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Home >> Subaru >> 2013 >> Legacy Premium, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 16 (Automatic Transaxle - Diagnostics) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P1817 Sports Mode Switch Circuit (Manual Switch) >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2013 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC PROCEDURE

Step Check Yes No
1 CHECK GROUND CIRCUIT OF SPORT/MANUAL MODE SWITCH. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the connector from sport/manual mode switch.
  3. Measure the resistance of harness between sport/manual mode switch connector and chassis ground.

    Connector & terminal 

    (B117) No. 8 - Chassis ground: 

Is the resistance less than 1 Ω? Go to step . Repair the open circuit of the harness between the sport/manual mode switch and chassis ground.
2 CHECK SPORT/MANUAL MODE SWITCH. 
Measure the resistance between sport/manual mode switch terminals.
Connector & terminal 
(B117) No. 7 - No. 8: 
Is the resistance 1 MΩ or more? Go to step . Replace the select lever assembly. < Refer to SELECT LEVER . >
3 CHECK SPORT/MANUAL MODE SWITCH. 
  1. Shift the select lever to sport mode.
  2. Measure the resistance between sport/manual mode switch terminals.

    Connector & terminal 

    (B117) No. 7 - No. 8: 

Is the resistance less than 1 Ω? Go to step . Replace the select lever assembly. < Refer to SELECT LEVER . >
4 CHECK HARNESS CONNECTOR BETWEEN TCM AND SPORT/MANUAL MODE SWITCH. 
  1. Disconnect the connector from TCM.
  2. Measure the resistance of harness between TCM connector and sport/manual mode switch connector.

    Connector & terminal 

    (B117) No. 7 - (B54) No. 17: 

Is the resistance less than 1 Ω? Go to step . Repair the open circuit of harness between TCM and sport/manual mode switch connector.
5 CHECK HARNESS CONNECTOR BETWEEN TCM AND SPORT/MANUAL MODE SWITCH. 
  1. Disconnect the connector from TCM.
  2. Measure the resistance of harness between TCM connector and chassis ground.

    Connector & terminal 

    (B117) No. 7 - Chassis ground: 

Is the resistance 1 MΩ or more? Go to step . Repair the short circuit of harness between TCM and sport/manual mode switch connector.
6 CHECK INPUT SIGNAL FOR TCM. 
  1. Connect the connector to TCM and sport/manual mode switch.
  2. Turn the ignition switch to ON.
  3. Shift the select lever to normal mode.
  4. Measure the voltage of signal to TCM.

    Connector & terminal 

    (B54) No. 17 (+) - Chassis ground (-): 

Is the voltage 10 V or more? Go to step . Replace the TCM. < Refer to TRANSMISSION CONTROL MODULE (TCM) . >
7 CHECK FOR POOR CONTACT.  Is there poor contact of the sport/manual mode switch circuit? Repair the poor contact. Replace the TCM. < Refer to TRANSMISSION CONTROL MODULE (TCM) . >