Diagnostic Starting Point - Automatic Level Control (ALC)

Diagnostic Starting Point - Automatic Level Control
Begin the system diagnosis with the Diagnostic System Check - Automatic Level Control (w/F45) or Diagnostic System Check - Automatic Level Control (wo/F45).

NOTE: RPO F45 Chassis Continuous Valve Real Time Damping

The Diagnostic System Check will provide the following information: With RPO F45 Without RPO F45
^ The identification of the control module(s) which command the system.
^ The ability of the control module(s) to communicate through the serial data circuit.
^ The identification of any stored diagnostic trouble codes (DTCs) and their status.
The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located.