DTC P0801 Reverse Inhibit Control Circuit: Wiring Diagram

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

Shift lock control system. Refer to appropriate SYSTEM WIRING DIAGRAM article.

Fig 1: Shift Lock Control System - Wiring Diagram (Reverse Inhibit Control)

Courtesy of SUBARU OF AMERICA, INC.

DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK SHIFT LOCK SOLENOID. Forcibly activate the body integrated unit to check the operation of shift lock solenoid. Refer to FUNCTION CHECK . Move the shift lever without depressing the brake pedal.	Does the shift lever move?	Go to step 2 .	Go to step 3 .
2 CHECK OUTPUT SIGNAL OF BODY INTEGRATED UNIT. Display the following items using Subaru Select Monitor. Refer to READ CURRENT DATA . Key-lock warning SW Shift position PSW Stop light switch With the brake pedal depressed, shift the select lever to "P" range.	Do the units of measure of items displayed change?	Go to step 3 .	Check the circuits of the items whose values do not change.
3 CHECK HARNESS CONNECTOR BETWEEN BODY INTEGRATED UNIT AND SHIFT LOCK SOLENOID. Measure the harness resistance between the body integrated unit and chassis ground. Connector & terminal (B281) No. 5 - Chassis ground:	Is the resistance 1 MΩ or more?	Go to step 4 .	Repair the short circuit of harness between body integrated unit and shift lock solenoid connector.
4 CHECK HARNESS BETWEEN SHIFT LOCK SOLENOID AND CHASSIS GROUND TERMINAL. Measure the resistance of harness between shift lock solenoid connector and chassis ground. Connector & terminal (B116) No. 4 - Chassis ground:	Is the resistance less than 1 Ω?	Go to step 5 .	Repair the open circuit of the harness between the shift lock solenoid connector and chassis ground terminal.
5 CHECK SHIFT LOCK SOLENOID. Measure the resistance between the shift lock solenoid connector terminals. Connector & terminal (B116) No. 3 - No. 4:	Is the resistance 12 - 18 Ω?	Go to step 6 .	Replace the shift lock solenoid. Refer to AT SHIFT LOCK SOLENOID AND "P" RANGE SWITCH .
6 CHECK OUTPUT SIGNAL OF BODY INTEGRATED UNIT. Connect all connectors. Turn the ignition switch to ON. Set the select lever to "D" range. Measure the voltage between body integrated unit and chassis ground. Connector & terminal (B281) No. 5 (+) - Chassis ground (-):	Is the voltage 10.5 V or more?	Go to step 7 .	Go to step 8 .
7 CHECK OUTPUT SIGNAL OF BODY INTEGRATED UNIT. Lift up the vehicle. Start the engine. Shift the select lever to "D" range and slowly increase vehicle speed to over 20 km/h (12 MPH). NOTE: The speed difference between front and rear wheels lights the ABS warning light or the VDC warning light, but this does not indicate a malfunction. If the warning light is illuminated, clear the memory of ABS or VDC after completing AT control diagnosis. Refer to CLEAR MEMORY MODE . Measure the voltage between body integrated unit and chassis ground. Connector & terminal (B281) No. 5 (+) - Chassis ground (-):	Is the voltage less than 1 V?	Check the harnesses or connectors in reverse inhibitor control circuit, and repair the defective part.	Go to step 8 .
8 CHECK FOR POOR CONTACT.	Is there poor contact of the reverse inhibitor control circuit?	Repair the poor contact.	Replace the body integrated unit. Refer to BODY INTEGRATED UNIT .