E0152-04-Coolant Temp / Fuel Filt Shorted To Low Source (B.50.A.95.90 - G.30.B.53) - New Holland CX720 Repair Manual

E0152-04-Coolant Temp / Fuel Filt Shorted To Low Source
(B.50.A.95.90 - G.30.B.53)
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
E0152-04 - Coolant Temp / Fuel Filt Shorted To Low 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 ground. (NH7.5L Mechanical Engines Only)
Possible failure modes:
1. Sensor supply wiring shorted to ground.
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 low out of range (0 - 0.5 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 low (0 volts). Disconnect the coolant temperature sensor con-
nector X310.
A. If the voltage increases to 0.5 - 4.9 volts, the short is in the sensor or sensor wiring. Replace the sensor.
B. If the voltage remains low, continue with step 3.
3. The voltage reading on the InfoView monitor is low. Disconnect the engine harness from the main frame harness
at connector X010.
A. If the voltage increases to 0.5 - 4.9 volts, the short is in the engine (EN) harness between connector X010
pin 18 and connector 310 pin B wire 429 yellow. Locate the short to ground and repair.
B. If the voltage remains low, the short is in the main frame (MF) harness between connector X010 pin 18
and connector X016 pin J2-24 wire 429 yellow. Locate the short and repair.
4. Operate the machine while monitoring InfoView display. 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 / 65