Terminals Of Ecu

CHECK HYBRID VEHICLE CONTROL ECU

Fig 1: Identifying ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the voltage of the connectors.

SPECIFIED CONDITION CHART

Symbols (Terminals No.)	Wiring Color	Terminal Description	Condition	Specified Condition
ST1 (H15-2) - GND1 (H14-1)	G - W-B	Stop light signal	Power switch is ON (IG), Brake pedal depressed	Below 0.5 V
ST1 (H15-2) - GND1 (H14-1)	G - W-B		Power switch is ON (IG), Brake pedal released	9 to 14 V
STP (H15-3) - GND1 (H14-1)	L - W-B		Power switch is ON (IG), Brake pedal depressed	9 to 14 V
STP (H15-3) - GND1 (H14-1)	L - W-B		Power switch is ON (IG), Brake pedal released	2 to 3 V
CCS (H14-13) - GND1 (H14-1)	V - W-B	Cruise control main switch circuit	Power switch is ON (IG)	10 to 14 V
			Power switch is ON (IG), CANCEL switch is held on	6.6 to 10.1 V
			Power switch is ON (IG), -/SET switch is held on	4.5 to 7.1 V
			Power switch is ON (IG), +/RES switch is held on	2.3 to 4.0 V
			Power switch is ON (IG), ON-OFF button is pushed on	Below 1 V
SPDI (H14-19) - GND1 (H14-1)		Vehicle speed input signal	Power switch is ON (IG), slowly turn wheel	Below 1 V to above 5 V

If the result is not as specified, the ECU may have a malfunction.