Infiniti M45 (Y34). Manual - part 80

 

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Infiniti M45 (Y34). Manual - part 80

 

 

DTC P1764 DIRECT CLUTCH SOLENOID VALVE FUNCTION

AT-205

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DTC P1764 DIRECT CLUTCH SOLENOID VALVE FUNCTION

PFP:31940

Description

ACS0049N

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

CONSULT-II Reference Value

ACS004PM

On Board Diagnosis Logic

ACS0049O

This is an OBD-II self-diagnostic item.

Diagnostic trouble code “D/C SOLENOID FNCTN” with CONSULT-II or P1764 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 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 Cause

ACS0049P

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

Direct clutch solenoid valve 

ATF pressure switch 5

DTC Confirmation Procedure

ACS0049Q

NOTE:
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting 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 condition.
ACCELE POS: 1.5/8 - 2.0/8
Selector lever: “D” position 
Gear position: 1st 

Þ

 2nd Gear (D/C ON/OFF) 

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-207, "Diagnostic Pro-

cedure"

 .

If DTC (P1762) is detected, go to 

AT-201, "Diagnostic Proce-

dure"

 .

If DTC (P1845) is detected, go to 

AT-244, "Diagnostic Procedure"

 .

 WITH GST

Follow the procedure “With CONSULT-II”.

Item name

Condition 

Display value

ATF PRES SW 5

Direct clutch solenoid valve operates. 

OFF

Other conditions

ON

SAT014K

AT-206

DTC P1764 DIRECT CLUTCH SOLENOID VALVE FUNCTION

Wiring Diagram — AT — D/CF

ACS0049R

TCWA0130E

DTC P1764 DIRECT CLUTCH SOLENOID VALVE FUNCTION

AT-207

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TCM terminal and data are reference value. Measured between each terminal and ground.

Diagnostic Procedure

ACS0049S

1. 

CHECK INPUT SIGNALS

 With CONSULT-II

1.

Start engine.

2.

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

3.

Accelerate vehicle in “D” position (1st 

Þ

 2nd gear), and confirm

the ON/OFF actuation of the “ATF PRES SW 5”.

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 2.

2. 

CHECK HARNESS BETWEEN TCM AND A/T UNIT ASSEMBLY HARNESS CONNECTOR

1.

Turn ignition switch OFF.

2.

Disconnect TCM connector.

3.

Check continuity between A/T unit assembly harness connector
and TCM connector.

4.

If OK, check harness for short to ground and short to power.

5.

Reinstall any part removed.

OK or NG

OK

>> GO TO 3.

NG

>> Repair open circuit or short to ground or short to power

in harness or connectors.

Terminal   

No.

Wire 

color

Item

Condition

Data (Approx.)

21

G

Direct clutch sole-
noid valve

When 

vehicle 
cruises

When the solenoid valve is operating (1st gear or 5th gear)

More than 2.0V

When the solenoid valve is not operating (2nd gear, 3rd 
gear or 4th gear)

0V

22

P/B

SEL2 (ATF pressure 
switch 5)

40

Y/G

DATA BIT1

Item name

Condition 

Display value

ATF PRES SW 5

Direct clutch solenoid 
valve operates. 

OFF

Other conditions

ON

PCIA0067E

Item

Connector No.

Terminal No. 

(Wire color)

Continuity

TCM

F103

22 (P/B)

Yes

A/T unit assembly harness 
connector

F26

6 (P/B)

TCM

F104

40 (Y/G)

Yes

A/T unit assembly harness 
connector

F26

2 (Y/G)

TCM

F103

21 (G)

Yes

A/T unit assembly harness 
connector

F27

4 (G)

SCIA3086E

AT-208

DTC P1764 DIRECT CLUTCH SOLENOID VALVE FUNCTION

3. 

CHECK TERMINAL CORD ASSEMBLY

1.

Remove oil pan. Refer to 

AT-312, "Control Valve Assembly"

 .

2.

Disconnect A/T unit assembly harness connector and control valve assembly harness connector.

3.

Check continuity between A/T unit assembly harness connector
and control valve assembly harness connector.

4.

If OK, check harness for short to ground and short to power.

5.

Reinstall any part removed.

OK or NG

OK

>> Replace the control valve assembly. Refer to 

AT-312, "Control Valve Assembly"

 .

NG

>> Repair open circuit or short to ground or short to power in harness or connectors.

4. 

CHECK DTC

Perform “DTC Confirmation Procedure”. Refer to 

AT-205, "DTC Confirmation Procedure"

 .

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 5.

5. 

CHECK TCM

1.

Check TCM input/output signal. Refer to 

AT-86, "TCM Input/Output Signal Reference Values"

 .

2.

If NG, recheck TCM pin terminals for damage or loose connection with harness connector.

OK or NG

OK

>> INSPECTION END

NG

>> Repair or replace damaged parts.

Item

Connector No.

Terminal No. (Wire color)

Continuity

A/T unit assembly 
harness connector

F26

2 (R)

Yes

Control valve assem-
bly harness connec-
tor

F302

10 (R)

A/T unit assembly 
harness connector

F26

6 (GY)

Yes

Control valve assem-
bly harness connec-
tor

F302

14 (GY)

A/T unit assembly 
harness connector

F27

4 (W/B)

Yes

Control valve assem-
bly harness connec-
tor

F301

7 (W/B)

SCIA3085E

 

 

 

 

 

 

 

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