Check: knock detection function — variant 3 Peugeot 406 I

Power unit

ECU information available

Actuator test: no OK

Measure parameters: no OK

Checks to be carried out if fault is present

conditions under which the fault appears	checks to be made conditions for checking
engine running: coolant temperature greater than 70 degrees C engine speed above 3000 rpm	ignition off; engine ECU, disconnected: - knock sensor, disconnected: - XU engines: check continuity and insulating of wires A, B, D, M - condition and connection of connector 3 V.VE(BE) - TU engines: check continuity and insulating of wires A, B - condition and connection of connector 2 V.NR(VE) - securing of knock sensor - if correct replace the engine management ECU ignition on; engine ECU, disconnected; knock sensor, disconnected: check: - no voltage at terminal(s) 10 - 38 of the control unit

conditions under which the fault appears

checks to be made conditions for checking

engine running: coolant temperature greater than 70 degrees C engine speed above 3000 rpm

ignition off; engine ECU, disconnected: - knock sensor, disconnected: - XU engines: check continuity and insulating of wires A, B, D, M - condition and connection of connector 3 V.VE(BE) - TU engines: check continuity and insulating of wires A, B - condition and connection of connector 2 V.NR(VE) - securing of knock sensor - if correct replace the engine management ECU ignition on; engine ECU, disconnected; knock sensor, disconnected: check: - no voltage at terminal(s) 10 - 38 of the control unit

A XU engines