Page 95
45-J Desel - Servce & Parts Manual
January 2022
Electrical System Troubleshooting
The electronic control system used on this machine was designed for low maintenance and long,
trouble-free operation. The system consists of two microprocessor based modules: the GP440
Module in the upper controls box and the GP400 Module, located in the lower controls box. They
communicate through a low voltage digital signal called CAN-Bus communication.
To protect against part failure or incorrect plug connections, the modules are fully short circuit and
reverse polarity protected. All electrical plug connections are waterproof to promote longer trouble
free operation and to increase terminal life.
NEVER ATTEMPT TO SUPPLY BATTERY POWER, OR VOLTAGE HIGHER
THAN 12 VOLTS TO ANY PART OR MODULE IN THIS SYSTEM, AS
CATASTROPHIC FAILURE OF THE MODULES MAY RESULT������
USE OF HIGH PRESSURE WASHING EQUIPMENT DIRECTLY ON THE
MODULES CAN FORCE WATER INTO SEALED CONNECTIONS AND
CAN CAUSE A TEMPORARY SYSTEM SHUT-DOWN������ HIGH PRESSURE
WASHING WITHIN THE VICINITY OF THE MODULES IS HIGHLY
DISCOURAGED������
Secton 19 - Troubleshootng
Electrical System Troubleshooting
