Infiniti M45 (Y34). Manual — part 81

DTC P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE

AT-209

D

E

F

G

H

I

J

K

L

M

A

B

AT

DTC P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE

PFP:31940

Description

ACS0049T

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

ACS004PN

On Board Diagnosis Logic

ACS0049U

●

This is an OBD-II self-diagnostic item.

●

Diagnostic trouble code “HLR/C SOL/CIRC” with CONSULT-II or P1767 without CONSULT-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

ACS0049V

●

Harness or connectors
(The solenoid circuit is open or shorted.)

●

High and low reverse clutch solenoid valve

DTC Confirmation Procedure

ACS0049W

CAUTION:

Always drive vehicle at a safe speed.

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.

Turn ignition switch ON. (Do not start engine.)

2.

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

3.

Start engine.

4.

Maintain the following conditions for at least 5 consecutive sec-
onds.
ACCELE POS: 1.5/8 - 2.0/8
Selector lever: “D” position
Gear position: 2nd

Þ

3rd Gear (HLR/C ON/OFF)

5.

If DTC is detected, go to

AT-211, "Diagnostic Procedure"

.

WITH GST

Follow the procedure “With CONSULT-II”.

Item name

Condition

Display value (Approx.)

HLR/C SOL

High and low reverse clutch solenoid valve
operates.

0.6 - 0.8 A

Other conditions

0 - 0.05 A

SAT014K

AT-210

DTC P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE

Wiring Diagram — AT — HLR/C

ACS0049X

TCWA0131E

DTC P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE

AT-211

D

E

F

G

H

I

J

K

L

M

A

B

AT

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

Diagnostic Procedure

ACS0049Y

1.

CHECK INPUT SIGNALS

With CONSULT-II

1.

Start engine.

2.

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

3.

Read out the value of “HLR/C SOL” while driving.

Without CONSULT-II

1.

Start engine.

2.

Check voltage between TCM connector and ground.

OK or NG

OK >> GO

TO

6.

NG

>> GO TO 2.

Terminal

No.

Wire

color

Item

Condition

Data (Approx.)

11

R/L

High and low
reverse clutch
solenoid valve

When

vehicle
cruises

When the solenoid valve operating [6 km/h (4 MPH) or
faster in 1st gear or 2nd gear]

More than 2.0V

When the solenoid valve is not operating [6 km/h (4 MPH)
or slower in 1st gear or 3rd, 4th, or 5th gear]

0V

Item name

Condition

Display value (Approx.)

HLR/C SOL

High and low reverse
clutch solenoid valve
operates.

0.6 - 0.8 A

Other conditions

0 - 0.05 A

SCIA4575E

Item

Con-

nector

No.

Terminal

No.

Condition

Data

(Approx.)

High and

low

reverse

clutch

solenoid

valve

F103

11 (R/L)

- Ground

When
vehicle
cruises

When the solenoid

valve operating [6 km/h
(4 MPH) or faster in 1st

gear or 2nd gear]

More than

2.0V

When the solenoid

valve is not operating

[6 km/h (4 MPH) or

slower in 1st gear or
3rd, 4th, or 5th gear]

0V

SCIA4577E

AT-212

DTC P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE

2.

CHECK HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect A/T unit assembly harness connector at the trans-
mission right side.

3.

Check the resistance between terminal and ground.

OK or NG

OK >> GO

TO

5.

NG

>> GO TO 3.

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.

OK or NG

OK

>> GO TO 4.

NG

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

4.

CHECK VALVE RESISTANCE

Check valve resistance

●

Refer to

AT-213, "Component Inspection"

.

OK or NG

OK >> GO

TO

6.

NG

>> Replace the control valve assembly. Refer to

AT-312, "Control Valve Assembly"

.

Solenoid valve

Connector

No.

Terminal No.

Resistance (Approx.)

High and low reverse
clutch solenoid valve

F27

3 - Ground

3 - 9

Ω

SCIA1843E

Item

Connector No.

Terminal No. (Wire color)

Continuity

A/T unit assembly
harness connector

F27

3 (B/W)

Yes

Control valve assem-
bly harness connector

F301

5 (B/W)

SCIA3087E