2007 INFINITI QX56 Factory Service Manual

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Page 209 of 3061

INFINITI QX56 2007 Factory Service Manual DTC P1762 DIRECT CLUTCH SOLENOID VALVE
AT-139
< SERVICE INFORMATION >
D
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1. Turn ignition switch “ON”.
2. Select “MAIN SIGNALS” in “DATA MONITOR” mode for “

Page 210 of 3061

INFINITI QX56 2007 Factory Service Manual AT-140
< SERVICE INFORMATION >
DTC P1764 DIRECT CLUTCH SOLENOID VALVE FUNCTION
DTC P1764 DIRECT CLUTCH SOLENOID VALVE FUNCTION
DescriptionINFOID:0000000003532384
• Direct clutch solenoid valve is co

AT-140
< SERVICE INFORMATION >
DTC P1764 DIRECT CLUTCH SOLENOID VALVE FUNCTION
DTC P1764 DIRECT CLUTCH SOLENOID VALVE FUNCTION
DescriptionINFOID:0000000003532384
• Direct clutch solenoid valve is controlled by the TCM in response to signals sent from the PNP switch, vehi-
cle speed sensor and accelerator pedal position sensor (throttle position sensor). Gears will then be shifted
to the optimum position.
• This is not only caused by electrical malfunction (circuits open or shorted) but also by mechanical malfunc-
tion such as control valve sticking, improper solenoid valve operation.
CONSULT-II Reference Value in Data Monitor ModeINFOID:0000000003532385
On Board Diagnosis LogicINFOID:0000000003532386
• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1764 D/C SOLENOID FNCTN” with CONSULT-II is detected under the following
conditions.
- When TCM detects that actual gear ratio is irregular, and relation between gear position and condition of
ATF pressure switch 5 is irregular during depressing accelerator pedal. (Other than during shift change)
- When TCM detects that relation between gear position and condition of ATF pressure switch 5 is irregular
during releasing accelerator pedal. (Other than during shift change)
Possible CauseINFOID:0000000003532387
• Harness or connectors
(The solenoid and switch circuits are open or shorted.)
• Direct clutch solenoid valve
• ATF pressure switch 5
DTC Confirmation ProcedureINFOID:0000000003532388
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 procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1. Start engine.
2. Accelerate vehicle to maintain the following conditions.
ACCELE POS: 1.5/8 - 2.0/8
Selector lever: “D” position
Gear position: 1st ⇒ 2nd Gear (D/C ON/OFF)
Driving location: Driving the vehicle uphill (increased
engine load) will help maintain the driving conditions
required for this test.
3. Perform step “2” again.
4. Turn ignition switch “OFF”, then perform step “1” to “3” again.
5. Check “SELF-DIAG RESULTS” mode for “A/T” with CONSULT-
II. If DTC (P1764) is detected, refer to AT-141, "
Diagnosis Pro-
cedure".
If DTC (P1762) is detected, go to AT-138, "
Diagnosis Procedure".
If DTC (P1845) is detected, go to AT-154, "
Diagnosis Procedure".
WITH GST
Item name Condition Display value (Approx.)
D/C SOLENOIDDirect clutch disengaged. Refer to AT- 2 0
. 0.6 - 0.8 A
Direct clutch engaged. Refer to AT- 2 0
.0 - 0.05 A
ATF PRES SW 5Direct clutch engaged. Refer to AT- 2 0
.ON
Direct clutch disengaged. Refer to AT- 2 0
.OFF
BCIA0031E

Page 211 of 3061

INFINITI QX56 2007 Factory Service Manual DTC P1764 DIRECT CLUTCH SOLENOID VALVE FUNCTION
AT-141
< SERVICE INFORMATION >
D
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MA
B
AT
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Follow the procedure “With CONSULT-II”.
Diagnosis ProcedureINFOID:0000000003532389
1.

Page 212 of 3061

INFINITI QX56 2007 Factory Service Manual AT-142
< SERVICE INFORMATION >
DTC P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE
DTC P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE
DescriptionINFOID:0000000003532390
High and low reverse clutch

