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Home >> Honda >> 1993 >> Accord L4-2156cc 2.2L SOHC >> Repair and Diagnosis >> Restraints and Safety Systems >> Air Bag Systems >> Testing and Inspection >> Component Tests and General Diagnostics >> Failure Mode B

Failure Mode B

Failure Mode B: Short In Inflator/Dash Sensor, or Open Cowl

NOTE: The radio may have a five-digit coded theft protection circuit. Be sure to get the customer's code number before disconnecting the battery cables.

1. Before disconnecting any part of the SRS wire harness, install the short connector(s).


Installation Of Test Harness B:






2. Connect Test Harness B (07MAZ - SPOO5OO) between the SRS unit and SRS main harness 18-P connector.


Test Harness B Connector Pinout:






3. Reconnect the driver's airbag connector, then check continuity between the B1 terminal and body ground, and between the B7 terminal and body ground.
- If there is continuity at either terminal, go to step 6.
- If there is no continuity at either terminal, go to step 4.


Test Harness B Connector Pinout:






4. Reconnect the front passenger's airbag connector, then check continuity between the B2 terminal and body ground, and between the B8 terminal and body ground.
- If there is continuity at either terminal, go to step 10.
- If there is no continuity at either terminal, go to step 5.


Test Harness B Connector Pinout:







5. Check continuity between body ground and each terminal of both dash sensors.
- If there is continuity at any of the terminals, go to step 12.
- If there is no continuity at any terminal, go to step 13.


Installation Of Test Harness C:







6. Disconnect the cable reel harness 6-P connector from the SRS main harness, then connect Test Harness C (O7LAZ - SL4O3OO) only to the cable reel side of the 6-P connector.


Test Harness C Connector Pinout:







7. Check continuity between the No.4 terminal and body ground, and between the No.5 terminal and body ground.
- If there is continuity at either terminal, go to step 8.
- If there is no continuity at either terminal, 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.


Installing Test Harness C:







8. Disconnect the driver's airbag 3-P connector from the cable reel, then connect Test Harness C (O7LAZ - SL40300) to the driver's airbag 3-P connector.


Test Harness C Connector Pinout:








9. Check continuity between the No.7 terminal and body ground, and between the No.8 terminal and body ground.
- If there is continuity at either terminal, the driver's airbag inflator is faulty. Replace it and recheck the voltages according to the appropriate Failure Mode Diagnostic Chart. Refer to Failure Mode Diagnostic Chart.
- If there is no continuity at either terminal, the cable reel is faulty. Replace it and recheck the voltages according to the appropriate Failure Mode Diagnostic Chart. Refer to Failure Mode Diagnostic Chart.


Installation Of Test Harness C:








10. Disconnect the front passenger's airbag 3-P connector from the SRS main harness, then connect Test Harness C (O7LAZ - SL40300) to the airbag side of the connector.



Test Harness C Connector Pinout:







11. Check continuity between the No.7 terminal and body ground, and between the No.8 terminal and body ground.
- If there is continuity at either terminal, the front passenger's airbag inflator is faulty Replace it and recheck the voltages according to the appropriate Failure Mode Diagnostic Chart. Refer to Failure Mode Diagnostic Chart.
- If there is no continuity at either terminal, 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.


Installing Test Harness D:







12. Connect Test Harness D (O7LAZ SL4O4OO) between the dash sensor and SRS main harness 2-P connector. Check continuity between the No. 1 terminal and body ground, and between the No. 2 terminal and body ground.
- If there is continuity at either terminals, 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 there is no continuity at either terminals, 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.


Test Harness D Connector Pinout:







13. 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 3.8 4.2 Kohm for both sensors, 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.
- If resistance is less than 3.8 Kohm for either sensor, go to step 14.


Test Harness D Troubleshooting:







14. Connect Test Harness 0 (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 3.8 4.2 Kohm, the SRS main harness is faulty. Replace it and recheck the voltages according to the chart appropriate Failure Mode Diagnostic Chart. Refer to Failure Mode Diagnostic Chart.
- If resistance is less than 3.8 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.
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