2008 INFINITI QX56 turn signal

DLK-134
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
BACK DOOR SWITCH
BACK DOOR SWITCH
Diagnosis ProcedureINFOID:0000000001539043
1.BACK DOOR AND GLASS HAT
CH SWITCH SIGNAL INSPECTION
1. Turn ignition switch OFF.
2. While operating the back door and glass hatch switch assembly (back door switch), check voltage between back door control
unit connector B55 terminal 26 and ground.
Is the inspection result normal?
YES >> Switch is OK.
NO >> GO TO 2
2.BACK DOOR AND GLASS HAT CH SWITCH CIRCUIT INSPECTION
1. Disconnect back door and glass hatch switch assemb ly (back door switch) and back door control unit.
2. Check continuity between back door control unit connector (A) B55 terminal 26 and back door and glass hatch switch assembly
(back door switch) connector (B) D706 terminal 3.
3. Check continuity between back door control unit connector (A) B55 terminal 26 and ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair the harness between the back door and gla ss hatch switch assembly (back door switch)
and the back door control unit.
3.BACK DOOR AND GLASS HAT CH SWITCH GROUND INSPECTION
Check continuity between back door and glass hatch switch assem-
bly (back door switch) connector D706 terminal 4 and ground.
Is the inspection result normal?
YES >> Replace the back door and glass hatch switch assembly (back door switch).
NO >> Repair the harness between the back door and glass hatch switch assembly (back door switch) and ground.
Te r m i n a l Measuring condition Voltage (V)
(Approx.)
(+) (-)
26 GroundPush the back door and glass
hatch switch assembly (back door switch) (ON) 0
Other (OFF) Battery voltage
LIIA0833E
26 - 3 : Continuity should exist.
26 - Ground : Continuity should not exist.
ALKIA1791ZZ
4 - Ground : Continuity should exist.
ALKIA1792ZZ
Revision: March 2010 2008 QX56

CINCH LATCH MOTOR SYSTEMDLK-135
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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CINCH LATCH MOTOR SYSTEM
Diagnosis ProcedureINFOID:0000000001539044
1.CINCH LATCH MOTOR SIGNAL INSPECTION
1. Turn ignition switch OFF.
2. While fully opening and closing the back door, check voltage between back door control unit c onnector B55 terminals 11, 12
and ground.
Is the inspection result normal?
YES >> GO TO 2
NO >> Replace the back door control unit.
2.CINCH LATCH MOTOR CIRCUIT INSPECTION
1. Disconnect back door latch and back door control unit connector.
2. Check continuity between back door control unit connector (A) B55 terminals 11, 12 and back door latch (cinch latch motor)
connector D705 (B) terminals 1, 2.
3. Check continuity between back door control unit connector (A) B55 terminals 11, 12 and ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair the harness between the back door latch (cinch latch motor) and the back door control unit.
3.CINCH LATCH MOTOR OPERATION INSPECTION
Connect battery power to terminals 1 and 2 on the back door latch
connector and check motor operation.
Is the inspection result normal?
YES >> Motor is OK.
NO >> Replace the back door latch.
11 - Ground
12 - Ground Battery voltage
LIIA2397E
11 - 2
: Continuity should exist.
12 - 1 : Continuity should exist.
11 - Ground : Continuity should not exist.
12 - Ground : Continuity should not exist.
ALKIA0679ZZ
1 (+) - 2 (-) : It operates.
1 (-) - 2 (+) : It operates. (Reverse rotation)
LIIA0838E
Revision: March 2010 2008 QX56

DLK-136
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
INTELLIGENT KEY UNIT POWER BACK DOOR INPUT SIGNAL
INTELLIGENT KEY UNIT POWER BACK DOOR INPUT SIGNAL
DescriptionINFOID:0000000001539045
Carrying the Intelligent Key, enables the driver to
open the liftgate using the back door switch even when the
vehicle is locked. When pressing the back door switch, the back door switch sends this signal to the Intelligent
Key unit which treats it as a request switch signal. When the Intelligent Key unit, using the rear bumper
antenna, validates the presence of the Intelligent Key, it sends an open signal to the back door control unit
regardless whether the vehicle is locked.
Rear bumper antenna is mounted on the rear bumper and is used to allow the back door handle opening of
the locked back door when the Intelligent Key is present.
Diagnosis ProcedureINFOID:0000000001539046
1.BACK DOOR SWITCH SIGNAL INSPECTION
With all doors unlocked, check the back door switch operation by pressing the back door switch.
Did the back door respond correctly by opening?
YES >> GO TO 2
NO >> Refer to DLK-134, "
Diagnosis Procedure".
2.KEYFOB SIGNAL INSPECTION
Check keyfob operation using lock and unlock buttons.
Did the keyfob operate correctly?
YES >> GO TO 3
NO >> Refer to DLK-102, "
Diagnosis Procedure".
3.INTELLIGENT KEY UNIT SIGNAL INSPECTION
NOTE:
Since the diode is a uni-directional component, pay close attention to the polarity of the ohmmeter
being used as the presence of a diode in the circuit will affect the result.
1. Turn ignition switch OFF.
2. Disconnect Intelligent Key unit, back door sw itch and back door control unit connectors.
3. Check continuity between Intelligent Key unit connector (A) M70 terminal 29 and back door switch connector (B) D706 terminal 3.
4. Check continuity between Intelligent Key unit connector (A) M70 terminal 29 and ground.
Is the inspection result normal?
YES >> Replace the Intelligent Key unit.
NO >> Repair or replace the harness or the diode as neces- sary.
29 (+) - 3 (-) : Continuity should exist.
29 (+) - Ground (-) : Conti
nuity should not exist.ALKIA1793ZZ
Revision: March 2010 2008 QX56

