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Home >> Subaru >> 2013 >> Legacy Premium, Automatic CVT Trans >> Repair and Diagnosis >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> SUBARU Eyesight System (Driver Assist) (Diagnostics) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC B2814 Power Supply Volt Error >> Diagnostic Procedure

Diagnostic Procedure

DIAGNOSTIC PROCEDURE

Step Check Yes No
1 CHECK GENERATOR. 
  1. Start the engine and idle for a while.
  2. Measure the voltage between generator terminal B and chassis ground.

    Connector & terminal 

    Generator terminal B (+) - Chassis ground (-): 

Is the voltage 10 V or more? Go to step . Check the generator.
2 CHECK BATTERY TERMINAL. 
Turn the ignition switch to OFF.
Is the battery terminal connected securely? Go to step . Tighten the battery terminal securely.
3 CHECK HARNESS (POWER SUPPLY CIRCUIT). 
  1. Disconnect the stereo camera.
  2. Turn the ignition switch to ON.
  3. Measure the voltage between harness connector of stereo camera and chassis ground.

    Connector & terminal 

    (R137) No. 6 (+) - Chassis ground (-): 

    (R137) No. 16 (+) - Chassis ground (-): 

Is the voltage 10 V or more? Go to step . Check the power supply system circuit, and if any fault is found, repair the defective parts or replace the harness.
4 CHECK HARNESS (GROUND CIRCUIT). 
Measure the resistance between stereo camera and chassis ground.
Connector & terminal 
(R137) No. 7 - Chassis ground: 
(R137) No. 15 - Chassis ground: 
Is the resistance less than 10 Ω? Go to step . Check the ground system circuit, and if any fault is found, repair the defective parts or replace the harness.
5 CHECK CONNECTOR. 
Check stereo camera connector.
Is the connector connected securely? Go to step . Repair or replace the connector.
6 CHECK STEREO CAMERA. 
  1. Connect all connectors securely.
  2. Clear the memory.
  3. Read the DTC.
Is the same DTC (DTC B2814 or B2815) displayed? Replace the stereo camera. < Refer to REMOVAL , Stereo Camera. > Temporary poor contact occurs.