Diagnosis Procedure

WARNING: This page is about a different car, the 2016 Infiniti Q50. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION:

Since hybrid vehicles and electric vehicles contain a high voltage battery, there is the risk of electric shock, electric leakage, or similar accidents if the high voltage component and vehicle are handled incorrectly. Be sure to follow the correct work procedures when performing inspection and maintenance.

WARNING:

Be sure to remove the service plug in order to disconnect the high voltage circuits before performing inspection or maintenance of high voltage system harnesses and parts.
The removed service plug must always be carried in a pocket of the responsible worker or placed in the tool box during the procedure to prevent the plug from being connected by mistake.
Be sure to wear insulating protective equipment before beginning work on the high voltage system.
Never allow workers other than the responsible person to touch the vehicle containing high voltage parts. To keep others from touching the high voltage parts, these parts must be covered with an insulating sheet except when using them.
Refer to HIGH VOLTAGE PRECAUTIONS .

CAUTION:

Never bring the vehicle into the READY status with the service plug removed unless otherwise instructed in the Service information. A malfunction may occur if this is not observed.

PRECONDITIONING

WARNING:
Follow the instructions below before starting the procedure.
1. Disconnect high voltage circuit. Refer to HOW TO DISCONNECT HIGH VOLTAGE .
2. Check voltage in high voltage circuit. Refer to CHECK VOLTAGE IN HIGH VOLTAGE CIRCUIT .
GO TO STEP 2 .

CHECK HEATED SEAT RELAY POWER SUPPLY

Turn ignition switch OFF.
Disconnect heated seat relay.
Turn ignition switch ON.

Check voltage between heated seat relay terminal connector and ground.

(+)		(-)	Voltage
Heated seat relay
Connector	Terminal
M46	2	Ground	Battery voltage

Is the inspection result normal?

YES

GO TO STEP 4 .

GO TO STEP 3 .

CHECK HEATED SEAT RELAY POWER SUPPLY CIRCUIT

Turn ignition switch OFF.
Disconnect fuse block (J/B) connector.

Check continuity between heated seat relay terminal connector and fuse block (J/B) harness connector.

Heated seat relay		Fuse block (J/B)		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M46	2	M133	30C	Existed

Check continuity between heated seat relay terminal connector and ground.

Heated seat relay		Ground	Continuity
Connector	Terminal
M46	2		Not existed

Is the inspection result normal?

YES

Check 5 A fuse [No. 14, located in the fuse block (J/B)]

Repair or replace harness.

CHECK HEATED SEAT RELAY GROUND CIRCUIT 1

Disconnect Li-ion battery connector.

Check continuity between heated seat relay harness connector and Li-ion battery harness connector.

Heated seat relay		Li-ion battery		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M46	1	T28	7	Existed

Check continuity between heated seat relay terminal connector and ground.

Heated seat relay		Ground	Continuity
Connector	Terminal
M46	1		Existed

Is the inspection result normal?

YES

GO TO STEP 5 .

Repair or replace harness.

CHECK HEATED SEAT RELAY GROUND CIRCUIT 2

Disconnect DC/DC converter connector.

Check continuity between heated seat relay harness connector and Li-ion battery harness connector.

DC/DC converter		Li-ion battery		Continuity
Connector	Terminal	Connector	Terminal	Continuity
T101	6	T28	7	Existed

Is the inspection result normal?

YES

GO TO STEP 6 .

Repair or replace error-detected parts. Refer to CIRCUIT DIAGRAM .

CHECK HEATED SEAT RELAY

Check heated seat relay.

Refer to COMPONENT INSPECTION .

Is the inspection result normal?

YES

GO TO STEP 7 .

NO

Replace heated seat relay.

CHECK INTERMITTENT INCIDENT

Check intermittent incident.

Refer to INTERMITTENT INCIDENT .

INSPECTION END