Nissan Leaf. Instruction — part 1173

TM-98

< DTC/CIRCUIT DIAGNOSIS >

[ELECTRIC SHIFT]

P18A7 SHIFT SIGNAL OFF

Without CONSULT

1. Set the vehicle to READY.

2. Operate the selector lever.

3. Check the voltage between VCM vehicle side harness connector terminal and ground.

>> GO TO 2.

2.

CHECK ELECTRIC SHIFT SENSOR POWER SUPPLY CIRCUIT

1. Power switch OFF.

2. Disconnect the electric shift sensor connector.

3. Power switch ON.

4. Check the power circuit of the malfunctioning electric shift sensor identified at Step 1.

5. Check the voltage between electric shift sensor vehicle side harness connector terminal and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

CHECK HARNESS BETWEEN VCM AND ELECTRIC SHIFT SENSOR

1. Power switch OFF.

2. Disconnect the VCM connector.

SHIFT SENSOR 3

Selector lever is held in H (Home) and N positions

ON

Other than the above

OFF

SHIFT SENSOR 4

Selector lever is held in N and D positions

ON

Other than the above

OFF

SHIFT SENSOR 5

Selector lever is held in D position

ON

Other than the above

OFF

SHIFT SENSOR 6

Selector lever in H (Home) position

ON

Other than the above

OFF

Monitor item

Condition

Value / Status

Electric

shift sen-

sor

VCM

Ground

Condition

Voltage

(Approx.)

Connector

terminal

1

E61

17

Ground

Selector lever is held in R position

0 V

Other than the above

5 V

3

16

Selector lever is held in H (Home) and N posi-
tions

0 V

Other than the above

5 V

5

3

Selector lever is held in D position

0 V

Other than the above

5 V

2

E62

84

Selector lever is held in R and N positions

0 V

Other than the above

5 V

4

85

Selector lever is held in N and D position

0 V

Other than the above

5 V

6

86

Selector lever in H (Home) position

0 V

Other than the above

5 V

Electric shift sensor

Electric shift sensor

Ground

Voltage

(Approx.)

Connector

Terminal

1, 3, 5

M57

1

Ground

5 V

2, 4, 6

7

P18A7 SHIFT SIGNAL OFF

TM-99

< DTC/CIRCUIT DIAGNOSIS >

[ELECTRIC SHIFT]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

3. Check the continuity between VCM vehicle side harness connector terminal and electric shift sensor vehi-

cle side harness connector terminal.

4. Check the continuity between VCM vehicle side harness connector terminal and ground.

Is the inspection result normal?

YES

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

EVC-423, "Removal and Installation"

.

NO

>> Repair or replace damaged parts.

4.

CHECK ELECTRIC SHIFT SENSOR GROUND CIRCUIT

1. Power switch OFF.

2. Disconnect the VCM connector.

3. Check the continuity between VCM vehicle side harness connector terminal and electric shift sensor vehi-

cle side harness connector terminal.

4. Check the continuity between VCM vehicle side harness connector terminal and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace damaged parts.

5.

CHECK HARNESS BETWEEN VCM AND ELECTRIC SHIFT SENSOR

1. Check the continuity between VCM vehicle side harness connector terminal and electric shift sensor vehi-

cle side harness connector terminal.

2. Check the continuity between VCM vehicle side harness connector terminals and ground.

Electric shift sensor

VCM

Electric shift sensor

Continuity

Connector

Terminal

Connector

Terminal

1, 3, 5

E61

7

M57

1

Existed

2, 4, 6

E62

83

7

Electric shift sensor

VCM

Ground

Continuity

Connector

Terminal

1, 3, 5

E61

7

Ground

Not existed

2, 4, 6

E62

83

Electric shift sensor

VCM

Electric shift sensor

Continuity

Connector

Terminal

Connector

Terminal

1, 3, 5

E61

57

M57

6

Existed

2, 4, 6

E62

124

12

Electric shift sensor

VCM

Ground

Continuity

Connector

Terminal

1, 3, 5

E61

57

Ground

Not existed

2, 4, 6

E62

124

Electric shift sensor

VCM

Electric shift sensor

Continuity

Connector

terminal

Connector

terminal

1

E61

17

M57

11

Existed

3

16

10

5

3

9

2

E62

84

5

4

85

3

6

86

4

TM-100

< DTC/CIRCUIT DIAGNOSIS >

[ELECTRIC SHIFT]

P18A7 SHIFT SIGNAL OFF

Is the inspection result normal?

YES

>> Replace the electric shift sensor. Refer to

TM-122, "Disassembly and Assembly"

.

NO

>> Repair or replace damaged parts.

Electric shift sensor

VCM

Ground

Continuity

Connector

terminal

1

E61

17

Ground

Not existed

3

16

5

3

2

E62

84

4

85

6

86

P18A8 P POSITION SWITCH

TM-101

< DTC/CIRCUIT DIAGNOSIS >

[ELECTRIC SHIFT]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

P18A8 P POSITION SWITCH

DTC Logic

INFOID:0000000010119612

DTC DETECTION LOGIC

P Position Switch 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.

2. Press the P position switch to shift to P position and wait for 5 seconds or more. (Be sure to press the P

position switch for 1 second or more.)

3. Shift the selector lever to N position and wait for 5 minutes or more.

4. Check DTC.
Is “P18A8” detected?

YES

>> Go to

TM-101, "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:0000000010119613

1.

CHECK HARNESS BETWEEN VCM AND ELECTRIC SHIFT SENSOR

1. Power switch OFF.

2. Disconnect the VCM connector.

3. Disconnect the electric shift sensor connector.

4. Check the continuity between VCM vehicle side harness connector terminals and electric shift sensor

vehicle side harness connector terminals.

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

Possible cause

P18A8

P POSITION SWITCH
(P Position Switch Error)

P position switches No. 1 and No. 2 are
stuck at OFF.

• P position switch
• Harness

(Each circuit is open or shorted.)

P position switch No. 1 is stuck at ON and
P position switch No. 2 is stuck at OFF.

Electric shift control

module recognition

position

Selector lever

position

P position

SW

Electric shift sensor

P position SW

No. 1

No. 2

No. 3

No. 4

No. 5

No. 6

No. 1

No. 2

H

H

No push

OFF

OFF

ON

OFF

OFF

ON

OFF

ON

P

H

Push

OFF

OFF

ON

OFF

OFF

ON

ON

OFF

R

R

No push

ON

ON

OFF

OFF

OFF

OFF

OFF

ON

N

N

No push

OFF

ON

ON

ON

OFF

OFF

OFF

ON

D

D

No push

OFF

OFF

OFF

ON

ON

OFF

OFF

ON

VCM

Electric shift sensor

Continuity

Connector

Terminal

Connector

Terminal

E62

99

M57

2

Existed

112

8