2011 INFINITI QX56 Factory Service Manual

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INFINITI QX56 2011 Factory Service Manual
TOW MODE SYSTEMTM-153
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TOW MODE SYSTEM
Component Function CheckINFOID:0000000006226876
1.CHECK TOW MODE INDICATOR LAMP FUNCTION

TOW MODE SYSTEMTM-153
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TOW MODE SYSTEM
Component Function CheckINFOID:0000000006226876
1.CHECK TOW MODE INDICATOR LAMP FUNCTION
1. Turn ignition switch ON.
2. Check that tow mode indicator lamp turn s ON/OFF when tow mode switch is operated.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to TM-153, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006226877
NOTE:
Tow mode switch is integrated in to SNOW MODE/T OW MODE/VDC OFF switch assembly (2WD models) or
4WD switch assembly (4WD models).
1.CHECK DTC OF TCM
With CONSULT-III
1. Turn ignition switch ON.
2. Perform “Self-Diagnostic Results” in “TRANSMISSION”.
Is any DTC detected?
YES >> Check DTC detect ed item. Refer to TM-78, "DTC Index".
NO >> GO TO 2.
2.CHECK DTC OF COMBINATION METER
With CONSULT-III
Perform “Self-Diagnostic Re sults” in “METER/M&A”.
Is any DTC detected?
YES >> Check DTC detect ed item. Refer to MWI-43, "DTC Index".
NO >> GO TO 3.
3.CHECK COMBINATION METER
With CONSULT-III
1. Select “TOW MODE IND” in “Data Monitor” in “METER/M&A”.
2. Check that “TOW MODE IND” turns ON/OFF when tow mode switch is operated.
Is the inspection result normal?
YES >> Replace combination meter. Refer to MWI-85, "Exploded View".
NO >> GO TO 4.
4.CHECK TOW MODE SWITCH SIGNAL
With CONSULT-III
1. Select “TOW MODE SW” in “Data Monitor” in “TRANSMISSION”.
2. Check that “TOW MODE SW” turns ON /OFF when tow mode switch is operated.
Is the inspection result normal?
YES >> Replace combination meter. Refer to MWI-85, "Exploded View".
NO >> GO TO 5.
5.CHECK TOW MODE SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect SNOW MODE/TOW MODE/VDC OFF switch assembly (2WD models) or 4WD switch assem-
bly connector (4WD models).
3. Turn ignition switch ON.
4. Check voltage between SNOW MODE/TOW MODE/VDC OFF switch assembly (2WD models) or 4WD
switch assembly connector (4WD models) vehicle side harness connector terminals.
Revision: 2010 May2011 QX56

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INFINITI QX56 2011 Factory Service Manual
TM-154
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TOW MODE SYSTEM
*1: 2WD models
*2: 4WD models
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 9.
6.CHECK TOW MODE SWITCH
Check tow mode swi

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INFINITI QX56 2011 Factory Service Manual
TOW MODE SYSTEMTM-155
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*1: 2WD models
*2: 4WD models
Is the inspection result normal?
YES >> GO TO 11.
NO >> Repair or replace

TOW MODE SYSTEMTM-155
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*1: 2WD models
*2: 4WD models
Is the inspection result normal?
YES >> GO TO 11.
NO >> Repair or replace damaged parts.
11 .CHECK HARNESS BETWEEN SNOW MODE/TOW MODE/VDC OFF SWITCH ASSEMBLY (2WD MOD-
ELS) OR 4WD SWITCH ASSEMBLY (4WD MODELS) AND COMBINATION METER (PART 2)
Check continuity between SNOW MODE/TOW MODE/V DC OFF switch assembly (2WD models) or 4WD
switch assembly connector (4WD models) vehicle side harness connector terminal and ground.
*1: 2WD models
*2: 4WD models
Is the inspection result normal?
YES >> GO TO 12.
NO >> Repair or replace damaged parts.
12.CHECK COMBINATION METER
1. Reconnect all the connectors.
2. Check combination meter input/output signal. Refer to MWI-35, "
Reference Value".
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-40, "Intermittent Incident".
NO >> Replace combination meter. Refer to MWI-85, "
Exploded View".
Component InspectionINFOID:0000000006226878
NOTE:
Tow mode switch is integrated in to SNOW MODE/T OW MODE/VDC OFF switch assembly (2WD models) or
4WD switch assembly (4WD models).
1.CHECK TOW MODE SWITCH
Check continuity between SNOW MODE/TOW MODE/V DC OFF switch assembly (2WD models) or 4WD
switch assembly (4WD models) connector terminals.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace tow mode switch. Refer to TM-181, "
Removal and Installation".
SNOW MODE/TOW MODE/VDC OFF switch as-
sembly (2WD models) or 4WD switch assembly (4WD models) Combination meter
Continuity
Connector Terminal Connector Terminal M54
*1
M147*223 M34 7 Existed
SNOW MODE/TOW MODE/VDC OF F switch assembly (2WD
models) or 4WD switch assembly (4WD models)
GroundContinuity
Connector Terminal
M54
*1
M147*223 Not existed
SNOW MODE/TOW MODE/VDC OF F switch assembly (2WD
models) or 4WD switch assembly (4WD models) Condition Continuity
Te r m i n a l
23 20 Tow mode switch is depressed Existed
Tow mode switch is released Not existed
Revision: 2010 May2011 QX56

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INFINITI QX56 2011 Factory Service Manual
TM-156
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SHIFT POSITION INDICATOR CIRCUIT
SHIFT POSITION INDICATOR CIRCUIT
DescriptionINFOID:0000000006226879
TCM transmits a shift position signal to the combin

