Terminals Of Ecu

Fig 1: Identifying Parking Assist ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the L90 ECU connector.
2. Measure the resistance and voltage according to the value (s) in the table below.
   RESISTANCE AND VOLTAGE SPECIFIED CONDITION
   
   

   Terminal No. (Symbols)	Wiring Color	Terminal Description	Condition	Specified Condition
   L90-1 (IG) - L90-4 (GND1)	V - W-B	Ignition signal input	Engine switch on (IG)	11 to 14 V
   L90-4 (GND1) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
   L90-6 (+B) - L90-4 (GND1)	R - W-B	Power source	Always	11 to 14 V
   L90-14 (ACC) - L90-4 (GND1)	LG - W-B	Accessory	Engine switch off	Below 1 V
   			Engine switch on (ACC)	11 to 14 V

3. Reconnect the L90 ECU connector.
4. Measure the resistance, voltage and waveform according to the value (s) in the table below.
   RESISTANCE, VOLTAGE AND WAVEFORM SPECIFIED CONDITION
   
   

   Terminal No. (Symbols)	Wiring Color	Terminal Description	Condition	Specified Condition
   L90-8 (CSB3) - L90-27 (CSG3)	R - V	Front side sensor signal	Engine switch off	Below 1 V
   			Engine switch on (IG), clearance sonar main switch OFF → ON	7.2 to 8.8 V
   L90-11 (AUO+) - Body ground	R - Body ground	Audio signal (output)	-	100 kΩ or higher
   L90-12 (TX1-) - L90-4 (GND1)	B - W-B	AVC-LAN communication signal	Engine switch on (ACC)	2 to 3 V
   L90-13 (TX1+) - L90-4 (GND1)	Y - W-B	AVC-LAN communication signal	Engine switch on (ACC)	2 to 3 V
   L90-27 (CSG3) - L90-4 (GND1)	V - W-B	Ground	Always	Below 1 Ω
   L90-28 (LIN3) - L90-27 (CSG3)	G-V	Front side sensor signal	Engine switch on (IG), clearance sonar main switch OFF → ON	Waveform
   L90-29 (AUGO)	Shielded	Audio small signal ground (shielded)	-	-
   L90-30 (AUO-) - Body ground	G - Body ground	Audio signal (output)	-	100 kΩ or higher
   L90-31 (TX+) - L90-4 (GND1)	Y - W-B	AVC-LAN communication signal	Engine switch on (ACC)	2 to 3 V
   L90-32 (TX-) - L90-4 (GND1)	B - W-B	AVC-LAN communication signal	Engine switch on (ACC)	2 to 3 V
   L91-10 (CV+) - L91-34 (CV-)	W - Shielded	Television camera display signal input	Engine switch on (IG), shift lever R position	Pulse generation (see  e waveform)
   L91-11 (CGND) - L90-4 (GND1)	R - W-B	Television camera ground	Always	Below 1 V
   L91-34 (CV-) - L90-4 (GND1)	Shielded - W-B	Television camera ground (shielded)	Always	Below 1 V
   L91-35 (CB+) - L90-4 (GND1)	B - W-B	Power source to television camera	Engine switch on (IG), shift lever R position	5.8 to 6.5 V

5. Using an oscilloscope, check the waveform.

   Waveform (Reference) 

   WAVEFORM REFERENCE CHART
   
   

   Item	Content
   Terminal No. (Symbols)	L91-34 (CV-) - L91-10 (CV+)
   Tool Setting	0.2V/DIV., 0.2 μsec./DIV.
   Condition	Engine switch on (IG), shift lever R position

Fig 2: Identifying Oscilloscope Waveform

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: 

Pulses as shown in the illustration. 

Fig 3: Identifying S35 Television Camera Assembly Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Measure the voltage and resistance according to the value (s) in the table below.
   VOLTAGE AND RESISTANCE SPECIFIED CONDITION
   
   

   Terminal No. (Symbols)	Wiring Color	Terminal Description	Condition	Specified Condition
   S35-2 (CV+) - S35-1 (CV-)	W - Shielded	Display signal	Engine switch on (IG), shift lever R position	Pulse generation (see  e waveform)

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

2. Disconnect the S35 camera connector.
3. Measure the voltage and waveform according to the value (s) in the table below.
   VOLTAGE AND WAVEFORM REFERENCE CHART
   
   

   Terminal No. (Symbols)	Wiring Color	Terminal Description	Condition	Specified Condition
   S35-3 (CGND) - Body ground	R - Body ground	Ground	Always	Below 1 Ω
   S35-4 (CB+) - S35-3 (CGND)	B-R	Power source	Engine switch on (IG), shift lever R position	5.8 to 6.5 V

   If the result is not as specified, there may be a malfunction on the wire harness side.

4. Reconnect the S35 camera connector.
5. Using an oscilloscope, check the waveform.

   Waveform (Reference) 

   WAVEFORM REFERENCE CHART
   
   

   Item	Content
   Terminal No. (Symbols)	S35-2 (CV+) - S35-1 (CV-)
   Tool Setting	0.2 V/DIV., 0.2 μsec/DIV.
   Condition	Engine switch on (IG), shift lever R position

   Fig 4: Identifying Oscilloscope Waveform

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: 

   Pulses as shown in the illustration.