Defect Code 52
Defect code 52:•D• 900 Defect code memory: 52 Idle switch:
Explanation: This defect code is stored when the throttle switch or the wire to the DME control unit Pin 52 has a short to ground (corresponds to a closed idle contact). A prerequisite for this is that the engine is at operating temperature ( > 80° C) at an engine speed> 1200 rpm and a load signal > 3.5 ms.
Troubleshooting: As displayed on screen. For test procedure, refer to - Component Testing -.
Idle/Full Load Signal