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Home >> Subaru >> 2008 >> Outback Base, Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Engine (Diagnostics) (H4SO) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P1518 Starter Switch Circuit Low Input >> Wiring Diagram

DTC P1518 Starter Switch Circuit Low Input: Wiring Diagram

Fig 1: Starter Switch Circuit Low Input - Wiring Diagram
G05339855Courtesy of SUBARU OF AMERICA, INC.
DIAGNOSTIC PROCEDURE CHART

Step Check Yes No
1 CHECK FOR ANY OTHER DTC ON DISPLAY.  Is any other DTC displayed? Check DTC using "List of Diagnostic Trouble Code (DTC)". <Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . > Go to step 2. 
2 CHECK HARNESS BETWEEN ECM AND IGNITION SWITCH. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the connector from ECM and ignition switch.
  3. Measure the resistance of harness between the ECM and ignition switch connector.

    Connector & terminal 

    (B136) No. 32 - (B72) No. 2: 

NOTE: For the MT model, measure while stepping on the clutch pedal.
 Is the resistance less than 1 Ω? Go to step 3. 
NOTE: Check the following item and repair or replace if necessary.
  • Open circuit of harness between the ECM and ignition coil switch connector
  • Blown out of fuse (No. 21)
  • Poor contact of the clutch switch connector (MT model)
  • Poor contact of the clutch switch (MT model)
3 CHECK HARNESS BETWEEN ECM AND IGNITION SWITCH. 
Measure the resistance between ECM and chassis ground.
Connector & terminal 
(B136) No. 32 - Chassis ground: 
NOTE: For the MT model, measure while stepping on the clutch pedal.
 Is the resistance 1 MΩ or more? Repair the ground short circuit of harness between the ECM and ignition switch connector. Contact your SOA service center.
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