Actuators

The system is equipped with an autodiagnostic function which is designed to check for any irregularities in the following components:

Actuators

• injectors
• coils
• charcoal filter solenoid valve
• stepping motor for adjusting engine idle
• electric fuel pump relay
• climate control compressor relay

Sensors

• engine rpm sensor
• engine timing sensor
• air flow meter
• Lambda sensor
• coolant temperature sensor
• detonation sensor
• butterfly position sensor
• vehicle speed sensor

Location of diagnostic connector

The detection and confirmation of a fault, involves it being permanently memorized as well as the appropriate sensor being excluded from the system until correct operation is restored. The detection of a confirmed fault usually involves: the warning light in the dashboard coming on: the warning light goes out when the fault conditions no longer exist.

NOTE During starting, the light is:
- on for 1 second
- off for 0.1 seconds
- on for 0.5 seconds
- kept on/off definitively according to whether "permanent" errors are present/not present.

Using the diagnostic equipment is it possible to carry out a complete fault diagnosis of the system, which consists of three stages:
display of a series of functional parameters (with the engine switched off or running);
display of the errors and their cancelling;
activation of some actuators (active diagnosis).

Recovery strategy

If a fault is detected in the sensors/actuators, the control unit, where possible, replaces the missing data, reconstructing it using software (recovery) to allow the operation of the engine.