Terminals Of Ecu
- CHECK HYBRID VEHICLE CONTROL ECU
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Disconnect the A54 ECU connector.
- Measure the voltage and resistance of the wire harness side connector.TERMINAL REFERENCE CHART
Symbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition +B (A54-46) - Body ground B-R - Body ground +B power supply Power switch ON (IG) 10 to 14 V BATT (A54-20) - Body ground L - Body ground BATT power supply Always 10 to 14 V E1 (A54-18) - Body ground W-B - Body ground Body ground Always Below 1 Ω STP (A54-112) - Body ground R-B - Body ground Stop light signal Power switch ON (IG), depress brake pedal 10 to 14 V STP (A54-112) - Body ground R-B - Body ground Stop light signal Power switch ON (IG), release brake pedal Below 1 V ST1- (A54-70) - Body ground G-W - Body ground Stop light signal Power switch ON (IG), depress brake pedal Below 1 V ST1- (A54-70) - Body ground G-W - Body ground Stop light signal Power switch ON (IG), release brake pedal 10 to 14 V CCS (A54-26) - E (A54-18) L-B - W-B Cruise control main switch circuit Cruise control main switch ON Below 1 Ω CCS (A54-26) - E (A54-18) L-B - W-B Cruise control main switch circuit Cruise control main switch OFF 10 kΩ or higher CCS (A54-26) - E (A54-18) L-B - W-B Cruise control main switch circuit SET / COAST switch hold ON 620 to 640 Ω CCS (A54-26) - E (A54-18) L-B - W-B Cruise control main switch circuit RES / ACC switch hold ON 235 to 245 Ω CCS (A54-26) - E (A54-18) L-B - W-B Cruise control main switch circuit CANCEL switch hold ON 1,510 to 1,570 Ω If the result is not as specified, there may be a malfunction on the wire harness side.