turn signal INFINITI QX56 2004 Factory Service Manual

AUTOMATIC BACK DOOR SYSTEM
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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

AUTOMATIC BACK DOOR SYSTEM
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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

BL-116
AUTOMATIC BACK DOOR SYSTEM
Revision: August 20072004 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 ChartEIS002T1
Back door warning chime order Back door warning chime length
Start self-diagnosis1.5 seconds
OK NG
1. Operating conditions diagnosis 0.5 seconds 0.2 seconds
2. Back door encoder diagnosis 0.5 seconds 0.2 seconds
3. Back door clutch diagnosis 0.5 seconds 0.2 seconds
4. Back door motor diagnosis 0.5 seconds 0.2 seconds
5. Cinch latch motor diagnosis 0.5 seconds 0.2 seconds
Restart self-diagnosis 1.5 seconds
Item NG Result Refer to
1. Operating conditions diagnosis resultOne 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 resultSensor diagnosis/short, pulse signal, pulse
signal directionBL-117
3. Back door clutch diagnosis result Back door clutch does not operateBL-124
4. Back door motor diagnosis resultBack door motor does not operate (no operat-
ing current)BL-117
5. Cinch latch motor diagnosis resultCinch latch motor does not operate (no oper-
ating current)BL-128
Symptom Suspect systems Refer to
Automatic operations are not executed from the back door fully
closed or fully open position.
(Auto closure operates normally.)Power liftgate switch system inspectionBL-118
Park switch —
Power window serial linkBL-114
Pinch strip system inspectionBL-122
Automatic operations are not carried out together with open/close
operations.
(Manual operations are normal.)Power liftgate switch system inspectionBL-118Back door close switch system inspectionBL-120
Auto back door power supply and ground cir-
cuit system inspection.BL-117
The auto closure function does not operate.
(Stops at the halfway position for auto closing operations.)Pinch strip system inspectionBL-122

AUTOMATIC BACK DOOR SYSTEM
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Revision: August 20072004 QX56
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. 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.TRNK OPN MNTR : ON
TRNK OPN MNTR : OFF
WIIA0108E
Connec-
torItemTerminals (Wire color)
ConditionVoltage (V)
(Approx.)
( + ) ( – )
M19 BCM 42 (GR) GroundOpen
↓
Closed0
↓
5
LIIA1149E
+ (GR) - 42 (GR) : Continuity should exist
+ (GR) - 17 (GR) : Continuity should exist
+ (GR) - Ground : Continuity should not exist
LIIA1547E

BL-120
AUTOMATIC BACK DOOR SYSTEM
Revision: August 20072004 QX56
3. CHECK GLASS HATCH AJAR SWITCH
Check continuity between glass hatch ajar switch connector terminal
and ground.
OK or NG
OK >> Check glass hatch ajar switch case ground.
NG >> Replace glass hatch ajar switch.
Back Door Close (Close) Switch System InspectionEIS002T4
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.
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 >> 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 control unit connector (A)
B55 terminal 8 and back door close switch connector (B) B63
terminal 1.
3. Check continuity between back door close switch connector (B)
B63 terminal 1 and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness.
Terminal Condition Continuity
Glass hatch ajar
switch + – GroundOpen Yes
Closed No
LIIA1151E
Connector terminal
(Wire color)Position of back door close
switchVoltage (V)
(Approx.)
( + ) ( - )
8 (GR/B) GroundMomentary
close positionON 0
OFF 5
LIIA0805E
1 (GR/B) - 8 (GR/B) : Continuity should exist.
1 (GR/B) - Ground : Continuity should not exist.
LIIA2255E

AUTOMATIC BACK DOOR SYSTEM
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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 InspectionEIS002T5
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.
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 >> 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 control unit connector (A)
B55 terminal 13 and back door close switch connector (B) B63
terminal 5.
3. Check continuity between back door close switch connector (B)
B63 terminal 5 and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness.3 (B) - Ground : Continuity should exist.
WIIA0602E
Connector terminal
(Wire color)Position of back door close
switchVoltage (V)
(Approx.)
( + ) ( - )
13 (P/L) Ground Cancel positionON 0
OFF 5
LIIA1068E
5 (P/L) - 13 (P/L) : Continuity should exist.
5 (P/L) - ground : Continuity should not exist.
LIIA2256E

