ECU information available
Actuator test: no OK
Measure parameters: yes
Characterised by: coherence
Checks to be carried out if fault is present
Coherence
| conditions under which the fault appears | checks to be made conditions for checking |
|---|---|
| vehicle in motion | carry out a road test with the diagnostic equipment, check the parameter measurements at different vehicle speeds ignition off, engine ECU: disconnected, vehicle speed sensor: disconnected: - check: the continuity and insulation of wire C - check: supply to the vehicle speed sensor wire +ve ignition on, wire A, fuse F, continuity of the earth wire M, earth point MM |
Check(s) to be carried out if no fault found
Check the consistency of the signal perceived by the ECU (measure parameters)
Ignition on, engine ECU: disconnected, vehicle speed sensor: disconnected: check: no voltage: terminal 28 of the ECU connector
Ignition off, engine ECU: disconnected, vehicle speed sensor: disconnected
- No earth at terminal(s) 28 on the 55V.NR connector
- Check: supply to the vehicle speed sensor wire +ve ignition on, fuse F, wire A, continuity of the earth wire M, earth point MM
