Nissan Leaf. Manual - part 1175

TM-106

< DTC/CIRCUIT DIAGNOSIS >

[ELECTRIC SHIFT]

P18AC PARKING ACTUATOR RELAY A

P18AC PARKING ACTUATOR RELAY A

DTC Logic

INFOID:0000000010119619

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 2 seconds or more.

2. Check DTC.
Is “P18AC” detected? 

YES

>> Go to 

TM-106, "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:0000000010119620

1.

CHECK HARNESS BETWEEN VCM AND PARKING ACTUATOR RELAY A

1. Disconnect the VCM connector.

2. Disconnect the parking actuator relay A.

3. Check the continuity between parking actuator relay A vehicle side harness connector terminal and

ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace damaged parts.

2.

CHECK HARNESS BETWEEN PARKING ACTUATOR AND PARKING ACTUATOR RELAY A

1. Disconnect the parking actuator connector.

2. Check the voltage between parking actuator vehicle side harness connector terminal and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace damaged parts.

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

Possible cause

P18AC

PARKING ACTUATOR RELAY A
(Parking Actuator Relay A Circuit)

In spite of the parking actuator relay A OFF, 
voltage is detected from the U phase, V 
phase and W phase of motor coil A.

• Parking actuator relay A (ON 

stuck)

• Electric shift control module
• Harness (Ground short)

Parking actuator relay A

Ground

Continuity

Connector

Terminal

E54

2

Ground

Not existed

Parking actuator

Ground

Voltage

(Approx.)

Connector

Terminal

F4

2

Ground

0 V

P18AC PARKING ACTUATOR RELAY A

TM-107

< DTC/CIRCUIT DIAGNOSIS >

[ELECTRIC SHIFT]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

3.

CHECK HARNESS BETWEEN VCM AND PARKING ACTUATOR

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

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace damaged parts.

4.

CHECK PARKING ACTUATOR RELAY A

Check the parking actuator relay A. Refer to 

TM-107, "Component Inspection (Parking Actuator Relay A)"

.

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

>> Replace the parking actuator relay A. Refer to 

TM-32, "Component Parts Location"

.

Component Inspection (Parking Actuator Relay A)

INFOID:0000000010119621

1.

CHECK PARKING ACTUATOR RELAY A

1. Disconnect the parking actuator relay A. Refer to 

TM-32, "Component Parts Location"

.

2. Apply 12 V direct current between parking actuator relay A terminals 1 and 2.

CAUTION:

• Never make the terminals short.

• Connect the fuse between the terminals when applying the voltage.

3. Check the continuity between parking actuator relay A terminals 3 and 5.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace the parking actuator relay A.

VCM

Ground

Voltage

(Approx.)

Connector

Terminal

E61

1

Ground

0 V

13

39

Parking actuator relay A

Condition

Continuity

Terminal

3

5

Apply 12 V direct current between terminals 1 and 2.

Existed

Does not apply 12 V direct current between terminals 1 and 2.

Not existed

TM-108

< DTC/CIRCUIT DIAGNOSIS >

[ELECTRIC SHIFT]

P18AE STUCK IN SHIFT

P18AE STUCK IN SHIFT

DTC Logic

INFOID:0000000010119622

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION:

“

TM-108, "Diagnosis Procedure"

” must be performed before starting  "DTC CONFIRMATION PROCE-

DURE" .

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. Select “Data Monitor” in “SHIFT”.

3. Select “RANGE POSITION”.

4. Shift the selector lever as follows.

-

P 

→ N → P

5. Repeat step 4 five more times.

6. Check DTC.
Is “P18AE” detected? 

YES

>> Go to 

TM-108, "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:0000000010119623

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

P18AE

STUCK IN SHIFT
(Medium Stuck In Shift)

It is detected that the parking actuator does not move 
at the midpoint of the manual plate after the parking 
actuator stops the operation.

Parking actuator
(Parking mechanism)

P18AF CONTROL MODULE

TM-109

< DTC/CIRCUIT DIAGNOSIS >

[ELECTRIC SHIFT]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

P18AF CONTROL MODULE

DTC Logic

INFOID:0000000010119624

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 “P18AF” detected?

YES

>> Go to 

TM-109, "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:0000000010119625

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

P18AF

CONTROL MODULE
(Control Module)

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

Electric shift control module