Terminals Of Ecu

MAIN BODY ECU INSPECTION
1. Remove the front scuff plate. (LH)
  Refer to REMOVAL
2. Remove the front side trim. (LH)
  Refer to REMOVAL
3. Remove the driver-side lower panel.
  Refer to REMOVAL
4. Remove the auto leveling control module (with headlight auto leveling system).
  Refer to REMOVAL
5. Verify that the voltages of each of the terminals are as indicated in the terminal voltage table (reference).
  Refer to TERMINALS OF ECU
  - If the voltage is not as specified in the terminal voltage table (reference), inspect the parts under Inspection item(s) and related wiring harnesses.
    - If the system does not work normally even though the inspection items are normal, identify the malfunctioning location according to the directions in [DIAGNOSTIC SYSTEM] and [SYMPTOM TROUBLESHOOTING] then perform repairs.
      
      Fig 1: Main Body ECU Connector End Views (E41, E1 And A1)
      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Terminal Voltage Table (Reference)

Terminal	Signal	Connected to	Measurement condition		Voltage (V)	Inspection item(s)
E41-1	Power supply	HAZARD 15 A fuse	Under any condition		B+	HAZARD 15 A fuse
E41-7	Power supply	ROOM 25 A fuse INTERIOR15 A fuse	Under any condition		B+	ROOM 25 A fuse INTERIOR15 A fuse
E41-2	-	-	-		-	-
E41-8*1	Brake light control	Brake light relay	Main body ECU simulation item STOP_LMP_CTL is on		1.0 or less	Brake light relay
E41-8*1	Brake light control	Brake light relay	Main body ECU simulation item STOP_LMP_CTL is off		B+	Brake light relay
E41-3	Rear turn light (RH) control	Rear turn light (RH)	Ignition is switched ON (engine off or on)	Turn switch is in right turn position	1.0 or less ←→ B+	Rear turn light (RH)
E41-3	Rear turn light (RH) control	Rear turn light (RH)	Ignition is switched ON (engine off or on)	Turn switch is in position other than above	1.0 or less	Rear turn light (RH)
E41-9	-	-	-		-	-
E41-4	Rear turn light (LH) control	Rear turn light (LH)	Ignition is switched ON (engine off or on)	Turn switch is in left turn position	1.0 or less ←→ B+	Rear turn light (LH)
E41-4	Rear turn light (LH) control	Rear turn light (LH)	Ignition is switched ON (engine off or on)	Turn switch is in position other than above	1.0 or less	Rear turn light (LH)
E41-10	Interior light power supply	Personal light	Under any condition		B+	Personal light
E41-5	-	-	-		-	-
E41-11	-	-	-		-	-
E41-6	Ground	Body ground	Under any condition		1.0 or less	Body ground
E41-12	Ground	Body ground	Under any condition		1.0 or less	Body ground
E1-1	Lock input (front door lock-link switch [driver's side])	Front door lock (driver's side)	Driver's door is locked		1.0 or less	Front door lock (driver's side)
E1-1	Lock input (front door lock-link switch [driver's side])	Front door lock (driver's side)	Driver's door is unlocked		Approx. 10	Front door lock (driver's side)
E1-17	Unlock input (front door locklink switch [driver's side])	Front door lock (driver's side)	Driver's door is locked		Approx. 9.5	Front door lock (driver's side)
E1-17	Unlock input (front door locklink switch [driver's side])	Front door lock (driver's side)	Driver's door is unlocked		1.0 or less	Front door lock (driver's side)
E1-2	CAN_L	CAN system related module	Terminal used for communication therefore determination based on terminal voltage is not possible.
E1-18	CAN_H	CAN system related module	Terminal used for communication therefore determination based on terminal voltage is not possible.
E1-3	Rear door latch switch (LH) signal	Rear door lock (LH)	Rear door (LH) is open		1.0 or less	Rear door lock (LH)
E1-3	Rear door latch switch (LH) signal	Rear door lock (LH)	Rear door (LH) is closed		Approx. 9.5	Rear door lock (LH)
E1-19	Rear door latch switch (RH) signal	Rear door lock (RH)	Rear door (RH) is open		1.0 or less	Rear door lock (RH)
E1-19	Rear door latch switch (RH) signal	Rear door lock (RH)	Rear door (RH) is closed		Approx. 9.5	Rear door lock (RH)
E1-4	Front door latch switch (passenger's side) signal	Front door lock (passenger's side)	Front door (passenger's side) is open		1.0 or less	Front door lock (passenger's side)
E1-4	Front door latch switch (passenger's side) signal	Front door lock (passenger's side)	Front door (passenger's side) is actuator (passenger's side) closed		Approx. 9.0	Front door lock (passenger's side)
E1-20	Front door latch switch (driver's side) signal	Front door lock (driver's side)	Front door (driver's side) is open		1.0 or less	Front door lock (driver's side)
