When the Check Engine warning light has been reported on, turn the ignition on, move the front passenger seat to the rear position and observe the LED on the front of the ECU. The LED indicates a system failure code by blinking frequency. The ECU LED can indicate any number of simultaneous component problems by blinking separate codes, one after another.
If output indicates CODE 4, 11, 15, 16 or exceeds 17, count the number of blinks again. If the indicator is in fact, blinking these codes, substitute a known-good ECU and recheck If the indication goes away, replace the original ECU.
Diagnostic Trouble Codes - 1994
1 Primary Oxygen Sensor (HO2S).
3 Manifold Absolute Pressure Sensor (MAP).
4 Crankshaft Position Sensor (CKP).
6 Engine Coolant Temperature (ECT Sensor).
7 Throttle Position Sensor.
8 Top Dead Center Position Sensor (TDC).
9 No. 1 Cylinder Position Sensor (CYP).
10 Intake Air Temperature (IAT) Sensor.
13 Barometric Pressure (BARO) Sensor.
14 Idle Air Control (IAC) Valve.
15 Ignition Output Signal.
16 Fuel injector.
17 Vehicle Speed Sensor (VSS).
20 Electric load detector.
21 VTEC Solenoid Valve.
22 VTEC Pressure switch.
30 A/T FI signal A.
31 A/T FI signal B.
41 Oxygen sensor heater.
43 Fuel supply system.
Saturday, July 11th, 2009 AT 11:40 AM