Caution: Refer to SIR Special Tool Caution in the Preface section.
These diagnostic procedures will help you to find and repair SIR system malfunctions. For best results, use the diagnostic tables and follow the sequence listed below:
- Refer to the diagnostic table as directed by a Diagnostic System Check -SIR. The diagnostic tables will help you to diagnose any SIR system malfunction. Bypassing these procedures may result in the following:
- Repeat a Diagnostic System Check - SIR after you perform any repair or diagnostic procedures. This will verify that you correctly performed the repair. This will also ensure that no other malfunctions exist.
| • | Extended Diagnostic Time |
| • | Incorrect Diagnosis |
| • | Incorrect Parts Replacement |
Test Description
The numbers below refer to the step numbers on the diagnostic table.
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Tests to see if the AIR BAG indicator flashes seven times when the ignition is turned ON. The AIR BAG indicator should turn OFF after flashing seven times.
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Tests to see if the scan tool powers up
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Tests to see if the scan tool can communicate with the inflatable restraint sensing and diagnostic module (SDM)
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Tests to see if there are current or history diagnostic trouble codes (DTCs) present
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Tests to see if DTC B1000 (ECU Malfunction) is present
Step | Action | Yes | No |
|---|---|---|---|
Note the AIR BAG indicator while turning ON the ignition. Does the AIR BAG indicator flash seven times? | Go to Step 2 | Go to Symptoms - SIR | |
Install a scan tool. Does the scan tool power up? | Go to Step 3 | Go to Scan Tool Does Not Power Up in Data Link Communications | |
Attempt to establish communication with the SDM. Does the scan tool communicate with the SDM? | Go to Step 4 | Go to Scan Tool Does Not Communicate with UART Data Line in Data Link Communications | |
Does the scan tool display any current or history DTCs? | Go to Step 5 | System OK | |
Does the scan tool display DTC B1000? | Go to DTC B1000 |
