Steering Angle Sensor: Testing and Inspection

1. Disconnect AAS control unit electrical connector, then place ignition switch in On position.

Fig. 22 Angle sensor circuit test. 1986-87:

2. Connect suitable ohmmeter to terminals A and D, Fig. 22. With steering wheel in neutral position, meter should indicate approximately 25k ohms. Gradually turn steering wheel 180° clockwise, meter should increase from 25k ohms to 50k ohms. Turn steering wheel back to neutral position, then gradually turn wheel 180° counterclockwise, meter should increase from 25k ohms to 50k ohms.
3. Connect ohmmeter to terminals C and D, Fig. 22. With steering wheel in neutral position, meter should indicate 50k ohms.
4. If resistance is not as specified in steps 2 and 3, check for broken wire in harness, repair as required.
5. Remove steering column cover, then disconnect angle sensor electrical connector

Fig. 23 Angle sensor component test. 1986-87:

6. Connect suitable ohmmeter to terminals B and C, Fig. 23. With steering wheel in neutral position, meter should indicate approximately 25k ohms. Gradually turn steering wheel 180° clockwise, meter should increase from 25k ohms to 50k ohms. Turn steering wheel back to neutral position, then gradually turn wheel 180° counterclockwise, meter should increase from 25k ohms to 200k ohms.
7. Connect ohmmeter to terminals A and C, Fig. 23. With steering wheel in neutral position, meter should indicate 50k ohms.
8. If resistance is not as specified in steps 6 and 7, place steering wheel in neutral position, then align angle sensor matching marks.