Nissan Leaf. Manual - part 1171

TM-90

< DTC/CIRCUIT DIAGNOSIS >

[ELECTRIC SHIFT]

P189A MOTOR A

P189A MOTOR A

DTC Logic

INFOID:0000000010119600

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PREPARATION BEFORE WORK

If another "DTC CONFIRMATION PROCEDURE" occurs just before, key 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 “P189A” detected? 

YES

>> Go to 

TM-90, "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:0000000010119601

1.

CHECK HARNESS BETWEEN VCM AND MOTOR COIL A

1. Power switch OFF.

2. Disconnect the VCM connector.

3. Disconnect the parking actuator connector.

4. Check the continuity VCM vehicle side harness connector terminals and parking actuator vehicle side har-

ness connector terminals.

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

Is the inspection result normal?

YES

>> GO TO 2.

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

Possible cause

P189A

MOTOR A
(Motor “A” Circuit Low)

When the power switch is ON, one of the phases 
is in the energized state even though motor coil A 
all phases are not energized.
NOTE:
Energized: Approx. 0 V, Non-energized: 9 – 16 V

• Parking actuator relay A (OFF stuck)
• Motor coil A (Parking actuator)
• Electric shift control module
• Harness or connectors

(Each circuit is open or ground short-
ed.)

VCM

Parking actuator

Continuity

Connector

Terminal

Connector

Terminal

E61

1

F4

1

Existed

13

6

39

7

VCM

Ground

Continuity

Connector

Terminal

E61

1

Ground

Not existed

13

39

P189A MOTOR A

TM-91

< DTC/CIRCUIT DIAGNOSIS >

[ELECTRIC SHIFT]

C

E

F

G

H

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A

B

TM

N

O

P

NO

>> Repair or replace damaged parts.

2.

CHECK PARKING ACTUATOR RELAY A

Check the parking actuator relay A. Refer to 

TM-92, "Component Inspection (Parking Actuator Relay A)"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace the parking actuator relay A. Refer to 

TM-32, "Component Parts Location"

.

3.

CHECK HARNESS BETWEEN PARKING ACTUATOR RELAY A AND 12V BATTERY

Check the voltage parking actuator relay A vehicle side harness connector terminal and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 4.

4.

DETECT MALFUNCTIONING ITEM

Check the following.

• Harness for short or open between parking actuator relay A and 12V battery

• 12V battery

• 40A fuse (#O) (Refer to 

PG-87, "How To Check"

.)

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair or replace damaged parts.

5.

CHECK HARNESS BETWEEN PARKING ACTUATOR AND PARKING ACTUATOR RELAY A

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

vehicle side harness connector terminal.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace damaged parts.

6.

CHECK HARNESS BETWEEN VCM AND PARKING ACTUATOR RELAY A

1. Check the continuity VCM vehicle side harness connector terminal and parking actuator relay A vehicle

side harness connector terminal.

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

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Repair or replace damaged parts.

Parking actuator relay A

Ground

Voltage

Connector

Terminal

E54

1

Ground

9 – 16 V

3

Parking actuator

Parking actuator relay A

Continuity

Connector

Terminal

Connector

Terminal

F4

2

E54

5

Existed

VCM

Parking actuator relay A

Continuity

Connector

Terminal

Connector

Terminal

E61

9

E54

2

Existed

VCM

Ground

Continuity

Connector

Terminal

E61

9

Ground

Not existed

TM-92

< DTC/CIRCUIT DIAGNOSIS >

[ELECTRIC SHIFT]

P189A MOTOR A

7.

CHECK MOTOR COIL A

Check the motor coil A (parking actuator). Refer to 

TM-92, "Component Inspection (Motor Coil A)"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace the reduction gear due to malfunction in the motor coil A (parking actuator). Refer to 

TM-

21, "Removal and Installation"

.

Component Inspection (Parking Actuator Relay A)

INFOID:0000000010119602

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.

Component Inspection (Motor Coil A)

INFOID:0000000010119603

1.

CHECK MOTOR COIL A

1. Disconnect the parking actuator connector.

2. Check the resistance between parking actuator connector terminals.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace the reduction gear due to malfunction in the motor coil A (parking actuator). Refer to 

TM-

21, "Removal and Installation"

.

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

Parking actuator connector

Resistance

Terminal

2

1

2.3 – 2.8 

Ω

6

7

P189D BACK UP VOLTAGE

TM-93

< DTC/CIRCUIT DIAGNOSIS >

[ELECTRIC SHIFT]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

P189D BACK UP VOLTAGE

DTC Logic

INFOID:0000000010119604

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 “P189D” detected? 

YES

>> Go to 

TM-93, "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:0000000010119605

1.

CHECK MEMORY BACK UP POWER SUPPLY CIRCUIT

1. Power switch OFF.

2. Disconnect the VCM connector.

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

Is the inspection result normal?

YES 

>> GO TO 2.

NO

>> GO TO 3.

2.

CHECK GROUND CIRCUIT

Check the continuity between VCM vehicle side harness connector terminals 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"

.

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

Possible cause

P189D

BACK UP VOLTAGE
(Memory Back Up Power 
Supply)

It is detected that the memory backup power 
supply voltage is specified value or less.

• Electric shift control module
• Harness, fuse,  or connectors

(Each circuit is open or shorted.)

VCM

Ground

Voltage

(Approx.)

Connector

Terminal

E62

79

Ground

9 – 16 V

VCM

Ground

Continuity

Connector

Terminal

E61

58

Ground

Existed

65

E62

118

126