. OPERATION TROUBLESHOOTING a potentiometer that detects the amount that the depressed. In addition, there is a switch that judges if the accelerator pedal is being depressed or released. 3 - 138 IF ACCELERATOR PEDAL HAS FAILED Th e a ccelerator p edal is equipp ed wit erator pe is has been If it is impossible to detect correctl y the amoun t that the ac celerator p edal is de pressed because of breakage of the accelerator pedal o r defective wiring, th e eng ine controlle r controls the engin e in accordance with the signal from thi s judgment switc h.
When t he a ccelerator p edal i s bein g depressed, the en gine speed i s set to 1 500 rpm; when the accelerator pe dal is released, the e ngine speed is set to low idling. The s peed differs accordin g to the lo ad. Operate the accele rator peda l to move the m achine to a s afe place , then che ck the failur e code a nd contact your Komatsu distributo When operating th e accelerator p edal, releas e the p edal t o turn i t to the OFF p osition (low idling) or depress i t fully to set to 1500 rpm.
If t he operated REMARK If t he engine contr oller cannot correctly receiv e the signal for the amount that the accelerator peda l is depressed, the central warning lamp will f lash , the alarm buzze r will s ound, and action co de "E03" wil l be disp layed.