Analyzing various signals (see table of diagnostic codes below), the electronic control unit determines the failed system by the value of operational parameters recorded by the corresponding sensor or actuator.
A warning light on the instrument panel informs the driver that there is a malfunction. The signal turns off automatically immediately after the malfunction has been eliminated. However, the electronic unit stores fault codes in its memory (usually, except for codes No. 16, 43, 51, 53), associated with the corresponding faults until the diagnostic system is cleared (Not "throw off" information) by disconnecting the fuse with the ignition off.
If a malfunction was detected, then when working in test mode, its code will be displayed (with the exception of the codes indicated in the table). In this case, the conclusions must be closed "TE2" And "E1" diagnostic socket.
When working in test mode, even after the malfunction has been eliminated, the diagnostic code will be stored in the memory of the electronic control unit even when the ignition is off (other than those mentioned above). This is also possible when working in the current self-diagnosis mode. Selecting the type of self-diagnosis mode (current or test) and the output of diagnostic codes is carried out by jumping the outputs "TE1", "TE2" And "E1" diagnostic socket.
Diagnostic connector