Start the engine four times in succession. If the fault code is still active, the SCR control unit should be renewed; this means that the main unit must be renewed.In order for the control unit to verify that the fault has been rectified, it must carry out a test sequence. When the control unit has carried out the entire test sequence without detecting a fault, the fault becomes inactive.The control unit must carry out the test in four successive cycles, this means that the engine must be started four times in succession.You can click on fault code monitoring and look at the fault code. There you can see whether the conditions under which the control unit verifies that the fault is rectified have been met. When the conditions have been met and the test is carried out, the fault code status is displayed during the test. If the fault code is pending, the control unit has detected a fault. If the fault has been rectified, the fault code becomes inactive. Clear the fault code.Switch the power off and on with the starter key three times in succession at 10 second intervals to extinguish the warning lamp.

Diagnostic depth