E1-20	Front door latch switch (driver's side) signal	Front door lock (driver's side)	Front door (driver's side) is closed		Approx. 9.5	Front door lock (driver's side)
E1-5	Serial communication	Power window master switch	Terminal used for communication therefore determination based on terminal voltage is not possible.
E1-21	Serial communication	Engine stop and start ECU	Terminal used for communication therefore determination based on terminal voltage is not possible.
E1-6*2	Door lock control switch signal	Door lock control switch (RH)	Door lock control switch is turned to unlock side (driver's side or passenger's side)		1.0 or less	Door lock control switch (RH)
			Door lock control switch is turned to lock door lock control switch (RH) side (driver's side or passenger's side)		Approx. 1.25
			Other		Approx 5.0
E1-22	Front door key cylinder switch signal	Front door lock (driver's side)	Door key cylinder is turned to unlock side		1.0 or less	Front door lock (driver's side)
			Door key cylinder is turned to lock actuator (driver's side) side		Approx. 1.25
			Other		Approx 5.0
E1-7*3	Lock input (front door lock-link switch (passenger's side), rear door lock-link switch)	Front door lock (passenger's side) Rear door lock (driver's side), (passenger's side)	Passenger's door or rear seat door is unlocked		1.0 or less	Front door lock (passenger's side) Rear door lock (driver's side), (passenger's side)
E1-7*3			Passenger's door and rear seat door are locked		B+
E1-23	-	-	-		-	-
E1-8	-	-	-		-	-
E1-24	-	-	-		-	-
E1-9	Fuel sensor signal	Fuel sender gauge assembly	Inspect fuel sender gauge assembly and related wiring harness because determination based on terminal voltage is not possible. Refer to INSPECTION
E1-25	Fuel sensor ground	Fuel sender gauge assembly	Under any condition		1.0 or less	Fuel sender gauge assembly
E1-10	Trunk lid unlatch switch signal (exterior)	Trunk lid opener switch (exterior)	Trunk is opened		1.0 or less	Trunk lid opener switch (exterior)
E1-10	Trunk lid unlatch switch signal (exterior)	Trunk lid opener switch (exterior)	Trunk is closed		Approx. 4.5	Trunk lid opener switch (exterior)
E1-26	-	-	-		-	-
E1-11	-	-	-		-	-
E1-27	-	-	-		-	-
E1-12	-	-	-		-	-
E1-28	-	-	-		-	-
E1-13	LIN communication	Power management control ECU	Terminal used for communication therefore determination based on terminal voltage is not possible.
E1-29*1	Brake switch signal	Engine stop and start ECU Stop light switch	Brake pedal is depressed		B+	Engine stop and start ECU Stop light switch
E1-29*1	Brake switch signal	Engine stop and start ECU Stop light switch	Brake pedal is not depressed		1.0 or less	Engine stop and start ECU Stop light switch
E1-14	-	-	-		-	-
E1-30*1	Brake light control	Brake light relay Brake light (LH), (RH) High mounted stop light assembly Condenser	Brake pedal is depressed		B+	Brake light relay Brake light (LH), (RH) High mounted stop light assembly Condenser
E1-30*1	Brake light control		Brake pedal is not depressed		1.0 or less
E1-31	-	-	-		-	-
E1-16	-	-	-		-	-
E1-32	-	-	-		-	-
A1-1	Front turn light (RH) control	Front turn light (RH)	Ignition is switched ON (engine off or on)	Turn switch is in right turn position	1.0 or less ←→ B+	Front turn light (RH)
A1-1	Front turn light (RH) control	Front turn light (RH)	Ignition is switched ON (engine off or on)	Turn switch is in position other than above	1.0 or less	Front turn light (RH)
A1-13	Front turn light (LH) control	Front turn light (LH)	Ignition is switched ON (engine off or on)	Turn switch is in left turn position	1.0 or less ←→ B+	Front turn light (LH)
A1-13	Front turn light (LH) control	Front turn light (LH)	Ignition is switched ON (engine off or on)	Turn switch is in position other than above	1.0 or less	Front turn light (LH)
A1-2	CAN_H	CAN system related module	Terminal used for communication therefore determination based on terminal voltage is not possible.
A1-14	CAN_L	CAN system related module	Terminal used for communication therefore determination based on terminal voltage is not possible.
A1-3	Front blower motor relay control	Blower relay HEATER 40 A fuse	Ignition is switched ON (engine off or on)	Front blower motor is operated using fan switch	1.0 or less	Blower relay HEATER 40 A fuse
A1-3	Front blower motor relay control	Blower relay HEATER 40 A fuse	Ignition is switched ON (engine off or on)	Front blower motor is turned off by pressing climate control unit OFF button	B+	Blower relay HEATER 40 A fuse
A1-15	Windshield wiper INT relay control	Wiper INT relay	Ignition is switched ON (engine off or on)	Windshield wiper switch is in position other than OFF	1.0 or less	Wiper INT relay
