Without Scan Tool

HOW TO READ AND ERASE DIAGNOSTIC TROUBLE CODES (When using the ACD mode indicator light)
Required Special Tool:
^ MB991529: Diagnostic Trouble Code Check Harness





1. Use special tool MB991529 to ground terminal number 1 of the data link connector.
2. Turn on the ignition switch to the ON position.





3. Read the diagnostic trouble codes by counting ACD mode indicator light flashes.
4. Refer to Diagnostic Trouble Codes Chart. Diagnostic Trouble Code Descriptions
5. Erase the diagnostic trouble codes by the following procedure.
1) Turn the ignition switch to the LOCK (OFF) position.
2) Disconnect the negative battery cable for 10 seconds or more. Reconnect the cable.
3) Turn the ignition switch to the ON position. Read the diagnostic trouble code output and check that no diagnostic trouble code is set.
4) Start the engine and let it run until the engine has warmed up. Run it at idle for approximately 10 minutes or longer. The engine control module must build up the adaptive memory for smooth idle and good performance.

UNDERSTANDING THE ACD MODE INDICATOR LIGHT FLASHES: