No.18 SEAT BELT WARNING LIGHT DOES NOT OPERATE (CHIME OPERATES)[INSTRUMENT CLUSTER (AJ (3.0L Duratec))]

id0902h7821900

STEP

INSPECTION

ACTION

1

INSTRUMENT CLUSTER PID

Connect the M-MDS to the DLC-2.

Turn the ignition switch to the ON position.

While monitoring the LFSBELT PID, buckle or unbuckle the driver-side seat belt.

Does the LFSBELT PID indicate “Buckled” when buckling the seat belt and indicate “Unbuckled” when unbuckling it?

Yes

Go to Step 5.

No

Go to the next step.

2

INSPECT SEAT BELT RETRACTOR SWITCH OPERATION

Disconnect the seat belt retractor switch connector.

Turn the ignition switch to the ON position.

Connect a jumper wire with a 10 A fuse between seat belt retractor switch terminals A and B (harness-side).

Does the seat belt warning light illuminate?

Yes

Replace the seat belt retractor switch. Inspect the system for normal operation.

No

Go to the next step.

3

INSPECT FOR OPEN CIRCUIT OR SHORT TO GROUND

Disconnect the instrument cluster connector.

Turn the ignition switch off.

Measure the resistance between instrument cluster terminal 1K (harness-side) and seat belt retractor switch terminal A (harness-side).

Measure the resistance between instrument cluster terminal 1K (harness-side) and ground.

Is the resistance less than 5 ohms between instrument cluster and seat belt retractor switch, and more than 10,000 ohms between instrument cluster and ground?

Yes

Go to the next step.

No

Repair or replace the wiring harness. Inspect the system for normal operation.

4

INSPECT FOR SHORT TO POWER SUPPLY

Turn the ignition switch to the ON position.

Measure the voltage between instrument cluster terminal 1K (harness-side) and ground.

Is there voltage?

Yes

Repair or replace the wiring harness. Inspect the system for normal operation.

No

Go to the next step.

5

INSTRUMENT CLUSTER SIMULATION USING M-MDS

Turn the ignition switch off.

Connect the M-MDS to the DLC-2.

Turn the ignition switch to the ON position.

Select the ALL_LAMP in the simulation items.

Inspect the seat belt warning light.

Does the seat belt warning light illuminate?

Yes

Go to Step 7.

No

Go to the next step.

6

INSPECT INSTRUMENT CLUSTER OPERATION

Disconnect all the instrument cluster connectors.

Inspection:

• Corrosion

• Terminal separation

Connect the instrument cluster connector and verify that its position is correct.

Operate the system and inspect for any malfunction.

Is any malfunction still present?

Yes

Replace the instrument cluster. Inspect the system for normal operation.

No

The system operates normally. The malfunction may result from loose connectors or corrosion. Clear the DTC. Repeat the self-test.

STEP	INSPECTION		ACTION
1	INSTRUMENT CLUSTER PID Connect the M-MDS to the DLC-2. Turn the ignition switch to the ON position. While monitoring the LFSBELT PID, buckle or unbuckle the driver-side seat belt. Does the LFSBELT PID indicate “Buckled” when buckling the seat belt and indicate “Unbuckled” when unbuckling it?	Yes	Go to Step 5.
1		No	Go to the next step.
2	INSPECT SEAT BELT RETRACTOR SWITCH OPERATION Disconnect the seat belt retractor switch connector. Turn the ignition switch to the ON position. Connect a jumper wire with a 10 A fuse between seat belt retractor switch terminals A and B (harness-side). Does the seat belt warning light illuminate?	Yes	Replace the seat belt retractor switch. Inspect the system for normal operation.
2		No	Go to the next step.
3	INSPECT FOR OPEN CIRCUIT OR SHORT TO GROUND Disconnect the instrument cluster connector. Turn the ignition switch off. Measure the resistance between instrument cluster terminal 1K (harness-side) and seat belt retractor switch terminal A (harness-side). Measure the resistance between instrument cluster terminal 1K (harness-side) and ground. Is the resistance less than 5 ohms between instrument cluster and seat belt retractor switch, and more than 10,000 ohms between instrument cluster and ground?	Yes	Go to the next step.
3		No	Repair or replace the wiring harness. Inspect the system for normal operation.
4	INSPECT FOR SHORT TO POWER SUPPLY Turn the ignition switch to the ON position. Measure the voltage between instrument cluster terminal 1K (harness-side) and ground. Is there voltage?	Yes	Repair or replace the wiring harness. Inspect the system for normal operation.
4		No	Go to the next step.
5	INSTRUMENT CLUSTER SIMULATION USING M-MDS Turn the ignition switch off. Connect the M-MDS to the DLC-2. Turn the ignition switch to the ON position. Select the ALL_LAMP in the simulation items. Inspect the seat belt warning light. Does the seat belt warning light illuminate?	Yes	Go to Step 7.
5		No	Go to the next step.
6	INSPECT INSTRUMENT CLUSTER OPERATION Disconnect all the instrument cluster connectors. Inspection: • Corrosion • Terminal separation Connect the instrument cluster connector and verify that its position is correct. Operate the system and inspect for any malfunction. Is any malfunction still present?	Yes	Replace the instrument cluster. Inspect the system for normal operation.
6		No	The system operates normally. The malfunction may result from loose connectors or corrosion. Clear the DTC. Repeat the self-test.