Operation CHARM: Car repair manuals for everyone.

Failure Mode C and D




Mode C: Short in one cowl sensor, or open in both dash sensors.

Mode D: Open in one dash sensor.


NOTE The original radio has a coded theft protection circuit. Be sure you get the code number before disconnecting the battery cables.

1. Before disconnecting any part of the SRS wire harness, disconnect both the negative and positive battery cables. Then install the short connectors - refer to "Short Connector Installation" procedure.

2. Connect the Test Harness B between the SRS unit and the SRS main harness 18-P connector. Check the resistance between the left dash sensor terminals B12 and B16, and between the right dash sensor terminals B4 and B6.






- If resistance is more than 5K ohms, go to step 3.

- If resistance is less than 5K ohms, the SRS unit is faulty. Substitute a known-good SRS unit and recheck the voltages according to the chart in the "Indicator Stays On Continuously" procedure.

3. Connect Test Harness D between the dash sensor and SRS main harness 2-P connector. Check the resistance between the No.1 terminal and No.2 terminal.






- If resistance is more than 5K ohms, the dash sensor is faulty. Replace and recheck the voltages according to the chart in the "Indicator Stays On Continuously" procedure.

- If resistance is less than 5K ohms, the SRS main harness is faulty Replace the SRS main harness and recheck the voltages according to the chart in the "Indicator Stays On Continuously" procedure.