Test Notes

NORMAL OPERATION
The voltage at pin C209-15 circuit 619 (PK/W) is set by the air bag diagnostic monitor to be slightly less than battery voltage. Circuit 619 (PK/W) is connected to circuit 625 (Y/LG) inside the LH air bag sensor. Therefore, the voltage at circuit 625 and air bag diagnostic monitor pin C208-23 should be the same as the voltage at air bag diagnostic monitor pin C209-15 circuit 619 (PK/W).

The air bag diagnostic monitor periodically pulls the voltage at pin C209-15 circuit 619 (PK/W) low to verify the connection to pin C208-23 circuit 625 (Y/LG). If the voltage at pin C208-23 circuit 625 (Y/LG) does not pull low as a result of this test, the air bag diagnostic monitor will store in memory the Diagnostic Trouble Code (DTC) B1942 and flash Lamp Fault Code (LFC) 42 on the air bag indicator. If the connection between pins C209-15 circuit 625 (Y/LG) and C208-23 circuit 625 (Y/LG) is later repaired, the DTC B1942 will be stored in memory.

POSSIBLE CAUSES
Failure to get low voltage at pin C208-23 circuit 625 (Y/LG) during the test can be caused by:
- An open circuit in the wiring harness in either circuit 619 (PK/W) or circuit 625 (Y/LG).