Check Keyless Entry Control Module

Step	Check	Yes	No
1 CHECK BODY INTEGRATED UNIT . Read the DTC using Subaru Select Monitor. NOTE: For detailed procedures, refer to "PC application help for Subaru Select Monitor".	Is DTC B1500 "Keyless UART com. Malfunction" displayed?	Go to step 2 .	Keyless entry control module is normal.
2 CHECK POWER SUPPLY. Disconnect the keyless entry control module connector. Measure the voltage between keyless entry control module connector and chassis ground. Connector & terminal Model without tire pressure monitoring system (R80) No. 4 (+) - Chassis ground (-): Model with tire pressure monitoring system (R221) No. 6 (+) - Chassis ground (-):	Is the voltage 10 V or more?	Go to step 3 .	Check the harness for open or short circuits between the keyless entry control module and the fuse.
3 CHECK POWER SUPPLY (MODEL WITH TPMS ONLY). Measure the voltage between connector and chassis ground. Connector & terminal (R221) No. 4 (+) - Chassis ground (-):	IGN OFF: 0 V IGN ON: 10 V or more?	Go to step 4 .	Check the harness for open or short circuits between the keyless entry control module and the fuse.
4 CHECK GROUND CIRCUIT. Measure the resistance between keyless entry control module connector and chassis ground. Connector & terminal Model without tire pressure monitoring system (R80) No. 7 - Chassis ground: Model with tire pressure monitoring system (R221) No. 5 - Chassis ground:	Is the resistance less than 10 Ω?	Go to step 5 .	Repair or replace the harness.
5 CHECK KEYLESS ENTRY CONTROL MODULE CIRCUIT. Disconnect the body integrated unit connector. Check the harness between keyless entry control module and body integrated unit. Connector & terminal Model without tire pressure monitoring system (i171) No. 11 - (R80) No. 3: Model with tire pressure monitoring system (i171) No. 11 - (R221) No. 11:	Is harness normal?	Replace the keyless entry control module.	Repair or replace the harness.