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Home >> Oldsmobile >> 1990 >> Toronado Base, 4T60/ME9 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - ECM >> Entering Self-Diagnostics >> Displaying Trouble Codes

Displaying Trouble Codes

  1. The Electronic Control Module (ECM), Body Control Module (BCM), and Supplemental Inflatable Restraint (SIR) trouble codes automatically display after system enters self-diagnostics. ECM trouble codes are displayed first, followed by the BCM trouble codes and then SIR trouble codes.
  2. All trouble codes appear in an ascending (3 digit) numerical order. ECM codes are prefixed with the letter "E", BCM Codes prefixed with the letter "B", and SIR codes prefixed with the letter "R".
  3. In addition, all trouble codes are followed by the letter "C" or "H". Letter "C" stands for current and indicates a trouble code related fault presently exists. Letter "H" stands for history and indicates the system failure was not present the last time the code was accessed.
  4. For example: code E016H is ECM trouble code number 016, set in response to a malfunction that occurred in the past (history). Code B410C is BCM trouble code number 410, set in response to a malfunction that is currently taking place.
  5. If no ECM, BCM or SIR trouble codes are stored in memory, respectively, a NO E CODE, NO B CODE or NO R CODE message is displayed. Should the communication link between a component and the ECM or BCM fail, a NO ECM/BCM DATA message will be displayed.
  6. Trouble code display can be by-passed at any time by pressing FAN DOWN button on EECP (Touch RTN key on CRT monitor).
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