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Home >> Audi >> 2004 >> TT Base, 2D Convertible >> Repair and Diagnosis (Single Page) >> Drivelines & Axles >> Differentials & Drive Axles >> HALDEX Clutch Service & Repair >> Self-Diagnostic System >> Function Mode 03 - Output Diagnosis Test >> Output Diagnostic Test Mode Testing
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Output Diagnostic Test Mode Testing

  1. Turn ignition off. Connect scan tool. See INITIATING ON-BOARD DIAGNOSTICS  . On scan tool, press "0" and "3" to select function mode 03 - OUTPUT DIAGNOSTIC TEST MODE (DTM). Press "Q" button to confirm input.
  2. With output DTM initiated, Haldex clutch pump (V181) should be off (pump not activated; scan tool displays PRIMING PUMP OFF). On scan tool, press "forward arrow" button. Haldex clutch pump (V181) must start up. If pump does not run, perform TEST STEP 5  under ELECTRICAL TEST.
  3. If scan tool displays ALL WHEEL DRIVE CLUTCH DISENGAGED, engage parking brake. Operate clutch pedal and engage 1st gear. Start driving slowly, only front wheels must turn (vehicle raised enough that wheels can turn freely). If wheels do not turn, perform TEST STEP 5  under ELECTRICAL TEST. If wheels do turn and scan tool displays ALL WHEEL DRIVE CLUTCH ENGAGED, go to next step.
  4. Operate clutch pedal. On scan tool, press "forward arrow" button. Begin driving slowly again in 1st gear with parking brake engaged, rear wheels must noticeably push against parking brake (this may cause engine to stall). If rear wheels do not push against parking brake, perform TEST STEP 5  under ELECTRICAL TEST. If rear wheels do push against parking brake, press "forward arrow", Haldex clutch priming pump should stop running. Press "forward arrow" to end output DTM. Press "0" and "6" to end output. See FUNCTION MODE 06 - ENDING OUTPUT  .
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