Toyota Pallet Jack Fault Code C28 29
How to Troubleshoot Toyota Pallet Jack Fault Code C28 29
If you own a Toyota electric pallet jack, you may encounter the fault code C28 29 on the display. This code indicates that the unit did not pass the self-test when first powered on. There are several possible causes and solutions for this error, which we will discuss in this article.
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What is the self-test and why is it important?
The self-test is a diagnostic procedure that the pallet jack performs every time it is turned on. It checks the status of various components and sensors, such as the main ON/OFF switch, the battery voltage, the CAN wiring, the power amplifier, and the lift contactor. The self-test ensures that the pallet jack is safe and ready to operate. If any of these components or sensors are faulty, damaged, or out of range, the self-test will fail and display an error code on the screen.
What are the possible causes of fault code C28 29?
According to the [Toyota Electric Pallet Jack Error Code C28] article, there are seven possible causes of fault code C28 29:
Main ON/OFF switch activate. This means that the main power switch is not turned on or is defective. Make sure that the switch is in the ON position and check for any signs of damage or corrosion.
Low voltage to power amplifier (especially while lifting or driving) possibly due to over-current or short-circuit. This means that the battery is low or there is a problem with the electrical circuit that supplies power to the pallet jack. Try using a known-good battery and check for any loose or broken wires.
PTC R1 missing, faulty, or tripped (very high resistance, due to excessive current while main contactor is open; should automatically recover). This means that the power resistor R1, which is located near the main power switch, is overheated or damaged. This resistor provides the initial power to the controller so it can do the self-test. Carefully check to see if R1 is hot (tripped). If so, unplug the battery and allow it to cool. Locate and correct the low impedance path that tripped R1.
Wire #24 at 0V. This means that there is no power supply to the controller. Check J5 not connected, fuse and wiring. Check for 24V at J5-16.
Short or open circuit in CAN wiring, or electrical noise in CAN wiring due to bad connection or outside interference, both at power ON. This means that there is a problem with the communication network between the controller and other components. Check CAN wiring for any damage or loose connections. Try operating the pallet jack in a different environment.
Faulty power amplifier. This means that the device that controls the motor speed and direction is malfunctioning. Check power amplifier for error code. Check power wiring.
Lift contactor stuck closed. This means that the device that controls the lift pump solenoid is jammed or welded. This can cause excessive current and overheat R1. Check continuity across the lift contactor. If it is stuck closed, try tapping on it lightly to free it up.
How to fix fault code C28 29?
The first step to fix fault code C28 29 is to identify and correct the cause of the error. Depending on the cause, you may need to replace some parts or adjust some settings. You can use a multimeter, a test light, and a service manual to help you troubleshoot and repair your pallet jack. The second step is to clear the error code from the display. To do this, you need to turn off the pallet jack and disconnect the battery for a few seconds. Then reconnect the battery and turn on the pallet jack again. The self-test should run again and if everything is working properly, the error code should disappear. If you still see fault code C28 29 after following these steps, you may need to contact a qualified service technician for further assistance.
Conclusion
Fault code C28 29 is a common error that can occur on Toyota electric pallet jacks. It indicates that the unit did not pass the self-test when first powered on. There are several possible causes and solutions for this error, which we have discussed in this article. By following the steps above, you should be able to troubleshoot and fix your pallet jack and clear the error code from the display. If you need more help, you can watch this [YouTube video] by The Forklift Guy or consult your service manual.
References:
: Toyota pallet jack. Quick troubleshooting tip/help for error code C-28. (read description) - YouTube
: Toyota Electric Pallet Jack Error Code C28 Forklift Error Codes