AT-142
< SERVICE INFORMATION >
DTC P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE
DTC P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE
DescriptionINFOID:0000000003532390
High and low reverse clutch solenoid valve is controlled by the TCM in response to signals sent from the PNP
switch, vehicle speed sensor and accelerator pedal position sensor (throttle position sensor). Gears will then
be shifted to the optimum position.
CONSULT-II Reference Value in Data Monitor ModeINFOID:0000000003532391
On Board Diagnosis LogicINFOID:0000000003532392
• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1767 HLR/C SOL/CIRC” with CONSULT-II or is detected under the following con-
ditions.
- 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:0000000003532393
• Harness or connectors
(The solenoid circuit is open or shorted.)
• High and low reverse clutch solenoid valve
DTC Confirmation ProcedureINFOID:0000000003532394
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 procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “DATA MONITOR” mode for “A/T” with CONSULT-II.
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: 2nd ⇒ 3rd Gear (HLR/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 AT-142, "
Diagnosis Procedure".
WITH GST
Follow the procedure “With CONSULT-II”.
Diagnosis ProcedureINFOID:0000000003532395
1.CHECK INPUT SIGNAL
With CONSULT-II
Item name Condition Display value (Approx.)
HLR/C SOLHigh and low reverse clutch disengaged. Refer to AT- 2 0
. 0.6 - 0.8 A
High and low reverse clutch engaged. Refer to AT- 2 0
.0 - 0.05 A
BCIA0031E

Page 213 of 3061

INFINITI QX56 2007 Factory Service Manual DTC P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE
AT-143
< SERVICE INFORMATION >
D
E
F
G
H
I
J
K
L
MA
B
AT
N
O
P
1. Turn ignition switch “ON”.
2. Select “MAIN SIGNALS” in “DATA MONITOR�

Page 214 of 3061

INFINITI QX56 2007 Factory Service Manual AT-144
< SERVICE INFORMATION >
DTC P1769 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE FUNCTION
DTC P1769 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE
FUNCTION
DescriptionINFOID:0000000003532396
• High a

AT-144
< SERVICE INFORMATION >
DTC P1769 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE FUNCTION
DTC P1769 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE
FUNCTION
DescriptionINFOID:0000000003532396
• High and low reverse clutch solenoid valve is controlled by the TCM in response to signals sent from the
PNP switch, vehicle speed sensor and accelerator pedal position sensor (throttle position sensor). Gears will
then be shifted to the optimum position.
• This is not only caused by electrical malfunction (circuits open or shorted) but also by mechanical malfunc-
tion such as control valve sticking, improper solenoid valve operation.
CONSULT-II Reference Value in Data Monitor ModeINFOID:0000000003532397
On Board Diagnosis LogicINFOID:0000000003532398
• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1769 HLR/C SOL FNCTN” with CONSULT-II is detected under the following con-
ditions.
- When TCM detects that actual gear ratio is irregular, and relation between gear position and condition of
ATF pressure switch 6 is irregular during depressing accelerator pedal. (Other than during shift change)
- When TCM detects that relation between gear position and condition of ATF pressure switch 6 is irregular
during releasing accelerator pedal. (Other than during shift change)
Possible CauseINFOID:0000000003532399
• Harness or connectors
(The solenoid and switch circuits are open or shorted.)
• High and low reverse clutch solenoid valve
• ATF pressure switch 6
DTC Confirmation ProcedureINFOID:0000000003532400
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 procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1. Start engine.
2. Accelerate vehicle to maintain the following conditions.
ACCELE POS: 1.5/8 - 2.0/8
Selector lever: “D” position
Gear position: 2nd ⇒ 3rd Gear (HLR/C ON/OFF)
Driving location: Driving the vehicle uphill (increased
engine load) will help maintain the driving conditions
required for this test.
3. Perform step “2” again.
4. Turn ignition switch “OFF”, then perform step “1” to “3” again.
5. Check “SELF-DIAG RESULTS” mode for “A/T” with CONSULT-
II. If DTC (P1769) is detected, refer to AT-145, "
Diagnosis Pro-
cedure".
Item name Condition Display value (Approx.)
HLR/C SOL High and low reverse clutch disengaged. Refer to AT- 2 0
. 0.6 - 0.8 A
High and low reverse clutch engaged. Refer to AT- 2 0
.0 - 0.05 A
ATF PRES SW 6High and low reverse clutch engaged. Refer to AT- 2 0
.ON
High and low reverse clutch disengaged. Refer to AT- 2 0
.OFF
BCIA0031E

Page 215 of 3061

INFINITI QX56 2007 Factory Service Manual DTC P1769 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE FUNCTION
AT-145
< SERVICE INFORMATION >
D
E
F
G
H
I
J
K
L
MA
B
AT
N
O
P
If DTC (P1767) is detected, go to AT-142, "Diagnosis Procedure".
If DTC (P1

Page 216 of 3061

INFINITI QX56 2007 Factory Service Manual AT-146
< SERVICE INFORMATION >
DTC P1772 LOW COAST BRAKE SOLENOID VALVE
DTC P1772 LOW COAST BRAKE SOLENOID VALVE
DescriptionINFOID:0000000003532402
Low coast brake solenoid valve is turned “ON” or

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