Troubleshooting Intermittent Failures
If there was a malfunction that sets a DTC, but it does not recur, a DTC will be stored in the memory, and the SRS indicator may come on the malfunction detected.
NOTE:
- Check the condition of the 12 volt battery (see 12 VOLT BATTERY TEST ), and the charging system. Low battery voltage may cause some intermittent failures.
- A faulty cable reel can cause intermittent connections related to the driver's airbag inflator DTCs.
- Check for DTCs with the HDS (see HOW TO READ DTCS ).
- Clear the DTCs with the HDS (see HOW TO CLEAR DTCS ).
- Set the parking brake, then start the engine, and let it idle.
- The SRS indicator comes on for about 6 seconds and then goes off.
- Shake the related wire harnesses and the connectors, and look for loose connections, poor pin fits, and poor grounds.
- Take a test-drive (quick acceleration, quick braking, and cornering), turn the steering wheel fully left and right, and hold it there for 5 to 10 seconds. If the problem recurs, the SRS indicator will come on.
- If you cannot duplicate the concern, ask the customer about the conditions when it occurred, or ask the customer to demonstrate the concern.
- If you cannot duplicate the intermittent failure, the system is OK at this time.