Nissan Leaf. Manual - part 1133

ST-24

< DTC/CIRCUIT DIAGNOSIS >

[WITH HEATED STEERING WHEEL]

HEATED STEERING WHEEL SWITCH INDICATOR LAMP

2. Check continuity between heated steering wheel relay harness connector terminal and heated steering

wheel switch harness connector terminal.

3. Check continuity between heated steering wheel relay harness connector terminal and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace damaged parts.

4.

CHECK HEATED STEERING WHEEL RELAY

Check heated steering wheel relay. Refer to 

ST-21, "Component Inspection (Heated Steering Wheel Relay)"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace heated steering wheel relay. Refer to 

ST-8, "HEATED STEERING WHEEL SYSTEM :

Component Parts Location"

.

5.

CHECK POWER SOURCE (BATTERY)

Check the following.

• 12V battery

• Harness for short or open between 12V battery and 15A fuse (No. 8)

• 15A fuse (No. 8)

• Harness for short or open between 15A fuse (No. 8) and heated steering wheel relay
Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace damaged parts.

6.

CHECK HARNESS BETWEEN A/C AUTO AMP. AND HEATED STEERING WHEEL SWITCH

1. Check continuity between A/C auto amp. harness connector terminal and heated steering wheel switch

harness connector terminal.

2. Check continuity between A/C auto amp. harness connector terminal and ground.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Repair or replace damaged parts.

7.

CHECK HEATED STEERING WHEEL SWITCH

Check heated steering wheel switch. Refer to 

ST-9, "HEATED STEERING WHEEL SYSTEM : Heated Steer-

ing Wheel Switch"

.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

HAC-187, "Removal and Installation"

 (with heat pump) or 

HAC-

347, "Removal and Installation"

 (without heat pump).

Heated steering wheel relay

Heated steering wheel switch

Continuity

Connector

Terminal

Connector

Terminal

M7

5

M6

5

Yes

Heated steering wheel relay

Ground

Continuity

Connector

Terminal

M7

5

No

A/C auto amp.

Heated steering wheel switch

Continuity

Connector

Terminal

Connector

Terminal

M55

16

M6

1

Yes

A/C auto amp.

Ground

Continuity

Connector

Terminal

M55

16

No

HEATED STEERING WHEEL SWITCH INDICATOR LAMP

ST-25

< DTC/CIRCUIT DIAGNOSIS >

[WITH HEATED STEERING WHEEL]

C

D

E

F

H

I

J

K

L

M

A

B

ST

N

O

P

NO

>> Replace heated steering wheel switch. Refer to 

ST-46, "Removal and Installation"

.

Component Inspection (Heated Steering Wheel Switch)

INFOID:0000000010119091

1.

CHECK HEATED STEERING WHEEL SWITCH

1. Turn power switch OFF.

2. Remove the heated steering wheel switch. Refer to 

ST-46, "Removal and Installation"

.

3. Check continuity between heated steering wheel switch harness connector terminal and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace heated steering wheel switch. Refer to 

ST-46, "Removal and Installation"

.

2.

CHECK HEATED STEERING WHEEL SWITCH INDICATOR LAMP

Apply a voltage of 12V between the heated steering wheel switch connector terminals to check that the indica-

tor lamp turns ON.

CAUTION:

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

• To prevent damage, always observe the correct polarity.

• Prevent short-circuit.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace heated steering wheel switch. Refer to 

ST-46, "Removal and Installation"

.

Component Inspection (Heated Steering Wheel Relay)

INFOID:0000000010119092

1.

CHECK HEATED STEERING WHEEL RELAY CONTINUITY

Check continuity between heated steering wheel relay terminals.

CAUTION:

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

• To prevent damage, always observe the correct polarity.

• Prevent short-circuit.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace heated steering wheel relay. Refer to 

ST-8, "HEATED STEERING WHEEL SYSTEM :

Component Parts Location"

.

Heated steering wheel switch

Condition

Continuity

Terminal

1

2

While pushing heated steering 

wheel switch

Yes

Other condition

No

Heated steering wheel switch

Condition

Indicator lamp status

Terminal

+

–

5

6

Apply 12 V direct current be-

tween terminals 5 and 6. 

