E0162-03-Control Pressure Sensor Shorted To High Source (A.12.A.95.91 - G.30.B.54); Cx720 Series 1206 - 1237, Cx740 Series 1206 - 1237, Cx760 Series 1206 - 1237, Cx780 Series 1206 - 1237, Cx820 Series 1206 - 1237, Cx840 Series 1206 - 1237, Cx860 Series 1206 - 1237, Cx880 Series - New Holland CX720 Repair Manual

DISTRIBUTION SYSTEMS - SECONDARY HYDRAULIC POWER SYSTEM
E0162-03-Control Pressure sensor Shorted To High Source
(A.12.A.95.91 - G.30.B.54)
CX720 Series 1206 - 1237, CX740 Series 1206 - 1237, CX760 Series 1206 - 1237, CX780 Series 1206 - 1237, CX820 Series 1206 - 1237, CX840 Series
1206 - 1237, CX860 Series 1206 - 1237, CX880 Series 1206 - 1237
E0162-03 - Control Pressure sensor Shorted To High Source
NOTE: This troubleshooting chart is for CX combines Series 1206 - 1237 only.
Cause:
The control pressure sensor (B-35) circuit is shorted to 12 volts.
Possible failure modes:
1. Switch supply wiring shorted to 12 volts.
2. Controller internal failure (internal regulator failure).
Solution:
1. Enter the InfoView Monitor - "Diagnose info" screen.
Select "Hydraulics" sub menu.
Select "Control pressure sensor" and check voltage range.
The proper voltage range for the control pressure sensor (key On, engine OFF) is — 0.5 - 2.8 volts.
The proper voltage range for the control pressure sensor (key On, engine Running) is — 2.8 - 4.9 volts.
A. If the voltage reading is high out of range (>5.2 volts), continue with Step 2.
B. If the voltage reading is normal, the shorted wire may not be energized at this time. Continue with step 8.
NOTE: Visually inspect the wiring harness and connectors. Verify that the connector was fully installed. Inspect
the terminals and wires at the connector for pushed back or corroded terminals or damaged wires. Flex the
harnesses involved to reveal intermittent breaks or shorts in the wiring concerned.
2. The voltage reading on the InfoView monitor is high. Disconnect the control pressure sensor connector X098.
Use a multimeter to check for voltage on connector X098 pin B. There should be 5 volts present.
A. If high (>5.5 volts) voltage is found, the regulated voltage supply is incorrect. The error "E0165-03 CCM2
5V Ref Voltage 3 Shorted to High Source" should be listed in the "Active Errors" screen in the Infoview
monitor. Correct that error, and then check to determine if this error has been resolved.
B. If correct voltage is found, continue with step 3.
3. The voltage reading on the Infoview monitor is high. Disconnect the charge pressure sensor connector X098.
Use a multimeter to check for continuity between connector X098 pin A and chassis ground.
A. If continuity is found, continue with step 6.
B. If no continuity is found, continue with step 4.
4. Disconnect the gearbox harness from the main frame harness at connector X011. Use a multimeter to check
for continuity between the harness end of connector X011 pin V and chassis ground.
A. If there is continuity, the open circuit is in the gearbox (GB) harness between connector X011 pin V and
connector X098 pin A wire 434 blue or 683 blue. Locate the open and repair.
B. If there is no continuity to ground, continue with step 5.
5. Remove the cap and buss bar assembly from the splice block D, W04 in the main frame harness. Use a multi-
meter to check for continuity between the splice block D, W04 pin A and chassis ground.
A. If there is continuity, the open circuit is in the main frame (MF) harness between connector X011 pin V
and splice block D, W04 pin F wire 683 blue. Locate the open and repair.
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