231
M4.8-1055-021
03 Rev. 10/09
ELECTRICAL
Event Code 203
Event Code 203
High voltage on hydraulic terminal outputs (AC
Hydraulic units only).
Step 1: Check voltage at each hydraulic motor power
cable connection, 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 hydraulic motor output (U, V
& W) on ACCESS 2 with key on. Use BNEG on
ACCESS 2 as reference.
• If: Less than 15 Vdc.
– Then follow Event 201 procedures.
• If: Greater than 20 Vdc.
– Then replace ACCESS 2.
• If: 15 to 20 Vdc.
– Then proceed to Step 4.
Step 4: Verify power cables are connected correctly
between motor and ACCESS 2.
• If: Cables connected correctly.
– Then proceed to Step 5.
• If: Cables connected incorrectly.
– Then repair/replace as necessary.
Step 5: Check for open hydraulic motor. Remove
power cables. Measure and record resistance across
each of the following phases (U to V), (U to W), (V to
W).
• If: Greater than 1 ohm or open.
– Then replace motor.
• If: Less than 1 ohm resistance.
– Then replace ACCESS 2.
Figure 15995
Crown 2007 PF15665-21 Rev. 10/09
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