/close
operations.
(Manual operations are normal.) Power liftgate switch system inspection
BL-116Back door close switch system inspectionBL-118
Auto back door power supply and ground cir-
cuit system inspection.BL-115
The auto closure function does not operate.
(Stops at the halfway position for auto closing operations.) Pinch strip system inspection
BL-121

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INFINITI QX56 2006 Factory Service Manual AUTOMATIC BACK DOOR SYSTEMBL-115
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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

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