Test Notes

Normal Operation

NOTE: Diagnostic Trouble Code (DTC) 13 will only flash while a short to ground is present. The cause of DTC 13 must be located and repaired before replacing the air bag diagnostic monitor.







The air bag diagnostic monitor measures system voltage at pins 11 and 12 of the air bag diagnostic monitor connector C2. The voltage at these pins varies with charging system voltage (the expected voltages at pins 11 and 12 are shown in the chart). If the air bag diagnostic monitor measures a voltage of 2.0 volts or less at pins 11 and 12, the air bag diagnostic monitor will flash out DTC 13 to indicate a possible short to ground. When flashing DTC 13, the air bag diagnostic monitor blows the internal thermal fuse. This disables the air bag deployment circuits. If the voltage at pins 11 and 12 returns to normal, a DTC 51 will be present due to the open internal thermal fuse. Refer to Pinpoint Test T, DTC 51.

Possible Causes
Low voltage at pins 11 and 12 can be caused by:
- A short to ground on circuits 606 (P/W), 611 (GN/Y), 612 (BK/Y), or 613 (BK/ON).
- An internal short to ground within the air bag sliding contact.
- An internal short to ground within the safing rear air bag sensor.
- An internal short to case ground within the driver side air bag module.