Trouble Code Read
- Code Reader
Step 1 - When a check engine or service engine soon light illuminates the computer system has detected a malfunction which indicates a repair is needed.
Check Engine Light
Trouble Code Reader Step 3 - Next, locate the ALDL data link connector which is usually under the dash on the drivers side, attach the reader data connector.
Reader Connector Step 4 - With the data connector in place, turn the ignition key to the "ON" position. (Note: Do not start the engine.)
Ignition Key "ON"