Step 1: Check The Vehicle Speed Sensor
CAUTION:
To prevent damage to scan tool MB991502 or MB991958, always turn the ignition switch to "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502 or MB991958.
- Connect scan tool MB991502 or MB991958 to the data link connector.
- Turn the ignition switch to "ON" position.
- Read the MFI system diagnostic trouble code.
Is MFI system DTC P0300 output?
- YES
See SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. - NO
Go to step 2 .