DTC B2259: Center Information Display Communication Open

DTC detecting condition:

Detected when LVDS communication with the center information display is not possible.

Trouble symptom:

Center information display cannot be displayed.

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

Wiring diagram:

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

Courtesy of SUBARU OF AMERICA, INC.

CHECK DTC .
1. Using the Subaru Select Monitor, perform the clear memory of [Cockpit Control]. Ref. to COMMON (DIAGNOSTICS)>CLEAR MEMORY .
2. Turn the ignition switch OFF ↔ ON.
3. Read the DTC of [Cockpit Control] using the Subaru Select Monitor. Ref. to COCKPIT CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
Is DTC B2259 displayed? (Current code)

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 FUSE .
1. Turn the ignition switch to OFF.
2. Check fuse No. 24 in the main fuse box, and fuses No. 9 and 33 in the fuse and relay box. Ref. to WIRING SYSTEM>AUDIO AND NAVIGATION SYSTEM>WIRING DIAGRAM .
Is the check result OK?

Yes: Go to 3.

No: Replace the fuse. If the replaced fuse blows out easily, repair the ground short circuit in the harness between the cockpit control module and fuse.
CHECK CONNECTOR .
Check the connecting condition of the cockpit control module connector.

Is the connector connected securely?

Yes: Go to 4.

No: Connect the connector securely. Or repair the poor contact of connector.
CHECK CONNECTOR .
Check the connector or terminal of the cockpit control module for poor contact.

Is the check result OK?

Yes: Go to 5.

No: Repair the harness or replace the components.
CHECK POWER SUPPLY CIRCUIT .
1. Disconnect the cockpit control module connector (i102). Ref. to ENTERTAINMENT & MONITORING>COCKPIT DISPLAY .
2. Turn the ignition switch to ON.
3. Using the tester, measure the voltage between cockpit control module connector and chassis ground.
  Connector & terminal
  
  (i102) No. 3 (+) - Chassis ground (-):
  
  (i102) No. 4 (+) - Chassis ground (-):
  
  (i102) No. 9 (+) - Chassis ground (-):
Is the voltage 12 V or more?

Yes: Go to 7.

No: Go to 6.
CHECK HARNESS (POWER SUPPLY) (OPEN CIRCUIT) .
1. Turn the ignition switch to OFF.
2. Disconnect the cockpit control module connector (i102). Ref. to ENTERTAINMENT & MONITORING>COCKPIT DISPLAY>REMOVAL .
3. Measure the resistance between cockpit control module connector (i102) and F/B and M/B.
  Connector & terminal
  
  (i102) No. 3 - F/B fuse No. 9:
  
  (i102) No. 4 - M/B fuse No. 24:
  
  (i102) No. 9 - F/B fuse No. 33:
Is the resistance 1 Ω or less?

Yes: Go to 7.

No: Repair or replace the open circuit of harness.
CHECK HARNESS (GROUND) .
Measure the resistance between cockpit control module connector (i102) and chassis ground.

Connector & terminal

(i102) No. 7 - Chassis ground:

Is the resistance 1 Ω or less?

Yes: Go to 8.

No: Repair or replace the open circuit of harness.
CHECK BATTERY .
Check the battery. Ref. to STARTING/CHARGING SYSTEMS (H4DO)>BATTERY>INSPECTION .

Is the check result OK?

Yes: Go to 9.

No: Charge or replace the battery.
CHECK CONNECTOR AND CABLE .
Visually check the connector, terminal or cable body of the cockpit control module and center information display.

Is the check result OK?

Yes: Go to 10.

No: Reconnect the connector.

NOTE: Replace the cable if the cable or connector is faulty.
CHECK POWER SUPPLY VOLTAGE (BETWEEN COCKPIT CONTROL MODULE - CENTER INFORMATION DISPLAY) .
1. Turn the ignition switch to OFF.
2. Disconnect the center information display connector.
3. Turn the ignition switch to ON.
4. Using a tester, measure the voltage between center information display connector and chassis ground.
  Connector & terminal
  
  (Ad11) No. 4 - Chassis ground (-):
  
  (Ad11) No. 8 - Chassis ground (-):
Is the voltage 12 V or more?

Yes: Go to 12.

No: Go to 11.
CHECK HARNESS (OPEN CIRCUIT) .
1. Turn the ignition switch to OFF.
2. Disconnect the center information display and the cockpit control module connector. Ref. to ENTERTAINMENT & MONITORING>COCKPIT DISPLAY>REMOVAL .
3. Measure the resistance between the cockpit control module connector (Ad9) and the center information display connector (Ad11).
  Connector & terminal
  
  (Ad9) No. 1 - (Ad11) No. 4:
  
  (Ad9) No. 3 - (Ad11) No. 8:
Is the resistance 1 Ω or less?

Yes: Replace the cockpit control module. Ref. to ENTERTAINMENT & MONITORING>COCKPIT DISPLAY>REMOVAL .

No: Repair or replace the open circuit of harness.
CHECK OPERATION .
1. Connect all connectors.
2. Turn the ignition switch to ACC and the power supply switch of the unit to ON.
Does the power turn ON?

Yes: Currently no failure is found.

No: Go to 13.
CHECK CENTER INFORMATION DISPLAY .
1. Turn the ignition switch to OFF.
2. Replace the center information display with a new or properly functioning part. Ref. to ENTERTAINMENT & MONITORING>COCKPIT DISPLAY .
3. Turn the ignition switch to ON.
4. Using the Subaru Select Monitor, perform the clear memory of [Cockpit Control]. Ref. to COMMON (DIAGNOSTICS)>CLEAR MEMORY .
5. Turn the ignition switch OFF ↔ ON.
6. Read the DTC of [Cockpit Control] using the Subaru Select Monitor. Ref. to COCKPIT CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
Is DTC B2259 displayed? (Current code)

Yes: Return the center information display to its original position, and replace the cockpit control module. Ref. to ENTERTAINMENT & MONITORING>COCKPIT DISPLAY .

No: Center information display had a failure.