Auto Test Diagnostics

AUTO TEST
At the beginning of the automatic portion of the test the control module checks for damaged control module (DTC 70), for unstable battery voltage (DTC 80), then for shorted or open conditions that would create DTCs 39 through 46, and 68 through 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 control module attempts to raise and lower the vehicle to verify that all three air suspension height sensor states (trim, high, and 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.

MANUAL INPUT TEST
After DTC 12 (or DTC 13) is displayed, the control module is ready to check for manual inputs. The manual inputs check the steering sensor and the door courtesy lamp switch circuits. During the manual test, the control module continually monitors the door Circuit 344 (BK/Y) and the steering sensor Circuits 633 (R) and 634 (BR) for activity. To pass the manual test the control module must detect that all four doors have been opened and closed, and that the steering wheel has been turned at least one quarter turn in each direction. After the manual test, the Star tester button must be toggled or the control module will continue to monitor the manual test inputs indefinitely. Either a DTC 11 (Air Suspension OK) or other DTCs will be displayed at this time.

TEST OUTPUT
After the Auto/Manual 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 the Star test button is released (up). Write down all DTCs, then release pressed tester button. DO NOT disconnect or turn OFF the tester. The tester is ready to enter the Functional Test if a DTC 11 has been displayed.