Test Notes

Normal Operation

NOTE: DTC 13 will flash only while the short to ground is present.

The air bag diagnostic monitor measures the voltage at Pin C276-11, Circuit 614 (GY/O) and Pin C276-12, Circuit 623 (P/W) of the air bag diagnostic monitor connector. The voltage at these pins varies with charging system voltage. If the air bag diagnostic monitor measures a voltage of 2.0 volts or less at Pins C276-11, Circuit 614 (GY/O) and C276-12, Circuit 623 (P/W), the air bag diagnostic monitor will flash LFC 13 to indicate a possible short to ground on these circuits; refer to Possible Causes for additional circuits that may be shorted to ground. When flashing LFC 13, the air bag diagnostic monitor opens its internal thermal fuse. This disables the air bag deployment circuit. If the voltage at Pins C276-11 and C276-12 returns to normal, a LFC 51 will be present due to the open thermal fuse.

Possible Causes
Low voltage at air bag diagnostic monitor Pins C276-11 and C276-12 can be caused by:
^ a short to ground within the wiring harness on Circuits 614 (GY/O), 615 (GY/W), 616 (PK/BK) or 623 (P/W), causing the diagnostic voltage to drop.
^ an internal short to ground within the air bag sliding contact, causing the driver air bag circuit(s) to be shorted to ground.
^ an internal short to ground within the LH kick panel safing rear air bag sensor and bracket, causing Circuit 614 (GY/O) or 623 (P/W) to be shorted to ground.
^ an internal short to case ground within the driver or passenger air bag assembly.