E0152-03-Coolant Temp / Fuel Filt Shorted To High Source (B.50.A.95.90 - G.30.B.54) - New Holland CX720 Repair Manual

E0152-03-Coolant Temp / Fuel Filt Shorted To High Source
(B.50.A.95.90 - G.30.B.54)
CX720 Series 1282 - 1347, CX720 Series 1238 - 1281, CX720 Series 1206 - 1237, CX740 Series 1282 - 1347, CX740 Series 1238 - 1281, CX740 Series
1206 - 1237, CX760 Series 1282 - 1347, CX760 Series 1238 - 1281, CX760 Series 1206 - 1237, CX780 Series 1282 - 1347, CX780 Series 1238 - 1281,
CX780 Series 1206 - 1237, CX820 Series 1282 - 1347, CX820 Series 1238 - 1281, CX820 Series 1206 - 1237
E0152-03 - Coolant Temp / Fuel Filt Shorted To High Source
NOTE: This troubleshooting chart is for CX Combines Series 1206 - 1347 that are equipped with a NH 7.5 L mechan-
ical engine. This fault does not apply to units with electronic engines.
Cause:
The coolant temperature sensor (B-31) circuit is shorted to 12 volts. (NH7.5L Mechanical Engines Only)
Possible failure modes:
1. Sensor supply wiring shorted to 12 volts.
2. Controller internal failure (internal regulator failure).
Solution:
1. Enter the InfoView monitor - "Diagnose info" screen.
Select "Engine" sub menu.
Select "Coolant Temp / Fuel Filt" and check voltage range.
The proper voltage range is - 0.5 - 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 within the proper limits, continue the troubleshooting at step 4.
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 coolant temperature sensor connector
X310.
A. If the voltage drops to 0.5 - 4.9 volts, the short is in the sensor or sensor wiring. Replace the sensor.
B. If the voltage remains high on InfoView monitor, continue with Step 3.
3. The voltage reading on the InfoView monitor is high. Disconnect the engine harness from the main frame har-
ness at connector X010.
A. If the voltage drops to 0.5 - 4.9 volts, the short is in the engine (EN) harness between connector X010 pin
18 and connector X310 pin B wire 429 yellow.
B. If the voltage remains high on InfoView monitor the short circuit is in the main frame harness between
connector X010 pin 18 and connector X016 pin J2-24 wire 429 yellow.
4. Operate the machine while monitoring InfoView monitor. If no high out of range readings are indicated, erase
the fault code and continue operation.
A.
POWER PRODUCTION - ENGINE COOLANT SYSTEM
2 4/7/2006
B.50.A / 64