The passenger seat belt retractor pretensioner deployment loop consists the following components:
• | An inflatable restraint seat belt retractor pretensioner RF |
• | The seat belt retractor pretensioner RF high circuits |
• | The seat belt retractor pretensioner RF low circuits |
A shorting bar used within the seat belt retractor pretensioner connector 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 DTC will be stored in memory.
This diagnostic procedure supports the following DTCs:
• | DTC B0057 Right Front Pretensioner Deployment Loop Resistance Low |
• | DTC B0058 Right Front Pretensioner Deployment Loop Open |
• | DTC B0059 Right Front Pretensioner Deployment Loop Voltage Out of Range |
Ignition 1 voltage is within the normal operating voltage range.
• | DTC B0057 will set when the seat belt pretensioner RF deployment loop resistance is less than 1.3 ohms for 500 milliseconds. |
• | DTC B0058 will set when one of the following conditions occurs: |
- | The seat belt pretensioner RF high circuit is less than 2.4 volts and the seat belt pretensioner RF deployment loop is more than 6 ohms for 500 milliseconds. |
- | The seat belt pretensioner RF deployment loop resistance is more than 4.8 ohms for 500 milliseconds. |
• | DTC B0059 when one of the following conditions occur: |
- | The seat belt pretensioner RF high and/or low circuits are short to ground or short to voltage for 500 milliseconds. |
- | The seat belt pretensioner RF high circuit is less than 2.4 volts and the seat belt pretensioner RF deployment loop resistance is less than 6 ohms for 500 milliseconds. |
The SDM commands the AIR BAG indicator ON via class 2 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 RF high and low circuits |
• | An open or a high resistance in the seat belt pretensioner RF high or low circuits |
• | A short to ground or a short to voltage in the seat belt pretensioner RF high or low circuits |
• | The seat belt pretensioner RF 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 .
The numbers below refer to the step numbers on the diagnostic table.
This step tests to see if the malfunction is caused by the seat belt pretensioner RF.
This step tests to see what DTCs are present. If DTC B0057 is present, test the seat belt pretensioner RF for a short between high and low circuits. If DTC B0058 is present, test the seat belt pretensioner RF high and low circuits for an open and for high resistance. If DTC B0059 is present, test the seat belt pretensioner RF high and low circuits for a short to ground and for a short to voltage.
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 | |
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: If the scan tool displays multiple codes, diagnose the open code first. Does the scan tool indicate that DTC B0057, B0058, or B0059 are 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 |