DTC B2233: Front Camera Circuit Open

DTC detecting condition: 

Detected when front camera abnormality is detected.

Trouble symptom: 

Front camera does not work.

Wiring diagram: 

Front view monitoring system Refer to WIRING SYSTEM>FRONT VIEW MONITOR .

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK DTC. 
   1. Using the Subaru Select Monitor, perform the clear memory for «Multi-function Display».
   2. Turn the ignition switch to OFF.
   3. Disconnect the MFD connector and reconnect it.
   4. Turn the ignition switch to ON.
   5. Using the Subaru Select Monitor, read DTC of «Multi-function Display».

   Is DTC B2233 displayed? (Current malfunction)

   Yes:  Go to  2.

   No:  Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

2. CHECK HARNESS (SHORT CIRCUIT TO POWER SUPPLY). 
   1. Disconnect the front camera connector and MFD connector.
   2. Turn the ignition switch to ON.
   3. Use a tester to measure the voltage between the terminals.

      Connector & terminal 

      (i122) No. 2 (+) - Chassis ground (-):

   Is the voltage less than 1 V?

   Yes:  Go to  3.

   No:  Repair the short circuit of harness or replace harness.

3. CHECK HARNESS (OPEN CIRCUIT). 

   Use a tester to measure the resistance between front camera connector and MFD connector.

   Connector & terminal 

   (i122) No. 2 - (F166) No. 2:

   Is the resistance 10 Ω or less?

   Yes:  Go to  4.

   No:  Repair or replace the open circuit of harness.

4. CHECK DTC. 
   1. Replace the front camera.
   2. Read the DTC relating the MFD using the Subaru Select Monitor.

   Is DTC B2233 displayed? (Current malfunction)

   Yes:  Replace the MFD. Refer to INSTRUMENTATION/DRIVER INFO>MULTI-FUNCTION DISPLAY (MFD) .

   No:  Malfunction occurred in the front camera.