Reading Diagnostic Trouble Codes

READING CODES

PGM-FI LED Trouble Codes:

A single LED is used to flash codes when ignition is switched "ON." Number of LED blinks corresponds to trouble code numbers. As shown on image, there is a 2 second pause between sets of LED blinks. If more than one failure is detected, LED will display each, then repeat the sequence.

Diagnosis requires digital multimeter and system checker (breakout) harness 07999-PD6000A or equivalent. The harness permits testing ECU pins while leaving main harness connected.