SIBS Fuso Canter, Workshop Manual

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MAN-059 8 FEB 2017
39
20. Troubleshooting
1. Problem
a. Possible cause
i. Solution
2. Fault light on control unit flashing.
a. 2x flashes then rest – low battery fault (below 11V (below 22V on a 24V system))
i. Charge vehicle battery
ii. Fault will self-clear when battery voltage is above 11V (22V)
b. 3x flashes then rest – control unit PCB too hot
i. Remove any sources of heat that could be causing the control unit to overheat
ii. Fault will self-clear when the PCB temperature drops below a certain level.
c. 4x flashes then rest - park/emergency brake took too long to release – operation aborted.
i. Check pump reservoir level is not too low. If low check system for leaks.
ii. Possible air in system causing slow release. Bleed park/emergency brake system.
iii. Pump motor has is too hot and has lost effectiveness – allow to cool to ambient.
iv. Cycle ignition to clear the fault from the control unit.
d. 5x flashes then rest – pump relay fault
i. Ensure wiring is not causing a short or open circuit to pump relay.
ii. Check pump relay for correct function – replace if required.
iii. Cycle ignition to clear the fault from the control unit.
e. 6x flashes then rest – dump valve fault
i. Ensure wiring is not causing a short or open circuit to dump valve.
ii. Check dump valve for correct function – replace if required.
iii. Cycle ignition to clear the fault from the control unit.
f. 7x flashes then rest – diff lock solenoid fault
i. Check vehicle diff lock is functioning correctly.
ii. Check wiring connections to diff lock switch.
iii. Check SIBS diff lock relay.
iv. Cycle ignition to clear the fault from the control unit.
g. 8x flashes then rest – pressure sensor fault
i. Ensure wiring is not causing a short or open circuit to pressure sensor.
ii. Check pressure sensor for correct function – replace if required.
iii. Cycle ignition to clear the fault from the control unit.