The fault code of 42 detection circuit of Daewoo ESPERO

Published:2011/5/16 21:05:00 Author:Borg | Keyword: fault code, detection circuit | From:SeekIC

The fault of 42 represent the circuit (EST) is abnormal when electric ignition of the system is igniting. When the engine starts, the igniting module will send spindle position and rotating speed signals (through No.430 circuit ) to ECM. As long as the rotating speed of the engine is less than 400/min, the igniting time is under control of igniting module; and when the rotating speed of the engine is more than 400r/mm, the computer ECM will give No. 424 circuit a 5V reference voltage and shift the igniting time control to EST terminal, then No. 423 circuit will control the igniting time.The voltage on EST is changing (see as Figure 22 and Figure 6)]



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