DTC P1817 Sport Mode Switch Circuit (Manual Switch)

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

DTC DETECTING CONDITION:

Input signal circuit of manual mode switch is open or shorted.

TROUBLE SYMPTOM:

Manual mode can not be set.
"SPORT" light illuminates when shifting to "N" ->"D" range.

WIRING DIAGRAM:

Fig 1: Sport Mode Switch - Wiring Diagram

G05019851

DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK BODY INTEGRATED UNIT. Connect the Subaru Select Monitor to the data link connector. Turn the ignition switch to ON. (engine OFF) Read the DTC of body integrated unit using Subaru Select Monitor. < Ref. to OPERATION , Subaru Select Monitor. >	Is DTC displayed?	Perform the diagnosis according to DTC.	Go to step 2.
2 CHECK BODY INTEGRATED UNIT INPUT SIGNAL. Shift the select lever to "P" range. Read the TIP mode SW data of body integrated unit using Subaru Select Monitor. < Ref. to OPERATION , Subaru Select Monitor. >	Is OFF displayed?	Go to step 3.	Go to step 7.
3 CHECK BODY INTEGRATED UNIT INPUT SIGNAL. Shift the select lever from "P" to "D" range. Read the TIP mode SW data of body integrated unit using Subaru Select Monitor. < Ref. to OPERATION , Subaru Select Monitor. >	Is the indication on each range OFF?	Go to step 4.	Replace the select lever assembly. < Ref. to SELECT LEVER . >
4 CHECK BODY INTEGRATED UNIT INPUT SIGNAL. Shift the select lever to manual mode. Shift the select lever to other than "D" range. Read the TIP mode SW data of body integrated unit using Subaru Select Monitor. < Ref. to OPERATION , Subaru Select Monitor. >	Is OFF displayed?	Go to step 5.	Replace the select lever assembly. < Ref. to SELECT LEVER . >
5 CHECK DTC OF TCM.	Is DTC of Transmission Range Sensor Circuit (PRNDL Input) and AT CAN communication circuit displayed?	Perform the diagnosis according to each DTC.	Go to step 6.
6 CHECK INPUT SIGNAL FROM TCM. Shift the select lever from "P" to "D" range. Read the TIP mode SW data of TCM using Subaru Select Monitor. < Ref. to OPERATION , Subaru Select Monitor. >	Is the indication on each range OFF?	Even if the SPORT indicator light blinks, the system is in normal condition. A temporary poor contact of connector or harness may be the cause.	Replace the TCM. < Ref. to TRANSMISSION CONTROL MODULE (TCM) . >
7 CHECK HARNESS BETWEEN BODY INTEGRATED UNIT AND MANUAL MODE SWITCH. Turn the ignition switch to OFF. Disconnect harness connector from body integrated unit and select lever. Measure the harness resistance between the body integrated unit and chassis ground. Connector & terminal (B281) No. 27 - Chassis ground:	Is the resistance more than 1 MΩ?	Go to step 8.	Repair the short circuit of harness between body integrated unit and manual mode.
8 CHECK MANUAL MODE SWITCH. Shift the select lever to "P" range. Measure the resistance between harness connector terminals of manual mode switch. Terminals (B116) No.9 - No.8	Is the resistance more than 1 MΩ?	Check the body integrated unit.	Replace the select lever assembly. < Ref. to SELECT LEVER . >