ECU Codes.

Depending on which year your Teg is, there are two different ways to check your ECU code.

1990 and 1991 Tegs:

Your ECU is located under the carpet on the passenger side of the car. You have to pull back on the carpet to expose the ECU which is brass in color. There is a circular window on the face of it with red LED in it. This LED will blink and this is where you read your code.

To get the LED to blink, you must turn the car to the "ON" position but do not start it. The LED will blink with slow blinks and with fast blinks. If you have four slow and two fast, that is code 42.

1992 and 1993 Tegs:

Your ECU is located in the same spot as 90-91's but you won't be reading the code off the ECU. For you, you must jump a connector and then your Check Engine light will blink to tell you the code.

The connector you must jump is located under the glove box and should be green in color. How to jump -- Helms: Chapter 11 page 40

0 - ECU

1 - Oxygen Sensor

3 - MAP Sensor

5 - MAP Sensor

6 - Crank Angle

7 - Throttle Angle

8 - TDC Position

9 - No. 1 Cylinder Position

10 - Intake Air Temperature

12 - Exhaust Gas Recirculation (EGR) System

13 - Atmosphere Pressure

14 - Electronic Air Control

15 - Ignition Output Signal

16 - Fuel Injector

17 - Vehicle Speed Sensor

20 - Electronic Load Detector

22 - VTEC System Malfunction

23 - Knock Sensor

41 - O2 Sensor

43 - Fuel Supply System

45 - System Too Rich or Too Lean

48 - Primarry Heated O2 Sensor

54 - Crankshaft Speed Fluctuation Sensor

61 - Primary O2 Sensor Circuit

63 - Secondary O2 Sensor Circuit

67 - Catalyst System

70 - Automatic Transaxle

71-74 - Random Misfire

80 - Exhaust Gas Recirculation

86 - Engine Coolant Temperature Circuit

90 - Evaporative Emission Control System Leak Detected

91 - Fuel Tank Pressure Circuit

92 - Evaporative Emission Control System Insufficient

NOTE: Some trouble codes are not listed for certain models and some codes only apply to California cars.