BL-122
AUTOMATIC BACK DOOR SYSTEM
Revision: August 20072004 QX56
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.
Pinch Strip System InspectionEIS002T6
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 >> 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 back door control unit connector (A)
B55 terminal 5, 19 (RH), 20 (LH) and pinch strip connector (B)
D715 (RH), D517 (LH) terminals 1, 2.
3. Check continuity between pinch strip connector (B) D715 (RH),
D517 (LH) terminal 1 and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair the harness between the pinch strip and the back door control unit.3 (B) - Ground : Continuity should exist.
WIIA0602E
Connector terminal
(Wire color)
ConditionVoltage (V)
(Approx.)
( + ) ( - )
19 (BR/B)
20 (V/G)GroundPinch strip operation 0
Other 5
LIIA0811E
1 (BR/B) - 19 (BR/B) : Continuity should exist.
1 (V/G) - 20 (V/G) : Continuity should exist.
2 (B/P) - 5 (B/P) : Continuity should exist.
1 (BR/B) - ground : Continuity should not exist.
1 (V/G) - ground) : Continuity should not exist.
LIIA2257E

BL-124
AUTOMATIC BACK DOOR SYSTEM
Revision: August 20072004 QX56
Half-Latch Switch System InspectionEIS002T8
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.
2. HALF-LATCH SWITCH CIRCUIT INSPECTION
1. Disconnect back door latch and back door control unit connector.
2. Check continuity between back door control unit connector (A)
B55 terminal 22 and back door latch (half-latch switch) connec-
tor (B) D503 terminal 6.
3. Check continuity between back door latch (half-latch switch)
connector (B) D503 terminal 6 and ground.
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.
22 (BR) - Ground
LIIA0826EPIIA2169E
6 (BR) - 22 (BR) : Continuity should exist.
6 (BR) - 22 (BR) : Continuity should not exist.
LIIA2259E
8 (B) - Ground : Continuity should exist.
LIIA0828E

AUTOMATIC BACK DOOR SYSTEM
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Revision: August 20072004 QX56
Open Switch System InspectionEIS002T9
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.
2. OPEN SWITCH CIRCUIT INSPECTION
1. Disconnect back door latch and back door control unit connector.
2. Check continuity between back door control unit connector (A)
B55 terminal 15 and back door latch (open switch) connector (B)
D503 terminal 4.
3. Check continuity between back door latch (open switch) connec-
tor (B) D503 terminal 4 and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. OPEN SWITCH GROUND INSPECTION
Check continuity between back door latch (open switch) connector
D503 terminal 8 and ground.
OK or NG
OK >> Replace the back door latch.
NG >> Repair or replace harness.
15 (O/L) - Ground
LIIA0829EPIIA2171E
4 (O/L) - 15 (O/L) : Continuity should exist.
4 (O/L) - ground : Continuity should not exist.
LIIA2260E
8 (B) - Ground : Continuity should exist.
LIIA0828E

BL-126
AUTOMATIC BACK DOOR SYSTEM
Revision: August 20072004 QX56
Close Switch System InspectionEIS002TA
1. CLOSE 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 14 and-
ground.
OK or NG
OK >> Close switch is OK.
NG >> GO TO 2.
2. CLOSE SWITCH CIRCUIT INSPECTION
1. Disconnect back door latch and back door control unit.
2. Check continuity between back door control unit connector (A)
B55 terminal 14 and back door latch (close switch) connector
(B) D503 terminal 5.
3. Check continuity between back door latch (close switch) con-
nector (B) D503 terminal 5 and ground.
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.
14 (P) - Ground
LIIA0831EPIIA2172E
5 (P) - 14 (P) : Continuity should exist.
5 (P) - ground : Continuity should not exist.
LIIA2261E
8 (B) - Ground : Continuity should exist.
LIIA0828E