2004 INFINITI QX56 sensor

LAN-12
[CAN]
CAN COMMUNICATION
Revision: August 20072004 QX56
Buzzer output signal R T
Fuel level sensor signal R T
ASCD SET lamp signal T R
ASCD CRUISE lamp signal T R
Malfunction indicator lamp signal T R
Fuel level low warning signal T R
Front wiper request signal T R
Front wiper stop position signal R T
Rear window defogger switch signal T R R
Rear window defogger control signal R R R T
Hood switch signal R T
Theft warning horn request signal T R
Horn chirp signal T R
Steering angle sensor signal T R
ABS warning lamp signal R T
VDC OFF indicator lamp signal R T
SLIP indicator lamp signal R T
Brake warning lamp signal R T
System setting signalRT
TR
Distance to empty signal T R
ASCD operation signal T R
ASCD OD cancel request T R
A/T CHECK indicator lamp signal T R
A/T position indicator lamp signal T R R
Tire pressure signal R T
Tire pressure data signal R T
1st position switch signal R T
4th position switch signal R T
Tow mode switch signal R T
A/T fluid temperature sensor signal T RSignals ECM TCMDriver
seat
con-
trol
unitCom-
bina-
tion
meterDis-
play
con-
trol
unitBCMSteer-
ing
angle
sen-
sorFront
air
con-
trolTrans-
fer
con-
trol
unitABS
actua-
tor
and
elec-
tric
unit
(con-
trol
unit)IPDM
E/R

LAN-14
[CAN]
CAN COMMUNICATION
Revision: August 20072004 QX56
A/C switch/indicator signalTR
RT
Cooling fan speed request signal T R R
Position light request signal R T R
Low beam request signal T R
Low beam status signal RT
High beam request signal R T R
High beam status signal RT
Front fog light request signal T R
Day time running light request
signalTR
Vehicle speed signalR RRT
RRR R T R R R
Sleep wake up signal R T R
Door switch signal R R R T R
Turn indicator signal R T
Key fob ID signal R T
Key fob door unlock signal R T
Buzzer output signalRT
TR
Fuel level sensor signal R T
Malfunction indicator lamp signal T R
Fuel level low warning signal T R
Front wiper request signal R T R
Front wiper stop position signal R T
Rear window defogger switch sig-
nalTR R
Rear window defogger control
signalRRRT
Hood switch signalRT
Theft warning horn request signal T R
Horn chirp signalTR
Steering angle sensor signal T R
ABS warning lamp signal R T
VDC OFF indicator lamp signal R R T
SLIP indicator lamp signal R T
Brake warning lamp signal R T
VDC operation signal R T
ABS malfunction signal R TSignals ECM TCMICC
sen-
sorICC
unitDriver
seat
con-
trol
unitCom-
bina-
tion
mete
rDis-
play
con-
trol
unitBCMStee r-
ing
angle
sen-
sorFront
air
con-
trolTran s -
fer
con-
trol
unitABS
actu-
ator
and
elec-
tric
unit
(con-
trol
unit)IPD
M
E/R

CAN COMMUNICATION
LAN-15
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: August 20072004 QX56
TCS malfunction signal R T
VDC malfunction signal R T
Brake pressure sensor signal R T
System setting signalRT
TR
Distance to empty signal T R
ASCD operation signal T R
ASCD OD cancel request T R
A/T CHECK indicator lamp signal T R
A/T position indicator lamp signal T R R R
Current gear position signal T R
Tire pressure signal R T
Tire pressure data signal R T
1st position switch signal R T
4th position switch signal R T
Tow mode switch signal R T
A/T fluid temperature sensor sig-
nalTR
ICC operation signal R R T
ICC OD cancel request signal R R T
ICC sensor signal T R
ICC system display signal T R
ICC steering switch signal T RSignals ECM TCMICC
sen-
sorICC
unitDriver
seat
con-
trol
unitCom-
bina-
tion
mete
rDis-
play
con-
trol
unitBCMStee r-
ing
angle
sen-
sorFront
air
con-
trolTra ns -
fer
con-
trol
unitABS
actu-
ator
and
elec-
tric
unit
(con-
trol
unit)IPD
M
E/R

CAN SYSTEM (TYPE 1)
LAN-35
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: August 20072004 QX56
Case 11
Check steering angle sensor circuit. Refer to LAN-46, "Steering Angle Sensor Circuit Check" .
PKIA8060E
PKIA8152E

LAN-46
[CAN]
CAN SYSTEM (TYPE 1)
Revision: August 20072004 QX56
Data Link Connector Circuit CheckUKS0018R
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the negative battery terminal.
3. Check terminals and connector of data link connector for damage, bend and loose connection (connector
side and harness side).
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.
2. CHECK HARNESS FOR OPEN CIRCUIT
Check resistance between data link connector M22 terminals 6 (W)
and 14 (R).
OK or NG
OK >> Diagnose again. Refer to LAN-21, "Work Flow" .
NG >> Repair harness between data link connector and combi-
nation meter.
Steering Angle Sensor Circuit CheckUKS0018S
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the negative battery terminal.
3. Check terminals and connector of steering angle sensor for damage, bend and loose connection (sensor
side and harness side).
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect steering angle sensor connector.
2. Check resistance between steering angle sensor harness con-
nector M47 terminals 3 (W) and 4 (R).
OK or NG
OK >> Replace steering angle sensor.
NG >> Repair harness between steering angle sensor and data
link connector. 6 (W) - 14 (R) : Approx. 54 - 66Ω
PKIA2077E
3 (W) - 4 (R) : Approx. 54 - 66Ω
PKIA6838E

LAN-48
[CAN]
CAN SYSTEM (TYPE 1)
Revision: August 20072004 QX56
IPDM E/R Circuit CheckUKS0018V
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the negative battery terminal.
3. Check terminals and connector of IPDM E/R for damage, bend and loose connection (control module side
and harness side).
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect IPDM E/R connector.
2. Check resistance between IPDM E/R harness connector E122
terminals 39 (W) and 40 (R).
OK or NG
OK >> Replace IPDM E/R.
NG >> Repair harness between IPDM E/R and harness con-
nector E152.
CAN Communication Circuit CheckUKS0018W
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the negative battery terminal.
3. Disconnect the following module and control unit connectors and check terminals for deformation, discon-
nection, looseness or damage.
–ECM
–A/T assembly
–Driver seat control unit
–Combination meter
–Display control unit
–BCM
–Steering angle sensor
–Front air control
–ABS actuator and electric unit (control unit)
–IPDM E/R
OK or NG
OK >> GO TO 2.
NG >> Repair or replace as necessary.39 (W) - 40 (R) : Approx. 108 - 132Ω
PKIA8141E

CAN SYSTEM (TYPE 2)
LAN-59
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: August 20072004 QX56
CHECK SHEET RESULTS (EXAMPLE)
NOTE:
If “NG” is displayed on “INITIAL DIAG (Initial diagnosis)” or “CAN COMM” for the diagnosed control unit,
replace the control unit.
Case 1
Check harness between TCM and ICC sensor. Refer to LAN-78, "Circuit Check Between TCM and ICC Sen-
sor" .
PKIA8089E
PKIA8800E

LAN-60
[CAN]
CAN SYSTEM (TYPE 2)
Revision: August 20072004 QX56
Case 2
Check harness between ICC sensor and ICC unit. Refer to LAN-79, "Circuit Check Between ICC Sensor and
ICC Unit" .
PKIA8090E
PKIA8801E