Accord L4-2156cc 2.2L SOHC (1991)
If a customer describes the symptoms for codes 3, 6, or 11, yet the D4 indicator light is not blinking, it will be necessary to recreate the symptom by
test driving, and then checking the D4 indicator light with the ignition still ON.
If the D4 indicator light displays codes other than those listed above or stays lit continuously, the control unit is faulty.
Sometimes the D4 indicator light and the Check Engine light may come on simultaneously. If so, check the PGM-FI system according to the number
of blinks on the PGM-FI ECU self-diagnosing indicator, then reset the memory by removing the Back-Up fuse in the under hood fuse/relay box for
more than 10 seconds. Drive the vehicle for several minutes at speed over 30 mph 150 km/h), then recheck the lights.
NOTE: Disconnecting the Back up fuse also cancels the radio preset stations and the clock setting. Make note of the radio presets before removing
the fuse so you can reset them.
