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Home >> Mercedes Benz >> 2004 >> SL500 >> Repair and Diagnosis >> Engine Performance >> Tune-Up >> Fuel & Ignition -- Self-Diagnostic System -- 230 Chassis >> Self-Diagnostic System >> Gasoline injection and ignition system (ME-SFI) diagnosis - diagnostic trouble code memory - AD07.61-P-4000 >> ME-SFI fuel injection and ignition system (ME), DTC memory - AD07.61-P-4000M >> Idle speed control, ME-SFI fault code description - AD07.61-P-4000-24M

Idle speed control, ME-SFI fault code description - AD07.61-P-4000-24M

    Increased idle speed due to SBC low-voltage
1 Fault code P2074 (-)
  (Fault code according to OBD)  
2 Fault storage After expiry of test duration and fault
  Actuation of engine diagnosis indicator lamp (EURO4) or CHECK ENGINE (MIL) USA ONLY No actuation
3 Checking frequency Continuous
4 Checked signal or status If the SBC control unit recognizes an undervoltage it will send the request for idle speed increase to the engine control unit via the CAN. The idle speed will then be increased for the engaged drive position to about 750 RPM. This stabilizes the vehicle electrical system voltage which is necessary to ensure safe Sensotronic Brake Control mode.
5 IMPORTANT For information only.
Also read out the SBC control unit fault memory.
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