Hyster/Yale DTC 523592-2 Regeneration Switch Message Error

DTC 523592-2 – Regeneration Switch Message Error

POSSIBLE CAUSE
A. CANBUS COMMUNICATION FAULT
B. ACU FAULT

COMPONENT OPERATIONAL CHECK
PROCEDURE OR ACTION:

Turn power to OFF for no less than 30 seconds, and then to ON to clear displayed DTC.
Does reported DTC reoccur?
YES: Go to Step 2.
NO: Problem not verified. Resume operation.
Conduct a quick visual inspection of all connectors/wiring associated with the displayed fault code. Make sure electrical connection is a good physical connection (i.e. sockets and pins are seated correctly; connector “clicks” indicating locking tab works correctly).
Are any of the connectors/wiring damaged?
YES: Repair/replace connector or wiring associated with faults found. Refer to appropriate Electrical System manual, depending on lift truck model.
NO: Go to CAUSE A.

Measure voltage between the ACU connector CPS205, socket 28 and B(-).
Is CAN HI voltage approximately 2.5 Vdc?
YES: Proceed to Step 2.
NO: Inspect CAN HI circuit for open or short. If voltage is 0 volts, the CAN HI circuit is shorted to ground or
open. If voltage is above 5 volts, the CAN HI circuit is shorted to power.
Measure voltage between the ACU connector CPS205, socket 27 and B(-).
Is CAN LO voltage approximately 2.5 Vdc?
YES: Disconnect battery and proceed to Step 3.
NO: Inspect CAN LO circuit for open or short. If voltage is 0 volts, the CAN LO circuit is shorted to ground or
open. If voltage is above 5 volts, the CAN LO circuit is shorted to power.
Measure resistance between the ACU connector CPS205, socket 28 and socket 27.
Is resistance 60 ± 6 ohms?
YES: No communication faults are present, connect battery and proceed to CAUSE B.
NO: If resistance is 120 ohms, the CANbus has an open circuit or a missing or damaged termination resistor.
If resistance is 0 ohms, the CANbus circuits are shorted together.

If no wiring or communication faults are present, replace faulty ACU, clear DTC and retest system