VEHICLE PROXIMITY NOTIFICATION SYSTEM TERMINALS OF ECU

CHECK VEHICLE APPROACHING SPEAKER CONTROLLER

1. Disconnect the I71 vehicle approaching speaker controller connector.

2. Measure the voltage and resistance according to the value(s) in the table below.

   Terminal No.	Wiring Color	Terminal Description	Condition	Specified Condition
   I71-1 (IG) - Body ground	B - Body ground	IG power supply	Power switch on (IG)	11 to 14 V
   			Power switch off	Below 1 V
   I71-7 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

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

3. Reconnect the I71 vehicle approaching speaker controller connectors.

4. Measure the voltage and check for pulses according to the value(s) in the table below.

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   I71-2 (STP) - I71-7 (GND)	L - W-B	Stop light signal input	Brake pedal depressed	8 V or higher
   			Brake pedal released	Below 1 V
   I71-3 (SP+) - I71-8 (SP-)	LG - P	Vehicle approaching speaker output	Vehicle approaching speaker operating	A waveform synchronized with the sound is output.
   I71-6 (SPD) - I71-7 (GND)	V - W-B	Speed signal input	Wheel being rotated	Pulse generation (See Waveform 1)
   I71-11 (SFTP) - I71-7 (GND)	R - W-B	P position signal input	Power switch on (IG), park (P) selected	Below 2 V
   			Power switch on (IG), park (P) not selected	8 V or higher
   I71-12 (OPSW) - I71-7 (GND)	B - W-B	Engine oil pressure switch signal input	Power switch on (READY), engine not operating	Below 2 V
   			Power switch on (READY), engine operating	8 V or higher

   If the result is not as specified, there is a problem in the vehicle approaching speaker controller or wire harness.

   1. Waveform 1 (Reference):

      

      Item	Condition
      Tool setting	5 V/DIV., 20 ms./DIV.
      Vehicle condition	Wheel being rotated

      Tech Tips

      If the vehicle speed increases, width (A) becomes narrower.