Terminals Of Ecu [04/2020 - 09/2022]
WARNING: This page is about a different car, the 2022 Toyota Corolla, 2021 Toyota Corolla, and 2020 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK COMBINATION METER ASSEMBLY
- Disconnect the I4 and I5 combination meter assembly connectors.
- Measure the resistance and voltage according to the value(s) in the table below.
HINT:
Measure the values on the wire harness side with the connector disconnected.
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition I4-22 (B) - Body ground G - Body ground Auxiliary battery power supply Power switch off 11 to 14 V I4-38 (IG+) - Body ground LG - Body ground Ignition power supply Power switch off Below 1 V Power switch on (IG) 11 to 14 V I4-23 (ES) - Body ground W-B - Body ground Ground Always Below 1 Ω I5-36 (RLSB) - Body ground G - Body ground Rear LH seat belt buckle switch signal Rear LH seat belt fastened 10 kΩ or higher Rear LH seat belt unfastened Below 1 Ω I5-35 (RRSB) - Body ground R - Body ground Rear RH seat belt buckle switch signal Rear RH seat belt fastened 10 kΩ or higher Rear RH seat belt unfastened Below 1 Ω I5-19 (RCSB) - Body ground W - Body ground Rear center seat belt buckle switch signal Rear center seat belt fastened 10 kΩ or higher Rear center seat belt unfastened Below 1 Ω
- AIRBAG SENSOR ASSEMBLY
Terminal No. Terminal Symbol Destination O1-28 LBE+ Front seat inner belt assembly LH O1-27 LBE- Front seat inner belt assembly LH - CHECK OCCUPANT DETECTION ECU
- Measure the voltage and check for pulses according to the value(s) in the table below.
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition j4-10 (GND) - Body ground W-B - Body ground Ground Always Below 1 V j4-6 (IG2) - j4-10 (GND) B - W-B Power source Power switch on (IG) 11 to 14 V j4-9 (BGND) - j4-10 (GND) P - W-B Front passenger buckle switch ground Always Below 1 V j4-7 (BSW) - j4-9 (BGND) G - P Front passenger buckle switch signal Always Pulse generation j3-1 (SVC1) - j3-5 (SGD1) R - G Front occupant classification sensor LH power supply Power switch on (IG) 11 to 14 V j3-2 (SVC3) - j3-6 (SGD3) GR - W Rear occupant classification sensor LH power supply Power switch on (IG) 11 to 14 V j3-3 (SIG1) - j3-5 (SGD1) P - G Front occupant classification sensor LH signal Power switch on (IG) Pulse generation j3-4 (SIG3) - j3-6 (SGD3) SB - W Rear occupant classification sensor LH signal Power switch on (IG) Pulse generation j3-5 (SGD1) - j4-10 (GND) G - W-B Front occupant classification sensor LH ground Always Below 1 V j3-6 (SGD3) - j4-10 (GND) W - W-B Rear occupant classification sensor LH ground Always Below 1 V
- Measure the voltage and check for pulses according to the value(s) in the table below.