Terminals Of Ecu
WARNING: This page is about a different car, the 2008 Lexus LS 600hL. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK HYBRID VEHICLE CONTROL ECU
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Disconnect the A74, A75, A76 and E55 ECU connectors.
- Measure the voltage and resistance according to the value (s) in the table below.
CONNECTOR TERMINAL REFERENCE CHARTTerminal No (Symbols) Wiring Color Terminal Description Condition Specified Condition A74-1 (BATT) - Body ground B-W - Body ground Power Source Circuit Always 11 to 14 V A75-1 (STP) - Body ground L - Body ground Stop light switch signal Brake pedal is depressed 11 to 14 V A75-1 (STP) - Body ground L - Body ground Stop light switch signal Brake pedal is released Below 1 V A76-6 (ST1-) - Body ground V - Body ground Stop light switch signal Power switch ON (IG), brake pedal is released 11 to 14 V A76-6 (ST1-) - Body ground V - Body ground Stop light switch signal Power switch ON (IG), brake pedal is depressed Below 1 V A74-35 (CCS) - Body ground V - Body ground Cruise control switch signal Cruise control switch ON Below 2 5 Ω A74-35 (CCS) - Body ground V - Body ground Cruise control switch signal Cruise control switch OFF 1 MΩ or higher A74-35 (CCS) - Body ground V - Body ground Cruise control switch signal +/RES switch hold ON 235 to 245 Ω A74-35 (CCS) - Body ground V - Body ground Cruise control switch signal -/SET switch hold ON 617 to 643 Ω A74-35 (CCS) - Body ground V - Body ground Cruise control switch signal CANCEL switch hold ON 1509 to 1571 Ω A74-6 (EC) - Body ground W-B - Body ground Ground Always Below 1 Ω A75-7 (E1) - Body ground W-B - Body ground Ground Always Below 1 Ω A75-6 (E12) - Body ground W-B - Body ground Ground Always Below 1 Ω E55-7 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω E55-6 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω If the result is not as specified, there may be a malfunction on the wire harness side.