ECU information available
Actuator test: no OK
Measure parameters: yes
Characterised by
- Short circuit to earth or open circuit
- Short circuit to positive
- Measured flow too low
- Coherence at idle
Checks to be carried out if fault is present
Short circuit to earth or open circuit
| conditions under which the fault appears | checks conditions for checking |
|---|---|
| voltage below 0.05 V on terminal 13 of connector 88V.NR of the injection ECU 1320 | control unit disconnected, ignition off, verify: - the continuity and insulation of wire A engine running at idle, verify: - voltage approximately 2 V between terminals 13 and 22 of connector 88V.NR |
Short circuit to positive
| conditions under which the fault appears | checks conditions for checking |
|---|---|
| none | control unit disconnected, ignition off, verify: - insulation of wire A engine running at idle, verify: - voltage approximately 2 V between terminals 13 and 22 of connector 88V.NR |
Measured flow too low
| conditions under which the fault appears | checks conditions for checking |
|---|---|
| engine speed greater than 3000 rpm and air flow less than 300 mg/stroke for more than 4.5 seconds | engine speed 3000 rpm, verify: - voltage approximately 3.1 V between terminals 13 and 33 of connector 88V.NR engine running at idle, verify: - voltage approximately 2 V between terminals 13 and 22 of connector 88V.NR |
Coherence at idle
| conditions under which the fault appears | checks conditions for checking |
|---|---|
| engine speed between 700 and 900 rpm and air flow greater than 800 mg/stroke | engine running at idle, verify: - voltage approximately 2 V between terminals 13 and 22 of connector 88V.NR |
+CC: ignition controlled + supply
T°: temperature
CTN: negative temperature coefficient
+BAT: + battery
US: output voltage