ELECTRICAL
Event Code 203
230
M4.8-1055-020
03 Rev. 10/09
Event Code 203
High voltage on motor terminal outputs (DC
Hydraulic units only).
Problem is with motor connections, motor power circuit
or controller. Check Event 201 procedures.
Step 1: Check voltage at hydraulic motor power cable
connections, with Key on. Use BNEG on ACCESS 2 as
reference.
• If: Less than 15 Vdc.
– Then proceed to Step 2.
• If: Greater than 20 Vdc.
– Then proceed to Step 3.
• If: 15 to 20 Vdc.
– Then proceed to Step 4.
Step 2: Verify BNEG is present at ACCESS 2 power
connection by moving positive meter lead to +BV at
battery.
• If: 35 to 38 Vdc.
– Then proceed to Step 3.
• If: 0 Vdc.
– Then issue exists in BNEG power circuit.
Step 3: Check voltage at traction motor output +BV
and P- ACCESS 2 with key on and full speed lift en-
gaged.
• If: Less than 35 Vdc.
– Then proceed to Step 4.
• If: Greater than 35 Vdc.
– Then replace ACCESS 2.
Step 4: Verify power cables are connected correctly
between motor(s) and ACCESS 3.
• If: Cables connected correctly.
– Then proceed to Step 5.
• If: Cables connected incorrectly.
– Then repair/replace as necessary.
Step 6: Check for open hydraulic motor winding. Re-
move power cables from hydraulic motor. Measure re-
sistance across A to D cable studs.
• If: Greater than 1 ohm or open.
– Then check brushes. Replace motor as neces-
sary.
• If: Less than 1 ohm.
– Then replace ACCESS 2.
Figure 15996-01
Crown 2007 PF15665-20 Rev. 10/09
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