Back up INFINITI QX56 2004 Factory Service Manual

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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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.
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

AUTOMATIC BACK DOOR SYSTEM
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3. PINCH STRIP GROUND INSPECTION
1. Connect back door control unit.
2. Check continuity between pinch strip connector terminal 2 and
ground.
OK or NG
OK >> Replace the pinch strip.
NG >> Repair or replace harness.
Back Door Warning Chime System InspectionEIS002T7
1. BACK DOOR WARNING CHIME CIRCUIT INSPECTION
1. Disconnect back door warning chime and back door control unit.
2. Check continuity between back door control unit connector (A)
B55 terminal 6 and back door warning chime connector (B)
D514 terminal 1.
3. Check continuity between back door warning chime connector
(B) D514 terminal 1 and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace harness.
2. WARNING CHIME CIRCUIT INSPECTION
1. Connect back door control unit.
2. Check continuity between warning chime connector D514 termi-
nal 2 and ground.
OK or NG
OK >> Replace warning chime.
NG >> Repair or replace harness.2 (B/P) - Ground : Continuity should exist.
LIIA0817E
1 (R) - 6 (R) : Continuity should exist.
1 (R) - ground : Continuity should not exist.
LIIA2258E
2 (L) - Ground : Continuity should exist.
WIIA0603E

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

AUTOMATIC BACK DOOR SYSTEM
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Revision: August 20072004 QX56
Back Door Handle Switch System InspectionEIS002TB
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 >> Switch is OK.
NG >> GO TO 2.
2. BACK DOOR HANDLE SWITCH CIRCUIT INSPECTION
1. Disconnect back door handle switch and back door control unit.
2. Check continuity between back door control unit connector (A)
B55 terminal 26 and back door handle switch connector (B)
D706 terminal 3.
3. Check continuity between back door handle switch connector
(B) D706 terminal 3 and ground.
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.
Connector terminal
(Wire color)
ConditionVoltage (V)
(Approx.)
( + ) ( - )
26 (V) GroundBack door handle switch (ON) 0
Other (OFF) 5
LIIA0833E
3 (V) - 26 (V) : Continuity should exist.
3 (V) - 26 (V) : Continuity should not exist.
LIIA2262E
4 (B) - Ground : Continuity should exist.
WIIA0605E

BL-128
AUTOMATIC BACK DOOR SYSTEM
Revision: August 20072004 QX56
Cinch Latch Motor System InspectionEIS002TC
1. CINCH LATCH MOTOR CIRCUIT INSPECTION
1. Turn ignition switch OFF.
2. Disconnect back door latch and back door control unit.
3. Check continuity between back door control unit connector (A)
B55 terminals 11, 12 and back door latch (cinch latch motor)
connector (B) D503 terminals 1, 2.
4. Check continuity between back door latch (cinch latch motor)
connector (B) D503 terminals 1, 2 and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace harness.
2. 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 >> GO TO 3.
NG >> Replace the back door latch.
3. CINCH LATCH MOTOR SIGNAL INSPECTION
1. Reconnect back door latch and back door control unit.
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 >> Cinch latch motor circuit is OK.
NG >> Replace the back door control unit.1 (L) - 12 (L) : Continuity should exist.
2 (Y) - 11 (Y) : Continuity should exist.
1 (L) - ground : Continuity should not exist.
2 (Y) - ground : Continuity should not exist.
LIIA2263E
1 (+) - 2 (-) : It operates.
1 (-) - 2 (+) : It operates. (Reverse rotation)
LIIA1937E
11 (Y) - Ground
12 (L) - Ground
LIIA0836ESIIA1480E