Subaru Legacy BN/BS (2015-2019) Service Manual: General description

Dtc b1431 in-vehicle (post evaporator) temperature sensor circuit short-circuit

DTC DETECTING CONDITION:In-vehicle sensor circuit is shorted.TROUBLE SYMPTOM:In-vehicle air temperature is falsely recognized as 25°C (77°F), and the compartment temperature is adjusted. ...

Preparation tool

1. SPECIAL TOOLILLUSTRATIONTOOL NUMBERDESCRIPTIONREMARKS — (Newly adopted tool)SUBARU SELECT MONITOR 4Used for setting of each function and troubleshooting for electrical system.NOTE:For detailed op ...

Other materials:

Removal
1. Disconnect the ground terminal from battery sensor. NOTE2. Remove the arm assembly - windshield wiper. Front Wiper Arm > REMOVAL3. Remove the cowl panel - side and the cowl panel assembly. Cowl Panel > REMOVALCAUTION:Before removing the cowl panel, use an air blower and nylon brush to sweep gr ...