Dtc 30069 Precharge - Yale MPB045VG Maintenance Manual

ELECTRICAL SYSTEM
POSSIBLE CAUSE
A. CONTROLLER WIRING FAULT
B. FAULTY TRACTION 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 Step 3.
NO: Problem may be intermittent.
NOTE: The capacitor bank will charge only when the main contactor is closed. If the truck is static, tiller arm up,
no inputs commanded; the capacitor voltage is going to be 0 Vdc and KSI (Key Switch Input) voltage shall read
battery voltage.
3. Connect to PC Service Tool, enable main contactor and view diagnostics for capacitor voltage and battery
voltage.
Is CAP voltage same as battery voltage?
YES: Verify battery state of charge and recheck condition. If actual voltage does not agree with PC service
tool diagnostics, proceed to CAUSE B.
NO: Proceed to CAUSE A.
CAUSE A - CONTROLLER WIRING FAULT
PROCEDURE OR ACTION:
1. Measure voltage between the traction controller B(+) terminal and B(-).
Is precharge voltage same as battery voltage?
YES: Proceed to CAUSE B.
NO: Check for external loads or shorts on the B(+) circuit and phase cables. Refer to the Basic Electrical
Troubleshootingsection and perform Voltage Checks.
CAUSE B - FAULTY TRACTION 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.
END POSSIBLE CAUSES
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 30069
Precharge
NOTE
Diagnostic Trouble Codes
9030-20-29