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    Mercedes C200 1996 WDB202020 Idle fault. Archived Message

    Posted by Peter Holland on June 30, 2008, 1:05 pm

    Car came in stalling, checked fault codes etc.

    Code 18 Driver/Throttle valve actual value potentiometer too low. Current

    Code 41 Injector cylinder 3 short to pos stored. (Runs fine and no misfire)

    Code 22 Cruise control actuator reports limp home mode (No cruise fitted) Current

    Code 19 Throttle Pot intermittent contact. Stored

    Code 64 Input signal DAS open circ or short to pos

    Checked throttle body resistances and voltages etc at ECU, but I've got nothing to compare it with. Autodata has nothing either.

    Sent Throttle body away for testing and the report back said it was faulty. £200 + VAT later, unit returned looking exactly the same, but with some nice sticky labels on it! Resistances etc all exactly the same, but now the car idles at 1500 RPM in neutral and AC switched off, but it doesn't stall though

    Oh, and the fault codes are all the same.

    Has anyone got any info on how to test these accurately, resistance values, voltage from TPS etc?

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