DTC 22

Circuit Description:
When the ignition switch is turned ON, the SDM will perform tests to diagnose critical malfunctions within itself. Upon passing these tests ignition 1, and deployment loop voltages are measured to ensure they are within their respective normal voltage ranges. The SDM then proceeds with the Resistance Measurement Test Driver Bag Low terminal 4 is grounded through a current sink and the driver current source connected to Driver Bag High terminal 3 allows a known amount of current to flow. By monitoring the voltage difference between Driver Bag High and Driver Bag Low the SDM calculates the combined resistance of the driver air bag assembly, SRS coil assembly, harness wiring CKTs IB05-YEL and IB06-YEL/BLK and connector terminal contact.

DTC Will Set When:
The combined resistance of the driver air bag assembly, SRS coil assembly, harness wiring CKTs IB05-YEL and IB06-YEL/BLK and connector terminal contact is above a specified value. This test is run once each ignition cycle during the Resistance Measurement Test when:
1. No higher priority faults are detected during Turn-ON
2. Ignition 1 voltage is in the specified value.

Action Taken:
SDM turns ON the AIR BAG warning lamp and sets DTC 22.

DTC Will Clear When:
The ignition switch is turned OFF.

Part 1 Of 2:

Part 2 Of 2:

DTC Chart Test Description:
Number(s) below refer to step number(s) on the diagnostic chart:
2. This test determines whether the malfunction is in the SDM.
3. This test verifies proper connection of the yellow 2-pin connector at the base of the steering column.
4. This test checks for proper operation of the shorting clip in the yellow 2-pin connector.
5. This test isolate the malfunction to one side of the SRS coil assembly yellow 2-pin connector located at the base of steering column.
6. This test determines whether the malfunction is due to shorting in the wiring.
7. This test determines whether the malfunction is in the SRS coil assembly or the driver air bag assembly.

Diagnostic Aids:
An intermittent condition is likely to be caused by a short between CKT IBO5-YEL or IB06-YEL/BLK or a malfunctioning shorting clip on the driver air bag assembly or SRS coil assembly which would require replacement of the component. The test for this diagnostic trouble code is only run while the AIR BAG warning lamp is performing the bulb check, unless DTC 17 or DTC 26 is detected. When a scan tool Clear Codes command is issued and the malfunction is still present, the DTC will not reappear until the next ignition cycle.