Infiniti F50. Instruction - page 75

DTC P1759 FRONT BRAKE SOLENOID VALVE FUNCTION

AT-185

D

E

F

G

H

I

J

K

L

M

A

B

AT

Wiring Diagram — AT — FR/BF

ECS00876

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

TCWM0094E

Terminal

No.

Wire

color

Item

Condition

Data (Approx.)

19

R

Front brake
solenoid valve

When

vehicle
cruises

When the solenoid valve is operating (other than 4th gear)

More than 2V

When the solenoid valve is not operating (4th gear)

0V

35

B/Y

PSB2 (pres-
sure switch 1)

When front brake solenoid valve “OFF”.

Battery voltage

When front brake solenoid valve“ ON”.

0V

AT-186

DTC P1759 FRONT BRAKE SOLENOID VALVE FUNCTION

Diagnostic Procedure

ECS00877

1.

INPUT SIGNALS (WITH CONSULT-II)

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 the “D” position (3rd

Þ

4th gear), and con-

firm the ON/OFF actuation of the “ATF PRES SW 1”.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 3.

2.

INPUT SIGNALS (WITHOUT CONSULT-II)

Without CONSULT-II

1.

Start engine.

2.

Accelerate vehicle in the “D” position (3rd

Þ

4th gear).

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 3.

3.

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

1.

Turn ignition switch to “OFF” position.

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 4.

NG

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

in harness or connectors.

PCIA0067E

Solenoid valve

Connector

No.

Terminal No.

(Wire color)

Voltage

Front brake solenoid
valve

OFF

F104

35 (B/Y) - Ground

Battery voltage

ON

Approx. 0 V

PCIA0066E

Item

Connector No.

Terminal No.

(Wire color)

Continuity

TCM

F103

19 (R)

Yes

A/T unit assembly harness
connector

F27

5 (R)

TCM

F104

35 (B/Y)

Yes

A/T unit assembly harness
connector

F26

3 (B/Y)

SCIA3080E

DTC P1759 FRONT BRAKE SOLENOID VALVE FUNCTION

AT-187

D

E

F

G

H

I

J

K

L

M

A

B

AT

4.

CHECK TERMINAL CORD ASSEMBLY

1.

Remove oil pan. Refer to

AT-289, "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-289,

"Control Valve Assembly"

.

NG

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

in harness or connectors.

5.

CHECK DTC

Perform “DTC Confirmation Procedure”. Refer to

AT-184, "DTC Confirmation Procedure"

.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 6.

6.

PERFORM TCM INSPECTION

1.

Perform TCM input/output signal inspection.

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

3 (G)

Yes

Control valve assem-
bly harness connec-
tor

F302

12 (G)

A/T unit assembly
harness connector

F27

5 (W/R)

Yes

Control valve assem-
bly harness connec-
tor

F301

8 (W/R)

SCIA3081E

AT-188

DTC P1762 DIRECT CLUTCH SOLENOID VALVE

DTC P1762 DIRECT CLUTCH SOLENOID VALVE

PFP:31940

Description

ECS00878

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.

On Board Diagnosis Logic

ECS00879

This is an OBD-II self-diagnostic item.

Diagnostic trouble code “D/C SOLENOID/CIRC” with CONSULT-II or P1762 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

ECS0087A

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

Direct clutch solenoid valve

DTC Confirmation Procedure

ECS0087B

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 to “ON” position. (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: 1st

Þ

2nd Gear (D/C ON/OFF)

5.

If DTC is detected, go to

AT-190, "Diagnostic Procedure"

.

WITH GST

Follow the procedure “With CONSULT-II”.

SAT014K

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