ON

Heated steering wheel relay

Condition

Continuity

Terminal

3 

− 5

Apply 12 V direct current between terminals 

1 and 2. 

Yes

Other conditions.

No

ST-26

< SYMPTOM DIAGNOSIS >

[WITH HEATED STEERING WHEEL]

HEATED STEERING WHEEL SYSTEM DOES NOT ACTIVATE

SYMPTOM DIAGNOSIS

HEATED STEERING WHEEL SYSTEM DOES NOT ACTIVATE

Description 

INFOID:0000000010119093

• The heated steering wheel does not warm up.

• The heated steering wheel system cannot be turned OFF.

Diagnosis Procedure

INFOID:0000000010119094

Regarding Wiring Diagram information. Refer to 

EXL-30, "Wiring Diagram"

.

1.

CHECK POWER SOURCE

1. Turn power switch OFF.

2. Remove the heated steering wheel. Refer to 

ST-34, "Removal and Installation"

.

3. Turn power switch ON.

4. Turn heated steering wheel switch ON.

5. Check voltage between heated steering wheel harness connector terminals.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

CHECK HEATED STEERING WHEEL

Check heated steering wheel. Refer to 

ST-21, "Component Inspection (Heated Steering Wheel)"

.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace heated steering wheel. Refer to 

ST-34, "Removal and Installation"

.

3.

CHECK GROUND CIRCUIT

Check continuity between heated steering wheel harness connector terminal and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace damaged parts.

4.

CHECK HARNESS BETWEEN HEATED STEERING WHEEL RELAY AND HEATED STEERING WHEEL

1. Turn power switch OFF.

2. Disconnect heated steering wheel relay connector. Refer to 

ST-8, "HEATED STEERING WHEEL SYS-

TEM : Component Parts Location"

.

3. Check continuity between heated steering wheel relay harness connector terminal and heated steering

wheel harness connector terminal.

Heated steering wheel

Condition

Voltage (Approx.)

Connector

Terminal

M111

1 

− 2

Within 30 seconds after 

turning ON the heated 

steering switch.

Battery voltage

Other conditions.

0 V

Heated steering wheel

Ground

Continuity

Connector

Terminal

M111

2

Yes

HEATED STEERING WHEEL SYSTEM DOES NOT ACTIVATE

ST-27

< SYMPTOM DIAGNOSIS >

[WITH HEATED STEERING WHEEL]

C

D

E

F

H

I

J

K

L

M

A

B

ST

N

O

P

4. Check continuity between heated steering wheel relay harness connector terminal and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace damaged parts.

5.

CHECK HEATED STEERING WHEEL RELAY

Check heated steering wheel relay. Refer to 

ST-21, "Component Inspection (Heated Steering Wheel Relay)"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace heated steering wheel relay. Refer to 

ST-8, "HEATED STEERING WHEEL SYSTEM :

Component Parts Location"

.

6.

CHECK POWER SOURCE (BATTERY)

Check the following.

• 12V battery

• Harness for short or open between 12V battery and 15A fuse (No. 8)

• 15A fuse (No. 8)

• Harness for short or open between 15A fuse (No. 8) and heated steering wheel relay
Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Repair or replace damaged parts.

7.

CHECK GROUND CIRCUIT

Check continuity between heated steering wheel switch harness connector terminal and ground.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Repair or replace damaged parts.

8.

CHECK HARNESS BETWEEN HEATED STEERING WHEEL RELAY AND A/C AUTO AMP.

1. Check continuity between heated steering wheel relay harness connector terminal and A/C auto amp.

harness connector terminal.

2. Check continuity between heated steering wheel relay harness connector terminal and ground.

Is the inspection result normal?

Heated steering wheel relay

Heated steering wheel

Continuity

Connector

Terminal

Connector

Terminal

M7

5

M111

1

Yes

Heated steering wheel relay

Ground

Continuity

Connector

Terminal

M7

5

No

Heated steering wheel switch

Ground

Continuity

Connector

Terminal

M6

2

Yes

Heated steering wheel relay

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M7

2

M55

22

Yes

Heated steering wheel relay

Ground

Continuity

Connector

Terminal

M7

2

No