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
AB
Code AB: Hydraulic Control Board Driver Fault The positive supply to the valves is shorted or open.
Measure voltage and resistance across coil. If OK, replace the Hydraulic Control Board.
AC
Code AC: Solenoid Group 1 Driver Error An open was detected in the circuits between the Lifting Valve (EV2) and the Hydraulic Control Board.
Measure voltage and resistance across coil. If OK, replace the Hydraulic Control Board.
AD
Code AD: Solenoid Group 2 Driver Error An open was detected in the circuits between the Tilting Valves (EV3 or 4) and the Hydraulic Control Board.
Measure voltage and resistance across coil. If OK, replace the Hydraulic Control Board.
AE
Code AE: Solenoid Group 3 Driver Error An open was detected in the circuits between the Sideshift valves (EV5 or 6) and the Hydraulic Control Board.
Verify battery voltage. If wrong voltage, set correct voltage via FlashWare (and re-Learn pots) or install correct voltage battery. If OK, replace the Hydraulic Control Board.
AF
Code AF: Solenoid Group 4 Driver Error An open was detected in the circuits between the 4th Function valves (EV7 or 8) and the Hydraulic Control Board.
Measure voltage and resistance across coil. If OK, replace the Hydraulic Control Board.
b.0
Code b.0: Coil Shorted A short was detected in the circuits between the 5th Solenoid Valve (EV11) and the Hydraulic Control Board.
Measure voltage and resistance across coil. If OK, replace the Hydraulic Control Board.
b.1
Code b.1: Hydraulic Control Board Power Supply Failure Low voltage is seen at the Hydraulic Control Board.
Check for B+ to Hydraulic Control Board. If present, replace Hydraulic Control Board. If not present, check circuit from the Hydraulic Control Board back to CT1.
Publication 1160093, Issued: 20 May 2013
6-25
