VEHICLE PROXIMITY NOTIFICATION SYSTEM TERMINALS OF ECU

CHECK VEHICLE APPROACHING SPEAKER CONTROLLER

1. Disconnect the K145 vehicle approaching speaker controller connector.

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

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   K145-1 (IG) - Body ground	R - Body ground	IG power supply	Power switch on (IG)	11 to 14 V
   			Power switch off	Below 1 V
   K145-7 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

3. Connect the K145 vehicle approaching speaker controller connector.

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
   K145-2 (STP) - K145-7 (GND)	B - W-B	Stop light signal input	Power switch off, brake pedal depressed	8 V or higher
   			Power switch off, brake pedal released	Below 1 V
   K145-3 (SP+) - K145-8 (SP-)	P - V	Vehicle approaching speaker output	Vehicle approaching speaker operating	A waveform synchronized with the sound is output (See Waveform 1)
   K145-5 (SW) - K145-7 (GND)	L - W-B	Vehicle approaching speaker switch signal input	Power switch on (IG), vehicle approaching speaker switch not pressed	Below 1 V
   			Power switch on (IG), vehicle approaching speaker switch pressed	6 V or higher
   K145-6 (SPD) - K145-7 (GND)	L - W-B	Speed signal input	Power switch on (IG), wheel being rotated	Pulse generation (See Waveform 2)
   K145-9 (PRST) - K145-7 (GND)	W - W-B	SIL communication signal	Power switch on (IG), during transmission	Pulse generation (See Waveform 3)
   K145-10 (IND) - K145-7 (GND)	SB - W-B	Vehicle proximity notification off indicator light signal	Power switch on (IG), vehicle proximity notification off indicator light on	Below 1.8 V
   			Power switch on (IG), vehicle proximity notification off indicator light off	11 to 14 V
   K145-11 (KOK) - K145-7 (GND)	P - W-B	Permission signal	Power switch on (READY), shift lever in P	Below 2.3 V
   			Power switch on (READY), engine stopped and shift lever not in P	8 V or higher

   
   
   1. 

      Waveform 1

      Item	Condition
      Tester Connection	K145-3 (SP+) - K145-8 (SP-)
      Tool setting	1 V/DIV., 200 ms./DIV.
      Condition	Vehicle approaching speaker operating

   2. 

      Waveform 2

      Item	Condition
      Tester Connection	K145-6 (SPD) - K145-7 (GND)
      Tool setting	5 V/DIV., 20 ms./DIV.
      Condition	Power switch on (IG), wheel being rotated

      Tip:

      When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows.

   3. 

      Waveform 3

      Item	Condition
      Tester Connection	K145-9 (PRST) - K145-7 (GND)
      Tool setting	5 V/DIV., 10 ms./DIV.
      Condition	Power switch on (IG), during transmission