Retrieving Codes
Locate ECU and check for trouble codes. See ELECTRONIC CONTROL UNIT (ECU) LOCATION table. Turn ignition on and observe Red LED on top of ECU. LED indicates a system failure code by number of blinks.
The LED indicates component problems with a blinking series of codes. Trouble codes 1-9 are indicated by individual short blinks. Codes 10-43 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 original ECU. It is possible for CHECK ENGINE light and Red LED to come on indicating a system problem, when in fact there is a poor or intermittent connection. Check all related connections and repair as necessary. Whenever CHECK ENGINE light comes on and Red LED stays on steady, replace ECU.
| Application | Location |
|---|---|
| Integra | Below Carpet Under Passenger's Side of Dash |
| Code | System Affected | Probable Cause | ||
|---|---|---|---|---|
| 0 | ECU | No Signal to ECU | ||
| 1 | Oxygen Sensor | O2 Sensor Circuit Problem | ||
| 2 | Oxygen Sensor | O2 Sensor Circuit Problem | ||
| 3 | MAP Sensor | MAP Sensor Problem | ||
| 4 | Crank Angle | Open/Shorted Signal Circuit | ||
| 5 | Map Sensor | Open/Shorted Signal Circuit | ||
| 6 | Coolant Temp. Sensor | Open/Shorted Signal Circuit | ||
| 7 | Throttle Angle Sensor | Open/Shorted Signal Circuit | ||
| 8 | Crank Angle Sensor (TDC) | Open/Shorted Signal Circuit | ||
| 9 | Crank Angle Sensor (CYL) | Open/Shorted Signal Circuit | ||
| 10 | Intake Air Temperature | Problem With Sensor | ||
| 12 | EGR System | Faulty EGR Valve | ||
| 13 | Atmospheric Press. (PA) | PA Circuit Problem | ||
| 14 | Elec. Air Control Valve (EACV) | Open/Shorted Signal Circuit | ||
| 15 | Ignition Output Signal | Open/Shorted Signal Circuit | ||
| 16 | Fuel Injector | Open/Shorted Signal Circuit | ||
| 17 | Vehicle Speed Sensor | Open/Shorted Signal Circuit | ||
| 43 | Fuel Supply System | Open/Shorted O2 Circuit | ||
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