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Error U1701 is signalled if the control unit does not detect the Engine Management control unit. |
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Test results |
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1 |
CHECKS USING DIAGNOSTIC EQUIPMENT |
All OK |
Problems encountered |
Operation |
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Connect the diagnostic equipment and check that the accelerator pedal potentiometers are working properly |
Move on to Step 2 |
One of the potentiometers is not operating correctly |
Replace the accelerator pedal Op. 1068A20 ACCELERATOR PEDAL WITH BUILT-IN POTENTIOMETER - R.R |
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2 |
ENGINE MANAGEMENT CONTROL UNIT POWER SUPPLY CHECK |
All OK |
Problems encountered |
Operation |
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Check that the engine control unit is correctly powered (see wiring diagram of the corresponding vehicle and engine version) |
Move on to Step 3 |
Engine management control unit power supply missing |
Restore the correct connections |
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3 |
ELECTRICAL CONNECTIONS CHECK |
All OK |
Problems encountered |
Operation |
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Check that the connection between the engine management control unit and the climate control unit is correct |
Move on to Step 4 |
CAN electrical connections faulty |
Restore the correct connection. |
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4 |
CORRECT OPERATION CHECK |
All OK |
Problems encountered |
Operation |
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Delete the errors using the diagnostic equipment. |
End of diagnosis |
The fault persists |
Move on to Step 1 |
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