Model 4700 Maintenance Manual
Section 6. Messages and Codes Fault Codes
Refer to the “Pinout Matrix” located in Theory of Operation section for all voltage and resistance values and component interconnection. Code
Description
Notes/Corrective Action
28
Code 28: Steer Sensor Out-of-Range The input voltage from the steer pot is outside the required values.
Check wires to the pot for opens or shorts. Check pot supply and output voltage. Check pot mounting and connection. Check for shorts to frame. Adjust pot to approx. 5.5V with wheels straight. Run default Learn.
29
Code 29: Requesting Travel In Both Directions Forward and Reverse switches are closed at the same time.
Troubleshoot switches and wiring. If OK, replace the TPA.
2A
Code 2A: Master TPA Internal Fault Master TPA has an incorrect configuration.
Verify connections to TPA. Replace the TPA.
2C
Code 2C: Master TPA Parameter Restore Error Internal failure of the Master TPA.
Verify connections to TPA. Replace the TPA.
2E
Code 2E: Parking Brake Switch Error SW7 is closed when travel is detected.
Troubleshoot switch and wiring.
31
Code 31: PPA Internal Fault The power amplifier has detected an internal fault.
Check voltage to the PPA. Check communication wires between PPA, TPA, and VM for continuity and shorts to frame. If OK, replace the PPA.
32
Code 32: PPA Internal Fault Fault in the area of memory where the adjustable parameters are stored.
If code does not clear by cycling Key switch, replace the PPA. If code clears, the adjustable parameters have been reset to default values and require resetting to customer’s requirements via FlashWare.
33
Code 33: PPA Internal Fault Internal Failure of the PPA.
Check voltage to the PPA. If OK, replace the PPA.
Publication 1160093, Issued: 20 May 2013
6-13
