Infiniti F50. Manual - part 82

 

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Infiniti F50. Manual - part 82

 

 

DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTION

AT-213

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Diagnostic Procedure

ECS00887

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 the manual mode (“M1-1st” or “M2-2nd”
gear), and confirm the ON/OFF actuation of the “ATF PRES SW
2”.

 With GST

Follow the procedure “With CONSULT-II”.
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 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 3.

NG

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

in harness or connectors.

PCIA0067E

Item

Connector No.

Terminal No. 

(Wire color)

Continuity

TCM

F103

13 (W/L)

Yes

A/T unit assembly harness 
connector

F27

2 (W/L)

TCM

F103

16 (W/G)

Yes

A/T unit assembly harness 
connector

F26

5 (W/G)

TCM

F104

40 (Y/G)

Yes

A/T unit assembly harness 
connector

F26

2 (Y/G)

SCIA3095E

AT-214

DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTION

3. 

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.

4. 

CHECK DTC

Perform “DTC Confirmation Procedure”. Refer to 

AT-211, "DTC Confirmation Procedure"

 .

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 5.

5. 

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

2 (R)

Yes

Control valve assem-
bly harness connec-
tor

F302

10 (R)

A/T unit assembly 
harness connector

F26

5 (L)

Yes

Control valve assem-
bly harness connec-
tor

F302

13 (L)

A/T unit assembly 
harness connector

F27

2 (B/R)

Yes

Control valve assem-
bly harness connec-
tor

F301

4 (B/R)

SCIA3096E

DTC P1815 MANUAL MODE SWITCH

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DTC P1815 MANUAL MODE SWITCH

PFP:34901

Description

ECS00888

When an impossible pattern of switch signals is detected, this is judged to be an irregularity.

CONSULT-II Reference Value in Data Monitor Mode

ECS00889

On Board Diagnosis Logic

ECS0088A

This is not an OBD-II self-diagnostic item. 

Diagnostic trouble code “MANU MODE SW/CIR” with CONSULT-II is detected when TCM monitors Man-
ual mode, Non manual mode, Up or Down switch signal, and detects as irregular when impossible input
pattern occurs 1 second or more.

Possible Cause

ECS0088B

Harness or connectors
(These switches circuit is open or shorted.)

Mode select switch (Into control device)

Position select switch (Into control device)

DTC Confirmation Procedure

ECS0088C

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.

Move selector lever to “M” position for at least 2 consecutive
seconds.

5.

If DTC is detected, go to 

AT-217, "Diagnostic Procedure"

 .

Monitor Item

Condition

Reference Value

MANU MODE SW

[ON - OFF]

Manual shift gate position (neutral)

ON

Other than the above

OFF

NON M-MODE SW

[ON - OFF]

Manual shift gate position

OFF

Other than the above

ON

UP SW LEVER

[ON - OFF]

Select lever: + side

ON

Other than the above

OFF

DOWN SW LEVER

[ON - OFF]

Select lever: - side

ON

Other than the above

OFF

SAT014K

AT-216

DTC P1815 MANUAL MODE SWITCH

Wiring Diagram — AT — MMSW

ECS0088D

TCWM0102E

 

 

 

 

 

 

 

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