Action Taken

DERM turns on INFLATABLE RESTRAINT indicator light.

1. Checks whether fault is in steering column or diagnostic circuitry.
2. Checks integrity of 430-ohm resistor and associated circuitry in resistor module.
3. Checks integrity of 49.9-ohm resistor, 100-ohm resistor and associated circuitry in resistor module.
4. Checks integrity of two 2490-ohm resistors and associated circuitry in resistor module.
5. Checks whether steering column fault is due to SIR coil or inflator module.
6. Checks for a short from circuit No. 347 to circuit No. 348.
7. Checks for an open in SENSE HIGH circuit.
8. Checks for a short from SENSE HIGH circuit to FORCE LOW circuit.
9. Checks for short from SENSE LOW circuit to FORCE HIGH circuit.
10. Checks if fault is due to SENSE HIGH circuit No. 753 or a faulty DERM.

Fig 1: CURRENT CODE 22, CHART 1 Steering Column Resistance too Low

Courtesy of GENERAL MOTORS CORP.

Fig 2: CURRENT CODE 22, CHART 2 Steering Column Resistance too Low

Courtesy of GENERAL MOTORS CORP.