DTC P0852 Neutral Switch Input Circuit High (Mt Model): Wiring Diagram

Engine electrical system, 2.5 L model (without push button start). See appropriate SYSTEM WIRING DIAGRAM article.
Engine electrical system, 2.5 L model (with push button start). See appropriate SYSTEM WIRING DIAGRAM article.

Fig 1: Park/Neutral Switch Input - Circuit Diagram (AT Model)
Courtesy of SUBARU OF AMERICA, INC.

DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK INPUT SIGNAL OF ECM. Turn the ignition switch to ON. Place the shift lever in neutral. Measure the voltage between ECM and chassis ground. Connector & terminal (B137) No. 16 (+) - Chassis ground (-):	Is the voltage less than 1 V?	Repair the poor contact of ECM connector.	Go to step 2 .
2 CHECK HARNESS BETWEEN ECM AND NEUTRAL POSITION SWITCH CONNECTOR. Turn the ignition switch to OFF. Disconnect the connectors from ECM and neutral position switch. Measure the resistance of harness between ECM and neutral position switch connector. Connector & terminal (B137) No. 16 - (B25) No. 2: (B137) No. 4 - (B25) No. 1:	Is the resistance less than 1 Ω?	Go to step 3 .	Repair the harness and connector. NOTE: In this case, repair the following item: Open circuit in harness between ECM and neutral position switch connector Poor contact of coupling connector
3 CHECK NEUTRAL POSITION SWITCH. Place the shift lever in neutral. Measure the resistance between neutral position switch terminals. Terminals No. 1 - No. 2:	Is the resistance less than 1 Ω?	Repair the poor contact of neutral position switch connector.	Replace the neutral position switch. Refer to SWITCHES AND HARNESS .