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Home >> Jeep >> 1987 >> Cherokee Limited >> Repair and Diagnosis >> Engine Performance >> System >> 2.5L TBI System >> Component Testing >> Electronic Control Unit Test

Electronic Control Unit Test

  1. If all components have been checked and/or repaired, but a system failure or problem still exists, the ECU may be at fault. However, the ECU is a very reliable unit and must always be the final component replaced if a doubt exists concerning the cause of a system failure.
  2. The only way to confirm an ECU malfunction is to take the unit to an AMC dealer to have it tested. This is the only sure way to avoid replacing a good ECU.
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