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Home >> Mercedes Benz >> 2001 >> ML430 >> Repair and Diagnosis >> Engine Performance >> Tune-Up >> Mixture Formation - 163 Chassis (3 Of 4) >> Self-Diagnostic System >> Fault code description - ME-SFI - gear comparison (multiple times) negative - AD07.61-P-4000-33A

Fault code description - ME-SFI - gear comparison (multiple times) negative - AD07.61-P-4000-33A

1 Fault code P0730
2 Fault storage after the end of the test period and faults
Activation of malfunction indicator lamp for engine diagnosis (EURO3/4)
or CHECK ENGINE (MIL) USA ONLY
after two successive driving cycles with faults
3 Frequency of the test continuous
4 Fault setting conditions  Comparison of detected gear and engaged gear (calculated gear ratio) negative at least 6x
5 Test prerequisites
  • 2nd, 3rd, 4th or 5th gear detected
  • engine speed > 450 rpm
  • output shaft rotational speed > 180 rpm
  • no shift operation
6 IMPORTANT The gear ratios are calculated from the following variables: speed signal n2, speed signal n3 and output shaft rotational speed (determined via rear wheel speed).
Faults are detected by the ETC control module and sent via the CAN data bus to the ME-SFI control module. The faults are stored and the malfunction indicator lamp is activated by the ME-SFI control module. Also read out ETC diagnostic trouble code memory, fault code 55.