Table of Contents
Advertisement
◼ Read Trouble Code
Read trouble codes that are stored in ECU. For the fault code, the diagnostic
instrument will give specific detailed definitions and explanations to help you locate
and eliminate the car fault.
Figure 4-9 Sample of Reading DTC
In the process of diagnosis, if the device shows "System is OK" or "No Trouble Code", it
means there is no related trouble code stored in ECU or some troubles are not under the
control of ECU, most of these troubles are mechanical system troubles or executive circuit
troubles, it is also possible that signal of the sensor may bias within limits, which can be
judged in Live Data.
◼ Clear Trouble Code
It allows clearing current and historical trouble codes memory in ECU, under the
premise that all the troubles are eliminated. There are two types of fault codes, one is
a permanent fault code and the other is a non-permanent fault code. The former
requires manual troubleshooting of the car before it can be cleared with a diagnostic
tool. Non-permanent fault codes can be cleared directly with the diagnostic tool.
29
Advertisement
Table of Contents
