DTC U1651 Lost Communication With Meter (UART): Wiring Diagram

Multi-function display (MFD) system <Ref. to RADIO , Multi-function Display (MFD) System.>

Fig 1: Multi-Function Display Wiring Diagram

G09484522

Courtesy of SUBARU OF AMERICA, INC.

DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK LAN SYSTEM . Read the DTC of the LAN system using the Subaru Select Monitor. <Ref. to OPERATION , Read Diagnostic Trouble Code (DTC).>	Is DTC displayed?	Perform the diagnosis according to DTC.	Go to step 2 .
2 CHECK CONNECTOR . Disconnect the MFD connector and meter connector. Connect the disconnected connectors. Read the DTC of the MFD using the Subaru Select Monitor.	Is DTC U1651 a current malfunction?	Go to step 3 .	There was poor contact of connector.
3 CHECK HARNESS . Disconnect the MFD connector and meter connector. Using the tester, measure the resistance between terminals. Connector & terminal (i10) No. 28 - (i122) No. 9:	Is the resistance 10 Ω or less?	Go to step 4 .	Repair the open circuit of harness or replace harness.
4 CHECK HARNESS . Using the tester, measure the resistance between terminals. Connector & terminal (i122) No. 9 - Chassis ground:	Is the resistance 10 Ω or less?	Repair the short circuit of harness or replace harness.	Go to step 5 .
5 CHECK COMBINATION METER . Replace the combination meter. <Ref. to COMBINATION METER .> Read the DTC of the MFD using the Subaru Select Monitor.	Is DTC U1651 a current malfunction?	Go to step 6 .	There was something wrong with the meter.
6 CHECK COMBINATION METER . Replace the current combination meter with the original combination meter. Replace the MFD. <Ref. to MULTI-FUNCTION DISPLAY (MFD) .> Read the DTC of the MFD using the Subaru Select Monitor.	Is DTC U1651 a current malfunction?	Replace the meter. <Ref. to COMBINATION METER .>	There was an abnormality in MFD.