Auto Test Diagnostics

At the beginning of the automatic portion of the test, the air suspension control module checks for damaged air suspension control module (DTC 70), for unstable battery voltage (DTC 80), then for shorted or open conditions that would create DTC 39 through DTC 46, and DTC 68 through DTC 71. If shorts or opens are detected, the automatic portion of the test is ended and a DTC 13 (auto test failed) will be displayed on the Super Star II Tester. If no shorts or opens are detected, the automatic portion of the test continues. The air suspension control module attempts to raise and lower the vehicle to verify that all three air suspension height sensor states (trim, high, low) can be reached. A properly functioning vehicle will be at trim height at the end of the Auto Test. If all three states are not reached, the Auto Test will end and again a DTC 13 will be displayed. A DTC 12 will be displayed at the end of the Auto Test only if everything checked to this point is functional.

After DTC 12 (or DTC 13) is displayed, the air suspension control module is ready to check for manual inputs. The manual inputs check the steering sensor and door courtesy lamp switch circuits. During the manual test, the air suspension control module continually monitors the door and steering sensor circuits for activity. To pass the manual test, the air suspension control module must detect that four doors have been opened and closed, and the steering wheel has been turned at least one quarter turn in each direction. After the manual test, the Super Star II Tester button must be toggled or the air suspension control module will continue to monitor the manual input tests indefinitely. Either a DTC 11 (air suspension OK) or other DTCs will be displayed at this time.

After the auto and manual input tests, the DTCs will be displayed automatically. Each DTC detected will be displayed for about 15 seconds. The code display will continue until all DTCs have been displayed. The display will repeat the DTC until Super Star II Tester button is released (up). Document all DTCs, then release the depressed Super Star II Tester button. Do not disconnect or turn OFF the Super Star II Tester. The Super Star II Tester is ready to enter the Function Test if a DTC 11 has been displayed.