Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Communication For Initializing Impossible
DIAGNOSIS:
Open or short circuit in data link connector
TROUBLE SYMPTOM:
Subaru Select Monitor communication failure
WIRING DIAGRAM:
Engine electrical system Ref. to Engine Electrical System .
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK POWER SUPPLY CIRCUIT. Connect DST-i or general scan tool to data link connector. |
Does DST-i or the general scan tool turn ON? | Go to step 4 . | Go to step 2 . |
| 2 CHECK POWER SUPPLY CIRCUIT. Measure the voltage between data link connector and chassis ground. Connector & terminal (B40) No. 16 (+) - Chassis ground (-): |
Is the voltage 10 V or more? | Go to step 3 . | Repair the power supply circuit.
NOTE:
In this case, repair the following item:
|
3 CHECK HARNESS BETWEEN DATA LINK CONNECTOR AND CHASSIS GROUND.
|
Is the resistance less than 5 Ω? | Repair the poor contact of data link connector. | Repair the harness and connector.
NOTE:
In this case, repair the following item:
|
| 4 CHECK HARNESS BETWEEN ECM AND DATA LINK CONNECTOR. Measure the resistance between data link connector and chassis ground. Connector & terminal (B40) No. 7 - Chassis ground: |
Is the resistance 1 MΩ or more? | Repair the poor contact of the ECM or data link connector. | Repair the short circuit to ground in harness between ECM connector and data link connector. |
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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