DYNAMIC RADAR CRUISE CONTROL SYSTEM TERMINALS OF ECU

CHECK ECM (for 3UR-FE)

Tech Tips

The standard normal voltage between each pair of ECM terminals is shown in the table below. The appropriate conditions for checking each pair of terminals are also indicated. The result of checks should be compared with the standard normal voltage for that pair of terminals, displayed in the Specified Condition column. The illustration above can be used as a reference to identify the ECM terminal locations.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
C45-81 (E1) - Body ground	W-B - Body ground	ECM ground	Always	Below 1 Ω
C45-49 (D) - Body ground	P - Body ground	D shift position signal	Ignition switch ON Shift lever in D	11 to 14 V
			Ignition switch ON Shift lever not in D	Below 1 V
A38-39 (SFTU) - Body ground	V - Body ground	Up-shift switch signal	Ignition switch ON Shift lever in S	11 to 14 V
			Ignition switch ON Shift lever in +	Below 1 V
A38-27 (S) - Body ground	W - Body ground	S shift position switch signal	Ignition switch ON Shift lever in S	11 to 14 V
			Ignition switch ON Shift lever not in S	Below 1 V
A38-47 (SFTD) - Body ground	L - Body ground	Down-shift switch signal	Ignition switch ON Shift lever in S	11 to 14 V
			Ignition switch ON Shift lever in -	Below 1 V
A38-7 (STP) - Body ground	R - Body ground	Stop light signal	Brake pedal depressed	7.5 to 14 V
			Brake pedal released	0 to 1.5 V
A38-8 (ST1-) - Body ground	P - Body ground	Stop light signal (opposite to STP terminal)	Ignition switch ON Brake pedal depressed	0 to 1.5 V
			Ignition switch ON Brake pedal released	7.5 to 14 V
A38-60 (CCS) - A38-59 (ECCS)	L - BR	Cruise control main switch signal	Ignition switch ON Main switch off	1 MΩ or higher
			Ignition switch ON CANCEL switch held on	1510 to 1570 Ω
			Ignition switch ON -SET switch held on	620 to 640 Ω
			Ignition switch ON +RES switch held on	235 to 245 Ω
			Ignition switch ON Main switch on	Below 2.5 Ω

CHECK ECM (for 1UR-FE)

Tech Tips

The standard normal voltage between each pair of ECM terminals is shown in the table below. The appropriate conditions for checking each pair of terminals are also indicated. The result of checks should be compared with the standard normal voltage for that pair of terminals, displayed in the Specified Condition column. The illustration above can be used as a reference to identify the ECM terminal locations.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
C45*1-81 (E1) - Body ground C46*2-81 (E1) - Body ground	BR - Body ground	ECM ground	Always	Below 1 Ω
C45*1-27 (D) - Body ground C46*2-27 (D) - Body ground	Y - Body ground	D shift position signal	Ignition switch ON Shift lever in D	11 to 14 V
			Ignition switch ON Shift lever not in D	Below 1 V
A38*1-38 (SFTU) - Body ground A52*2-38 (SFTU) - Body ground	V - Body ground	Up-shift switch signal	Ignition switch ON Shift lever in S	11 to 14 V
			Ignition switch ON Shift lever in "+"	Below 1 V
A38*1-25 (S) - Body ground A52*2-25 (S) - Body ground	W - Body ground	S shift position switch signal	Ignition switch ON Shift lever in S	11 to 14 V
			Ignition switch ON Shift lever not in S	Below 1 V
A38*1-27 (SFTD) - Body ground A52*2-27 (SFTD) - Body ground	L - Body ground	Down-shift switch signal	Ignition switch ON Shift lever in S	11 to 14 V
			Ignition switch ON Shift lever in "-"	Below 1 V
A38*1-36 (STP) - Body ground A52*2-36 (STP) - Body ground	R - Body ground	Stop light signal	Brake pedal depressed	7.5 to 14 V
			Brake pedal released	0 to 1.5 V
A38*1-35 (ST1-) - Body ground A52*2-35 (ST1-) - Body ground	P - Body ground	Stop light signal (opposite to STP terminal)	Ignition switch ON Brake pedal depressed	0 to 1.5 V
			Ignition switch ON Brake pedal released	7.5 to 14 V
A38*1-45 (CCS) - Body ground A52*2-45 (CCS) - Body ground	L - Body ground	Cruise control main switch signal	Ignition switch ON Main switch off	1 MΩ or higher
			Ignition switch ON CANCEL switch held on	1510 to 1570 Ω
			Ignition switch ON -SET switch held on	620 to 640 Ω
			Ignition switch ON +RES switch held on	235 to 245 Ω
			Ignition switch ON Main switch on	Below 2.5 Ω

