DTC P0182 Fuel Temperature Sensor "A" Circuit Low Input: Wiring Diagram

Fig 1: Fuel Temperature Sensor - Wiring Diagram

Courtesy of SUBARU OF AMERICA, INC.

DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK CURRENT DATA  . Start the engine. Read the data of fuel temperature sensor signal using Subaru Select Monitor. NOTE: For detailed operation procedures, refer to "READ CURRENT DATA FOR ENGINE". Ref. to SUBARU SELECT MONITOR .	Is the temperature 120°C (248°F) or higher?	Go to step 2  .	Even if DTC is detected, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again. NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.
2 CHECK HARNESS BETWEEN ECM AND FUEL TEMPERATURE SENSOR CONNECTOR  . Turn the ignition switch to OFF. Disconnect the connector from ECM and fuel temperature sensor. Measure the resistance between ECM and chassis ground. Connector & terminal  (B136) No. 23 - Chassis ground:	Is the resistance 1 MΩ or more?	Replace the fuel temperature sensor. Ref. to FUEL TEMPERATURE SENSOR .	Repair the ground short circuit of harness between ECM and fuel pump connector.