Nissan Pathfinder. Instruction - part 1114

HEATED STEERING WHEEL SYSTEM

ST-35

< DTC/CIRCUIT DIAGNOSIS >

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 harness or connector.

5.

CHECK HEATED STEERING RELAY

Check heated steering relay. Refer to 

ST-36, "Component Inspection (Heated Steering Relay)"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace heated steering relay.

6.

CHECK POWER TO HEATED STEERING RELAY

Check the following.

• Battery

• Harness for open or short between battery and 10A fuse (No. 74)

• 10A fuse (No. 74)

• Harness for open or short between 10A fuse (No. 74) and heated steering relay
Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Repair or replace damaged parts.

7.

CHECK GROUND CIRCUIT

1. Disconnect heated steering wheel switch.

2. 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 harness or connector.

8.

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

1. Disconnect A/C auto amp.

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

harness connector terminal.

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

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Repair or replace harness or connector.

9.

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.

Heated steering wheel relay

Ground

Continuity

Connector

Terminal

M90

5

No

Connector

Terminal

Ground

Continuity

M48

2

Yes

Heated steering relay

A/C Auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M90

2

M50

20

Yes

Heated steering relay

Ground

Continuity

Connector

Terminal

M90

2

No

ST-36

< DTC/CIRCUIT DIAGNOSIS >

HEATED STEERING WHEEL SYSTEM

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

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> Repair or replace harness or connector.

10.

CHECK HEATED STEERING WHEEL SWITCH

Check heated steering wheel switch. Refer to 

ST-36, "Component Inspection (Heated Steering Wheel

Switch)"

.

Is the inspection result normal?

YES

>> Replace A/C Auto amp. Refer to 

HAC-157, "Removal and Installation"

.

NO

>> Replace heated steering wheel switch. Refer to 

IP-25, "Removal and Installation"

.

Component Inspection (Heated Steering Wheel Switch)

INFOID:0000000009177092

1.

CHECK HEATED STEERING WHEEL SWITCH

1. Turn ignition switch OFF.

2. Remove the heated steering wheel switch. Refer to 

IP-25, "Removal and Installation"

.

3. Check continuity between heated steering wheel switch terminals.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace heated steering wheel switch.

2.

CHECK HEATED STEERING WHEEL SWITCH INDICATOR LAMP

Apply 12V direct current between heated steering wheel switch terminals and check that the indicator lamp

turns ON.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace heated steering wheel switch.

Component Inspection (Heated Steering Relay)

INFOID:0000000009177093

1.

CHECK HEATED STEERING RELAY CONTINUITY

1. Turn ignition switch OFF.

2. Remove heated steering relay. Refer to 

ST-7, "HEATED STEERING WHEEL SYSTEM : Component

Parts Location"

.

3. Apply 12V direct current between heated steering relay terminals and check continuity.

A/C Auto amp.

Heated steering wheel switch

Continuity

Connector

Terminal

Connector

Terminal

M50

8

M48

1

Yes

A/C Auto amp.

Ground

Continuity

Connector

Terminal

M50

8

No

Terminal

Condition

Continuity

1

2

switch pressed

Yes

switch released

No

Terminals

Condition

Indicator lamp status

+

–

5

6

Apply 12V direct current be-

tween terminals

ON

HEATED STEERING WHEEL SYSTEM

ST-37

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

H

I

J

K

L

M

A

B

ST

N

O

P

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace heated steering wheel relay.

Component Inspection (Heated Steering Wheel)

INFOID:0000000009177094

1.

CHECK HEATED STEERING WHEEL CONTINUITY

1. Turn ignition switch OFF.

2. Remove the steering wheel. Refer to 

ST-44, "Removal and Installation"

.

3. Check continuity between steering wheel connector terminals.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace heated steering wheel.

2.

CHECK HEATED STEERING WHEEL RESISTANCE

Check resistance between heated steering wheel connector terminals.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace heated steering wheel.

Terminal

Condition

Continuity

3 

− 5

12V direct current applied between termi-
nals 1 and 2.

Yes

No current applied.

No

Terminals

Condition

Continuity

1 

− 2

Surface temperature of less than 30

°C 

(86

°F)

Yes

Surface temperature of 30

°C (86°F) or 

more

No

Terminals

Condition

Resistance

1 

− 2

Surface temperature of 20

°C (68°F)

1.7 – 2.17 

Ω

ST-38

< DTC/CIRCUIT DIAGNOSIS >

HEATED STEERING WHEEL SWITCH INDICATOR LAMP

HEATED STEERING WHEEL SWITCH INDICATOR LAMP

Component Function Check

INFOID:0000000009177095

1.

CHECK HEATED STEERING WHEEL SWITCH INDICATOR LAMP

1. Turn ignition switch ON.

2. Turn heated steering wheel switch ON. Observe indicator.

3. Turn heated steering wheel switch OFF.  Observe indicator.
Does heated steering wheel switch indicator lamp turn ON and then OFF?

YES

>> Inspection End.

NO

>> Go to 

ST-38, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009177096

Regarding Wiring Diagram information, refer to 

ST-10, "Wiring Diagram"

.

1.

CHECK POWER CIRCUIT

1. Turn ignition switch OFF.

2. Remove the heated steering wheel switch. Refer to 

IP-25, "Removal and Installation"

.

3. Turn ignition switch ON.

4. Check voltage between heated steering wheel switch harness connector terminals.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

CHECK GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect heated steering wheel switch connector.

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

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK HARNESS BETWEEN HEATED STEERING RELAY AND HEATED STEERING WHEEL SWITCH

1. Disconnect heated steering relay connector.

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

switch harness connector terminal.

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

Connector

Terminal

Voltage (Approx.)

+

-

M48

1

2

Battery voltage

Connector

Terminal

Ground

Continuity

M48

6

Yes

Heated steering relay

Heated steering wheel switch

Continuity

Connector

Terminal

Connector

Terminal

M90

5

M48

5

Yes

Connector

Terminal

Ground

Continuity

M90

5

No