Dtc 30087 Overvolt - Yale MPB045VG Maintenance Manual

ELECTRICAL SYSTEM
POSSIBLE CAUSE
A. HIGH VOLTAGE AT CONTROLLER TERMINALS
B. CONTROLLER WIRING FAULT
C. FAULTY CONTROLLER
COMPONENT OPERATIONAL CHECK
PROCEDURE OR ACTION:
1. Conduct a visual inspection of all connectors/wiring associated with the fault code.
Are any faults detected/observed?
YES: Repair/replace connector or wiring associated with faults found. Refer to the appropriate Electrical
SystemYRM.
NO: Proceed to Step 2.
2. Re-key the vehicle.
Is the code still present?
YES: Disconnect battery and discharge the capacitor. Connect battery and re-key the vehicle prior to
performing CAUSE A.
NO: Problem may be intermittent.
CAUSE A - HIGH VOLTAGE AT CONTROLLER TERMINALS
PROCEDURE OR ACTION:
1. Measure voltage between B(-) at the controller and FU1 (above controller).
Is voltage above 26 Vdc?
YES: Ensure battery is rated at 24V and is properly connected to the truck.
NO: Proceed to CAUSE B.
CAUSE B - CONTROLLER WIRING FAULT
PROCEDURE OR ACTION:
NOTE: Key in OFF position.
1. Measure voltage between the traction controller B(+) terminal and B(-).
Is precharge voltage same as battery voltage?
YES: Proceed to CAUSE C.
NO: Inspect B(+) cable for damage or loose connections.
CAUSE C - FAULTY CONTROLLER
PROCEDURE OR ACTION:
1. If no faults are found, replace controller. Make sure to indicate the DTC code(s) on the warranty claim to
include an accurate problem description leading to controller replacement.
Check the Service Manual section in Yale Axcess Online for possible updates and check pertinent Bulletins
Confidential/Proprietary - Do Not Copy or Duplicate
Please refer to the end of this procedure for supporting diagrams.
DTC 30087
OverVolt
NOTE
Diagnostic Trouble Codes
9030-20-35