2008 INFINITI QX56 Factory Service Manual

winter tyres turn signal battery capacity snow chains fold seats technical data

Page 3625 of 4083

INFINITI QX56 2008 Factory Service Manual TM-78
< COMPONENT DIAGNOSIS >
P1731 1ST ENGINE BRAKING
P1731 1ST ENGINE BRAKING
DescriptionINFOID:0000000001604118
Fail-safe function to prevent sudden decrease in speed by engine brake other than at

TM-78
< COMPONENT DIAGNOSIS >
P1731 1ST ENGINE BRAKING
P1731 1ST ENGINE BRAKING
DescriptionINFOID:0000000001604118
Fail-safe function to prevent sudden decrease in speed by engine brake other than at "1" position.
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000001604119
On Board Diagnosis LogicINFOID:0000000001604120
• This is not an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1731” with CONSULT-III is detected under the following conditions.
- When TCM does not receive the proper voltage signal from the sensor.
- When TCM monitors ATF pressure switch 2 and solenoid monitor value, and detects as irregular when engine brake of 1st gear acts other than at 1 position.
Possible CauseINFOID:0000000001604121
• Harness or connectors(The sensor circuit is open or shorted.)
• Low coast brake solenoid valve
• ATF pressure switch 2
DTC Confirmation ProcedureINFOID:0000000001604122
NOTE:
If “DTC Confirmation Procedure” has been previously preformed, always turn ignition switch “OFF”
and wait at least 10 seconds before performing the next test.
After the repair, perform the following proc edure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
3. Start engine.
4. Drive vehicle and maintain the following conditions for at least 2 consecutive seconds. ENGINE SPEED: 1,200 rpm
Selector lever: “1” position
Gear position: 1st gear
5. If DTC is detected, go to TM-78, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001604123
1.CHECK INPUT SIGNALS
With CONSULT-III
1. Start the engine.
2. Select “SELECTION FROM MENU” in “DATA MONITOR” for "TRANSMISSION" with CONSULT-III"
3. Drive vehicle in the “1” position (1st gear), and c onfirm the ON/OFF actuation of “ATF PRES SW 2” and
"ON OFF SOL".
Item name Condition Display value
ON OFF SOL Low coast brake engaged. Refer to
TM-9
.O N
Low coast brake disengaged. Refer to TM-9
.O FF
ATF PRES SW 2 Low coast brake engaged. Refer to
TM-9
ON
Low coast brake disengaged. Refer to TM-9
.O FF
Item name Condition Display value
ON OFF
SOL Low coast brake engaged. Refer to TM-9
.O
N
Low coast brake disengaged. Refer to TM-9
.OFF
Revision: March 2010 2008 QX56

Page 3626 of 4083

INFINITI QX56 2008 Factory Service Manual P1731 1ST ENGINE BRAKINGTM-79
< COMPONENT DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
OK or NG
OK >> GO TO 4.
NG >> GO TO 2.
2.CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and groun

Page 3627 of 4083

INFINITI QX56 2008 Factory Service Manual TM-80
< COMPONENT DIAGNOSIS >
P1752 INPUT CLUTCH SOLENOID
P1752 INPUT CLUTCH SOLENOID
DescriptionINFOID:0000000001604124
Input clutch solenoid valve is controlled by the TCM in response to signals sen

TM-80
< COMPONENT DIAGNOSIS >
P1752 INPUT CLUTCH SOLENOID
P1752 INPUT CLUTCH SOLENOID
DescriptionINFOID:0000000001604124
Input clutch solenoid valve is controlled by the TCM in response to signals sent from the transmission range
switch, output speed sensor and accelerator pedal position sensor (throttle position sensor). Gears will then
be shifted to the optimum position.
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000001604125
On Board Diagn osis LogicINFOID:0000000001604126
• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1752” with CONSULT-III is detected under the following conditions.
- When TCM detects an improper voltage drop when it tries to operate the solenoid valve.
- When TCM detects as irregular by comparing target value with monitor value.
Possible CauseINFOID:0000000001604127
• Harness or connectors (The solenoid circuit is open or shorted.)
• Input clutch solenoid valve
DTC Confirmation ProcedureINFOID:0000000001604128
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch “OFF”
and wait at least 10 seconds before performing the next test.
After the repair, perform the following proc edure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
3. Start engine.
4. Drive vehicle and maintain the following conditions for at least 5 consecutive seconds.
ACCELE POS: 1.5/8 - 2.0/8
Selector lever: “D” position
Gear position: 3rd ⇒ 4GR (I/C ON/OFF)
Driving location: Driving the vehicle uphill (increased engine load) will help maintain the driving
conditions required for this test.
5. If DTC is detected go to TM-80, "
Diagnosis Procedure".
WITH GST
Follow the procedure “With CONSULT-III”.
Diagnosis ProcedureINFOID:0000000001604129
1.CHECK INPUT SIGNAL
With CONSULT-III
1. Turn ignition switch “ON”.
2. Select “MAIN SIGNALS” in “DATA MONITOR” mode for “TRANMSMISSION” with CONSULT-III.
3. Start the engine.
4. Read out the value of “I/C SOLENOID” while driving.
Item name Condition Display value (Approx.)
I/C SOLENOID Input clutch disengaged. Refer to
TM-9
.0.6 - 0.8 A
Input clutch engaged. Refer to TM-9
.0 - 0 .0 5 A
Revision: March 2010 2008 QX56

Page 3628 of 4083

INFINITI QX56 2008 Factory Service Manual P1752 INPUT CLUTCH SOLENOIDTM-81
< COMPONENT DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
OK or NG
OK >> GO TO 4.
NG >> GO TO 2.
2.CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and gr

