INFINITI QX56 2004 Factory Service Manual

BL-106
AUTOMATIC BACK DOOR SYSTEM
Revision: August 20072004 QX56
Warning Chime Active Conditions
The warning chime uses two types of audio warnings, a friendly chime and a warning chime. The friendly
chime consists of dings lasting 0.66 seconds each immediately followed by the next ding. The warning chime
consists of beeps lasting 0.33 seconds with a pause of 0.33 seconds between each beep.
Reverse Conditions
Operation status Operation or conditions Warning chime pattern
When auto operation startsPower liftgate switch operation
Friendly chime
2 seconds, 3 dings Remote keyless entry operation
Back door handle switch operation
Back door close switch operation
When reverse operation startsWhen reverse request is detected from
power liftgate switch, remote keyless
entry or back door close switchFriendly chime
1.3 seconds, 2 dings
When obstacle is detectedWarning chime
2 seconds, 3 beeps
Operating at low voltage While opening or closing Warning chime
2 seconds, 3 beeps
A/T selector lever not in P positionBack door close operationFriendly chime
Continuously dings
Back door open operationWarning chime
Continuously beeps
(until close operation is started)
Type Overload reverse
Operation covered Both directions
Detection methodOperation speed and motor current change direction
Pinch strips during back door close operation
Non-reversed area

For about 0.5 seconds immediately after drive motor operation
starts

Between full open and approx. 7° from full open

Closure operation area (half switch - close switch)
Number of times reverse allowedOne reversal is allowed (if a second obstacle is detected during a
power open or close operation, the door reverts to manual
mode).

AUTOMATIC BACK DOOR SYSTEM
BL-107
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Revision: August 20072004 QX56
SchematicEIS002SW
LIWA0454E

BL-108
AUTOMATIC BACK DOOR SYSTEM
Revision: August 20072004 QX56
Wiring Diagram — B/CLOS —EIS002SX
WIWA0863E

AUTOMATIC BACK DOOR SYSTEM
BL-109
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Revision: August 20072004 QX56
WIWA0174E

BL-110
AUTOMATIC BACK DOOR SYSTEM
Revision: August 20072004 QX56
WIWA0175E

AUTOMATIC BACK DOOR SYSTEM
BL-111
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Revision: August 20072004 QX56
WIWA1077E

BL-112
AUTOMATIC BACK DOOR SYSTEM
Revision: August 20072004 QX56
WIWA1078E

AUTOMATIC BACK DOOR SYSTEM
BL-113
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Revision: August 20072004 QX56
Terminals and Reference Value for Back Door Control UnitEIS002SY
Te r m i n a l Wire
ColorItem ConditionVoltage (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 active Battery voltage
7 G/R Ignition switchIgnition switch ON Battery voltage
Ignition switch OFF 0
8 GR/B Back door close switchBack door close switch ON 0
Back door close switch OFF 5
9 L Warning chime ground — —
10 W/L Battery power supply — Battery voltage
11 YCinch latch motor
CLOSE outputBack door close operation Battery voltage
12 LClosure motor
RETURN outputBack door release operation Battery voltage
13 P/L Back door cancel switchBack door cancel switch ON 0
Back door cancel switch OFF 5
14 P Close switch signal Back door close status 5
15 O/L Open switch signal Back door open status 5
17 GR Glass hatch ajar signalGlass hatch OPEN 0
Glass hatch CLOSED 5
18 GR/R Park switchP or N position (Ignition is ON) 0
Other (Ignition is ON) 5
19 BR/B Pinch strip RHDetecting obstruction 0
Other 5
20 V/G Pinch strip LHDetecting obstruction 0
Other 5
21 W/V Power window serial link —
22 BR Half switch signal Back door half latch position 0
23 L/W Power liftgate switchON 0
OFF 5
PIIA3278E
PIIA2344E

BL-114
AUTOMATIC BACK DOOR SYSTEM
Revision: August 20072004 QX56
Terminals and Reference Value for BCMEIS002SZ
26 V Back door handle switch signalHandle operation 0
Other 5 Terminal Wire
ColorItem ConditionVoltage (V)
(Approx.)
Terminal Wire
ColorItem ConditionVoltage (V)
(Approx.)
10 G Hazard lamp flash inputBack door active 0
Other 5
22 W/V Power window serial link —
42 GR Glass hatch ajar switchOpen 0
Closed 5
43 R/BBack door latch (door ajar
switch)Open 0
Closed 5
67 B Ground — 0
70 W/B Battery power supply — Battery voltage
PIIA2344E

AUTOMATIC BACK DOOR SYSTEM
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Revision: August 20072004 QX56
Trouble Diagnosis ProcedureEIS002T0
1. Check the 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-115, "
Self-Diagnosis Procedures" .
5. Refer to diagnosis chart by symptom, repair or replace any malfunctioning parts. Refer to BL-116, "
Diag-
nosis Chart" .
6. Inspection End.
Self-Diagnosis ProceduresEIS005X4
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 Operation Refer to
Power liftgate switch OFF → ONBL-118
Back door close switch (CLOSE) OFF → ONBL-120
Back door close switch (CANCEL) OFF → ONBL-121
Back door handle switch OFF → ONBL-127
Glass switch OFF → ONBL-36
A/T device (park switch) P position → other than P positionAT- 1 9 1
Vehicle speed* Vehicle speedAT-6 8
Remote keyless entry signal Keyfob switch OFF → ONBL-66
Door lock/unlock signal LOCK → UNLOCKBL-34
Pinch strip LH signal OFF → ONBL-122
Pinch strip RH signal OFF → ONBL-122