• If any of DTCs P0115, P0117, P0118 or P0125 are set simultaneously with DTC P0116, the ECT sensor may have an open or a short circuit. Troubleshoot those DTCs first.
• Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.
CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0116)
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch ON.
(d) Select the following menu items: DIAGNOSIS / ENHANCED II / DTC INFO / CURRENT CODES.
Display (DTC Output)
P0116 and other DTCs
GO TO DTC CHART
(a) Remove the thermostat (see page CO-15).
(b) Measure the valve opening temperature of the thermostat.
In addition to the above check, confirm that the valve is completely closed when the temperature is below the standard.
(c) Reinstall the thermostat (see page CO-15).
REPLACE ENGINE COOLANT TEMPERATURE SENSOR
These DTCs relate to the Throttle Position (TP) sensor. DESCRIPTION
The TP sensor is mounted on the throttle body, and detects the opening angle of the throttle valve. This sensor is a non-contact type. It uses Hall-effect elements in order to yield accurate signals even in extreme driving conditions, such as at high speeds as well as very low speeds. The TP sensor has two sensor circuits which each transmits a signal, VTA1 and VTA2. VTA1 is used to detect the throttle valve angle and VTA2 is used to detect malfunctions in VTA1. The sensor signal voltages vary between 0 V and 5 V in proportion to the throttle valve opening angle, and are transmitted to the VTA terminals of the ECM.
As the valve closes, the sensor output voltage decreases and as the valve opens, the sensor output voltage increases. The ECM calculates the throttle valve opening angle according to these signals and controls the throttle actuator in response to driver inputs. These signals are also used in calculations such as air-fuel ratio correction, power increase correction and fuel-cut control.
Throttle Position Sensor
Sensor Output Voltage (V)
' Fail-Safe Angle
Throttle Valve Opening Angle (° )
The throttle valve opening angle detected by the sensor terminal VTA1 is expressed as a percentage.
Between 10 % and 22 %: Throttle valve fully closed Between 66 % and 98 %: Throttle valve fully open Approximately 19 %: Fail-safe angle (6°)
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