If following fault codes apply:
(019) 13 - Activation, VANOS solenoid valve, outlet
(021) 15 - Activation, VANOS solenoid valve, inlet
(027) 1B - Activation, idle actuator/closing coil
(053) 35 - Activation, idle actuator/opening coil
(068) 44 - Activation, solenoid valve, fuel tank ventilation
(110) 6E - Signal, driver's request sensor, potentiometer1
(112) 70 - Signal, throttle position sensor, potentiometer1
(115) 73 - Reference voltage, voltage regulator 1
(170) AA - Control unit self-test, motor-driven throttle valve or internal fault
(171) AB - System plausibility, motor-driven throttle valve
the control unit should on no account be replaced.
These fault codes are entered in the above list if the system voltage was too low due to battery discharge or due to failure or contact fault of the DME main relay.
The relay is driven by the DME control unit.
Function of main relay:
Voltage supply to all components in the engine electrical/electronic system
Possible effects: - Engine does not run