Dtc 30033 Main Cont - Yale MPB045VG Maintenance Manual

Diagnostic Trouble Codes
POSSIBLE CAUSE
A. MAIN CONTACTOR COIL WIRING FAULT
B. MAIN CONTACTOR COIL FAULT
C. 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: Proceed to CAUSE A.
NO: Problem may be intermittent.
CAUSE A - MAIN CONTACTOR COIL WIRING FAULT
PROCEDURE OR ACTION:
NOTE: Key in ON position.
1. Disconnect the main contactor coil's positive socket terminal TS007 and measure voltage between socket
terminal TS007 and B(-).
Is voltage 24 ± 2.5 Vdc?
YES: Proceed to Step 2.
NO: Inspect circuit W239-B for open or short.
NOTE: Key in OFF position.
2. Disconnect traction controller connector CPS001 and the contactor coil's negative socket terminal TS008.
Measure resistance between the main contactor coil negative socket terminal TS008 and the traction
controller connector CPS001, socket 6.
Is resistance <1 ohm?
YES: Proceed to CAUSE B.
NO: Inspect ground control circuit 075 for open or source of excessive resistance.
Check the Service Manual section in Yale Axcess Online for possible updates and check pertinent Bulletins
9030-20-6
Please refer to the end of this procedure for supporting diagrams.
DTC 30033
Main Cont
NOTE
Confidential/Proprietary - Do Not Copy or Duplicate
ELECTRICAL SYSTEM