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Home >> Mercedes Benz >> 1997 >> E320 >> Repair and Diagnosis >> Steering >> Electronic Steering >> Electronic Power Steering - 129, 140 & 210 Chassis >> Description & Operation >> PML Electronic Control Unit >> Fault Memory

Fault Memory

NOTE: If during the fault retrieval, "-" is displayed, no fault is output, the electrical system of the PML is in order. The hydraulics then have to be tested.

The control unit is provided with a fault memory and is thus capable of diagnosis. Faults occurring remain stored even when the ignition is switched OFF and the battery is disconnected. The fault memory can be read out using HHT via a test coupling (140 589 14 63 00), see SPECIAL TOOLS  under TROUBLE SHOOTING, in the module box. The fault path under investigation is displayed with the fault readout.

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