TROUBLESHOOTING
Troubleshooting - 68
Electrical Troubleshooting Guide
1.
Always ensure that there is power supplied to the computer (TCM). With the key switch in the Off posi
-
tion, check to ensure the LED light for the Power input (J) is turned on. If the light is not on:
a. Check the battery disconnect switch to ensure it is turned on.
b. If the battery disconnect switch was already turned on, the TCM may be in ‘Sleep’ mode. Turn the
battery disconnect switch off for 10 seconds and then back on to ‘Wake’ the TCM.
c. Check the 15 amp fuse in slot #10 of the rear fuse panel. Replace this fuse, if necessary.
2. Turn the key switch to the On position and check to see if any of the other lights turn on. If no other
lights turn on, check the 5 amp fuse in slot #9 of the rear fuse panel. Replace this fuse, if necessary.
If any other lights turn on, you can start troubleshooting the rest of the TCM functions.
3. To troubleshoot the circuits in the chart below, the corresponding LED lights must be ‘On’ for the circuit
to function. If any of the required LED lights are not on, refer to the troubleshooting section in the follow-
ing pages.
Circuit
Power
Brake
Switch
Neutral
Switch
PTO
Switch
Seat
Switch
Engine
Starter
Key
Switch
Starter
PTO
12V Run
w/o Operator
12V Run
w/Operator
Engine Stop
Ground
DSL Pre-Heat*
2
1
* Diesel engines only
1
Turns on when the key switch is turned to the Run position. Remains on for 6 seconds.
2
Turns on when starter is engaged. Remains on for 5 seconds after the engine starts and the key switch is released and returns to the Run position.