The driver seat belt pretensioner deployment loop consists of an seat belt pretensioner-LF, the seat belt pretensioner-LF high and seat belt pretensioner-LF low circuits. A shorting bar used within the seat belt pretensioner connector which will short together both seat belt pretensioner high and low circuits when the connector is disconnected, this will help to prevent unwanted deployment of the pretensioner during servicing. During a frontal crash of sufficient force the inflatable restraint 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 diagnostic trouble code (DTC) will be stored in memory.
DTC B0015 Left Front Seat Belt Pretensioner Deployment Loop
DTC Symptom | DTC Symptom Descriptor |
---|---|
01 | Short to battery |
02 | Short to ground |
04 | Open circuit |
0D | Resistance above threshold |
0E | Resistance below threshold |
Ignition voltage is within the normal operating voltage range.
The seat belt pretensioner-LF high and/or low circuit is short to voltage for 120 milliseconds.
The seat belt pretensioner-LF high and/or low circuit is short to ground for 120 milliseconds.
The seat belt pretensioner-LF high and/or low circuit is open for 120 milliseconds.
The seat belt pretensioner-LF deployment loop resistance is more than 3.9 ohms for 120 milliseconds.
The seat belt pretensioner-LF deployment loop resistance is less than 1.1 ohms for 120 milliseconds.
The SDM commands the AIR BAG indicator ON via GMLAN serial data.
• | The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used. |
• | A history DTC will clear once 255 malfunction free ignition cycles have occurred. |
The following are possible causes of the malfunction:
• | A short between the seat belt pretensioner-LF high and low circuits. |
• | An open or a high resistance in the seat belt pretensioner-LF high or low circuits. |
• | A short to ground or a short to voltage in the seat belt pretensioner-LF high or low circuits. |
• | The seat belt pretensioner-LF connector |
• | The SDM connector |
• | A malfunctioning seat belt pretensioner |
• | A malfunctioning SDM |
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. If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
The numbers below refer to the step numbers on the diagnostic table.
Tests to see if the malfunction is caused by the seat belt pretensioner-LF.
Tests to see what DTCs are present. If DTC B0015 01 is present, test the seat belt pretensioner-LF for a short to battery voltage on the high and low circuits. If DTC B0015 02 is present, test the seat belt pretensioner-LF high and low circuits for a short to ground. If DTC B0015 04, 0D, 0E is present, test the seat belt pretensioner-LF high and low circuits for an open circuit and for high or low resistance.
Step | Action | Yes | No |
---|---|---|---|
Schematic Reference: SIR Schematics Connector End View Reference: SIR Connector End Views | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
2 |
Does the connector exhibit any signs of damage or corrosion? | Go to Step 3 | Go to Step 4 |
3 |
Did you complete the repair? | Go to Step 9 | -- |
Important: CANdi module J-45289 must be used with the scan tool. Does the scan tool indicate that DTC B0015 is current? | Go to Step 5 | Go to Step 7 | |
5 |
Did you find and correct the condition? | Go to Step 9 | Go to Step 6 |
Did you find and correct the condition? | Go to Step 9 | Go to Step 8 | |
7 |
Did you complete the replacement? | Go to Step 9 | -- |
8 |
Did you complete the replacement? | Go to Step 9 | -- |
9 |
Does the DTC reset? | Go to Step 2 | System OK |