23 · Diagnostics

Engine can message error

Fault diagnosisEngine can message error

ENGINE CAN MESSAGE ERROR

The diagnostic equipment signals the following errors: "C1101 - Engine CAN Messages Error" and "U1701 - Engine management node missing error"

error C1101 is signalled if the brake control unit detects invalid messages from the Engine Management control unit.

Error U1701 is signalled if the control unit does not detect the Engine Management control unit.

2	CHECK ACCELERATOR PEDAL POTENTIOMETER	All OK	Problems encountered	Operation
	Using the Examiner, check that the accelerator pedal potentiometer is working properly See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT	Move on to Step 3 1	One of the potentiometers is not operating correctly	Replace the accelerator pedal Op. 1068A20 ACCELERATOR PEDAL WITH BUILT-IN POTENTIOMETER - R R Move on to Step 3 1
3	CHECK THE CAN NETWORK ELECTRICAL CONNECTIONS	All OK	Problems encountered	Operation
	Check that the connection between the engine management control unit and the ABS control unit is correct See E7030 AIRBAG See Test 5505OA CAN LINE C CHECK	Move on to Step 4 1	CAN electrical connections faulty	Restore the correct connection
4	CHECK ON CORRECT OPERATION	All OK	Problems encountered	Operation
	Clear the errors using the Examiner Carry out a road test See Test 3350EA ESP SYSTEM ACTUATION CHECK to ensure that the control unit checks whether there are any errors still present. Return to the workshop and check that the fault is no longer present using the diagnostic equipment	End of diagnosis

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