DTC 038

DTC 38

CIRCUIT DESCRIPTION
The inflatable restraint instrument panel (I/P) module deployment loop consists of a inflatable restraint I/P module, the I/P module high and I/P module low circuits. A shorting bar used in the inflatable restraint I/P module connector which will short together the I/P high and I/P module low circuits when the connector is disconnected, this will help to prevent unwanted deployment of the inflator module 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 inflatable restraint I/P module. 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.

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

CONDITIONS FOR SETTING THE DTC
- DTC 37 will set when the SDM detects a high resistance condition in the I/P module deployment loop.
- DTC 38 will set when the SDM detects a low resistance condition in the I/P module 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:
- An open or high resistance in the I/P module high or the I/P module low circuits.
- A short between the I/P module high and the I/P module low circuits.
- A malfunctioning inflatable restraint I/P module.
- An internal SDM malfunction.

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

TEST DESCRIPTION

Step 1 - 4:

Step 5 - 10:

The numbers below refer to the step numbers on the diagnostic table.
5. Tests to see if the malfunction is caused by the inflatable restraint I/P module.
7. If DTC 37 is present, test the I/P module high and the I/P module low circuits for an open or high resistance.

If DTC 38 is present, test for a short between the I/P module high and the I/P module low circuits.