ECU information available
Actuator test: yes
Measure parameters: yes
Checks to be carried out if fault is present
| conditions under which the fault appears | checks to be made conditions for checking |
|---|---|
| ignition on open circuit or short circuit to positive or short circuit to earth (on terminals 3, 4, 31, 32 of the engine control unit) | ignition on, engine ECU, disconnected: - check: no voltage at terminal(s) 3, 4, 31, 32 of the control unit ignition off, engine ECU, disconnected: - no earth at terminal 3, 4, 31, 32 on the 88 V.NR connector ignition off, engine ECU, disconnected, idling regulation stepper motor, disconnected: - check continuity of wires A, B, C and D ignition off, engine ECU, disconnected, idling regulation stepper motor, connected: - 50 Ω ≤ R ≤ 60 Ω between terminals 3 and 32 and terminals 4 and 31 of connector of the control unit |
Check(s) to be carried out if no fault found
Carry out the stepper motor actuator test
- the stepper motor works
- disconnect the ECU for 5 minutes and then initialise it
- check the idle speed with the engine warm
- check that there are no air leaks beyond the throttle butterfly
- the stepper motor does not work
- replace the stepper motor
A all types except for 406
B 406
