ECU information available
Actuators test: yes
Parameter measurements: yes
Characterised by
- Short circuit to positive
- Short circuit to earth
- Not specified (short circuit to earth or short circuit to positive)
Checks to be carried out if fault is present
Short circuit to positive
| conditions under which the fault appears | checks to be made conditions for checking |
|---|---|
| engine running | check: ignition on, ECU connected: - lack of 12 V at terminals 30, 49 of ECU 1320 (55V.NR) |
Short circuit to earth
| conditions under which the fault appears | checks to be made conditions for checking |
|---|---|
| engine running | check: ignition off, control unit disconnected: - no earth on terminals 30, 49 of connector 55V.NR - R ≃ 199,9 kΩ between terminals 49 and 19 of the control unit connector 55V.NR - R ≃ 199,9 kΩ between terminals 30 and 19 of the control unit connector 55V.NR |
Not specified (short circuit to earth or short circuit to positive)
| conditions under which the fault appears | checks to be made conditions for checking |
|---|---|
| engine running | check: ignition on, ECU connected: - lack of 12 V at terminals 30, 49 of ECU 1320 (55V.NR) ignition off, control unit disconnected: - no earth on terminals 30, 49 of connector 55V.NR - R ≃ 199,9 kΩ between terminals 49 and 19 of the control unit connector 55V.NR - R ≃ 199,9 kΩ between terminals 30 and 19 of the control unit connector 55V.NR |
Check(s) to be carried out if no fault found
Check the consistency of the signal perceived by the ECU (parameter measurements)
Check continuity of wires A, B, C
Check: conformity of the screening
