ECU information available
Actuator test: no OK
Measure parameters: yes
Oxygen sensor test: yes
Characterised by
- Short circuit to positive
- Short circuit to earth or between wires
- Open circuit
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, vehicle in motion: 10 minutes, after starting | ignition on, downstream oxygen sensor (1351) connected: check: presence of voltage U = 0,45 V between terminals 71 and 70 of the 88 V.NR connector downstream oxygen sensor connected, engine hot at idle: check: presence of voltage U = 0,7 V between terminals 71 and 70 on the control unit |
Short circuit to earth or between wires
| conditions under which the fault appears | checks to be made conditions for checking |
|---|---|
| engine running vehicle in motion: 10 minutes, after starting | ignition off; engine ECU, disconnected, downstream oxygen sensor disconnected: - check insulation of wire(s) A - B in relation to earth ignition on, downstream oxygen sensor (1351) connected - check: presence of voltage U = 0,45 V between terminals 71 and 70 of the 88 V.NR connector downstream oxygen sensor connected, engine hot at idle: - check: presence of voltage U = 0,7 V between terminals 71 and 70 on the control unit |
Open circuit
| conditions under which the fault appears | checks to be made conditions for checking |
|---|---|
| engine running vehicle in motion: 10 minutes, after starting | ignition off; engine ECU, disconnected, downstream oxygen sensor disconnected: - check continuity of wires A and B ignition on, downstream oxygen sensor (1351) connected - check: presence of voltage U = 0,45 V between terminals 71 and 70 of the 88 V.NR connector downstream oxygen sensor connected, engine hot at idle: - check: presence of voltage U = 0,7 V between terminals 71 and 70 on the control unit |
A all models
