Subaru Select Monitor: Inspection: Wiring Diagram

Tire Pressure Monitoring System < Refer to appropriate SYSTEM WIRING DIAGRAM. >

Fig 1: TPMS & Keyless Entry Control Module - Wiring Diagram

Courtesy of SUBARU OF AMERICA, INC.

Step	Check	Yes	No
1 CHECK IGNITION SWITCH.	Is the ignition switch ON?	Go to step 2 .	Turn the ignition switch to ON, and select TPM mode using Subaru Select Monitor.
2 CHECK BATTERY.	Is the voltage 11 V or more?	Go to step 3 .	Charge or replace the battery.
3 CHECK BATTERY TERMINAL.	Is there poor contact at battery terminal?	Repair or tighten the battery terminal.	Go to step 4 .
4 CHECK SUBARU SELECT MONITOR COMMUNICATION. Turn the ignition switch to ON. Using the Subaru Select Monitor, check whether communication to other systems can be executed normally.	Is the system name displayed on Subaru Select Monitor?	Go to step 8 .	Go to step 5 .
5 CHECK SUBARU SELECT MONITOR COMMUNICATION. Turn the ignition switch to OFF. Disconnect the connector of the TPMS & keyless entry CM or TPMS CM. Turn the ignition switch to ON. Check whether communication to other systems can be executed normally.	Is the system name displayed on Subaru Select Monitor?	Replace the TPMS & keyless entry CM or TPMS CM. < Refer to REMOVAL , Tire Pressure Monitoring System. >	Go to step 6 .
6 CHECK HARNESS CONNECTOR BETWEEN EACH CONTROL MODULE AND DATA LINK CONNECTOR. Turn the ignition switch to OFF. Disconnect the TPMS & keyless entry CM or TPMS CM. Measure the resistance between data link connector and chassis ground. Connector & terminal (B40) No. 7 - Chassis ground:	Is the resistance 1 MΩ or more?	Go to step 7 .	Repair the harness and connector between each control module and data link connector.
7 CHECK OUTPUT SIGNAL TO CONTROL MODULE. Turn the ignition switch to ON. Measure the voltage between TPMS & keyless entry CM or TPMS CM and chassis ground. Connector & terminal (B40) No. 7 (+) - Chassis ground (-):	Is the voltage less than 1 V?	Go to step 8 .	Repair the harness and connector between each control module and data link connector.
8 CHECK HARNESS CONNECTOR BETWEEN CONTROL MODULE AND DATA LINK CONNECTOR. Turn the ignition switch to OFF. Measure the resistance between TPMS & keyless entry CM or TPMS CM connector and data link connector. Connector & terminal (R221) No. 12 - (B40) No. 7:	Is the resistance less than 0.5 Ω?	Go to step 9 .	Repair the harness and connector between TPMS & keyless entry CM or TPMS CM and data link connector.
9 CHECK CONNECTOR.	Is the connector inserted into the TPMS & keyless entry CM or TPMS CM until it locks?	Go to step 10 .	Insert the connector into the TPMS & keyless entry CM or TPMS CM.
10 CHECK POWER SUPPLY CIRCUIT. Turn the ignition switch to ON. Measure the ignition power supply voltage between TPMS & keyless entry CM or TPMS CM connector and chassis ground. Connector & terminal (R221) No. 4 (+) - Chassis ground (-):	Is the voltage 10 - 15 V?	Go to step 11 .	Repair open circuit of the harness between TPMS & keyless entry CM or TPMS CM and battery.
11 CHECK HARNESS CONNECTOR BETWEEN CONTROL MODULE AND CHASSIS GROUND. Turn the ignition switch to OFF. Disconnect the connector from the TPMS & keyless entry CM or TPMS CM. Measure the resistance of harness between TPMS & keyless entry CM or TPMS CM and chassis ground. Connector & terminal (R221) No. 5 - Chassis ground:	Is the resistance less than 0.5 Ω?	Go to step 12 .	Repair open circuit of the harness of TPMS & keyless entry CM or TPMS CM.
12 CHECK POOR CONTACT OF CONNECTOR.	Is there poor contact of TPMS & keyless entry CM or TPMS CM power supply, ground circuit and data link connector?	Repair the connector.	Replace the TPMS & keyless entry CM or TPMS CM. < Refer to REMOVAL , Tire Pressure Monitoring System. >