INFINITI QX56 2010 Factory Service Manual

BCS
COMBINATION SWITCH INPUT CIRCUITBCS-35
< COMPONENT DIAGNOSIS > [BCM]
C
D
E
F
G H
I
J
K L
B A
O P
N
COMBINATION SWITCH
INPUT CIRCUIT
Diagnosis ProcedureINFOID:0000000005146422
Regarding Wiring Diagram information, refer to BCS-49, "Wiring Diagram".
1. CHECK INPUT 1 - 5 SYSTEM CIRCUIT FOR OPEN
1. Turn ignition switch OFF.
2. Disconnect BCM and combination switch.
3. Check continuity between BCM harness connector and combi- nation switch harness connector.
Does continuity exist?
YES >> GO TO 2
NO >> Repair or replace harness.
2. CHECK INPUT 1 - 5 SYSTEM CIRCUIT FOR SHORT
Check for continuity between BCM harness connector and ground.
Does continuity exist?
YES >> Repair or replace harness.
NO >> GO TO 3
3. CHECK BCM OUTPUT VOLTAGE
1. Connect BCM.
2. Turn ignition switch ON.
3. Check voltage between BCM harness connector and ground.
System BCM
Combination switch
Continuity
Connector Terminal Connector Terminal
INPUT 1
M18(A) 6
M28(B) 6
Ye s
INPUT 2
57
INPUT 3 410
INPUT 4 39
INPUT 5 28
ALMIA0275ZZ
SystemBCM
GroundContinuity
Connector Terminal
INPUT 1
M186
No
INPUT 2
5
INPUT 3 4
INPUT 4 3
INPUT 5 2
ALMIA0276ZZ
ALMIA0277ZZ
Revision: April 20092010 QX56

BCS-36
< COMPONENT DIAGNOSIS >[BCM]
COMBINATION SWITCH INPUT CIRCUIT
Is the measurement value normal?
YES >> GO TO 4
NO >> Replace BCM. Refer to
BCS-59, "
Removal and Installation".
4. CHECK COMBINATION SWITCH
Check combination switch. Refer to BCS-38, "
Description".
Is the check result normal?
YES >> Replace BCM. Refer to BCS-59, "Removal and Installation".
NO >> Replace the combination switch (applicable parts). Refer to EXL-154, "
Removal and Installation".
Special Repair RequirementINFOID:0000000005146423
1. ADDITIONAL SERVICE WHEN REPLACING BCM
>> Refer to BCS-3, "
ADDITIONAL SERVICE WHEN REPLAC ING CONTROL UNIT : Special Repair
Requirement".
SystemTe r m i n a l s
Vo l ta g e
(Approx.)
(+)
(− )
BCM
Ground
Connector Terminal
INPUT 1
M186
Refer to BCS-
40, "Refer-
ence Value".
INPUT 2
5
INPUT 3 4
INPUT 4 3
INPUT 5 2
Revision: April 20092010 QX56

BCS
COMBINATION SWITCH OUTPUT CIRCUITBCS-37
< COMPONENT DIAGNOSIS > [BCM]
C
D
E
F
G H
I
J
K L
B A
O P
N
COMBINATION SWITCH
OUTPUT CIRCUIT
Diagnosis ProcedureINFOID:0000000005146424
Regarding Wiring Diagram information, refer to BCS-49, "Wiring Diagram".
1. CHECK OUTPUT 1 - 5 SYSTEM CIRCUIT FOR OPEN
1. Turn ignition switch OFF.
2. Disconnect BCM and combination switch.
3. Check continuity between BCM harness connector and combi- nation switch harness connector.
Does continuity exist?
YES >> GO TO 2
NO >> Repair or replace harness.
2. CHECK OUTPUT 1 - 5 SYSTEM CIRCUIT FOR SHORT
Check for continuity between BCM harness connector and ground.
Does continuity exist?
YES >> Repair or replace harness.
NO >> GO TO 3
3. CHECK COMBINATION SWITCH
Check combination switch. Refer to BCS-38, "
Description".
Is the check result normal?
YES >> Replace BCM. Refer to BCS-59, "Removal and Installation".
NO >> Replace combination switch (applicable parts). Refer to EXL-154, "
Removal and Installation".
Special Repair RequirementINFOID:0000000005146425
1. ADDITIONAL SERVICE WHEN REPLACING BCM
>> Refer to BCS-3, "
ADDITIONAL SERVICE WHEN REPLAC ING CONTROL UNIT : Special Repair
Requirement".
SystemBCM
Combination switch
Continuity
Connector Terminal Connector Terminal
OUTPUT 1
M18(A) 36
M28(B) 1
Ye s
OUTPUT 2
352
OUTPUT 3 343
OUTPUT 4 334
OUTPUT 5 325
ALMIA0278ZZ
SystemBCM
GroundContinuity
Connector Terminal
OUTPUT 1
M1836
No
OUTPUT 2
35
OUTPUT 3 34
OUTPUT 4 33
OUTPUT 5 32
ALMIA0279ZZ
Revision: April 20092010 QX56

