Initial Inspection and Diagnostic Overview

The Central Control Module (CCM) utilizes the speedometer, odometer, and the trip monitor located on the instrument cluster to display information while in the diagnostic mode.

CCM Diagnostic Mode:

Driver Information Center Buttons:

The speedometer is used to display fault codes (CCM, ABS/ASR and ECM), the odometer displays data, and the trip monitor indicates the system being tested and the test which is being performed. The buttons on the Driver Information Center (DIC) are used to send instructions to the CCM when in the diagnostic mode.

Unlike other vehicle electronic systems, such as ECM, SIR, etc., there is no specific "CCM" lamp to indicate a fault. A code-setting fault in any of the CCM-monitored systems is indicated by "SYS" (SYSTEM ERROR) flashing in the instrument cluster trip monitor. If a fault does not recur within 100 ignition cycles the CCM will automatically clear the code.

The "SYS" indicator will flash 3 times every 15 seconds while a current-code fault is present. An exception to the "SYS" fault indicator is that PASS-Key(R) faults (Codes 51-53) will be indicated by the "SECURITY" lamp being illuminated without the "SYS" indicator flashing. If there is a Fuel Enable Data Stream (FEDS) failure (Code 54), the "SECURITY" indicator and "SYS" indicator will flash together, to illustrate that the problem condition affects vehicle security.