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Home >> Dodge and Ram >> 1987 >> Lancer Base, 2.2 D, Standard >> Repair and Diagnosis >> Engine Performance >> System >> 4-CYL EFI System >> Testing >> Entering On-Board Diagnosis >> Diagnostic Mode

Diagnostic Mode

  1. Attach the Chrysler Diagnostic Readout Box (C-4805) to self-test connector. The connector is located in the engine compartment near the right side strut tower. If diagnostic readout box is not available, codes may be read off of the Power Loss Light.
  2. Start engine (if possible). Move transmission shift lever through all positions, ending in Park. Turn A/C switch on, then off (if equipped).
  3. Stop the engine and, without starting it again, turn key on, off, on, off and on. Record 2-digit trouble codes as displayed on readout box or by counting flashes of the Power Loss Light.
  4. The 2-digit codes displayed by the Power Loss Light are indicated by a series of flashes. For example, code 23 is displayed as flash, flash, 4-second pause, flash, flash, flash. After a slightly longer pause, any other codes stored are displayed in numerical order. Once the light begins to display trouble codes, it cannot be stopped. If you lose count, it will be necessary to start over with step 2).
  5. Unlike the readout box, the Power Loss Light can't display any codes related to Code 88 diagnosis, show you if oxygen feedback system is switching (lean-rich) or perform actuation test mode.
  6. The setting of a specific trouble code is the result of a particular system failure, NOT the reason for that failure, such as failure of a specific component. Therefore, the existence of a particular code denotes the probable area of the malfunction, not necessarily the failed component itself.
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