DTC P0851 Neutral Switch Input Circuit Low (Mt Model): Wiring Diagram

WARNING: This page is about a different variant/trim than selected.

Fig 1: Neutral Switch Input - Wiring Diagram

G06647819

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 a position other than neutral. Measure the voltage between ECM and chassis ground. Connector & terminal (B136) No. 35 (+) - Chassis ground (-):	Is the voltage 10 V or more?	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 between ECM and chassis ground. Connector & terminal (B136) No. 35 - Chassis ground:	Is the resistance 1 MΩ or more?	Replace the neutral position switch. Ref. to SWITCHES AND HARNESS .	Repair the short circuit to ground harness between ECM and neutral position switch connector.