Nissan Leaf. Manual - part 1174

TM-102

< DTC/CIRCUIT DIAGNOSIS >

[ELECTRIC SHIFT]

P18A8 P POSITION SWITCH

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

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace damaged parts.

2.

CHECK P POSITION SWITCH

Check the P position switch. Refer to 

TM-102, "Component Inspection (P Position Switch)"

.

Is the inspection result normal?

YES

>> Replace the electric shift sensor. Refer to 

TM-121, "Exploded View"

.

NO

>> Replace the selector lever knob due to malfunction in the P position switch. Refer to 

TM-121,

"Removal and Installation"

.

Component Inspection (P Position Switch)

INFOID:0000000010119614

1.

CHECK P POSITION SWITCH

1. Disconnect the P position switch connector.

2. Check the continuity between P position swiitch connector terminal.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace the selector lever knob due to malfunction in the P position switch. Refer to 

TM-121,

"Removal and Installation"

.

VCM

Ground

Continuity

Connector

Terminal

E62

99

Ground

Not existed

112

P position switch connector

Condition

Continuity

Terminal

1

3

When P position switch is depressed

Not existed

When P position switch is released

Existed

2

3

When P position switch is depressed

Existed

When P position switch is released

Not existed

P18A9 PARKING ACTUATOR FUNCTION

TM-103

< DTC/CIRCUIT DIAGNOSIS >

[ELECTRIC SHIFT]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

P18A9 PARKING ACTUATOR FUNCTION

DTC Logic

INFOID:0000000010119615

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. Set the vehicle to READY.

2. Shift the selector lever to N position and wait for 10 seconds or more.

3. Press the P position switch to shift to P position and wait for 10 seconds or more.

4. Check DTC.
Is “P18A9” detected? 

YES

>> Go to 

TM-103, "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:0000000010119616

1.

REPLACE REDUCTION GEAR

Replace the reduction gear due to malfunction in the parking actuator. Refer to 

TM-21, "Removal and Installa-

tion"

.

>> END

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

Possible cause

P18A9

PARKING ACTUATOR FUNCTION
(Parking Actuator Function)

It is detected that the output of the parking 
actuator does not stop.

Parking actuator

TM-104

< DTC/CIRCUIT DIAGNOSIS >

[ELECTRIC SHIFT]

P18AB IGNITION SWITCH

P18AB IGNITION SWITCH

DTC Logic

INFOID:0000000010119617

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 ON and wait for 5 seconds or more.

2. Check DTC.
Is “P18AB” detected? 

YES

>> Go to 

TM-104, "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:0000000010119618

1.

CHECK VCM POWER SUPPLY CIRCUIT

1. Power switch OFF.

2. Disconnect the VCM connector.

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

Which terminal value is abnormal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

DETECT MALFUNCTION ITEMS

Check the following items.

• Harness for short or open between IPDM E/R vehicle side harness connector terminal 57 and VCM vehicle

side harness connector terminal 51.

• IPDM E/R

• 12V battery

• Ignition relay

• 10A fuse (#55, IPDM E/R) (Refer to 

PG-87, "How To Check"

.)

• Harness for short or open between power switch and VCM vehicle side harness connector terminal 74.

• Power switch

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

Possible cause

P18AB

IGNITION SWITCH
(IGN switch Circuit)

It is detected that the power switch input terminal 
values from the 2 lines do not match each other.

• Power switch
• Harness, fuse,  or connectors

(Each circuit is open or shorted.)

VCM

Ground

Condition

Voltage

(Approx.)

Connector

Terminal

E61

51

Ground

Power switch ON

9 – 16 V

Power switch OFF

0 V

E62

74

Power switch ON

9 – 16 V

Power switch OFF

0 V

P18AB IGNITION SWITCH

TM-105

< DTC/CIRCUIT DIAGNOSIS >

[ELECTRIC SHIFT]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

• 15A fuse (#6) (Refer to 

PG-87, "How To Check"

.)

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair or replace damaged parts.