Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Symptom Related Diagnostic Procedures

PROCEDURE
Connect a Scan Tool to the ALDL Connector. Drive the vehicle; observe the Speedometer and compare it to the vehicle speed shown on the Scan Tool.
^ If both the Speedometer and Scan Tool display approximately the same speed, check for correct tire size, ECM CALPAK and Vehicle Speed Sensor.
^ If the Scan Tool and the Speedometer do not display the same speed, replace the Instrument Cluster.