Curtis Controller Diagnostics; Diagnostics Method A - Led Panel And Speed Control Fault Code Indicator; Diagnostics Method B - Curtis Programmer - Clarke Clean Track® L24 56317170 Service Manual

Curtis Controller Diagnostics

Diagnostics Method A - LED Panel and Speed Control Fault Code Indicator

Diagnostics Method A uses the machine's control display LED panel and Speed Control Fault Code Indicator (F).
The Curtis 1210- (24V) speed control will output a fault code if there is a problem associated with the speed control
and wheel drive system. See Figure 30. If a speed control fault occurs, the display LED panel (D) will indicate
03. When the
03 is displayed and detects a fault, the Speed Control Fault Indicator (F) will flash a special error
code sequence until the fault is corrected. See the Status LED Fault Codes (Table 1) for a description of the fault
indications.
Service Note: This is how to read the error code status light: For example, OO O = two light flashes, a short

Diagnostics Method B - Curtis Programmer

Diagnostics Method B uses the optional hand-held Curtis programmer model 1307, or the new model 1311 MP1101.
With a programmer, diagnostics and troubleshooting is more direct than with the LED alone. The programmer presents
complete diagnostic information in plain language with no codes to decipher. Faults are displayed in the Diagnostic
Menu, and the status of the controller inputs/outputs is displayed in the Test Menu.
The following four-step process is generally used for diagnosing and troubleshooting an inoperative vehicle:
1. Visually inspect the vehicle for obvious problems.
2. Diagnose the problem using the programmer.
3. Test the circuitry with the programmer.
4. Correct the problem.
5. Repeat the last three steps as necessary until the vehicle is operational.
For example, a vehicle is brought in for repair that does not operate in "forward".
1. Examine the vehicle and its wiring for any obvious problems such as broken wires or loose connections.
2. Connect the programmer, put it in diagnostic mode, then read the displayed fault information. In this example, the
display shows "No Faults Present", indicating that the controller has not detected anything out of the norm.
3. Put the programmer in test mode and observe the status of inputs and outputs in the forward direction. In this
example, the display shows that the forward input did not activate when "forward" was selected, which means the
problem is either in the electronic throttle or the throttle wiring.
4. Check or replace the electronic throttle and wiring, then repeat the test. If the programmer shows the forward
switch closing and the vehicle now drives normally, the problem has been corrected.
Refer to the Status LED Fault Codes (Table 1) for suggestions covering a wide range of possible faults.
66 - Form No. 56043161 - Clean Track
pause, one flash, then a long pause, then the code will be repeated. This indicates a fault code
2,1.
L24
®