DTC 0066

DTC 0066

CIRCUIT DESCRIPTION
The seat belt pretensioner deployment loop consists of a seat belt pretensioner, the seat belt pretensioner high and seat belt pretensioner low circuits. A shorting bar is used in the seat belt pretensioner connector, which will short together the seat belt pretensioner high and seat belt pretensioner low circuits, when the connector is disconnected. This will help to prevent unwanted deployment of the seat belt pretensioner during servicing. During a frontal crash of sufficient force, the sensing and diagnostic module (SDM) will allow current to flow through the deployment loop in order to deploy the seat belt pretensioner. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity, and for shorts to ground or voltage. If a malfunction is detected, a DTC will be stored.

DTC DESCRIPTOR
This diagnostic procedure supports the following DTCs:
DTC 0065 RF Pretensioner Deployment Loop Short to Battery
DTC 0066 RF Pretensioner Deployment Loop Voltage Out of Range

CONDITIONS FOR RUNNING THE DTC
Ignition voltage is within the normal operating voltage range.

CONDITIONS FOR SETTING THE DTC
- DTC 0065 will set when the SDM detects a short to voltage in the RH seat belt pretensioner deployment loop.
- DTC 0066 will set when the SDM detects a short to ground in the RH seat belt pretensioner deployment loop.

ACTION TAKEN WHEN THE DTC SETS
The SDM commands the AIR BAG indicator ON.

CONDITIONS FOR CLEARING THE DTC
The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.

DIAGNOSTIC AIDS
Thoroughly inspect the wiring and the connectors. An incomplete inspection of the wiring and the connectors may result in a misdiagnosis, causing a part replacement with the reappearance of the malfunction.

The following are possible causes of the malfunction:
- A short to voltage in the seat belt pretensioner high or the seat belt pretensioner low circuits
- A short to ground in the seat belt pretensioner high or the seat belt pretensioner low circuits
- A malfunctioning RH seat belt pretensioner
- An internal SDM malfunction

If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections.

TEST DESCRIPTION

Step 1 - Step 13:

The numbers below refer to the step numbers on the diagnostic table.
4. This step tests the seat belt pretensioner high and the seat belt pretensioner low circuits for a short to voltage.
8. This step tests to see if the malfunction is caused by the RH seat belt pretensioner.
9. This step tests the seat belt pretensioner high and the seat belt pretensioner low circuits for a short to ground.