Cruise Control Component Location 1 Diagnostic socket 2 Instrument pack 3 Cruise control switch pack 4 Main fuse 5 ABS/DSC ECU 6 Brake light switch 7 Accelerator pedal position sensor (APP) 8 Electric throttle. 9 EMS ECU
ENGINE MANAGEMENT SYSTEM – V8 DESCRIPTION AND OPERATION 18-2-51 Cruise Control System Control Diagram A = Hardwired connections D = CAN bus J = ISO 9141 Kline bus K = I bus M18 0817A K A 1 2 3 4 6 7 9 8 10 12 13 11 J J D 5
ENGINE MANAGEMENT SYSTEM – V 18-2-52 DESCRIPTION AND OPERATION 1 Main fuse 2 Cruise control switch pack 3 Rotary coupler 4 Instrument pack 5 EAT ECU 6 ABS/DSC ECU 7 Brake light switch 8 Diagnostic socket 9 Electric throttle 10 Accelerator pedal position sensor (APP) 11 ECM 12 Fuse 9, switch supply (5 amp) 13 Ignition switch
ENGINE MANAGEMENT SYSTEM – V8 DESCRIPTION AND OPERATION 18-2-53 Cruise Control General Cruise control functionality is fully integrated into the ECM and uses electric throttle intervention to automatically maintain a set vehicle speed. Once engaged, the system can also be used to accelerate the vehicle without using the accelerator pedal. The cruise control system consists of: l Cruise control master switch l- Speed switch l Resume switch l EMS ECU l Electric throttle. The Controller Area Network (CAN) bus is used by the cruise control system for the exchange of data between the ECM, EAT ECU, DSC ECU and instrument pack. Cruise control is enabled when the master switch is pressed. Once enabled, the cruise control system is operated using the steering wheel switches. The steering wheel switches output a serial data stream to the ECM, the ECM then adjusts the electric throttle to maintain the vehicle at the set speed. The cruise control warning lamp provides a visual indication of when the system is engaged. Master Switch The master switch controls a feed to the ECM to enable the system. The switch is a momentary contact push switch on the left hand steering wheel switch pack.