Terminals Of Ecu

Fig 1: Identifying Television Camera Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the T17 camera connector.
2. Measure the voltage and resistance of each terminal of the wire harness side connector.

   Standard: 

   VOLTAGE AND RESISTANCE SPECIFICATION
   
   

   Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified value
   CGND (T17-3) - Body ground	BR - Body ground	Power ground	Always	Below 1 Ω
   CB+ (T17-4) - CGND (T17-3)	W - BR	Power source	Ignition switch ON, shift lever R position	5.5 to 7.05 V

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

3. Reconnect the T17 camera connector.
4. Measure the voltage and frequency of each terminal of the connector.

   Standard: 

   WIRING COLOR AND TERMINAL DESCRIPTION
   
   

   Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified value
   CV+ (T17-2) - CV- (T17-1)	B - W	Display signal	Ignition switch ON, shift lever R position	See  1waveform 1

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

5. Reference:

   Oscilloscope waveform

   1. Waveform 1

Fig 2: Waveform Graph

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 3: Identifying Television Camera ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the T24 ECU connector.
2. Measure the voltage and resistance between each terminal of the wire harness side connector.
   VOLTAGE AND RESISTANCE SPECIFICATION
   
   

   Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
   +B (T24-1) - GND1 (T24-8)	Y - W-B	Power source	Always	11 to 14 V
   IG (T24-3) - GND1 (T24-8)	R - W-B	IG signal input	Ignition switch ON	11 to 14 V
   ACC (T24-4) - GND1 (T24-8)	GR - W-B	Accessory (ON)	Ignition switch OFF	Below 1 V
   			Ignition switch ACC	11 to 14 V
   GND1 (T24-8) - 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.

3. Reconnect the T24 ECU connector.
4. Measure the voltage and waveform between each terminal of the connector.
   WIRING COLOR AND TERMINAL DESCRIPTION
   
   

   Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
   REV (T23-3) - Body ground	R-B - Body ground	Reverse signal	Ignition switch ON, shift lever R position	11 to 14 V
   TX1- (T23-8) - GND1 (T24-8)	LG - W-B	AVC-LAN communication signal	Ignition switch ACC	2 to 3 V
   TX1+ (T23-9) - GND1 (T24-8)	L - W-B	AVC-LAN communication signal	Ignition switch ACC	2 to 3 V
   CV- (T23-19) - GND1 (T24-8)	Shielded - W-B	Television camera ground (Shielded)	Always	Below 1 V
   CV+ (T23-20) - GND1 (T24-8)	R - W-B	Television camera display signal input	Ignition switch ON, shift lever R position	Pulse generation (see waveform 1)
   TX- (T23-28) - GND1 (T24-8)	LG - W-B	AVC-LAN communication signal	Ignition switch ACC	2 to 3 V
   TX+ (T23-29) - GND1 (T24-8)	L - W-B	AVC-LAN communication signal	Ignition switch ACC	2 to 3 V
   BCTY (T23-30) - Body ground	R-L - Body ground	Back door courtesy switch signal input	Back door opened	11 to 14 V
   CGND (T23-39) - GND1 (T24-8)	W - W-B	Television camera ground	Always	Below 1 V
   CB+ (T23-40) - GND1 (T24-8)	B - W-B	Power source to television camera	Ignition switch ON, shift lever R position	5.5 to 7.05 V

5. Using an oscilloscope, check the waveform.

Waveform 1 (reference)