2008 INFINITI QX56 Factory Service Manual

winter tyres transmission fluid engine coolant wipers fuses check engine

Page 2497 of 4083

INFINITI QX56 2008 Factory Service Manual LAN-2
MAIN LINE BETWEEN TCM AND LASER
CIRCUIT .............................................................
63
Diagnosis Procedure ........................................... ...63
MAIN LINE BETWEEN

LAN-2
MAIN LINE BETWEEN TCM AND LASER
CIRCUIT .............................................................
63
Diagnosis Procedure ........................................... ...63
MAIN LINE BETWEEN LASER AND ICC CIR-
CUIT ...................................................................
64
Diagnosis Procedure ........................................... ...64
MAIN LINE BETWEEN ICC AND ADP CIR-
CUIT ...................................................................
65
Diagnosis Procedure ........................................... ...65
MAIN LINE BETWEEN ADP AND AV CIR-
CUIT ...................................................................
66
Diagnosis Procedure ........................................... ...66
MAIN LINE BETWEEN AV AND DLC CIR-
CUIT ...................................................................
67
Diagnosis Procedure ........................................... ...67
MAIN LINE BETWEEN DLC AND M&A CIR-
CUIT ...................................................................
68
Diagnosis Procedure ........................................... ...68
MAIN LINE BETWEEN M&A AND ABS CIR-
CUIT ...................................................................
69
Diagnosis Procedure ........................................... ...69
ECM BRANCH LINE CIRCUIT ..........................70
Diagnosis Procedure ........................................... ...70
TCM BRANCH LINE CIRCUIT ..........................71
Diagnosis Procedure ........................................... ...71
LASER BRANCH LINE CIRCUIT ......................72
Diagnosis Procedure ........................................... ...72
ICC BRANCH LINE CIRCUIT ............................73
Diagnosis Procedure ............................................ ...73
ADP BRANCH LINE CIRCUIT ..........................74
Diagnosis Procedure ............................................ ...74
AV BRANCH LINE CIRCUIT .............................75
Diagnosis Procedure ............................................ ...75
BCM BRANCH LINE CIRCUIT ..........................76
Diagnosis Procedure ............................................ ...76
DLC BRANCH LINE CIRCUIT ..........................77
Diagnosis Procedure ............................................ ...77
HVAC BRANCH LINE CIRCUIT ........................78
Diagnosis Procedure ............................................ ...78
I-KEY BRANCH LINE CIRCUIT ........................79
Diagnosis Procedure ............................................ ...79
M&A BRANCH LINE CIRCUIT ..........................80
Diagnosis Procedure ............................................ ...80
STRG BRANCH LINE CIRCUIT ........................81
Diagnosis Procedure ............................................ ...81
4WD BRANCH LINE CIRCUIT ..........................82
Diagnosis Procedure ............................................ ...82
ABS BRANCH LINE CIRCUIT ..........................83
Diagnosis Procedure ............................................ ...83
IPDM-E BRANCH LINE CIRCUIT .....................84
Diagnosis Procedure ............................................ ...84
CAN COMMUNICATION CIRCUIT ...................85
Diagnosis Procedure ............................................ ...85
Revision: March 2010 2008 QX56

Page 2498 of 4083

INFINITI QX56 2008 Factory Service Manual LAN
PRECAUTIONSLAN-3
< PRECAUTION > [CAN FUNDAMENTAL]
C
D
E
F
G H
I
J
K L
B A
O P
N
PRECAUTION
PRECAUTIONS
Precaution for Trouble DiagnosisINFOID:0000000001374959
CAUTION:
• Never apply 7.0 V or mor

Page 2499 of 4083

INFINITI QX56 2008 Factory Service Manual LAN-4
< FUNCTION DIAGNOSIS >[CAN FUNDAMENTAL]
CAN COMMUNICATION SYSTEM
FUNCTION DIAGNOSIS
CAN COMMUNICATION SYSTEM
System DescriptionINFOID:0000000001374961
• CAN communication is a multiplex commun

Page 2500 of 4083

INFINITI QX56 2008 Factory Service Manual LAN
CAN COMMUNICATION SYSTEMLAN-5
< FUNCTION DIAGNOSIS > [CAN FUNDAMENTAL]
C
D
E
F
G H
I
J
K L
B A
O P
N
CAN Communication Control CircuitINFOID:0000000001374963
*: These are the only control units wi

