INFINITI QX56 2008 Factory Service Manual

TRAILER TOWEXL-93
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ABLIA2474GB
Revision: March 2010 2008 QX56

EXL-94
< COMPONENT DIAGNOSIS >
TRAILER TOW
ABLIA2475GB
Revision: March 20102008 QX56

TRAILER TOWEXL-95
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ABLIA2476GB
Revision: March 2010 2008 QX56

EXL-96
< COMPONENT DIAGNOSIS >
TRAILER TOW
ABLIA2477GB
Revision: March 20102008 QX56

TRAILER TOWEXL-97
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ABLIA2478GB
Revision: March 2010 2008 QX56

EXL-98
< COMPONENT DIAGNOSIS >
TRAILER TOW
ABLIA2479GB
Revision: March 20102008 QX56

BCM (BODY CONTROL MODULE)EXL-99
< ECU DIAGNOSIS >
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ECU DIAGNOSIS
BCM (BODY CONTROL MODULE)
DescriptionINFOID:0000000001547151
REFERENCE VALUES FOR BCM
For BCM reference values, refer to BCS-38, "Reference Value".
TERMINAL LAYOUT FOR BCM
For the terminal layout for the BCM, refer to BCS-40, "Terminal Layout".
PHYSICAL VALUES FOR BCM
For physical values for the BCM, refer to BCS-40, "Physical Values".
WIRING DIAGRAM - BCM
For the BCM wiring diagram, refer to BCS-46, "Wiring Diagram".
DTC INSPECTION PRIORITY CHART - BCM
For the BCM DTC inspection priority chart, refer to BCS-50, "DTCInspectionPriorityChart".
DTC INDEX - BCM
For the BCM DTC index, refer to BCS-50, "DTCIndex".
Revision: March 2010 2008 QX56

EXL-100
< ECU DIAGNOSIS >
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE
ROOM)
DescriptionINFOID:0000000001547152
REFERENCE VALUES FOR IPDM E/R
For IPDM E/R reference values, refer to PCS-19, "Reference Value".
TERMINAL LAYOUT FOR IPDM E/R
For the terminal layout for the IPDM E/R, refer to PCS-21, "Terminal Layout".
PHYSICAL VALUES FOR IPDM E/R
For physical values for the IPDM E/R, refer to PCS-21, "Physical Values".
WIRING DIAGRAM - IPDM E/R
For the IPDM E/R wiring diagram, refer to PCS-26, "Wiring Diagram".
FAIL SAFE - IPDM E/R
For IPDM E/R fail safe information, refer to PCS-29, "FailSafe".
DTC INDEX - IPDM E/R
For the IPDM E/R DTC index, refer to PCS-31, "DTCIndex".
Revision: March 2010 2008 QX56

EXTERIOR LIGHTING SYSTEM SYMPTOMSEXL-101
< SYMPTOM DIAGNOSIS >
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SYMPTOM DIAGNOSIS
EXTERIOR LIGHTING SYSTEM SYMPTOMS
Symptom TableINFOID:0000000001547153
CAUTION:
Perform the self-diagnosis with CONS ULT-III before the symptom diagnosis. Perform the trouble diag-
nosis if any DTC is detected.
Symptom Possible causeInspection item
Headlamp does not
switch to the high beam. One side•Fuse
• Harness between IPDM E/R
and the front combination lamp
• Front combination lamp
(High beam relay)
• IPDM E/R Headlamp (HI) circuit
Refer to
EXL-28
.
Both sides Symptom diagnosis
"BOTH SIDE HEADLAMPS DO NOT SWITCH TO HIGH BEAM"
Refer to EXL-104
.
High beam indicator lamp is not turned ON.
(Headlamp switches to the high beam.) • Combination meter
•BCM• Combination meter.
Data monitor "HI-BEAM IND"
• BCM (HEAD LAMP) Active test "HEADLAMP"
Headlamp does not
switch to the low beam. One side
Front combination lamp (Low
beam relay)
—
Both sides • Combination switch
• Harness between the combina-
tion switch and BCM
•BCM Combination switch
Refer to
BCS-36
.
High beam request signal
•BCM
• IPDM E/R IPDM E/R
Data monitor "HL HI REQ"
IPDM E/R —
Headlamp does not turn
ON. One side•Fuse
•Bulb
• Harness between IPDM E/R
and the front combination lamp
• Front combination lamp
• IPDM E/R Headlamp (LO) circuit
Refer to
EXL-30
.
Both sides Symptom diagnosis
"BOTH SIDE HEADLAMPS (LO) ARE NOT TURNED ON"
Refer to EXL-105, "
Description".
Headlamp does not turn
OFF. When the ignition
switch is turned ON
•BCM
• Combination switch Combination switch
Refer to
BCS-36
.
The ignition switch is
turned OFF (After acti-
vating the battery sav-
er). IPDM E/R
—
Headlamp is not turned ON/OFF with the lighting
switch AUTO. • Combination switch
• Harness between the combina-
tion switch and BCM
•BCM Combination switch
Refer to
BCS-36
.
• Optical sensor
• Harness between the optical sensor and BCM
•BCM Optical sensor
Refer to
EXL-40
.
Revision: March 2010 2008 QX56

EXL-102
< SYMPTOM DIAGNOSIS >
EXTERIOR LIGHTING SYSTEM SYMPTOMS
Daytime light system does not activate.• Either high beam bulb
• Parking brake switch
• Combination switch
•BCM
• IPDM E/R
• Daytime light relay
• Harness between IPDM E/R
and daytime light relay. Daytime light system description.
Refer to EXL-9, "System Descrip-
tion".
Front fog lamp is not
turned ON. One side
• Front fog lamp bulb
• Harness between IPDM E/R
and the front combination lamp
• Front combination lamp
• IPDM E/R Front fog lamp circuit
Refer to EXL-32
.
Both sides Symptom diagnosis
"BOTH SIDE FRONT FOG LAMPS ARE NOT TURNED ON"
Refer to
EXL-107
.
Parking lamp is not turned
ON. One side•Fuse
• Parking lamp bulb
• Harness between IPDM E/R
and the front/rear combination
lamp
• Front/rear combination lamp
• IPDM E/R Parking lamp
circuit
Refer to EXL-34
.
Both sides Symptom diagnosis
"PARKING, LICENSE PLATE AND TAIL LAMPS ARE NOT TURNED
ON"
Refer to
EXL-106
.
Turn signal lamp does not
blink. Indicator lamp is nor-
mal.
(The applicable side
performs the high flash-
er activation).• Harness between BCM and
each turn signal lamp
• Turn signal lamp bulb
• Door mirror Turn signal lamp circuit
Refer to EXL-37
.
Turn signal indicator lamp
does not blink. One side
Combination meter —
Both sides
(Always) • Turn signal indicator lamp sig-
nal
• Combination meter
•BCM • Combination meter.
Data monitor "TURN IND"
•BCM (FLASHER)
Active test "FLASHER"
Both sides
(Does blink when acti-
vating the hazard warn-
ing lamp with the
ignition switch OFF) • The combination meter power
supply and the ground circuit
• Combination meter Combination meter
Power supply and the ground circuit
Refer to MWI-30
.
Symptom
Possible causeInspection item
Revision: March 2010 2008 QX56