Troubleshooting
Error codes
© BT
Repair manual
SWE100, 120, 120L, 120S, 140, 140L, 200D
7 – 19
Order no..
Date
Valid from serial no.
T code
258946-120
2012-08-30
6061850-
841×842×843
4.521
The main contactor is open.
Pump motor voltage too low.
Check:
•
the wiring harness between the
transistor regulator and the pump
motor
•
the pump motor.
4.522
The main contactor is open.
Pump motor voltage too high.
Check:
•
the wiring harness between the
transistor regulator and the pump
motor.
•
the pump motor.
4.540
Transistor regulator stops all functions.
•
The transistor regulator output to the
lowering valve is short-circuited.
•
Internal short-circuit in the transistor
regulator.
•
Inspect the connections and wiring
harness.
•
Disconnect the wiring to the lowering
valve and try restarting the truck.
•
If the error remains, replace the
lowering valve or the transistor
regulator.
4.541
Transistor regulator stops all functions.
The transistor regulator output to the
lowering valve is short-circuited to B-.
Inspect the connections and wiring
harness.
4.560
Transistor regulator stops all functions.
The transistor regulator output to the
lowering valve is open.
Check:
•
connections and wiring harness
•
the lowering valve coil.
Code
Event
Possible cause
Action
https://www.besttruckmanuals.com/