Terminals Of Ecu

CHECK HYBRID VEHICLE CONTROL ECU

Fig 1: Identifying Hybrid Vehicle Control ECU Connector Terminal E55, A75, A74 And A76

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 CHART

Terminal 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.