Control units (Description): Description and operation

Description

Central Control Unit (CCU)

The CCU is plugged into the back of the passenger compartment fusebox below the fascia. Two connectors provide the interface between the CCU and the passenger compartment fusebox and three connectors provide the interface between the main harness and the CCU. The CCU is responsible for controlling the following functions: l Transit mode. l Anti theft alarm. l Windscreen wipers. l Courtesy lamp delay. l Door open warning lamp. l Key in alarm. l Rear fog guard lamps. l Lights on alarm. l Seat belt warning. l Handbrake warning. l Rear screen wiper. l Tail door window. l Heated rear window. l Heated windscreen. l Tail door latch. l Window lift. l Seat heating. l Daytime running lamps.

Some of the features controlled by the CCU are market selectable and may not be operative or available in specific markets. TestBook can be used to configure the CCU to enable/disable market selectable features, tailor anti theft alarm features to customer requirements and can also interrogate the CCU for stored fault codes and alarm triggers. TestBook is connected to the CCU via the diagnostic socket which is located in the passenger footwell.

Transit Mode The transit mode feature is to minimise battery usage when the vehicle is being stored or transported prior to sale. When the CCU is programmed in the transit mode, the following functions are disabled: l RF receiver. l Tail door actuator. l Tail door window. l Central Door Locking (CDL). l Interior lamps.

If the ignition is switched to position II, the CCU buzzer will sound an alarm to warn that the vehicle is in transit mode. The dealer can remove the transit mode feature and programme the CCU to the applicable market specification at the Pre Delivery Inspection (PDI) using TestBook/T4.

Anti Theft Alarm System The CCU controls the Central Door Locking (CDL) and the alarm system for the vehicle. These are integrated into the vehicle security system, which also includes engine immobilisation. SECURITY, DESCRIPTION AND OPERATION, Description.

Windscreen Wipers The CCU controls the intermittent wipe and programmed wash/wipe of the windscreen wipers. WIPERS AND WASHERS, DESCRIPTION AND OPERATION, Description.

Courtesy Lamp Delay The CCU controls the delay function of the interior courtesy lamp. The courtesy lamp can also be switched on using a manual switch on the lamp unit.