IDLER GP-FRONT 2394365 - Caterpillar

Control Replacement
Prior to replacement of the control, ensure that replacement is absolutely necessary. Rarely is the control the cause of a fault. Always check that power is available to the control; battery voltage is required between contacts 1 and 2 of the machine harness connector for the control.Procedure
1. Turn the key start switch to the OFF position. Disconnect the machine harness from the control.2. Remove the control.3. Make sure the replacement control has the correct part number.4. Connect the machine harness to the control.5. Install the replacement control.6. Turn the disconnect and key start switches to the ON position. Make sure the control successfully completes the self test; see Self Test. During the Self Test, make sure the correct machine code is shown.Self Test
Ride/Fan Control Display
(1) Readout. (2) Fault present indicator (red). (3) Service mode indicator (yellow). (4) Power indicator (green).The self test verifies that the ride/fan control is operating properly. The control performs an automatic self test each time the key start switch is turned from the OFF to the ON position.The internal circuits and the display are automatically checked. The operator must observe the display to determine whether or not the control is operating properly. The self test lasts approximately two seconds.During the self test:* Indicator (4) is ON continuously.* Indicators (2) and (3) are ON briefly and then turn OFF.* Readout (1) shows the following in sequence: a. "888."; this tests all segments of readout (1).b. "XXX."; The left most digit is the options code. The center and right most digit are the machine code. The control receives option code information from the options plug in the machine harness. The option code is a single digit representation of the machine configuration. The machine code is a two digit representation of the harness code. The control receives harness code information from CMS on the CAT data link.c. The digital display shows the software version. This number identifies the software which is used within the control. d. "-0-."; this is the mode number. The display is currently in mode 0 (normal mode).* The self test is now finished. The display is in normal mode (mode 0). If there are no faults, readout (1) shows "---.". If a fault has occurred, readout (1) shows the corresponding CID and FMI. See the topic Diagnostic Operation in the Systems Operation section.If the control operates as described, the control is operating properly. If the control does NOT operate as described; a harness code fault is present, the wrong control is installed, or the control is faulty. If readout (1) is blank and the red fault present indicator (2) is FLASHING, then the control is faulty replace the ride/fan control; see the topic Control Replacement.Glossary
+Battery+Battery refers to any of the harness wiring which is part of the circuit that connects to the positive battery post.+V+V is a constant voltage that is supplied to a component to provide electrical power for its operation. +V is provided by an electronic control module or