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Home >> Acura >> 1991 >> Integra LS, 2D Hatchback, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Self-Diagnostic System >> Retrieving Codes

Retrieving Codes

Locate ECU under carpet on passenger's footwell, and check for trouble codes. Observe red LED on top of ECU. LED indicates a system failure code by number of blinks.

Red LED indicates component problems with a blinking series of codes. Trouble codes 1-9 are indicated by individual short blinks. Codes 10-59 are indicated by a series of long and short blinks. One long blink equals 10 short blinks. Add long and short blinks together to determine trouble code.

If codes other than those listed are indicated, substitute a known good ECU, and recheck. If codes do not reappear, replace ECU. CHECK ENGINE light and red LED may come on indicating a system problem due to a poor or intermittent connection. Check all related connections, and repair as necessary. Whenever CHECK ENGINE light comes on and red LED stays on steadily, replace ECU.

NOTE: Before starting tests, ensure engine is in good mechanical condition and adjusted to specifications.
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