INTELLIGENT KEY UNIT POWER BACK DOOR OUTPUT SIGNAL
DLK-137
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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INTELLIGENT KEY UNIT POWE R BACK DOOR OUTPUT SIGNAL
DescriptionINFOID:0000000001539047
The keyfob of the Intelligent Key unit is capable of opening and closing the power back door. The driver can
open or close the liftgate by pressing the liftgate button regardless whether the vehicle is locked provided the
keyfob is within operating range.
Diagnosis ProcedureINFOID:0000000001539048
1.POWER LIFTGATE SWITCH FUNCTION INSPECTION
Check power liftgate switch using switch operation.
Did the back door respond correctly?
YES >> GO TO 2
NO >> Refer to DLK-121, "
Diagnosis Procedure".
2.KEYFOB SIGNAL INSPECTION
Check keyfob operation using lock and unlock buttons.
Did the keyfob operate correctly?
YES >> GO TO 3
NO >> Refer to DLK-102, "
Diagnosis Procedure".
3.INTELLIGENT KEY UNIT SIGNAL INSPECTION
1. Turn ignition switch OFF.
2. Disconnect Intelligent Key unit, back door cont rol unit and power liftgate switch connectors.
3. Check continuity between Intelligent Key unit connector (A) M70
terminal 23 and back door control unit connector (B) B55 termi-
nal 23.
4. Check continuity between Intelligent Key unit connector (A) M70 terminal 23 and ground.
Is the inspection result normal?
YES >> Replace Intelligent Key unit.
NO >> Repair or replace the harness as necessary. 23 - 23 : Continuity should exist.
23 - Ground : Continuity should not exist.
ALKIA0680ZZ
Revision: March 2010
2008 QX56

BCM (BODY CONTROL MODULE)DLK-143
< ECU DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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HEADLAMP SW1 Headlamp switch OFF OFF
Headlamp switch 1st
ON
HEADLAMP SW2 Headlamp switch OFF
OFF
Headlamp switch 1st ON
HI BEAM SW High beam switch OFF
OFF
High beam switch HI ON
IGN ON SW Ignition switch OFF or ACC
OFF
Ignition switch ON ON
IGN SW CAN Ignition switch OFF or ACC
OFF
Ignition switch ON ON
INT VOLUME Wiper intermittent dial is in a dial position 1 - 7 1 - 7
I-KEY LOCK LOCK button of Intelligent Key is not pressed
OFF
LOCK button of Intelligent Key is pressed ON
I-KEY UNLOCK UNLOCK button of Intelligent Key is not pressed
OFF
UNLOCK button of Intelligent Key is pressed ON
KEY ON SW Mechanical key is removed from key cylinder
OFF
Mechanical key is inserted to key cylinder ON
OIL PRESS SW • Ignition switch OFF or ACC
• Engine running
OFF
Ignition switch ON ON
PASSING SW Other than lighting switch PASS
OFF
Lighting switch PASS ON
REAR DEF SW Rear window defogger switch OFF
OFF
Rear window defogger switch ON ON
RR WASHER SW Rear washer switch OFF
OFF
Rear washer switch ON ON
RR WIPER INT Rear wiper switch OFF
OFF
Rear wiper switch INT ON
RR WIPER ON Rear wiper switch OFF
OFF
Rear wiper switch ON ON
RR WIPER STOP Rear wiper stop position
OFF
Other than rear wiper stop position ON
TAIL LAMP SW Lighting switch OFF
OFF
Lighting switch 1ST ON
TRNK OPNR SW When back door opener switch is not pressed
OFF
When back door opener switch is pressed ON
TURN SIGNAL L Turn signal switch OFF
OFF
Turn signal switch LH ON
TURN SIGNAL R Turn signal switch OFF
OFF
Turn signal switch RH ON
VEHICLE SPEED While driving Equivalent to speedo meter reading
Monitor Item
Condition Value/Status
Revision: March 2010 2008 QX56

