Retrieving Diagnostic Trouble Codes Using AIR Bag Monitor Coupler (On Board Diagnostics)

If a Tech 1 scan tool is not available, on-board diagnostics can be performed through AIR BAG warning light. Use a jumper wire to connect diagnostic switch and ground terminals on air bag monitor coupler. See Figure. Sensing and Diagnostic Module (SDM) displays DTCs by flashing AIR BAG warning light. Each DTC displayed consists of a number of flashes which represent the first digit, a 1.2 seconds pause and then a number of flashes which represent the second digit of the DTC. A pause of 3.2 seconds will occur before next DTC is displayed. Each DTC is flashed once before moving to next one. Once all DTCs have flashed, cycle will begin again.