For 1990-2009 cars only
Important: The following steps must be completed before using the symptom diagnostic tables.
- Before using the symptom diagnostic tables, perform the Diagnostic System Check - Cruise Control in order to verify the following conditions:
- Review the system operation in order to understand the system functions. Refer to Cruise Control Description and Operation .
| • | There are not any DTCs set. |
| • | The control modules can communicate via the serial data link. |
Visual/Physical Inspection
| • | Inspect for aftermarket devices which could affect the operation of the cruise control system. Refer to Checking Aftermarket Accessories in Wiring Systems. |
| • | Inspect the easily accessible or visible system components for obvious damage or for conditions which could cause the symptom. |
Intermittent
Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
Symptom List
Refer to one of the following symptom diagnostic procedures in order to diagnose the symptom:
| • | For all caterpillar engines refer to the Caterpillar Diagnostic Information. |
