Infiniti G37 Coupe. Manual - part 1326

P1815 MANUAL MODE SWITCH

TM-157

< COMPONENT DIAGNOSIS >

[5AT: RE5R05A]

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P1815 MANUAL MODE SWITCH

Description

INFOID:0000000001672201

Manual mode switch is installed in A/T device. It transmits manual mode switch, shift up and shift down switch
signals to unified meter and A/C amp. Then unified meter and A/C amp. transmits signals to TCM with CAN
communication.
Paddle shifter transmits shift up and shift down switch signals to unified meter and A/C amp. Then unified
meter and A/C amp. transmits signals to TCM with CAN communication. (With paddle shifter)
TCM transmits the switch signals to unified meter and A/C amp. by CAN communication line. Then manual
mode switch position is indicated on the A/T indicator. For inspection, refer to 

TM-165

.

DTC Logic

INFOID:0000000001672202

DTC DETECTION LOGIC

*1: With paddle shifter

DTC CONFIRMATION PROCEDURE

CAUTION:

Always drive vehicle at a safe speed.
NOTE:
If “DTC CONFIRMATION PROCEDURE” has been previously performed, always turn ignition switch
OFF. Then wait at least 10 seconds before performing the next test.

1.

CHECK DTC DETECTION

 With CONSULT-III

1.

Start the engine.

2.

Select “DATA MONITOR”.

3.

Drive vehicle and maintain the following conditions for at least 2 consecutive seconds.

Is “P1815 MANU MODE SW/CIRC” detected?

YES

>> Go to 

TM-157, "Diagnosis Procedure"

.

NO

>> Check intermittent incident. Refer to 

GI-38, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000001672203

1.

CHECK MANUAL MODE SWITCH CIRCUIT

 With CONSULT-III

1.

Turn ignition switch ON.

2.

Select “DATA MONITOR”.

3.

Check the On/Off operations of each monitor item.

DTC

Item

(CONSULT-III screen 

terms)

A/T CHECK indicator 
lamp judgment flicker

Diagnostic item is detect-

ed when...

Possible cause

P1815

MANU MODE SW/CIRC

—

• TCM monitors manual 

mode, non manual 
mode, up or down 
switch signal, and de-
tects as irregular when 
impossible input pat-
tern occurs 2 second 
or more.

• When shift up/down 

signal of paddle shifter 
continuously remains 
ON for 60 seconds. 
(With paddle shifter)

• Harness or connectors

(These switches circuit 
is open or shorted.)

• Manual mode select 

switch (Into control de-
vice)

• Manual mode position 

select switch (Into con-
trol device)

• Paddle shifter

*1

MANU MODE SW

: ON

TM-158

< COMPONENT DIAGNOSIS >

[5AT: RE5R05A]

P1815 MANUAL MODE SWITCH

*: With paddle shifter

 Without CONSULT-III

Drive the vehicle in the manual mode and shift the select lever and paddle shifter* to “UP (+ side)” or “DOWN
(

−

 side)” side (1st 

⇔

 5th gear). Check that the meter indicator coincides with the actual gear position.

*: With paddle shifter

Which item is abnormal?

Manual mode switch>>GO TO 2.
Paddle shifter>>GO TO 9.

2.

CHECK MANUAL MODE SWITCH CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect A/T device connector.

3.

Turn ignition switch ON.

4.

Check voltage between A/T device vehicle side harness connector terminals.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 5.

3.

CHECK MANUAL MODE SWITCH

Check manual mode switch. Refer to 

TM-161, "Component Inspection (Manual Mode Switch)"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace damaged parts.

4.

CHECK MALFUNCTIONING ITEM

Check the following.
• Check terminals of A/T device harness connector and harness cladding for damage.
• Check connector for loose connection.

Is the inspection result normal?

YES

>> GO TO 17.