A1-15	Windshield wiper INT relay control	Wiper INT relay	Ignition is switched ON (engine off or on)	Windshield wiper switch is in OFF position	B+	Wiper INT relay
A1-4	Windshield wiper motor (HI) control	Wiper HI relay	Ignition is switched ON (engine off or on)	Windshield wiper switch is in HIGH position	1.0 or less	Wiper HI relay
A1-4	Windshield wiper motor (HI) control	Wiper HI relay	Ignition is switched ON (engine off or on)	Windshield wiper switch is in OFF position	B+	Wiper HI relay
A1-16	Horn relay control	Horn relay	Ignition is switched ON (engine off or on)	Horn switch is on	1.0 or less	Horn relay
A1-16	Horn relay control	Horn relay	Ignition is switched ON (engine off or on)	Horn switch is off	B+	Horn relay
A1-5*3	Front fog light relay control	Front fog light relay	Ignition is switched ON (engine off or on)	Front fog light switch is on	1.0 or less	Front fog light relay
A1-5*3	Front fog light relay control	Front fog light relay	Ignition is switched ON (engine off or on)	Front fog light switch is off	B+	Front fog light relay
A1-17	-	-	-		-	-
A1-6	Rear window defogger relay control	Rear window defogger relay	Ignition is switched ON (engine off or on)	Rear window defogger switch is on	1.0 or less	Rear window defogger relay
A1-6	Rear window defogger relay control	Rear window defogger relay	Ignition is switched ON (engine off or on)	Rear window defogger switch is off	B+	Rear window defogger relay
A1-18*4	Burglar horn relay control	Theft-deterrent relay	Ignition is switched ON (engine off or on)	Horn switch is on	B+	Theft-deterrent relay
A1-18*4	Burglar horn relay control	Theft-deterrent relay	Ignition is switched ON (engine off or on)	Horn switch is off	1.0 or less	Theft-deterrent relay
A1-7	Autostop switch signal	Windshield wiper motor	Ignition is switched ON (engine off or on)	Windshield wiper switch is on and windshield wiper is operating	1.0 or less	Windshield wiper motor
A1-7	Autostop switch signal	Windshield wiper motor	Ignition is switched ON (engine off or on)	Windshield wiper switch is off	B+	Windshield wiper motor
A1-19	Power supply	ENG+B 7.5 A fuse ROOM 25 A fuse	Under any condition		B+	ENG+B 7.5 A fuse ROOM 25 A fuse
A1-8	Ignition power supply	METER1 10 A fuse	Ignition is switched ON (engine off or on)		B+	METER1 10 A fuse
A1-8	Ignition power supply	METER1 10 A fuse	The ignition is switched off (LOCK)		1.0 or less	METER1 10 A fuse
A1-20	-	-	-		-	-
A1-9*5	Washer fluid level sensor signal	Washer fluid level sensor	Ignition is switched ON (engine off or on)	Washer fluid level sensor is less than MIN (washer fluid level sensor on)	1.0 or less	Washer fluid level sensor
A1-9*5	Washer fluid level sensor signal	Washer fluid level sensor	Ignition is switched ON (engine off or on)	Washer fluid level sensor is MIN or more (Washer fluid level sensor off)	B+	Washer fluid level sensor
A1-21	Brake fluid level sensor signal	Brake fluid level sensor	Ignition is switched ON (engine off or on)	Brake fluid level sensor is less than MIN (brake fluid level sensor on)	1.0 or less	Brake fluid level sensor
A1-21	Brake fluid level sensor signal	Brake fluid level sensor	Ignition is switched ON (engine off or on)	Brake fluid level sensor is MIN or more (brake fluid level sensor off)	B+	Brake fluid level sensor
A1-10	-	-	-		-	-
A1-22	Horn switch control	Horn switch	Ignition is switched ON (engine off or on)	Horn switch is on (long press)	1.0 or less	Horn switch
A1-22	Horn switch control	Horn switch	Ignition is switched ON (engine off or on)	Horn switch is off	B+	Horn switch
A1-11	Trunk unlatch switch signal (interior)	Trunk lid opener switch (interior)	Trunk lid opener switch (interior) is on (trunk lid opener switch (interior) is pressed)		1.0 or less	Trunk lid opener switch (interior)
A1-11	Trunk unlatch switch signal (interior)	Trunk lid opener switch (interior)	Trunk lid opener switch (interior) is off (trunk lid opener switch (interior) is not pressed)		B+	Trunk lid opener switch (interior)
A1-23	-	-	-		-	-
A1-12	Hood latch switch signal	Hood latch switch	Hood is open		Approx. 9.0	Hood latch switch
A1-12	Hood latch switch signal	Hood latch switch	Hood is closed		1.0 or less	Hood latch switch
A1-24	LIN communication	Auto-light sensor/rain sensor*6	Terminal used for communication therefore determination based on terminal voltage is not possible.

*1 : With Pre-collision

*2 : With door lock control switch

*3 : With front fog light

*4 : With security horn assembly

*5 : With washer fluid level sensor

*6 : With auto light system/auto wiper system