Infiniti F50. Manual - part 87

DTC P1846 ATF PRESSURE SWITCH 6

AT-233

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Diagnostic Procedure

ECS00894

1. 

CHECK 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 (2nd 

Þ

 3rd gear), and con-

firm the ON/OFF actuation of the “ATF PRES SW 6”.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 3.

2. 

CHECK INPUT SIGNALS (WITHOUT CONSULT-II)

 Without CONSULT-II

1.

Start engine.

2.

Accelerate vehicle in the “D” position (2nd 

Þ

 3rd gear).

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 3.

3. 

CHECK POWER SOURCE CIRCUIT

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

High & low reverse 
clutch solenoid valve

OFF

F104

26 (G/Y) - Ground

Battery voltage

ON

Approx. 0 V

PCIA0068E

Item

Connector No.

Terminal No. 

(Wire color)

Continuity

TCM

F104

26 (G/Y)

Yes

A/T unit assembly harness 
connector

F26

4 (G/Y)

SCIA3103E

AT-234

DTC P1846 ATF PRESSURE SWITCH 6

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.

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-231, "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

>> Replace the control valve assembly. Refer to 

AT-289, "Control Valve Assembly"

 .

NG

>> Repair or replace damaged parts.

Item

Connector No.

Terminal No. (Wire color)

Continuity

A/T unit assembly 
harness connector

F26

4 (Y)

Yes

Control valve assem-
bly harness connec-
tor

F302

11 (Y)

SCIA3104E

PARK/NEUTRAL POSITION, MANUAL MODE, BRAKE AND THROTTLE POSI-

TION SWITCH CIRCUIT

AT-235

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PARK/NEUTRAL POSITION, MANUAL MODE, BRAKE AND THROTTLE POSI-
TION SWITCH CIRCUIT

PFP:31918

Diagnostic Procedure

ECS00895

1. 

CHECK PNP SWITCH CIRCUIT

 With CONSULT-II

1.

Turn ignition switch to “ON” position. (Do not start engine.)

2.

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

3.

Read out “N·P”, “R” and “D” position switches moving selector
lever to each position.

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 2.

2. 

DETECT MALFUNCTIONING ITEM

Check the following items.

●

Disconnection or short-circuit in the harness between TCM and PNP switch 1, 2, 3, 4.

●

Disconnection or short-circuit in the harness between the PNP switch 3 monitor and TCM.

●

PNP switch. Refer to 

AT-105, "DTC P0705 PARK/NEUTRAL POSITION SWITCH"

 .

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace damaged parts.

3. 

CHECK MANUAL MODE SWITCH CIRCUIT 

 With CONSULT-II

1.

Turn ignition switch to “ON” position. (Do not start engine.)

2.

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

3.

Read out ON/OFF switching action of the “MANU MODE SW”,
“NON M-MODE SW”, “UP SW LEVER”, “DOWN SW LEVER”.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

4. 

DETECT MALFUNCTIONING ITEM

Check the following items.

●

Manual mode switch. Refer to 

AT-215, "DTC P1815 MANUAL MODE SWITCH"

 .

●

Check the connector housing for missing, loosening, bending or falling down of any terminal.

OK or NG

OK

>> GO TO 5.

NG

>> Repair or replace damaged parts.

PCIA0034E

PCIA0064E

AT-236

PARK/NEUTRAL POSITION, MANUAL MODE, BRAKE AND THROTTLE POSI-

TION SWITCH CIRCUIT

5. 

CHECK BRAKE SWITCH CIRCUIT

 With CONSULT-II

1.

Turn ignition switch to “ON” position. (Do not start engine.)

2.

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

3.

Read out ON/OFF switching action of the “BRAKE SW”.

OK or NG

OK

>> GO TO 6.

NG

>> Check the following items.

●

Stop lamp switch. Refer to 

BR-6, "BRAKE PEDAL"

 .

●

Combination meter. Refer to 

DI-7, "COMBINATION

METERS"

 .

6. 

CHECK THROTTLE POSITION SIGNAL CIRCUIT

 With CONSULT-II

1.

Turn ignition switch to “ON” position. (Do not start engine.)

2.

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

3.

Depress accelerator pedal and read out the value of “CLSD THL
POS” and “W/O THL POS”.

4.

 Perform the self-diagnosis for “ENGINE” with CONSULT-II.

OK or NG

OK

>> GO TO 7.

NG

>> Repair or replace damaged parts.

7. 

CHECK DTC

Perform SELF-DIAGNOSTIC PROCEDURE. 

●

Refer to 

AT-86, "CONSULT-II"

 .

●

CAN Communication Line. Refer to 

AT-99

 .

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 8.

8. 

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.

PCIA0070E

Accelerator pedal operation

Monitor item

CLSD THL POS

W/O THL POS

Released

ON

OFF

Fully depressed

OFF

ON

PCIA0070E