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.