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.
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HOMESERVICE MANUALSTOYOTA2009COROLLA S, 1.8 U, STANDARDREPAIR AND DIAGNOSISRESTRAINTSAIR BAG, SRSSUPPLEMENTAL RESTRAINT SYSTEMOCCUPANT CLASSIFICATION SYSTEMTERMINALS OF ECU
2009 Toyota Corolla S, 1.8 U, Standard
Terminals Of Ecu
2009 Toyota Corolla S, 1.8 U, StandardSECTION Terminals Of Ecu
- OCCUPANT CLASSIFICATION ECUΒ
VOLTAGE SPECIFICATION
| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition | ||||
|---|---|---|---|---|---|---|---|---|
| R2-3 (GSP) - R2-5 (GND) | Y - W-B (1) | Seat position sensor (for front passenger side) ground line | Always | Below 1 Ξ© | ||||
| BE - W-B (2) | ||||||||
| R2-4 (SP) - R2-5 (GND) | B-W-B (1) | Seat position sensor (for front passenger side) ground line | Always | Low: 5.0 to 6.9 mA Hi: 12 to 17 mA |
||||
| V-W-B (2) | ||||||||
| R2-5 (GND) - Body ground | W-B - Body ground | Occupant classification ECU ground line | Always | Below 1 V | ||||
| R2-6 (PS) - R2-15 (GPS) | R - Y (1) | Pressure sensor signal line | Ignition switch ON | Below 1 V | ||||
| W-GR (2) | ||||||||
| R2-7 (VPS) - R2-5 (GND) | W-W-B (1) | Pressure sensor +B line | Ignition switch ON | 4.75 to 5.25 V | ||||
| LG - W-B (2) | ||||||||
| R2-8 (GBT) - R2-5 (GND) | Y - W-B | Belt tension sensor ground line | Always | Below 1 V | ||||
| R2-9 (IG) - R2-5 (GND) | B - W-B | Occupant classification ECU +B line | Ignition switch ON | 10 to 14 V | ||||
| R2-10 (DIA) - R2-5 (GND) | W - W-B | Diagnosis (DLC3) | Ignition switch ON | Pulse generation | ||||
| R2-11 (FSR+) - R2-12 (FSR-) | W - B | Center airbag sensor assembly communication line | Ignition switch ON | Pulse generation | ||||
| R2-12 (FSR-) - R2-5 (GND) | B - W-B | Center airbag sensor assembly communication line (-) | Always | Below 1 V | ||||
| R2-13 (BSW) - R2-14 (BGND) | G - W-B (1) | Passenger side buckle switch line | Ignition switch ON | Low: 4 to 7 mA Hi: 12 to 18 mA |
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| G - P (2) | ||||||||
| R2-14 (BGND) - R2-5 (GND) | W-B - W-B (1) | Passenger side buckle switch ground line | Always | Below 1 V | ||||
| P - W-B (2) | ||||||||
| R2-15 (GPS) - R2-5 (GND) | Y - W-B (1) | Pressure sensor ground line | Always | Below 1 V | ||||
| GR - W-B (2) | ||||||||
| R2-16 (BT) - R2-5 (GND) | R - W-B | Belt tension sensor signal line | Ignition switch ON | 0 to 5 V | ||||
| R2-17 (VBT) - R2-5 (GND) | G - W-B | Belt tension sensor +B line | Ignition switch ON | 4.75 to 5.25 V | ||||
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RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.