Item

Monitor Item

Condition

Status

Manual mode switch

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

Selector lever: UP (+ side)

On

Other than the above

Off

DOWN SW LEVER

Selector lever: DOWN (

−

 side)

On

Other than the above

Off

Paddle shifter*

SFT UP ST SW

Paddle shifter: UP (+ side)

On

Other than the above

Off

SFT DWN ST SW

Paddle shifter: DOWN (

−

 side)

On

Other than the above

Off

A/T device vehicle side harness connector

Voltage (Approx.)

Connector

Terminal

M137

1

4

Battery voltage

2

3

5

P1815 MANUAL MODE SWITCH

TM-159

< COMPONENT DIAGNOSIS >

[5AT: RE5R05A]

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NO

>> Repair or replace damaged parts.

5.

CHECK GROUND CIRCUIT 

Check continuity between A/T device vehicle side harness connector terminal and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace damaged parts.

6.

CHECK POWER SOURCE CIRCUIT

Check voltage between A/T device vehicle side harness connector terminals and ground.

Is the inspection result normal?

YES

>> GO TO 16.

NO

>> GO TO 7.

7.

CHECK HARNESS BETWEEN A/T DEVICE AND UNIFIED METER AND A/C AMP. (STEP 1)

1.

Turn ignition switch OFF.

2.

Disconnect unified meter and A/C amp. connector.

3.

Check continuity between A/T device vehicle side harness connector terminals and unified meter and A/C
amp. vehicle side harness connector terminals.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Repair or replace damaged parts.

8.

CHECK HARNESS BETWEEN A/T DEVICE AND UNIFIED METER AND A/C AMP. (STEP 2)

Check continuity between A/T device vehicle side harness connector terminals and ground.

Is the inspection result normal?

A/T device vehicle side harness connector

Ground

Continuity

Connector

Terminal

M137

4

Existed

A/T device vehicle side harness connector

Ground

Voltage (Approx.)

Connector

Terminal

M137

1

Battery voltage

2

3

5

A/T device vehicle side harness connector

Unified meter and A/C amp. vehicle side harness 

connector

Continuity

Connector

Terminal

Connector

Terminal

M137

1

M66

10

Existed

2

25

3

5

5

11

A/T device vehicle side harness connector

Ground

Continuity

Connector

Terminal

M137

1

Not existed

2

3

5

TM-160

< COMPONENT DIAGNOSIS >

[5AT: RE5R05A]

P1815 MANUAL MODE SWITCH

YES

>> GO TO 16.

NO

>> Repair or replace damaged parts.

9.

CHECK PADDLE SHIFTER CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect paddle shifter connector.

3.

Turn ignition switch ON.

4.

Check voltage between paddle shifter vehicle side harness connector terminals.

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> GO TO 12.

10.

CHECK PADDLE SHIFTER

Check paddle shifter. Refer to 

TM-162, "Component Inspection (Paddle Shifter)"

.

Is the inspection result normal?

YES

>> GO TO 11.

NO

>> Repair or replace damaged parts.

11.

CHECK MALFUNCTIONING ITEM

Check the following.
• Check terminals of paddle shifter connector for damage.
• Check connector for loose connection.

Is the inspection result normal?

YES

>> GO TO 17.

NO

>> Repair or replace damaged parts.

12.

CHECK GROUND CIRCUIT 

Check continuity between paddle shifter vehicle side harness connector terminals and ground.

Is the inspection result normal?

YES

>> GO TO 13.

NO

>> Repair or replace damaged parts.

13.

CHECK POWER SOURCE CIRCUIT

Check voltage between paddle shifter vehicle side harness connector terminals and ground.

Is the inspection result normal?

YES

>> GO TO 16.

NO

>> GO TO 14.

14.

CHECK HARNESS BETWEEN PADDLE SHIFTER AND UNIFIED METER AND A/C AMP. (STEP 1)

1.

Turn ignition switch OFF.

Paddle shifter vehicle side harness connector

Voltage (Approx.)

Connector

Terminal

M32

3

1

Battery voltage

M39

3

1

Paddle shifter vehicle side harness connector

Ground

Continuity

Connector

Terminal

M32

1

Existed

M39

1

paddle shifter vehicle side harness connector

Ground

Voltage (Approx.)

Connector

Terminal

M32

3

Battery voltage

M39

3