1.2 General information on fault memory Open circuit or short to ground: · Fault code setting conditions

1.2 General information on fault memory Open circuit or short to ground: Fault code setting conditions There is (present)or was (not present)a short circuit to ground or an open circuit in the circuit Faultcodescan be set in severalcircumstances: to the control moduleterminal. e.g. Open circuit or short to B+: There is (present)or was (not present)a short powerfailure circuit to voltage or an open circuit in the circuit to the control moduleterminal. -plug connectionsdisconnected Short to ground: -battery disconnected There is (present)or was (not present)a short circuit to ground in the circuit to the control etc. moduleterminal. In these circumstances,no fault is present in Short to B+: the system and the fault memory must be There is (present)or was (not present)a short erased. circuit to voltage in the circuit to the control moduleterminal. Note: 2. LightonThe fault memory of the PSM control module is maintainedeven in removed state. PSMlightswitchedon Fault memory Info key F8 3. Present/ not present Faultis detected as present or not presentIn order to be able to assess the fault exactly, the fault memory Info key F8 must be pressed. This informationshould be saved using the Save key F4 and printed out. If a fault code is stored with "not present" status and no other problems are present, then the fault memory must be erased. 1. Signalimplausible/ no signalchange/ open circuitor short to ground/ shortto B+ Signal implausible: The incoming signal to the control module deviates from the signal expected. No signalchange: Theincomingsignalto the controlmoduledoes not change. 4503 Diagnosis/troubleshooting PSM 45 -D 61