Description & Operation

WARNING: Vehicle is equipped with air bag supplemental restraint system. Before attempting ANY repairs involving steering column, instrument panel or related components, see SERVICE PRECAUTIONS and DISABLING & ACTIVATING AIR BAG SYSTEM in AIR BAG RESTRAINT SYSTEM article.

The Central Control Module (CCM) performs the following functions: courtesy light control, retained accessory power, variable effort steering, illuminated entry, delayed interior lights, daytime running lights, Personalized Automotive Security System (PASS-Key II(R)), and twilight sentinel.

Signals that activate the CCM are known as "wake-up" signals. CCM is asleep when it is not controlling or monitoring the following wake-up functions: courtesy light system, remote keyless entry system, front door handles and rear door (mini wedge switches), ignition on (IGN 3), parking lights, and headlights. When CCM is awake and wake-up signal is removed, after 10 minutes, CCM will return to sleep. If CCM receives a door ajar wake-up signal and wake-up remains active after 10 minutes, CCM will turn off courtesy light (if illuminated) to prevent battery drain.

CCM battery terminals operating current should not exceed one amp while CCM is awake. An approximate normal value is 200 milliamps. If retained accessory power is active, amperage may be higher. Retained accessory power allows operation of power windows, sun roof, trunk lid, radio, and windshield wipers until a door is opened or 10 minutes has elapsed. When CCM is asleep, current should not exceed 6 milliamps. CCM will go to sleep after ignition is turned off and 10 minutes has elapsed. CCM IGN 1 and IGN 3 terminals operating current should not exceed 700 milliamps. Most CCM functions will properly operate with a system voltage of 9-16 volts.