BCM (BODY CONTROL MODULE)DLK-145
< ECU DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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Te r m i n a l Wire
color Signal name Signal
input/
output Measuring condition
Reference value or waveform
(Approx.)
Ignition
switch Operation or condition
1BR/W Ignition keyhole illumi-
nation Output OFFDoor is locked (SW OFF)
Battery voltage
Door is unlocked (SW ON) 0V
2SB Combination switch
input 5 Input ON
Lighting, turn, wiper OFF
Wiper dial position 4
3G/Y Combination switch
input 4 Input ONLighting, turn, wiper OFF
Wiper dial position 4
4Y Combination switch
input 3 Input ON
Lighting, turn, wiper OFF
Wiper dial position 4
5G/B Combination switch
input 2
Input ONLighting, turn, wiper OFF
Wiper dial position 4
6V Combination switch
input 1
9GR/R Rear window defogger
switch
Input ONRear window defogger switch
ON
0V
Rear window defogger switch
OFF 5V
10 G Hazard lamp flash Input OFF ON (opening or closing)
0V
OFF (other than above) Battery voltage
11 O Ignition switch (ACC
or ON)
InputACC or
ON Ignition switch ACC or ON
Battery voltage
12 R/L Front door switch RH Input OFF ON (open)
0V
OFF (closed) Battery voltage
13 GR Rear door switch RH Input OFF ON (open)
0V
OFF (closed) Battery voltage
15 L/W Tire pressure warning
check connector
Input OFF
—5V
18 P Remote keyless entry
receiver and optical
sensor (ground)
Output OFF
—0V
SKIA5291E
SKIA5292E
SKIA5291E
SKIA5292E
Revision: March 2010 2008 QX56

DLK-146
< ECU DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
BCM (BODY CONTROL MODULE)
19 V/WRemote keyless entry
receiver (power sup-
ply) Output OFF Ignition switch OFF
20 G/W Remote keyless entry
receiver (signal) Input OFFStand-by (keyfob buttons re-
leased)
When remote keyless entry
receiver receives signal from
keyfob (keyfob buttons
pressed)
21 G NATS antenna amp. Input OFF
→
ON Ignition switch (OFF
→ ON)Just after turning ignition switch
ON: Pointer of tester should
move for approx. 1 second, then return to battery voltage.
22 W/V BUS — —Ignition switch ON or power
window timer operates
23 G/O Security indicator
lamp Output OFF
Goes OFF
→ illuminates (Ev-
ery 2.4 seconds) Battery voltage
→ 0V
25 BR NATS antenna amp. Input OFF
→
ON Ignition switch (OFF
→ ON)Just after turning ignition switch
ON: Pointer of tester should
move for approx. 1 second, then return to battery voltage.
26 Y/L Rear wiper auto stop
switch 2 Input ONRise up position (rear wiper
arm on stopper)
0V
A Position (full clockwise stop
position) 0V
Forward sweep (counterclock-
wise direction) Fluctuating
B Position (full counterclock-
wise stop position) Battery voltage
Reverse sweep (clockwise di-
rection) Fluctuating
27 W/R Compressor ON sig-
nal Input ONA/C switch OFF
5V
A/C switch ON 0V
Te r m i n a l
Wire
color Signal name Signal
input/
output Measuring condition
Reference value or waveform
(Approx.)
Ignition
switch Operation or condition
LIIA1893E
LIIA1894E
LIIA1895E
PIIA2344E
Revision: March 2010
2008 QX56

BCM (BODY CONTROL MODULE)DLK-147
< ECU DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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28 L/R Front blower monitor Input ON Front blower motor OFF Battery voltage
Front blower motor ON
0V
29 W/B Hazard switch Input OFFON
0V
OFF 5V
30 Y/BR Glass hatch switch Input OFF Glass hatch switch released
Battery voltage
Glass hatch switch pressed 0
32 R/G Combination switch
output 5
Output ONLighting, turn, wiper OFF
Wiper dial position 4
33 R/Y Combination switch
output 4 Output ONLighting, turn, wiper OFF
Wiper dial position 4
34 L Combination switch
output 3 Output ON
Lighting, turn, wiper OFF
Wiper dial position 4
35 O/B Combination switch
output 2
Output ONLighting, turn, wiper OFF
Wiper dial position 4
36 R/W Combination switch
output 1
37 B/R Key switch and igni-
tion knob switch Input OFFIntelligent Key inserted
Battery voltage
Intelligent Key inserted 0V
38 W/L Ignition switch (ON) Input ON —Battery voltage
39 L CAN-H — —— —
40 P CAN-L — —— —
42 GR Glass hatch ajar
switch Input ONGlass hatch open
0
Glass hatch closed Battery
43 R/B Back door latch (door
ajar switch) Input OFFON (open)
0V
OFF (closed) Battery voltage
Te r m i n a l
Wire
color Signal name Signal
input/
output Measuring condition
Reference value or waveform
(Approx.)
Ignition
switch Operation or condition
SKIA5291E
SKIA5292E
SKIA5291E
SKIA5292E
Revision: March 2010
2008 QX56