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Diagnostic System Check

  1. Turn ignition off. Reconnect all previously disconnected components. Install scan tool. Turn ignition on, with engine off. If scan tool communicates with EBTCM, go to next step. If scan tool does not communicate with EBTCM, see TEST E  under SYMPTOM TESTS.
  2. Road test vehicle for several minutes on several different road surfaces. Perform several turns reaching speed of at least 12 MPH. Using scan tool, display ABS/TCS DTCs. If any current DTCs are set, see DIAGNOSTIC TROUBLE CODE DEFINITIONS  table under RETRIEVING DIAGNOSTIC TROUBLE CODES.. If no current DTCs are set, go to next step.
  3. Remove scan tool. Turn ignition off. Turn ignition on, with engine off. If ABS indicator illuminates for about 3 seconds, and then goes out, go to next step. If ABS indicator does not illuminate, go to step  5 .
  4. Turn ignition off. Turn ignition on, with engine off. If TC indicator illuminates for about 3 seconds, and then goes out, go to step  7 . If TC indicator does not illuminate, go to step  6 .
  5. If ABS indicator remains illuminated, see TEST A  under SYMPTOM TESTS. If ABS indicator does not illuminate, see TEST B  under SYMPTOM TESTS.
  6. If TC indicator remains illuminated, see TEST C  under SYMPTOM TESTS. If TC indicator does not illuminate, see TEST D  under SYMPTOM TESTS.
  7. If any history DTCs are set, go to next step. If no history DTCs are set, system is okay.
  8. Go to appropriate history DTC for diagnosis. See DIAGNOSTIC TROUBLE CODE DEFINITIONS  table under RETRIEVING DIAGNOSTIC TROUBLE CODES. Investigate conditions required for DTC to set. Drive vehicle for several minutes while monitoring scan tool for ABS/TCS DTCs. If history DTC sets as current while driving vehicle, go to appropriate DTC for diagnosis. If history DTC does not set as current while driving, system is okay.
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