Dtc P0168 Fuel Temperature Too High. Corolla Auris

Двигатель. COROLLA, AURIS. ZZE150 ZRE151,152 NDE150
Система Управления Двигателем 1Ad-Ftv. COROLLA, AURIS. ZZE150 ZRE151,152 NDE150

DESCRIPTION

INSPECTION PROCEDURE

CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0168)

DTC P0168 Fuel Temperature Too High


DESCRIPTION

The fuel temperature sensor monitors the fuel temperature. The fuel temperature sensor has a thermistor that varies its resistance depending on the fuel temperature. When the fuel temperature is low, the resistance of the thermistor is high. When the temperature is high, the resistance is low. The variations of resistance are communicated to the ECM as changes of voltage (see Fig. 1).
The fuel temperature sensor is connected to the ECM (see below). The 5 V power source voltage in the ECM is applied to the fuel temperature sensor from terminal THF via resistor R.
The resistor R and fuel temperature sensor are connected in series. When the resistance value of the fuel temperature sensor changes due to a change of fuel temperature, the voltage at terminal THF also changes. Based on this signal, the ECM corrects the pressure control compensation of the supply pump and determines errors.
COROLLA, AURIS. ZZE150 ZRE151,152 NDE150.Система Управления Двигателем 1Ad-Ftv.Система Ecd. Dtc P0168 Fuel Temperature Too High

DTC No.
DTC Detection Condition
Trouble Area
P0168
Conditions (a) and (b) continue for more than 1 second with engine speed at 1400 rpm or more:
(1-trip detection logic)
(a) Fuel temperature is more than 96°C (205°F)
(b) Vehicle speed is more than 10 km/h (6.2 mph)
Fuel temperature sensor

INSPECTION PROCEDURE

УКАЗАНИЕ:
  1. If DTC P0180, P0182, or P0183 is set at the same time as P0168, the fuel temperature sensor may be open or shorted. Troubleshoot those DTCs first.
  2. Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.
1.CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0168)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch on (IG) and turn the tester on.

  1. Enter the following menus: Powertrain / Engine and ECT / DTC.

  1. Read the DTCs.

    Result:

    Result
    		Proceed to
    DTC P0168 is output
    		A
    DTC P0168 and other DTCs are output
    		B
    УКАЗАНИЕ:
    If DTCs other than P0168 are output, perform troubleshooting for those codes first.


B
GO TO DTC CHART (Нажмите здесь)
A

REPLACE SUPPLY PUMP ASSEMBLY (FUEL TEMPERATURE SENSOR) (Нажмите здесь)