P0118/3: Failure With Cooling Water Temperature Sensor (High Voltage) - Yanmar 3TNV82A Troubleshooting Manual

DTCs (Diagnostic Trouble Codes) General Description

(2) P0118/3: Failure with Cooling Water Temperature Sensor (High Voltage)

DTC P0118/3
DTC Detecting Conditions
1 - Precondition; 2 - Detecting condition(s);
3 - Flashing pattern of failure indicator
1. Key switch ON.
2. Sensor voltage 4.8 [V] or higher.
3. Four flashes.
Movement at Error occurrence
Error Mode [Run Under Restrictions]:
The engine continues to run under
restrictions.
The engine continues to run with the cooling water temperature set to the default of
30 [°C].
Run restricted? Yes: The system restricts the High idle
Recovery No.
Conditions
Remarks The restriction similar to one applied
against EGR errors is applied.
Estimation of Failure cause/Error condition
• The connector may not be properly connected.
• Wiring defect of the harness
The cooling water temperature sensor's signal wires may be disconnected or short-circuited with
•
POWER SUPPLY.
The cooling water temperature GND wire may be disconnected.
•
• The cooling water temperature sensor may be faulty.
Output defect of the cooling water temperature signal by the inner wiring disconnection
•
• The E-ECU internal circuitry may be faulty.
TNV DI Service Manual
In the case of a system with EGR
speed or engine power.
Failure with Cooling Water Temperature Sensor (High
Voltage)
Connector
Harness
Cooling water temperature sensor
E-ECU
In the case of a system without EGR
[Run As Is]:
No.
Yes: This error will be automatically reset
when a normal sensor voltage (0.2
to 4.8[V]) is kept.
FAILURE DIAGNOSIS
Check points
1-47