This function is called «freeze frame» («FREEZE FRAME»). Analyzing data «freeze frame» MUT-II, effective troubleshooting can be carried out. Displayed data items «freeze frame» shown in the table below.
List of displayed positions
Note. If several faults are detected in several systems, only the one fault that was detected first is stored.
Test readiness state
The electronic engine control unit monitors, evaluates the condition (OK / Faulty) and remembers the dynamics of changes in the technical condition of the main diagnosed elements indicated below.
The dynamics of changes in the technical condition can be read by the MUT-II device (if the electronic control unit has already stored information about the technical condition of some element before, MUT-II displays «Complete» - «Done»).
Finally, if diagnostic trouble codes are erased, or when the battery is disconnected, information about the technical condition of the element is also erased at the same time (the memory of the electronic control unit is reset).
- catalytic converter: P0421
- oxygen concentration sensor: P0130
- oxygen concentration sensor heater: P0135, P0141.
Reference table for emergency operation
When the self-diagnostic system detects a malfunction of one of the main sensors, the system switches to emergency control mode so that the car can continue to move (to the service station).
Reference table for emergency operation (continued)
Pic. 7.3. The location of the elements of the MPI fuel system in the car: A - ignition coil; B - misfire detection sensor, camshaft position sensor; C - crankshaft position sensor; D - front oxygen concentration sensor; E - rear oxygen concentration sensor