Page 3629 of 4083

INFINITI QX56 2008 Factory Service Manual TM-82
< COMPONENT DIAGNOSIS >
P1757 FRONT BRAKE SOLENOID
P1757 FRONT BRAKE SOLENOID
DescriptionINFOID:0000000001604130
Front brake solenoid valve is controlled by the TCM in response to signals sent f

TM-82
< COMPONENT DIAGNOSIS >
P1757 FRONT BRAKE SOLENOID
P1757 FRONT BRAKE SOLENOID
DescriptionINFOID:0000000001604130
Front brake solenoid valve is controlled by the TCM in response to signals sent from the transmission range
switch, output speed sensor and accelerator pedal position sensor (throttle position sensor). Gears will then
be shifted to the optimum position.
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000001604131
On Board Diagn osis LogicINFOID:0000000001604132
• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1757” with CONSULT-III is detected under the following conditions.
- When TCM detects an improper voltage drop when it tries to operate the solenoid valve.
- When TCM detects as irregular by comparing target value with monitor value.
Possible CauseINFOID:0000000001604133
• Harness or connectors (The solenoid circuit is open or shorted.)
• Front brake solenoid valve
DTC Confirmation ProcedureINFOID:0000000001604134
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch “OFF”
and wait at least 10 seconds before performing the next test.
After the repair, perform the following proc edure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
3. Start engine.
4. Drive vehicle and maintain the following conditions for at least 5 consecutive seconds.
ACCELE POS: 1.5/8 - 2.0/8
Selector lever: “D” position
Gear position: 3rd ⇒ 4GR (FR/B ON/OFF)
Driving location: Driving the vehicle uphill (increased engine load) will help maintain the driving
conditions required for this test.
5. If DTC is detected go to TM-82, "
Diagnosis Procedure".
WITH GST
Follow the procedure “With CONSULT-III”.
Diagnosis ProcedureINFOID:0000000001604135
1.CHECK INPUT SIGNAL
With CONSULT-III
1. Turn ignition switch “ON”.
2. Select “MAIN SIGNALS” in “DATA MONITO R” mode for “TRANSMISSION” with CONSULT-III.
3. Start engine.
4. Read out the value of “FR/B SOLENOID” while driving.
Item name Condition Display value (Approx.)
FR/B SOLENOID Front brake engaged. Refer to
TM-9
0.6 - 0.8 A
Front brake disengaged. Refer to TM-9
0 - 0.05 A
Revision: March 2010 2008 QX56

Page 3630 of 4083

INFINITI QX56 2008 Factory Service Manual P1757 FRONT BRAKE SOLENOIDTM-83
< COMPONENT DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
OK or NG
OK >> GO TO 4.
NG >> GO TO 2.
2.CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and gro

Page 3631 of 4083

INFINITI QX56 2008 Factory Service Manual TM-84
< COMPONENT DIAGNOSIS >
P1762 DIRECT CLUTCH SOLENOID
P1762 DIRECT CLUTCH SOLENOID
DescriptionINFOID:0000000001604136
Direct clutch solenoid valve is controlled by the TCM in response to signals

TM-84
< COMPONENT DIAGNOSIS >
P1762 DIRECT CLUTCH SOLENOID
P1762 DIRECT CLUTCH SOLENOID
DescriptionINFOID:0000000001604136
Direct clutch solenoid valve is controlled by the TCM in response to signals sent from the transmission range
switch, output speed sensor and accelerator pedal position sensor (throttle position sensor). Gears will then
be shifted to the optimum position.
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000001604137
On Board Diagn osis LogicINFOID:0000000001604138
• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1762” with CONSULT-III is detected under the following conditions.
- When TCM detects an improper voltage drop when it tries to operate the solenoid valve.
- When TCM detects as irregular by comparing target value with monitor value.
Possible CauseINFOID:0000000001604139
• Harness or connectors (The solenoid circuit is open or shorted.)
• Direct clutch solenoid valve
DTC Confirmation ProcedureINFOID:0000000001604140
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch “OFF”
and wait at least 10 seconds before performing the next test.
After the repair, perform the following proc edure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
3. Start engine.
4. Drive vehicle and maintain the following conditions for at least 5 consecutive seconds. ACCELE POS: 1.5/8 - 2.0/8
Selector lever: “D” position
Gear position: 1st ⇒ 2GR (D/C ON/OFF)
Driving location: Driving the vehicle uphill (increased engine load) will help maintain the driving
conditions required for this test.
5. If DTC is detected, go to TM-84, "
Diagnosis Procedure".
WITH GST
Follow the procedure “With CONSULT-III”.
Diagnosis ProcedureINFOID:0000000001604141
1.CHECK INPUT SIGNAL
With CONSULT-III
1. Turn ignition switch “ON”.
2. Select “MAIN SIGNALS” in “DATA MONITO R” mode for “TRANSMISSION” with CONSULT-III.
3. Start the engine.
4. Read out the value of “D/C SOLENOID” while driving.
Item name Condition Display value (Approx.)
D/C SOLENOID Direct clutch disengaged. Refer to
TM-9
0.6 - 0.8 A
Direct clutch engaged. Refer to TM-9
0 - 0.05 A
Revision: March 2010 2008 QX56

Page 3632 of 4083

INFINITI QX56 2008 Factory Service Manual P1762 DIRECT CLUTCH SOLENOIDTM-85
< COMPONENT DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
OK or NG
OK >> GO TO 4.
NG >> GO TO 2.
2.CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and g

Load next 8 pages

Page: < prev 1-10 ... 3593-3600 3601-3608 3609-3616 3617-3624 3625-3632 3633-3640 3641-3648 3649-3656 3657-3664 ... 4088 next >

emergency towing airbag cruise control service interval reset brake light refuelling