17-1 Perform EEC or F420E Quick Test

^ Perform the appropriate Quick Test.

- EEC Quick Test if the MIL is on while driving.

- 4F20E Quick Test if the overdrive off lamp is flashing for eight seconds after starting the engine. See Transmission Control Systems.

^ Are diagnostic trouble codes obtained or are any other conditions noticed?

YES -- Service as necessary.

NO -- Return to the Diagnostic Routine Index and check for other concerns. Diagnostic Routines Index