BCS-38
< COMPONENT DIAGNOSIS >[BCM]
COMBINATION SWITCH
COMBINATION SWITCH
DescriptionINFOID:0000000005146426
COMBINATION SWITCH MATRIX
Combination switch consists of INPUT circuit and OUTPUT circuit.
Combination switch circuit
Combination switch INPUT-OUTPUT system list
NOTE:
Headlamp has a dual system switch.
Diagnosis ProcedureINFOID:0000000005146427
1. CHECK LIGHT & TURN SIGNAL SWITCH
Check operation with normal light and turn signal switch installed.
Does it operate normally?
YES >> Replace light and turn signal switch. Refer to EXL-154, "Removal and Installation".
NO >> GO TO 2
2. CHECK WIPER & WASHER SWITCH
Check operation with normal wiper and washer switch installed.
Does it operate normally?
YES >> Replace wiper and washer switch. Refer to WW-85, "Wiper and Washer Switch".
SystemOUTPUT 1 OUTPUT 2 OUTPUT 3 OUTPUT 4 OUTPUT 5
INPUT 1 —FR WASHER FR WIPER LOW TURN LH TURN RH
INPUT 2 FR WIPER HI —FR WIPER INT PASSING HEADLAMP 1
INPUT 3 INT VOLUME 1 RR WASHER —HEADLAMP 2 HI BEAM
INPUT 4 RR WIPER INT INT VOLUME 3 AUTO LIGHT —TAIL LAMP
INPUT 5 INT VOLUME 2 RR WIPER —FR FOG —
LIIA0760E
Revision: April 20092010 QX56

BCS
COMBINATION SWITCHBCS-39
< COMPONENT DIAGNOSIS > [BCM]
C
D
E
F
G H
I
J
K L
B A
O P
N
NO >> GO TO 3
3. CHECK SWITCH BASE
(SPIRAL CABLE)
Check operation with normal switch base (spiral cable) installed.
Does it operate normally?
YES >> Replace switch base (spiral cable). Refer to SR-7, "Removal and Installation".
NO >> Combination switch is normal.
Revision: April 20092010 QX56

BCS-40
< ECU DIAGNOSIS >[BCM]
BCM (BODY CONTROL MODULE)
ECU DIAGNOSIS
BCM (BODY CONTROL MODULE)
Reference ValueINFOID:0000000005146428
VALUES ON THE DIAGNOSIS TOOL
Monitor Item
Condition Value/Status
AIR COND SW A/C switch OFF
OFF
A/C switch ON ON
AUT LIGHT SYS Outside of the room is dark
OFF
Outside of the room is bright ON
AUTO LIGHT SW Lighting switch OFF
OFF
Lighting switch AUTO ON
BACK DOOR SW Back door closed
OFF
Back door opened ON
CARGO LAMP SW Cargo lamp switch OFF
OFF
Cargo lamp switch ON ON
CDL LOCK SW Door lock/unlock switch does not operate
OFF
Press door lock/unlock switch to the LOCK side ON
CDL UNLOCK SW Door lock/unlock switch does not operate
OFF
Press door lock/unlock switch to the UNLOCK side ON
DOOR SW-AS Front door RH closed
OFF
Front door RH opened ON
DOOR SW-DR Front door LH closed
OFF
Front door LH opened ON
DOOR SW-RL Rear door LH closed
OFF
Rear door LH opened ON
DOOR SW-RR Rear door RH closed
OFF
Rear door RH opened ON
ENGINE RUN Engine stopped
OFF
Engine running ON
FR FOG SW Front fog lamp switch OFF
OFF
Front fog lamp switch ON ON
FR WASHER SW Front washer switch OFF
OFF
Front washer switch ON ON
FR WIPER LOW Front wiper switch OFF
OFF
Front wiper switch LO ON
FR WIPER HI Front wiper switch OFF
OFF
Front wiper switch HI ON
FR WIPER INT Front wiper switch OFF
OFF
Front wiper switch INT ON
FR WIPER STOP Any position other than front wiper stop position
OFF
Front wiper stop position ON
HAZARD SW When hazard switch is not pressed
OFF
When hazard switch is pressed ON
Revision: April 20092010 QX56

BCS
BCM (BODY CONTROL MODULE)BCS-41
< ECU DIAGNOSIS > [BCM]
C
D
E
F
G H
I
J
K L
B A
O P
N
LIGHT SW 1ST
Lighting switch OFF OFF
Lighting switch 1st
ON
HEAD LAMP SW1 Headlamp switch OFF
OFF
Headlamp switch 1st ON
HEAD LAMP 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 CYL LK-SW Door key cylinder LOCK position
ON
Door key cylinder other than LOCK position OF
KEY CYL UN-SW Door key cylinder UNLOCK position
ON
Door key cylinder other than UNLOCK position 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
OPTICAL SENSOR Bright outside of the vehicle
Close to 5V
Dark outside of the vehicle Close to 0V
PASSING SW Other than lighting switch PASS
OFF
Lighting switch PASS ON
PUSH SW Return to ignition switch to LOCK position
OFF
Press ignition switch 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
RR WIPER STP2 Rear wiper stop position
OFF
Other than rear wiper stop position ON
Monitor Item
Condition Value/Status
Revision: April 20092010 QX56

BCS-42
< ECU DIAGNOSIS >[BCM]
BCM (BODY CONTROL MODULE)
TRNK OPNR SWWhen 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 speedometer reading
Monitor Item
Condition Value/Status
Revision: April 20092010 QX56

BCS
BCM (BODY CONTROL MODULE)BCS-43
< ECU DIAGNOSIS > [BCM]
C
D
E
F
G H
I
J
K L
B A
O P
N
Terminal LayoutINFOID:0000000005146429
Physical ValuesINFOID:0000000005146430
LIIA2443E
Revision: April 20092010 QX56

BCS-44
< ECU DIAGNOSIS >[BCM]
BCM (BODY CONTROL MODULE)
Te r m i n a lWire
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: April 20092010 QX56