Page 2501 of 4083

INFINITI QX56 2008 Factory Service Manual LAN-6
< FUNCTION DIAGNOSIS >[CAN FUNDAMENTAL]
DIAG ON CAN
DIAG ON CAN
DescriptionINFOID:0000000001374964
“Diag on CAN” is a diagnosis using CAN communication instead of previous DDL1 and DDL2 comm

Page 2502 of 4083

INFINITI QX56 2008 Factory Service Manual LAN
TROUBLE DIAGNOSISLAN-7
< FUNCTION DIAGNOSIS > [CAN FUNDAMENTAL]
C
D
E
F
G H
I
J
K L
B A
O P
N
TROUBLE DIAGNOSIS
Condition of Error DetectionINFOID:0000000001374966
“U1000” or “U1001” is in

LAN
TROUBLE DIAGNOSISLAN-7
< FUNCTION DIAGNOSIS > [CAN FUNDAMENTAL]
C
D
E
F
G H
I
J
K L
B A
O P
N
TROUBLE DIAGNOSIS
Condition of Error DetectionINFOID:0000000001374966
“U1000” or “U1001” is indicated on SELF-DIAG RESULTS on CONSULT-III if CAN communication signal is
not transmitted or received between units for 2 seconds or more.
CAN COMMUNICATION SYSTEM ERROR
• CAN communication line open (CAN-H, CAN-L, or both)
• CAN communication line short (ground, betw
een CAN communication lines, other harnesses)
• Error of CAN communication control circuit of the unit connected to CAN communication line
WHEN “U1000” OR “U1001” IS INDICATED EV EN THOUGH CAN COMMUNICATION SYSTEM IS
NORMAL
• Removal/installation of parts: Error may be detec ted when removing and installing CAN communication unit
and related parts while turning the ignition switch ON. (A DTC except for CAN communication may be
detected.)
• Fuse blown out (removed): CAN communication of the unit may cease.
• Voltage drop: Error may be detected if voltage drops due to discharged battery when turning the ignition
switch ON (Depending on the control unit which carries out CAN communication).
• Error may be detected if the power supply circuit of the control unit, which carries out CAN communication,
malfunctions (Depending on the control unit which carries out CAN communication).
• Error may be detected if reprogramming is not completed normally.
NOTE:
CAN communication system is normal if “U1000” or “U 1001” is indicated on SELF-DIAG RESULTS of CON-
SULT-III under the above conditions. Erase the memory of the self-diagnosis of each unit.
Symptom When Error Occurs in CAN Communication SystemINFOID:0000000001374967
In CAN communication system, multiple units mutually transmit and receive signals. Each unit cannot transmit
and receive signals if any error occurs on CAN communicati on line. Under this condition, multiple control units
related to the root cause malfunction or go into fail-safe mode.
ERROR EXAMPLE
NOTE:
• Each vehicle differs in symptom of each unit under fail-safe mode and CAN communication line wiring.
• Refer to LAN-36, "
Abbreviation List" for the unit abbreviation.
Example: TCM branch line open circuit
SKIB8738E
Unit name Symptom
ECM Engine torque limiting is affected, and shift harshness increases.
BCM Reverse warning chime does not sound.
Revision: March 2010 2008 QX56

Page 2503 of 4083

INFINITI QX56 2008 Factory Service Manual LAN-8
< FUNCTION DIAGNOSIS >[CAN FUNDAMENTAL]
TROUBLE DIAGNOSIS
Example: Data link connector branch line open circuit
NOTE:
• When data link connector branch line is open, transmission and reception

Page 2504 of 4083

INFINITI QX56 2008 Factory Service Manual LAN
TROUBLE DIAGNOSISLAN-9
< FUNCTION DIAGNOSIS > [CAN FUNDAMENTAL]
C
D
E
F
G H
I
J
K L
B A
O P
N
Example: Main Line Between Data Link Connector and ABS Actuator and Electr
ic Unit (Control Unit) Open

Load next 8 pages

Page: < prev 1-10 ... 2465-2472 2473-2480 2481-2488 2489-2496 2497-2504 2505-2512 2513-2520 2521-2528 2529-2536 ... 4088 next >

boot transmission fluid lock center console airbag off brake pads