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
DETECTING CONDITION:
Defective harness connector
TROUBLE SYMPTOM:
Communication is impossible between occupant detection control module and Subaru Select Monitor.
WIRING DIAGRAM:
| 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 the occupant detection system 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.
|
Are the system name and model year displayed on Subaru Select Monitor? | Go to step 8. | Go to step 5. |
| 5. CHECK OCCUPANT DETECTION CONTROL MODULE CONNECTOR. Turn the ignition switch to OFF. |
Is the occupant detection control module connectors and body harness connectors are connected securely? | Go to step 6. | Connect the occupant detection control module connector and body harness connector. |
6. CHECK SUBARU SELECT MONITOR COMMUNICATION.
|
Are the system name and model year displayed on Subaru Select Monitor? | Replace the seat cushion frame assembly. < Ref. to REMOVAL , Front Seat.< | Go to step 7. |
7. CHECK HARNESS CONNECTOR BETWEEN EACH CONTROL UNIT AND DATA LINK CONNECTOR.
|
Is the resistance more than 1 Mohm? | Go to step 8. | Check harness and connector between each control unit and data link connector. |
8. CHECK THE OUTPUT SIGNAL FOR OCCUPANT DETECTION CONTROL MODULE.
|
Is the voltage less than 1 V? | Go to step 9. | Repair and replace the harness connector between each control unit and data link connector. |
| 9. CHECK HARNESS CONNECTOR BETWEEN OCCUPANT DETECTION CONTROL MODULE AND DATA LINK CONNECTOR. Measure the resistance between occupant detection control module connector and data link connector. Connector & terminal (R212) No. 2 - (B40) No. 10: |
Is the resistance less than 0.5 ohm? | Go to step 10. | Repair and replace the harness connector between occupant detection control module and data link connector. |
10. CHECK POWER SUPPLY CIRCUIT.
|
Is the voltage 10 V or more? | Go to step 11. | Repair or replace the vehicle harness. |
11. CHECK HARNESS CONNECTOR BETWEEN OCCUPANT DETECTION CONTROL MODULE AND CHASSIS GROUND.
|
Is the resistance less than 10 ohm? | Go to step 12. | Repair or replace the body harness. |
| 12. CHECK POOR CONTACT IN CONNECTORS. | Is there poor contact in control module power supply, ground circuit and data link connector? | Replace the airbag harness. | Replace the seat cushion frame assembly. < Ref. to REMOVAL , Front Seat.< |
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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