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Diagnosis & Testing: Notes

NOTE: The following paragraphs explain the procedures involved in performing the preceding steps.

The ECM stores component failure information for the Closed Loop Emission Control system under a related trouble code which can be recalled for diagnosis and repair. When recalled, these codes will be displayed by flashes of the "CHECK ENGINE" lamp. For example: "FLASH", "FLASH", pause, "FLASH", "FLASH", "FLASH" followed by a longer pause identifies trouble code "23". First series of flashes indicates first digit of code; second series of flashes indicates second digit. Codes are displayed starting with lowest numbered code. Only codes in which a related malfunction has occurred will be displayed.

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