DTC B2233: Front Camera Circuit Open

WARNING: This page is about a different car, the 2021 Subaru Ascent. However, it is still accessible from the selected car via links, so may be relevant.

DTC detecting condition:

Detected when front view monitor camera abnormality is detected.

Trouble symptom:

Front view monitor camera does not work.

Wiring diagram:

Front view monitoring system Ref. to WIRING SYSTEM>Front View Monitor>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

CAUTION: Before performing diagnosis, refer to "CAUTION" in "General Description". Ref. to MULTI-FUNCTION DISPLAY (DIAGNOSTICS)>General Description>CAUTION .

CHECK DTC .
1. Using the Subaru Select Monitor, perform the clear memory of [Multi-Function Display]. Ref. to COMMON (diag)>CLEAR MEMORY .
2. Turn the ignition switch to OFF.
3. Disconnect the MFD connector and reconnect it.
4. Turn the ignition switch to ON.
5. Read the DTC of [Multi-Function Display] using the Subaru Select Monitor. Ref. to MULTI-FUNCTION DISPLAY (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
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.

NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.
CHECK HARNESS (SHORT CIRCUIT TO POWER SUPPLY) .
1. Disconnect the front view monitor camera connector and MFD connector.
2. Turn the ignition switch to ON.
3. Using a tester, measure the voltage between the MFD connector and chassis ground.
  Connector & terminal
  
  (i122) No. 2 (+) - Chassis ground (-):
Is the voltage 1.5 V or less?

Yes : Go to 3.

No : Repair or replace the short circuit of the harness.
CHECK HARNESS (OPEN CIRCUIT) .
Using a tester, measure the resistance between front view monitor camera connector and MFD connector.

Connector & terminal

(i122) No. 2 - (B284) No. 1:

Is the resistance less than 10 Ω?

Yes : Go to 4.

No : Repair or replace the open circuit of harness.
CHECK DTC .
1. Replace the front view monitor camera. Ref. to ENTERTAINMENT & MONITORING>Camera>REMOVAL>FRONT .
2. Read the DTC of [Multi-Function Display] using the Subaru Select Monitor. Ref. to MULTI-FUNCTION DISPLAY (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
Is DTC B2233 displayed? (Current malfunction)

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

No : Malfunction occurred in the front view monitor camera.