TM-156
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SHIFT POSITION INDICATOR CIRCUIT
SHIFT POSITION INDICATOR CIRCUIT
DescriptionINFOID:0000000006226879
TCM transmits a shift position signal to the combination meter via CAN communication line. While the vehicle
is running, the combination meter displays a shift position in the information display, according to this signal.
Refer to
MWI-9, "
METER SYSTEM : System Diagram".
Component Function CheckINFOID:0000000006226880
1.CHECK A/T INDICATOR
CAUTION:
Always drive vehicle at a safe speed.
1. Start the engine.
2. Check the actual selector lever position (“P”, “R”, “N” and “D”) and the indication of the shift position indi-
cator mutually coincide.
3. Drive vehicle in the manual mode, and then check that the actual gear position and the indication of the
shift position indicator mutually coincide when the sele ctor lever is shifted to “UP (+ side)” or “DOWN (−
side)” side (1GR ⇔ 7GR).
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to TM-156, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006226881
1.CHECK INPUT SIGNALS
With CONSULT-III
1. Start the engine.
2. Select “SLCT LVR POSI” in “Data Monitor” in “TRANSMISSION”.
3. Check the actual selector lever position (“P”, “R”, “N” and “D”) and the indication of the “SLCT LVR POSI”
mutually coincide. Refer to TM-68, "
Reference Value".
4. Drive vehicle in the manual mode, and then check that the actual gear position and the indication of the
“SLCT LVR POSI” mutually coincide when the selector lever is shifted to the “UP (+ side)” or “DOWN (−
side)” side (1GR ⇔ 7GR). Refer to TM-68, "
Reference Value".
Is the inspection result normal?
YES >> INSPECTION END
NO-1 [The actual gear position does not change, or sh ifting into the manual mode is not possible (no gear
shifting in the manual mode possible). Or the shift position indicator is not indicated.]>>Check manual
mode switch. Refer to TM-146, "
Component Inspection (Manual Mode Switch)".
Check A/T main system (Fai l-safe function actuated).
- Perform “Self Diagnostic Results” in “TRANSMISSION”. Refer to TM-78, "
DTC Index".
NO-2 (The actual gear position changes, but the shift pos ition indicator is not indicated.)>>Perform “Self
Diagnostic Results” in “TRANSMISSION”. Refer to TM-78, "
DTC Index".
NO-3 (The actual gear position and the indication on t he shift position indicator do not coincide.)>>Perform
“Self Diagnostic Results” in “TRANSMISSION”. Refer to TM-78, "
DTC Index".
NO-4 (Only a specific position or positions is/are not indicated on the shift position indicator.)>>Check the
combination meter. Refer to MWI-35, "
Reference Value".
Revision: 2010 May2011 QX56

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INFINITI QX56 2011 Factory Service Manual
SHIFT LOCK SYSTEMTM-157
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SHIFT LOCK SYSTEM
Component Function CheckINFOID:0000000006226882
1.CHECK A/T SHIFT LOCK OPERATION (PA

SHIFT LOCK SYSTEMTM-157
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SHIFT LOCK SYSTEM
Component Function CheckINFOID:0000000006226882
1.CHECK A/T SHIFT LOCK OPERATION (PART 1)
1. Turn ignition switch ON.
2. Shift the selector lever to “P” position.
3. Attempt to shift the selector lever to any other position with the brake pedal released.
Can the selector lever be shifted to any other position?
YES >> Go to TM-157, "Diagnosis Procedure".
NO >> GO TO 2.
2.CHECK A/T SHIFT LOCK OPERATION (PART 2)
Attempt to shift the selector lever to any other position with the brake pedal depressed.
Can the selector lever be shifted to any other position?
YES >> INSPECTION END
NO >> Go to TM-157, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006226883
1. CHECK POWER SOURCE
1. Turn ignition switch OFF.
2. Disconnect fuse block (J/B) connector.
3. Turn ignition switch ON.
4. Check voltage between fuse block (J/B) connector terminal and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Check the following. 10A fuse [No. 3, located in fuse block (J/B)]. Refer to PG-140, "
Fuse, Connector and Terminal
Arrangement".
Harness for short or open between ignition switch and fuse block (J/B). Refer to PG-89, "
Wiring
Diagram - IGNITION POWER SUPPLY -".
Ignition switch
2.CHECK HARNESS BETWEEN FUSE BLOCK (J/B ) AND STOP LAMP SWITCH (PART 1)
1. Turn ignition switch OFF.
2. Disconnect stop lamp switch connector.
3. Check continuity between fuse block (J/B) vehicl e side harness connector terminal and stop lamp switch
vehicle side harness connector terminal.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace damaged parts.
3.CHECK HARNESS BETWEEN FUSE BLOCK (J/B ) AND STOP LAMP SWITCH (PART 2)
Check continuity between stop lamp switch vehicle side harness connector terminal and ground.
Fuse block (J/B) connector
GroundVoltage (Approx.)
Connector Terminal
E103 4F Battery voltage
Fuse block (J/B) vehicle side harness connector Stop lamp switch vehicle side harness connector Continuity
Connector Terminal Connector Terminal
E103 4F E115 3 Existed
Revision: 2010 May2011 QX56

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INFINITI QX56 2011 Factory Service Manual
TM-158
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SHIFT LOCK SYSTEM
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace damaged parts.
4.CHECK STOP LAMP SWITCH (PART 1)
Check stop l

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INFINITI QX56 2011 Factory Service Manual
SHIFT LOCK SYSTEMTM-159
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Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-40, "Intermittent In

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INFINITI QX56 2011 Factory Service Manual
TM-160
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SHIFT LOCK SYSTEM
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace A/T shift selector assembly. Refer to
TM-176, "
Exploded View".

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