FAILURE DIAGNOSIS
TNV DI Service Manual
1-45
DTCs (Diagnostic Trouble Codes) General Description
Cooling water temperature sensor
(1) P0117/4: Failure with Cooling Water Temperature Sensor (Low Voltage)
DTC Detecting Conditions
Movement at Error occurrence
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 short-circuited with GND.
•
The cooling water temperature sensor's GND wire may be short-circuited with POWER SUPPLY.
• The cooling water temperature sensor may be faulty.
•
Output defect of the cooling water temperature signal by the inner wiring short-circuited with GND.
• The E-ECU internal circuitry may be faulty.
DTC
P0117/4
Failure with Cooling Water Temperature Sensor (Low
Voltage)
1 - Precondition; 2 - Detecting condition(s);
3 - Flashing pattern of failure indicator
Check points
1. Key switch ON.
2. Sensor voltage 0.2 [V] or lower.
3. Four flashes.
Connector
Harness
Cooling water temperature sensor
E-ECU
In the case of a system with EGR
In the case of a system without EGR
Error Mode
[Run Under Restrictions]:
The engine continues to run under
restrictions.
[Run As Is]:
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
speed or engine power.
No.
Recovery
Conditions
No.
Yes: This error will be automatically reset
when a normal sensor voltage (0.2
to 4.8[V]) is kept.
Remarks
The restriction similar to one applied
against EGR errors is applied.
TNV_DI_SM_A4-Troubleshooting.book 45 ページ ２００７年１１月１５日 木曜日 午後５時２７分
