Infiniti M45 (Y34). Manual - part 91

DTC P1846 ATF PRESSURE SWITCH 6

AT-249

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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 DTC

Perform DTC confirmation procedure. Refer to  

AT-246, "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

>> Replace the control valve assembly. Refer to 

AT-312, "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 connector

F302

11 (Y)

SCIA3104E

AT-250

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

TION SWITCH CIRCUIT

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

PFP:31918

CONSULT-II Reference Value

ACS0064O

Item name

Condition 

Display value

PNP SW 1

When setting selector lever to “P” position.

OFF

When setting selector lever to “N” position.

ON

PNP SW 2

When setting selector lever to “P” position.

OFF

When setting selector lever to “D” position.

ON

PNP SW 3

When setting selector lever to “D” position.

OFF

When setting selector lever to “R” position.

ON

PNP SW 4

When setting selector lever to “P” position.

OFF

When setting selector lever to “R” position.

ON

SLCT LVR POSI

When setting selector lever to “N” or “P” posi-
tion.

N · P

When setting selector lever to “R” position.

R

When setting selector lever to “D” position.

D

MANU MODE SW

Manual shift gate position (neutral)

ON

Other than the above

OFF

NON M-MODE SW

Manual shift gate position

OFF

Other than the above

ON

UP SW LEVER

Select lever: + side

ON

Other than the above

OFF

DOWN SW LEVER

Select lever: - side

ON

Other than the above

OFF

BRAKE SW

Depressed brake pedal.

ON

Released brake pedal.

OFF

CLSO THL POS

Released accelerator pedal.

ON

Fully depressed accelerator pedal.

OFF

W/O THL POS

Fully depressed accelerator pedal.

ON

Released accelerator pedal.

OFF

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

TION SWITCH CIRCUIT

AT-251

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Diagnostic Procedure

ACS001FO

1. 

CHECK PNP SWITCH CIRCUIT

 With CONSULT-II

1.

Turn ignition switch ON. (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-110, "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 ON. (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.

Item name

Condition 

Display value (Approx.)

SLCT LVR POSI

When setting selector 
lever to “N” or “P” posi-
tion.

N · P

When setting selector 
lever to “R” position.

R

When setting selector 
lever to “D” position.

D

PCIA0034E

Item name

Condition 

Display value

MANU MODE SW

Manual shift gate posi-
tion (neutral)

ON

Other than the above

OFF

NON M-MODE SW

Manual shift gate position

OFF

Other than the above

ON

UP SW LEVER

Select lever: + side

ON

Other than the above

OFF

DOWN SW LEVER

Select lever: - side

ON

Other than the above

OFF

PCIA0064E

AT-252

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

TION SWITCH CIRCUIT

4. 

DETECT MALFUNCTIONING ITEM

Check the following items.

●

Manual mode switch. Refer to 

AT-230, "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.

5. 

CHECK BRAKE SWITCH CIRCUIT

 With CONSULT-II

1.

Turn ignition switch ON. (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-6, "COMBINATION METERS"

 .

6. 

CHECK THROTTLE POSITION SIGNAL CIRCUIT

 With CONSULT-II

1.

Turn ignition switch ON. (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-89, "CONSULT-II"

 .

●

CAN Communication Line. Refer to 

AT-103

 .

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 8.

Item name

Condition 

Display value

BRAKE SW

Depressed brake pedal.

ON

Released brake pedal.

OFF

PCIA0070E

Accelerator Pedal Operation

Monitor Item

CLSD THL POS

W/O THL POS

Released

ON

OFF

Fully depressed

OFF

ON

PCIA0070E