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

C5 Code C5: Open in Brake or Tail Light Circuits

An open was detected in the rear light circuits.

C8 Code C8: Option. Open Circuit d.1 Code d.1: TPA Power Supply or CAN-Bus Failure d.2 Code d.2: VM Power Supply or CAN-Bus Failure d.3 Code d.3: d.1 + d.2 d.4 Code d.4: PPA Power Supply or CAN-Bus Failure d.5 Code d.5: d.1 + d.4

An open was detected in the travel alarm or warning light, or safety lowering valve circuits.

The Display did not receive communication from the TPA.

The Display did not receive communication from the VM.

The Display did not receive communication from the PPA.

Notes/Corrective Action d.6 Code d.6: d.4 + d.2

Check bulbs. Check for voltage to all lights.

Check the travel alarm, warning light, working lights, and/or lowering control valve circuits.

Check for power to the TPA. If OK, replace the TPA.

Check for power to the VM. If OK, replace the VM.

Use steps for Codes d.1 and d.2.

Check for power to the PPA. Check for opens in the communications wires between the TPA and PPA. If OK, replace the PPA.

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.

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

Section 6.Messages and Codes

Fault Codes 6-28

Model 4700 Maintenance Manual

Refer to the “Pinout Matrix” located in Theory of Operation section for all voltage and resistance values and component interconnection.

d.7 Code d.7: d.4 + d.2 + d.1 d.8 Code d.8: Armrest Board Power Supply or CAN-Bus Failure

Connect FlashWare and see if the versions for the Display, TPA, PPA, and VM can be seen. If only the Display is not shown, check connections to the Display. If OK, replace the Display. If the other devices are not shown and the Display is shown, check connections to the VM from the Display. Verify power to the devices. If OK, replace the VM. If no devices are shown, check for shorts between the CAN High and CAN Low wires. Measure resistance between the CAN High and CAN Low pins going into the Display. The reading should be approx. 180 ohms. If open or shorted, replace the Display.

The Display did not receive communication from the Armrest Board.

Check for power to the Armrest Board. Check for opens in the communications wires between the Armrest Board and the VM. If OK, replace the Armrest Board.

Publication 1160093, Issued: 20 May 2013