New Holland WorkMaster 50 Service Manual page 963

Electrical systems - FAULT CODES
DTC 532-03-Engine coolant temperature has exceeded the warning
threshold
Control Module : ECU
Context:
The Engine Control Unit (ECU) A-9000 monitors the engine coolant temperature. Two engine temperature thresholds
are monitored by the ECU A-9000, a pre-warning, and a warning. If the ECU A-9000 monitors a temperature greater
than 111.96 °C (233.53 °F), a warning is set and this fault will occur. For more information regarding cooling system
troubleshooting, see Engine cooling system - Troubleshooting (10.400).
Cause:
A coolant temperature level warning has been set by the ECU A-9000.
Possible failure modes:
1. Coolant level low.
2. Faulty cooling system, leakage or blockage.
3. Extremely high environmental temperature or heavy machine use.
4. Faulty coolant temperature sensor B-9003, wiring or internal failure of sensor.
5. Faulty ECU A-9000, software.
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