• *1: for LHD

• *2: for RHD

CHECK ECM (for 1VD-FTV)

Tech Tips

The standard normal voltage between each pair of ECM terminals is shown in the table below. The appropriate conditions for checking each pair of terminals are also indicated. The result of the checks should be compared with the standard normal voltage for that pair of terminals, which is displayed in the Specified Condition column. The illustration above can be used as a reference to identify the ECM terminal locations.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
C45*1-81 (E1) - Body ground C46*2-81 (E1) - Body ground	BR - Body ground	ECM ground	Always	Below 1 Ω
C45*1-28 (D) - Body ground C46*2-28 (D) - Body ground	P - Body ground	D shift position signal	Ignition switch ON Shift lever in D	11 to 14 V
			Ignition switch ON Shift lever not in D	Below 1 V
A38*1-38 (SFTU) - Body ground A52*2-38 (SFTU) - Body ground	V - Body ground	Up-shift switch signal	Ignition switch ON Shift lever in S	11 to 14 V
			Ignition switch ON Shift lever in "+"	Below 1 V
A38*1-25 (S) - Body ground A52*2-25 (S) - Body ground	W - Body ground	S shift position switch signal	Ignition switch ON Shift lever in S	11 to 14 V
			Ignition switch ON Shift lever not in S	Below 1 V
A38*1-37 (SFTD) - Body ground A52*2-37 (SFTD) - Body ground	L - Body ground	Down-shift switch signal	Ignition switch ON Shift lever in S	11 to 14 V
			Ignition switch ON Shift lever in "-"	Below 1 V
A38*1-13 (STP) - Body ground A52*2-13 (STP) - Body ground	R - Body ground	Stop light signal	Brake pedal depressed	7.5 to 14 V
			Brake pedal released	0 to 1.5 V
A38*1-35 (ST1-) - Body ground A52*2-35 (ST1-) - Body ground	P - Body ground	Stop light signal (opposite to STP terminal)	Ignition switch ON Brake pedal depressed	0 to 1.5 V
			Ignition switch ON Brake pedal released	7.5 to 14 V
A38*1-40 (CCS) - Body ground A52*2-40 (CCS) - Body ground	L - Body ground	Cruise control main switch signal	Ignition switch ON Main switch off	1 MΩ or higher
			Ignition switch ON CANCEL switch held on	1510 to 1570 Ω
			Ignition switch ON -SET switch hed on	620 to 640 Ω
			Ignition switch ON +RES switch held on	235 to 245 Ω
			Ignition switch ON Main switch on	Below 2.5 Ω

• *1: for LHD

• *2: for RHD

CHECK DRIVING SUPPORT ECU ASSEMBLY

1. 

   *a	1 V/DIV.
   *b	10 μsec./DIV.

   WAVEFORM 1

   
   

   1. CAN communication signal

      Item	Content
      Terminal Name	Between E164-8 (CA1P) and E164-28 (GND) Between E164-10 (CA2H) and E164-28 (GND)
      Tester Range	1 V/DIV., 10 μsec./DIV.
      Condition	Engine switch on (IG)

      Tech Tips

      The waveform varies depending on the CAN communication signal.

2. 

   *a	1 V/DIV.
   *b	10 μsec./DIV.

   WAVEFORM 2

   
   

   1. CAN communication signal

      Item	Content
      Terminal Name	Between E164-9 (CA1N) and E164-28 (GND) Between E164-11 (CA2L) and E164-28 (GND)
      Tester Range	1 V/DIV., 10 μsec./DIV.
      Condition	Engine switch on (IG)

      Tech Tips

      The waveform varies depending on the CAN communication signal.

CHECK MILLIMETER WAVE RADAR SENSOR

1. 

   *a	1 V/DIV.
   *b	10 μsec./DIV.

   WAVEFORM 1

   
   

   1. CAN communication signal

      Item	Content
      Terminal Name	Between A72-3 (CA2H) and A72-1 (SGND) Between A72-5 (CA1P) and A72-1 (SGND)
      Tester Range	1 V/DIV., 10 μsec./DIV.
      Condition	Engine switch on (IG)

      Tech Tips

      The waveform varies depending on the CAN communication signal.

2. 

   *a	1 V/DIV.
   *b	10 μsec./DIV.

   WAVEFORM 2

   
   

   1. CAN communication signal

      Item	Content
      Terminal Name	Between A72-2 (CA2L) and A72-1 (SGND) Between A72-6 (CA1N) and A72-1 (SGND)
      Tester Range	1 V/DIV., 10 μsec./DIV.
      Condition	Engine switch on (IG)

      Tech Tips

      The waveform varies depending on the CAN communication signal.