If the complete throttle valve control module is current-less (e.g. connector disconnected) the throttle valve moves into a particular, specified mechanical position, which signals an increased idle speed with an engine at operating temperature. If only the Throttle Position (TP) actuator -V60- is current-less, the throttle valve also moves into the specified mechanical position (emergency running gap), however, since Closed Throttle Position (CTP) switch -F60- can still be recognized, an “almost normal” is reached via the respective ignition angle retardation. If the Engine Control Module (ECM) detects a malfunction at Throttle Position (TP) sensor -G69-, Throttle Position (TP) actuator -V60- is switched current-less by the Engine Control Module (ECM) and the throttle valve moves into the specified mechanical position (emergency running gap) again.
● The respective fuses of Motronic Engine Control Module (ECM) -J220- must be OK: => Electrical Wiring Diagrams, Troubleshooting & Component Locations
● Battery voltage must be at least 11.5 volts.
● All electrical consumers such as, lights and rear window defroster must be switched off.
● Parking brake must be engaged or else daylight driving lights will be switched on.
● If vehicle is equipped with an A/C system, it must be switched off.
● Ground (GND) connections between engine and chassis must be OK.
● Throttle valve must not be damaged or dirty.
● Throttle valve must be in Closed Throttle Position (CTP).
● Adjustment of accelerator pedal cable must be OK

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