Failure Mode C
Failure Mode C: Short in Cowl, or Open in Both Dash SensorsNOTE:
The radio may have a five-digit coded theft protection circuit. Be sure to get the customer's code number before disconnecting the battery cable.
Test Harness B Troubleshooting:
1. Connect Test Harness B (07MAZ - SPOO5OO) between the SRS unit and SRS main harness 18-P connector.
Test Harness B Connector Pinout:
(With front passenger's airbag):
Check the resistance between the driver's airbag inflator terminals B1 and B7, and between the passenger's airbag inflator terminals B2 and B8.
- If the resistance is more than 0.2 Kohm for either set of terminals, go to mode E and F troubleshooting.
- If the resistance is less than 0.2 Kohm for both sets of terminals, go to step 2.
Test Harness B Connector Pinout:
2. Disconnect the battery negative cable and then the positive cable. Install the short connector(s) on the airbag(s). Then 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 5 Kohm for either set of terminals, go to step 4.
- If resistance is less than 5 Kohm for both sets of terminals, the SRS unit is faulty. Substitute a known-good SRS unit and recheck the voltages according to the appropriate Failure Mode Diagnostic Chart. Refer to Failure Mode Diagnostic Chart.
Installation Of Test Harness D:
3. Connect Test Harness D (O7LAZ - SL4O4OO) 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 5 Kohm, the dash sensor is faulty. Replace it and recheck the voltages according to the appropriate Failure Mode Diagnostic Chart. Refer to Failure Mode Diagnostic Chart.
- If resistance is less than 5 Kohm, the SRS main harness is faulty. Replace it and recheck the voltages according to the appropriate Failure Mode Diagnostic Chart. Refer to Failure Mode Diagnostic Chart.