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Infiniti G35 (V35). Manual - part 37

DTC P1731 A/T 1ST ENGINE BRAKING

AT-139

Diagnostic Procedure

NCS000F3

CHECK INPUT SIGNALS

With CONSULT-II

Start the engine.

Select “SELECTION FROM MENU” in “DATA MONITOR” mode
for “A/T” with CONSULT-II.

Drive vehicle in the “M” position (1st gear), and confirm the ON/
OFF actuation of “ATF PRES SW 2” and “ON OFF SOL”.

OK or NG

>> GO TO 4.

>> GO TO 2.

CHECK TCM POWER SUPPLY AND GROUND CIRCUIT

Check TCM power supply and ground circuit. Refer to

AT-172, "MAIN POWER SUPPLY AND GROUND CIR-

CUIT"

OK or NG

>> GO TO 3.

>> Repair or replace damaged parts.

DETECT MALFUNCTIONING ITEM

Check A/T assembly harness connector pin terminals for damage or loose connection with harness connector.

OK or NG

>> Replace control valve with TCM. Refer to

AT-225, "Control Valve with TCM and A/T Fluid Temper-

ature Sensor 2"

>> Repair or replace damaged parts.

CHECK DTC

Perform

AT-138, "DTC Confirmation Procedure"

OK or NG

>> INSPECTION END

>> GO TO 2.

Item name

Condition

Display value

ON OFF SOL

Low coast brake engaged. Refer to

AT-19

Low coast brake disengaged. Refer to

AT-19

OFF

ATF PRES SW 2

Low coast brake engaged. Refer to

AT-19

Low coast brake disengaged. Refer to

AT-19

OFF

SCIA4670E

AT-140

DTC P1752 INPUT CLUTCH SOLENOID VALVE

PFP:31940

Description

NCS000F4

Input 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

NCS000F5

On Board Diagnosis Logic

NCS000F6

●

This is an OBD-II self-diagnostic item.

●

Diagnostic trouble code “P1752 I/C SOLENOID/CIRC” with CONSULT-II or 5th judgment without CON-
SULT-II 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 Cause

NCS000F7

●

Harness or connectors.
(Solenoid circuit is open or shorted.)

●

Input clutch solenoid valve.

DTC Confirmation Procedure

NCS000F8

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

Turn ignition switch ON.

Select “SELECTION FROM MENU” in “DATA MONITOR” mode
for “A/T” with CONSULT-II and check monitor “ACCELE POSI”,
“SLCT LVR POSI” and “GEAR”.

Touch “START”.

Start engine.

Drive vehicle and maintain the following conditions for at least 5
consecutive seconds.
ACCELE POSI: 1.5/8 - 2.0/8
SLCT LVR POSI: “D” position
GEAR: “3”

“4” (I/C ON/OFF)

Driving location: Driving the vehicle uphill (increased engine load) will help maintain the driving
conditions required for this test.

If DTC is detected, go to

AT-141, "Diagnostic Procedure"

WITH GST

Follow the procedure “WITH CONSULT-II”.

Item name

Condition

Display value (Approx.)

I/C SOLENOID

Input clutch disengaged. Refer to

AT-19

0.6 - 0.8 A

Input clutch engaged. Refer to

AT-19

0 - 0.05 A

BCIA0031E

DTC P1752 INPUT CLUTCH SOLENOID VALVE

AT-141

Diagnostic Procedure

NCS000F9

CHECK INPUT SIGNAL

With CONSULT-II

Turn ignition switch ON.

Select “MAIN SIGNALS” in “DATA MONITOR” mode for “A/T”
with CONSULT-II.

Start the engine.

Read out the value of “I/C SOLENOID” while driving.

OK or NG

>> GO TO 4.

>> GO TO 2.

CHECK TCM POWER SUPPLY AND GROUND CIRCUIT

Check TCM power supply and ground circuit. Refer to

AT-172, "MAIN POWER SUPPLY AND GROUND CIR-

CUIT"

OK or NG

>> GO TO 3.

>> Repair or replace damaged parts.

DETECT MALFUNCTIONING ITEM

Check A/T assembly harness connector pin terminals for damage or loose connection with harness connector.

OK or NG

>> Replace control valve with TCM. Refer to

AT-225, "Control Valve with TCM and A/T Fluid Temper-

ature Sensor 2"

>> Repair or replace damaged parts.

CHECK DTC

Perform

AT-140, "DTC Confirmation Procedure"

OK or NG

>> INSPECTION END

>> GO TO 2.

Item name

Condition

Display value (Approx.)

I/C SOLE-
NOID

Input clutch disengaged. Refer to

AT-19

0.6 - 0.8 A

Input clutch engaged. Refer to

AT-19

0 - 0.05 A

SCIA4793E

AT-142

DTC P1754 INPUT CLUTCH SOLENOID VALVE FUNCTION

PFP:31940

Description

NCS000FA

●

Input 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 mal-
function such as control valve sticking, improper solenoid valve operation.

CONSULT-II Reference Value

NCS000FB

On Board Diagnosis Logic

NCS000FC

●

This is an OBD-II self-diagnostic item.

●

Diagnostic trouble code “P1754 I/C SOLENOID FNCTN” with CONSULT-II or 5th judgment flicker without
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 3 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 3 is irregular
during releasing accelerator pedal. (Other than during shift change)

Possible Cause

NCS000FD

●

Harness or connectors.
(Solenoid and switch circuits are open or shorted.)

●

Input clutch solenoid valve.

●

ATF pressure switch 3.

DTC Confirmation Procedure

NCS000FE

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

Start the engine.

Accelerate vehicle to maintain the following conditions.
ACCELE POSI: 1.5/8 - 2.0/8
SLCT LVR POSI: “D” position
GEAR: “3”

“4” (I/C ON/OFF)

Driving location: Driving the vehicle uphill (increased
engine load) will help maintain the driving conditions
required for this test.

Perform step “2” again.

Turn ignition switch OFF, then perform step “1” to “3” again.

Check “SELF-DIAG RESULTS” mode for “A/T” with CONSULT-
II. If DTC (P1754) is detected, refer to

AT-143, "Diagnostic Procedure"

If DTC (P1752) is detected, go to

AT-141, "Diagnostic Procedure"

If DTC (P1843) is detected, go to