The inflatable restraint IP module deployment loop consists of an inflatable restraint IP module, the IP module - high circuit, and the IP module - low circuit. A shorting bar is used in the inflatable restraint IP module connector which shorts together the IP module - high and IP module - low circuits when the connector is disconnected. This will help to prevent unwanted deployment of the inflator module during servicing. When the ignition is turned ON, the inflatable restraint sensing and diagnostic module (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.
Ignition 1 voltage is within the normal operating voltage range.
The DTC will set if one of the following conditions occurs:
• | IP module deployment loop resistance is 6 ohms for 300 milliseconds. |
• | IP module -- high input is less than 2 volts and the IP module deployment loop resistance is more than 3.7 ohms for 300 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. |
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 in the IP module - high or IP module - low circuits. |
• | A malfunctioning inflatable restraint IP module. |
• | An internal SDM malfunction. |
If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
The number(s) below refer to the step number(s) on the diagnostic table.
Tests to see if the malfunction is intermittent.
Tests to see if the malfunction is caused by the inflatable restraint IP module.
Tests for an open or high resistance in the IP module - high and IP module - low circuits.
Step | Action | Yes | No | ||||||
---|---|---|---|---|---|---|---|---|---|
Schematic Reference: SIR Schematics | |||||||||
1 | Did you perform the Diagnostic System Check - SIR? | Go to Step 2 | |||||||
2 |
Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems. Does the connector exhibit any of the above conditions? | Go to Step 3 | Go to Step 4 | ||||||
3 |
Did you complete the repair? | Go to Step 10 | -- | ||||||
Does the scan tool indicate that DTC B0017 is current? | Go to Step 5 | Go to Diagnostic Aids | |||||||
Does the scan tool indicate that DTC B0017 is current? | Go to Step 7 | Go to Step 6 | |||||||
6 |
Did you complete the replacement? | Go to Step 10 | -- | ||||||
7 |
Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 10 | Go to Step 8 | ||||||
Test the IP module - high and IP module - low circuits for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 10 | Go to Step 9 | |||||||
9 |
Did you complete the replacement? | Go to Step 10 | -- | ||||||
10 |
Does the DTC reset? | Go to Step 2 | System OK |