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DISCUSSION FORUMS : Forkliftaction.communicate
Forum: Technical arena
Discussion:  Cat 2ec25e microcommand system code 29
Number of messages: 2

START MESSAGE:
glock01
Idaho, United States
Does anybody have any expericance with this code. I know it is the speed sensor. I still get this code even after the speed sensor and the sensor wiring have been replaced.  This is an interminiet problem. When the code ativates the fwd or rev contactor do not pull in. You can then turn off the key and then back on and the unit returns to normal. I have checked all inputs to the login board and they are all ok. I have check the fwd/rev contator wiring and replaced both contactors and also the accelerator control.

Posted 13 Jul 2009 05:04 AM Reply  Report this message
REPLIES: Sort replies by
carl_v
Pennsylvania, United States
Any open in the power circuit such as F & R contact tips, cables, terminals on motor. Regen contact has given the same problem if the contact does not pull in. Check coil resistance on Regen contact, should be approx 30 - 50 ohms. As you operate the truck the coil resistance may increase and cause the intermittent 29. Also I have seen the drive current sensor cause a 29 multiple times. Never found a bad speed sensor unless it was damaged. The logic does not see motor movement because of the open in circuit thus 29 comes up.

Posted 14 Jul 2009 02:40 AM Reply  Report this message

Nichiyu

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