166868 - D70 THE CRUISE CONTROL SYSTEM DOES NOT WORK IN ANY CIRCUMSTANCES

The Cruise Control system controls do not work under any circumstances.

STEP	OPERATIONS TO BE CARRIED OUT	TEST RESULTS
1	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket.Check for the presence of faults in the engine management control unit	Move on to Step	1. Error detected in the control unit	1. Continue following the instructions for the diagnostic equipment
2	CRUISE CONTROL SELECTOR CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the Cruise Control ON/OFF contacts are working properly     Continue following the instructions in the test 5580AA Cruise Control ON/OFF control check	Move on to Step	No continuity	Replace the steering column switch unit lever with the Cruise Control incorporated     See in Op. 5580A10 Cruise control LEVER ASSEMBLY - R.R.
3	SUPPLY CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	With the ignition key in the ON position and the Cruise Control ON, check that there is a voltage signal from the Cruise Control to the engine management control unit;Keeping the key in the ON position, check for a voltage signal at the engine management control unit coming from the brake pedal switch (Wiring Diagram ) E5060 CRUISE CONTROL	Move on to Step	1. No voltage from the Cruise Control	Move on to Step
			2. No voltage from the brake pedal switch	Move on to Step
4	CONNECTIONS CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the electrical continuity of the wiring between the ignition switch, junction unit, Cruise Control and engine management control unit (Wiring Diagram ) E5060 CRUISE CONTROL	Move on to Step	No continuity	Renew the connections (Wiring Diagram ) E5060 CRUISE CONTROL
5	CONNECTIONS CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	check the condition of the brake pedal switch check the electrical continuity of the wiring between the ignition switch, junction unit, brake pedal switch and engine management control unit	Move on to Step	1. Brake switch faulty	1. Replace the brake pedal switch     See in Op. 5550D10 brake light switch - r+r
			2. No continuity	2. Renew the connections (Wiring Diagram ) E5060 CRUISE CONTROL
6	CHECK ON CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
2.4 20 V,2.0 TB,3.0 V6	Check that the fault is no longer present		Fault persists control unit defective	Replace the engine management control unit     See in Op. 1056B82 Injection/ignition system CONTROL UNIT (one) - R.R.
6	CHECK ON CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
2.4 JTD 10V	Check that the fault is no longer present		Fault persists control unit defective	Replace the engine management control unit     See in Op. 1060G80 Diesel electronic injection system CONTROL UNIT - R.R.