Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

CHECK POWER CIRCUIT

Turn ignition switch OFF.
Remove the steering wheel. Refer to Removal and Installation .
Turn ignition switch ON.
Turn heated steering wheel switch ON.

Check voltage between heated steering wheel harness connector terminals.

Connector

Terminals

Voltage

(Approx.)

Battery voltage

Is the inspection result normal?

YES

GO TO 2 .

GO TO 3 .

CHECK HEATED STEERING WHEEL
Check heated steering wheel. Refer to Component Inspection (Heated Steering Wheel) .

Is the inspection result normal?

YES

Inspection End.

NO

Replace heated steering wheel. Refer to Removal and Installation .

CHECK GROUND CIRCUIT

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

Connector	Terminal	Ground	Continuity
	2	Ground	Yes

Is the inspection result normal?

YES

GO TO 4 .

Repair or replace harness or connector.

CHECK HARNESS BETWEEN HEATED STEERING RELAY AND HEATED STEERING WHEEL

Turn ignition switch OFF.
Disconnect heated steering relay connector.

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

Heated steering relay		Heated steering wheel		Continuity
Connector	Terminal	Connector	Terminal	Continuity
	5	M114	1	Yes

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

Heated steering relay		Ground	Continuity
Connector	Terminal
	5		No

Is the inspection result normal?

YES

GO TO 5 .

Repair or replace harness or connector.

CHECK HEATED STEERING RELAY
Check heated steering relay. Refer to Component Inspection (Heated Steering Relay) .

Is the inspection result normal?

YES

GO TO 6 .

NO

Replace heated steering relay.
CHECK POWER TO HEATED STEERING RELAY
Check the following:
- Battery
- Harness for open or short between battery and 10A fuse (No. 6)
- 10A fuse (No. 6)
- Harness for open or short between 10A fuse (No. 6) and heated steering relay
Is the inspection result normal?

YES

GO TO 7 .

NO

Repair or replace damaged parts.

CHECK GROUND CIRCUIT

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

Connector	Terminal	Ground	Continuity
	8	Ground	Yes

Is the inspection result normal?

YES

GO TO 8 .

Repair or replace harness or connector.

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

Disconnect A/C auto amp.

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

Heated steering relay		A/C auto amp.		Continuity
Connector	Terminal	Connector	Terminal	Continuity
	2	M37	20	Yes

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

Heated steering relay		Ground	Continuity
Connector	Terminal
	2		No

Is the inspection result normal?

YES

GO TO 9 .

Repair or replace harness or connector.

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

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

A/C auto amp.		Heated steering wheel switch		Continuity
Connector	Terminal	Connector	Terminal	Continuity
	8	M96	6	Yes

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

A/C auto amp.		Ground	Continuity
Connector	Terminal
	8		No

Is the inspection result normal?

YES

GO TO 10 .

Repair or replace harness or connector.

CHECK HEATED STEERING WHEEL SWITCH
Check heated steering wheel switch. Refer to Component Inspection (Heated Steering Wheel Switch) .

Is the inspection result normal?

YES

Replace A/C auto amp. Refer to Removal and Installation .

NO

Replace heated steering wheel switch. Refer to Removal and Installation .