ECU information available
Actuators test: yes
Parameter measurements: no
Characterised by
- Short circuit to positive
- Open circuit or short circuit to earth
Checks to be carried out if fault is present
Short circuit to positive
| conditions under which the fault appears | checks conditions for checking |
|---|---|
| cutting off the ECU supply (for the double relay) with no ECU command | control unit disconnected, inertia switch disconnected, ignition off, check: - insulation of wire(s) A, B, C, D, E - condition and operation of double relay 1304 - all private vehicles since 1203 except LCVs and electric vehicles, (LPG or Natural Gas for Vehicles) |
Open circuit or short circuit to earth
| conditions under which the fault appears | checks conditions for checking |
|---|---|
| ECU supply cut off (by the double relay) + 2 seconds after the ECU command | control unit disconnected, inertia switch disconnected, ignition off, check: - the continuity and insulation of wire(s) A, B, C, D, E - condition and operation of double relay 1304 - all private vehicles since 1203 except LCVs and electric vehicles, (LPG or Natural Gas for Vehicles) |
+P: battery +ve
+BB: battery +ve supply