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
C5
Code C5: Open in Brake or Tail Light Circuits An open was detected in the rear light circuits.
Check bulbs. Check for voltage to all lights.
C8
Code C8: Option. Open Circuit An open was detected in the travel alarm or warning light, or safety lowering valve circuits.
Check the travel alarm, warning light, working lights, and/or lowering control valve circuits.
d.1
Code d.1: TPA Power Supply or CAN-Bus Failure The Display did not receive communication from the TPA.
Check for power to the TPA. If OK, replace the TPA.
d.2
Code d.2: VM Power Supply or CAN-Bus Failure The Display did not receive communication from the VM.
Check for power to the VM. If OK, replace the VM.
d.3
Code d.3: d.1 + d.2
Use steps for Codes d.1 and d.2.
d.4
Code d.4: PPA Power Supply or CAN-Bus Failure The Display did not receive communication from the PPA.
Check for power to the PPA. Check for opens in the communications wires between the TPA and PPA. If OK, replace the PPA.
d.5
Code d.5: d.1 + d.4
Check for opens in the communications wires between the TPA and the VM. Check for power to the TPA and PPA. If OK, replace the TPA or PPA.
d.6
Code d.6: d.4 + d.2
Check for opens in the communications wires between the TPA and PPA. Check for power to the VM and PPA. If OK, replace the PPA or VM.
Publication 1160093, Issued: 20 May 2013
6-27
