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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 LAN SYSTEM. 
Perform the diagnosis for LAN system. < Refer to BASIC DIAGNOSTIC PROCEDURE . >		 Is there any fault in LAN system? Perform the diagnosis according to DTC for LAN system. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . > Go to step 2  .
2 CHECK REVERSE SIGNAL USING SUBARU SELECT MONITOR. 
  1. Select "Current Data Display & Save" on the Subaru Select Monitor.
  2. Read the indication of reverse signal.
 Is "OFF" displayed when the shift lever is placed in any position other than reverse, and is "ON" displayed in reverse position? Go to step 5  . Go to step 3  .
3 CHECK BACK-UP LIGHT ILLUMINATION. 
  1. Turn the ignition switch to ON.
  2. Place the shift lever in reverse position.
 Does the back-up light illuminate? Go to step 4  . Repair the back-up light circuit.
4 CHECK HARNESS BETWEEN BODY INTEGRATED UNIT AND BACK-UP LIGHT SWITCH. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the connectors from body integrated unit and back-up light switch.
  3. Measure the resistance of harness between body integrated unit and back-up light switch connector.

    Connector & terminal 

    (B280) No. 18 - (B24) No. 1: 

 Is the resistance less than 1 Ω? Replace the backup light switch. < Refer to SWITCHES AND HARNESS . > Repair the harness between body integrated unit and back-up light switch connector.
5 CHECK VDCCM&H/U. 
  1. Connect all connectors.
  2. Clear the memory. < Refer to CLEAR MEMORY MODE . >
  3. Perform the Inspection Mode. < Refer to INSPECTION MODE . >
  4. Read the DTC.
 Is the same DTC displayed? Replace the VDCCM only. < Refer to REPLACEMENT , VDC Control Module and Hydraulic Control Unit (VDCCM&H/U). > Go to step 6  .
6 CHECK OTHER DTC DETECTION.  Is any other DTC displayed? Perform the diagnosis according to DTC. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . > Temporary poor contact occurs.
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