Nissan Leaf. Manual - part 1172

TM-94

< DTC/CIRCUIT DIAGNOSIS >

[ELECTRIC SHIFT]

P189D BACK UP VOLTAGE

NO

>> Repair or replace damaged parts.

3.

DETECT MALFUNCTIONING ITEM

Check the following.

• Harness for short or open between VCM vehicle side harness connector and 12V battery.

• 12V battery

• 20A fuse (#77) (Refer to 

PG-87, "How To Check"

.)

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair or replace damaged parts.

P18A3 CONTROL MODULE

TM-95

< DTC/CIRCUIT DIAGNOSIS >

[ELECTRIC SHIFT]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

P18A3 CONTROL MODULE

DTC Logic

INFOID:0000000010119606

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PREPARATION BEFORE WORK

If another "DTC CONFIRMATION PROCEDURE" occurs just before, power switch OFF and wait for at least

10 seconds, then perform the next test.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1. Power switch OFF to ON and wait for 2 seconds or more.

2. Check DTC.
Is “P18A3” detected?

YES

>> Go to 

TM-95, "Diagnosis Procedure"

.

NO-1 >> To check malfunction symptom before repair: Refer to 

GI-53, "Intermittent Incident"

.

NO-2 >> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010119607

1.

REPLACE VCM

Replace the VCM due to malfunction in the electric shift control module built in VCM. Refer to 

EVC-423,

"Removal and Installation"

.

>> END

DTC

CONSULT screen terms

[Trouble diagnosis content]

DTC detection condition

Possible cause

P18A3

CONTROL MODULE
[Control Module (Program Manipulation) 
Error]

A malfunction is detected in the elec-
tric shift control module.

Electric shift control module

TM-96

< DTC/CIRCUIT DIAGNOSIS >

[ELECTRIC SHIFT]

P18A4 CONTROL MODULE

P18A4 CONTROL MODULE

DTC Logic

INFOID:0000000010119608

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PREPARATION BEFORE WORK

If another "DTC CONFIRMATION PROCEDURE" occurs just before, power switch OFF and wait for at least

10 seconds, then perform the next test.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1. Power switch OFF to ON and wait for 2 seconds or more.

2. Check DTC.
Is “P18A4” detected? 

YES

>> Go to 

TM-96, "Diagnosis Procedure"

.

NO-1 >> To check malfunction symptom before repair: Refer to 

GI-53, "Intermittent Incident"

.

NO-2 >> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010119609

1.

REPLACE VCM

Replace the VCM due to malfunction in the electric shift control module built in VCM. Refer to 

EVC-423,

"Removal and Installation"

.

>> END

DTC

CONSULT screen terms

[Trouble diagnosis content]

DTC detection condition

Possible cause

P18A4

CONTROL MODULE
[Control Module (CPU) Error]

A malfunction is detected in the electric shift 
control module.

Electric shift control module

P18A7 SHIFT SIGNAL OFF

TM-97

< DTC/CIRCUIT DIAGNOSIS >

[ELECTRIC SHIFT]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

P18A7 SHIFT SIGNAL OFF

DTC Logic

INFOID:0000000010119610

DTC DETECTION LOGIC

Position Pattern Table

DTC CONFIRMATION PROCEDURE

1.

PREPARATION BEFORE WORK

If another "DTC CONFIRMATION PROCEDURE" occurs just before, power switch OFF and wait for at least

10 seconds, then perform the next test.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1. Set the vehicle to READY and wait for 5 seconds or more.

2. Check DTC.
Is “P18A7” detected? 

YES

>> Go to 

TM-97, "Diagnosis Procedure"

.

NO-1 >> To check malfunction symptom before repair: Refer to 

GI-53, "Intermittent Incident"

.

NO-2 >> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010119611

1.

CHECK ELECTRIC SHIFT SENSOR INPUT SIGNAL

With CONSULT

1. Set the vehicle to READY.

2. Select “Data Monitor” in “SHIFT”.

3. Select “SHIFT SENSOR 1”, “SHIFT SENSOR 2”, “SHIFT SENSOR 3”, “SHIFT SENSOR 4”, “SHIFT SEN-

SOR 5”, and “SHIFT SENSOR 6”.

4. Operate the selector lever to identify a electric shift sensor of which value does not change.

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

Possible cause

P18A7

SHIFT SIGNAL OFF
(Electric Shift Sensor Circuit)

It is detected that the states of all electric shift 
sensors No. 1 to No. 6 are OFF.

• Electric shift sensor
• Electric shift control module
• Harness or connectors

(Each circuit is open or shorted.)

Electric shift control module 

recognition position

Selector lever position

Electric shift sensor

No.  1

No.  2

No.  3

No.  4

No.  5

No.  6

H

H

OFF

OFF

ON

OFF

OFF

ON

P

H

OFF

OFF

ON

OFF

OFF

ON

R

R

ON

ON

OFF

OFF

OFF

OFF

N

N

OFF

ON

ON

ON

OFF

OFF

D

D

OFF

OFF

OFF

ON

ON

OFF

Monitor item

Condition

Value / Status

SHIFT SENSOR 1

Selector lever is held in R position

ON

Other than the above

OFF

SHIFT SENSOR 2

Selector lever is held in R and N positions

ON

Other than the above

OFF