DTC U1650 Invalid Data Received From Meter (UART): Wiring Diagram

Clearance Light and Illumination Light System <Ref. to INTERIOR LIGHTS , Clearance Light and Illumination Light System.>

Fig 1: Clearance Light And Illumination Light System Wiring Diagram

G10270911

Courtesy of SUBARU OF AMERICA, INC.

DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK LAN SYSTEM . Read the DTC of body integrated unit and LAN system using Subaru Select Monitor. <Ref. to READ DIAGNOSTIC TROUBLE CODE (DTC) .> <Ref. to READ DIAGNOSTIC TROUBLE CODE (DTC) .>	Is any DTC other than U1650 displayed?	Perform the diagnosis according to DTC.	Go to step 2 .
2 CHECK FUSE . Check the fuse No. 31 in the fuse & relay box.	Is the fuse OK?	Go to step 3 .	Replace the fuse. When the fuse is blown easily, check the wiring.
3 CHECK HARNESS . Disconnect the body integrated unit connector. Turn the ignition switch OFF → ACC. Measure the voltage between body integrated unit connector and chassis ground using tester. Connector & terminal (B280) No. 32 (+) - Chassis ground (-):	Is the voltage 10 V or more?	Go to step 4 .	Repair the ACC power supply circuit of the body integrated unit.
4 CHECK CURRENT DATA OF INTEGRATED UNIT . Connect the Subaru Select Monitor. Turn the ignition switch to ON. Check the current data «ACC voltage» of the body integrated unit. <Ref. to READ CURRENT DATA .>	Is the voltage 10 V or more?	Go to step 5 .	Inspect and correct the body integrated unit connector. If there is no abnormality, replace the body integrated unit. <Ref. to BODY INTEGRATED UNIT .> (There may be a poor contact in the body integrated unit connector ((B280) terminal No. 32), or an internal malfunction of the integrated unit.) (If the current data indicates ACC voltage value ≈ Battery voltage, there will be no malfunction up to inside of the integrated unit. If U1650 is still detected in this condition as current malfunction, perform step 5 and subsequent procedures.)
5 CHECK CONNECTOR . Disconnect the MFD connector and the combination meter connector. Connect the disconnected connectors. Read the DTC of the MFD using the Subaru Select Monitor. <Ref. to READ DIAGNOSTIC TROUBLE CODE (DTC) .>	Is DTC U1650 a current malfunction?	Go to step 6 .	There was poor contact of connector. Repair the poor contact of connector. (Poor contact in combination connector (i10) terminal No. 20 or MFD connector (i122) terminal No. 9)
6 CHECK COMBINATION METER . Replace the combination meter. <Ref. to COMBINATION METER .> Read the DTC of the MFD using the Subaru Select Monitor. <Ref. to READ DIAGNOSTIC TROUBLE CODE (DTC) .>	Is DTC U1650 a current malfunction?	Replace the MFD. <Ref. to MULTI-FUNCTION DISPLAY (MFD) .>	There was something wrong with the combination meter.