The ECM has detected a fault in one or more of its systems. Go here,
extreme-check-engine-light-codes.com
and it will explain what to do to extract any codes that are stored.
Come back here with the code(s) and I can try and help further.
Please follow the instructions below and send us the trouble code for repair advice. Along with the code, please let us know if you are experiencing any symptoms.
Fig. Fig. 7: Fault codes are read from the check engine light on most late-model vehicles
Fig. Fig. 8: On Accords, the service connector is located under the dash on the passenger side
Fig. Fig. 10: Fault code chart for 1990-93 Accords
1990-95 FOUR CYLINDER ACCORD AND 1992-95 PRELUDE
See Figures 7, 8, 9, 10, 11 and 12
On
1990-95 Accord (except V-6) and 1992-95 Prelude, the codes are read
from the check engine light after the two-wire service connector has
been jumpered. On Accords, the service connector is under the dash on
the passenger side. On Preludes, it is located behind the center
console. Codes 1 through 9 are indicated by a series of short flashes;
two-digit codes use a long flash for the first digit followed by the
appropriate number of short flashes. For example, Code 14 would be
indicated by 1 long flash followed by 4 short flashes. Codes are
separated by a pause between displays. Multiple codes are transmitted in
an alternating pattern. For example, a code 3 and 14 would be displayed
as 3 short flashes (for Code 3) followed by the separator pause, then 1
long flash and 4 short flashes (for Code 14).
In the event that a code is encountered which is not on the chart,
re-count the number of flashes. If the code is truly wrong, it will be
necessary to swap the ECU for a known-good unit and recheck. Since this
can be expensive, you may wish to bring the car to a reputable repair
facility if no other cause of the failure can be found. This may save
you the expense of purchasing an unnecessary part.
CLEARING CODES
WARNING
Before disconnecting power from the ECU, ALWAYS make sure the
ignition switch is in the OFF position. Failure to do so may result in a
voltage spike damaging the ECU. This can be a very expensive component
to replace.
Stored codes are erased from memory by disconnecting power
to the ECU for at least 30 seconds. Disconnecting the negative battery
cable will clear the memory of the ECU, as well as other solid-state
equipment such as the radio. Keep a record of the station pre-sets and
any applicable security codes. The ECU may also be cleared by pulling
the appropriate fuse from the underhood fuse and relay box. This may be
the BACK-UP, CLOCK or CLOCK/RADIO fuse.
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