Nissan Leaf. Manual - part 1168

TM-78

< DTC/CIRCUIT DIAGNOSIS >

[ELECTRIC SHIFT]

P1803 CONTROL MODULE

P1803 CONTROL MODULE

DTC Logic

INFOID:0000000010119585

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 “P1803” detected? 

YES

>> Go to 

TM-78, "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:0000000010119586

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

P1803

CONTROL MODULE
[Control Module (ROM)]

A malfunction is detected in the electric shift 
control module.

Electric shift control module

P1804 CONTROL MODULE

TM-79

< DTC/CIRCUIT DIAGNOSIS >

[ELECTRIC SHIFT]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

P1804 CONTROL MODULE

DTC Logic

INFOID:0000000010119587

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 “P1804” detected? 

YES

>> Go to 

TM-79, "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:0000000010119588

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

P1804

CONTROL MODULE
[Control Module (EEPROM)]

A malfunction is detected in the electric shift 
control module.

Electric shift control module

TM-80

< DTC/CIRCUIT DIAGNOSIS >

[ELECTRIC SHIFT]

P1811 ELECTRIC SHIFT POWER SUPPLY RELAY

P1811 ELECTRIC SHIFT POWER SUPPLY RELAY

DTC Logic

INFOID:0000000010119589

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. Power switch OFF and wait for 60 seconds or more.

3. Power switch ON and wait for 2 seconds or more.

4. Check DTC.
Is “P1811” detected? 

YES

>> Go to 

TM-80, "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:0000000010119590

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

P1811

ELECTRIC SHIFT POWER SUPPLY RE-
LAY
(Electric Shift Power Supply Relay Circuit)

A malfunction is detected in the electric 
shift control module.

Electric shift control module

P1895 MOTOR SPEED

TM-81

< DTC/CIRCUIT DIAGNOSIS >

[ELECTRIC SHIFT]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

P1895 MOTOR SPEED

DTC Logic

INFOID:0000000010119591

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION:

Always drive vehicle at a safe speed.

1.

PREPARATION BEFORE WORK

If another "DTC CONFIRMATION PROCEDURE" occurs just before, turn the 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. Drive the vehicle at 30 km/h (19 MPH) or more for 60 seconds.

3. Stop the vehicle.

4. Check DTC.
Is “P1895” detected? 

YES

>> Go to 

TM-81, "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:0000000010119592

1.

CHECK DTC OF TRACTION MOTOR INVERTER

With CONSULT

1. Power switch ON.

2. Perform “Self Diagnostic Results” in “MOTOR CONTROL”.
Is any DTC detected?

YES 

>> Check DTC detected item. Refer to 

TMS-28, "DTC Index"

.

NO

>> GO TO 2.

2.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-53, "Intermittent Incident"

.

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.

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

Possible cause

P1895

MOTOR SPEED
(Motor Speed Signal)

The motor speed signal from the traction motor 
inverter is not normal.

• Traction  motor
• Traction motor inverter
• Electric shift control module
• Harness or connectors

(CAN communication line is 
open or shorted.)