Chart A, Intermittent DTC Diagnosis (2 Of 2)

NOTE: Test numbers refer to test numbers on diagnostic chart. For circuit number identification, see WIRING DIAGRAMS.

1. 7)  A DTC 22 will set if instrument cluster is disconnected or removed and ignition switch is turned to ACC or ON.
2. 8)  Checks for open ECU-B fuse or AIR BAG indicator bulb. Also checks for intermittent opens and shorts to ground in AIR BAG indicator circuits.

WARNING: To avoid air bag deployment and injury when trouble shooting system, only use test equipment specified in diagnostic charts.

Fig 1: Flowchart A, Intermittent DTC Diagnosis (2 of 2)

Courtesy of GENERAL MOTORS CORP.