DTC B224A: Backup Camera

DTC detecting condition:

Detected when the synchronization error occurs in the condition of the picture input.

Trouble symptom:

Camera image does not appear. (Blue screen, etc.)

Wiring diagram:

Rearview camera system Ref. to WIRING SYSTEM>REARVIEW CAMERA SYSTEM>WIRING DIAGRAM .

Audio and navigation system Ref. to WIRING SYSTEM>AUDIO AND NAVIGATION SYSTEM>WIRING DIAGRAM .

Back-up light system Ref. to WIRING SYSTEM>BACK-UP LIGHT SYSTEM>WIRING DIAGRAM .

Without front view monitor (sedan model)

Courtesy of SUBARU OF AMERICA, INC.
Without front view monitor (OUTBACK model)

Courtesy of SUBARU OF AMERICA, INC.
With front view monitor

Courtesy of SUBARU OF AMERICA, INC.

CAUTION: Before performing diagnosis, refer to "CAUTION" in "General Description". Ref. to COCKPIT CONTROL (DIAGNOSTICS)>General Description>CAUTION .

CHECK DATA MONITOR .
Using the Subaru Select Monitor, check the following items in the [Data Monitor] of [Cockpit Control]. Ref. to Cockpit Control (Diagnostics)>Data Monitor .
- Rear camera connection state
Is [ON] displayed?

Yes: Go to 2 .

No: Go to 3 .
CHECK DATA MONITOR .
Using the Subaru Select Monitor, check the following items in the [Data Monitor] of [Cockpit Control]. Ref. to Cockpit Control (Diagnostics)>Data Monitor .
- Reverse connection state
Is [ON] displayed when the shift lever is set to the reverse range?

Yes: Go to 3 .

No: Go to 6 .
CHECK HARNESS (OPEN CIRCUIT) .
1. Turn the ignition switch to OFF.
2. Disconnect the cockpit control module connector (i101).
3. Disconnect the connector from the rearview camera (Td32), (Db37) or camera control module.
4. Using the tester, measure the resistance of harness between the cockpit control module connector (i101) and the rearview camera connector (Td32), (Db37) or camera control module connector (B79).
  Connector and terminal
  
  Without front view monitor (sedan model)
  
  (i101) No. 28 - (Td32) No. 1:
  
  (i101) No. 29 - (Td32) No. 2:
  
  (i101) No. 27 - (Td32) No. 3:
  
  (i101) No. 26 - (Td32) No. 4:
  
  Without front view monitor (OUTBACK model)
  
  (i101) No. 28 - (Db37) No. 4:
  
  (i101) No. 29 - (Db37) Shield connector:
  
  (i101) No. 27 - (Db37) No. 2:
  
  (i101) No. 26 - (Db37) No. 1:
  
  With front view monitor
  
  (i101) No. 28 - (B79) No. 7:
  
  (i101) No. 29 - (B79) No. 27:
Is the resistance less than 1 Ω?

Yes: Go to 4 .

No: Repair the open circuit in harness between the cockpit control module connector and the rearview camera connector or camera control module connector.
CHECK HARNESS (GROUND SHORT CIRCUIT) .
Using the tester, measure the resistance of harness between cockpit control module connector (i101) and chassis ground.

Connector and terminal

Without front view monitor

(i101) No. 28 - Chassis ground:

(i101) No. 29 - Chassis ground:

(i101) No. 27 - Chassis ground:

(i101) No. 26 - Chassis ground:

With front view monitor

(i101) No. 28 - Chassis ground:

(i101) No. 29 - Chassis ground:

Is the resistance 1 MΩ or more?

Yes: Go to 5 .

No: Repair the short circuit to ground in harness between the cockpit control module connector and the rearview camera connector or camera control module connector.
CHECK HARNESS (SHORT CIRCUIT TO POWER SUPPLY) .
1. Turn the ignition switch to ON.
2. Using the tester, measure the voltage between cockpit control module connector (i101) and chassis ground. (With each connector disconnected)
  Connector and terminal
  
  Without front view monitor
  
  (i101) No. 28 (+) - Chassis ground (-):
  
  (i101) No. 29 (+) - Chassis ground (-):
  
  (i101) No. 27 (+) - Chassis ground (-):
  
  (i101) No. 26 (+) - Chassis ground (-):
  
  With front view monitor
  
  (i101) No. 28 (+) - Chassis ground (-):
  
  (i101) No. 29 (+) - Chassis ground (-):
Is the voltage less than 1 V?

Yes: Go to 6 .

No: Repair the short to power supply in harness between the cockpit control module connector and the rearview camera connector or camera control module connector.
CHECK LAN SYSTEM .
Read the DTC of [Cockpit Control] using the Subaru Select Monitor. Ref. to Cockpit Control (Diagnostics)>Diagnostic Trouble Code (DTC) .

Is DTC U**** displayed? (Current malfunction)

Yes: Perform the inspection according to the diagnosis for LAN system. Ref. to LAN SYSTEM (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE .

No: Go to 7 .
CHECK REARVIEW CAMERA .
Check the rearview camera according to the instructions of rearview camera operation manual.

Is there any fault?

Yes: For models without front view monitor, replace the rear view camera. Ref. to ENTERTAINMENT & MONITORING>CAMERA .

For models with front view monitor, perform the diagnosis for the camera control module. Ref. to MULTI VIEW MONITOR (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE .

No: Replace the cockpit control module. Ref. to ENTERTAINMENT & MONITORING>COCKPIT DISPLAY .