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Terminals Of Ecu

DISTANCE CONTROL ECU

Fig 1: Identifying Distance Control ECU Terminals

G03007871

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DISTANCE CONTROL ECU TERMINALS VOLTAGE

Symbols (Terminals No.)	Wiring Color	Terminal Description	Condition	Specified Condition
B - GND (D2-1 - D2-12)	P - R	Battery	Always	10 to 14 V
WIP2 - GND (D2-2 - D2-12)	W - R	Wiper switch signal	Ignition switch ON Wiper switch OFF --< HI	Below 1 V --> 10 to 14 V
WASH - GND (D2-3 - D2-12)	V - R	Washer switch signal	Ignition switch ON Washer switch OFF --> ON	10 to 14 V --> Below 1 V
SGND - Body ground (D2-10 - Body ground)	R - Body ground	Ground	Always	Below 1 Ω
GND - Body ground (D2-12 - Body ground)	R - Body ground	Ground	Always	Below 1 Ω
IGB - GND (D2-13 - D2-12)	V - R	Ignition switch	Ignition switch ON	10 to 14 V
MODE - GND (D2-16 - D2-12)	LG - R	Distance control switch signal	Ignition switch ON Distance control switch OFF --> ON	10 to 14 V --> Below 1 V
LRDD - GND (D2-22 - D2-12)	B - R	Laser radar sensor input signal	Ignition switch ON	Pulse generation (*1)
LRRD - GND (D2-23 - D2-12)	W- R	Laser radar sensor output signal	Ignition switch ON	Pulse generation (*2)
ELC - GND (D2-24 - D2-12)	L-B - R	ECM input signal	Ignition switch ON	Pulse generation (*3)
LCS - GND (D2-25 - D2-12)	GR - R	ECM output signal	Ignition switch ON	Pulse generation (*4)

Reference: Oscilloscope wave form (*1)
HINT:
- Terminal: LRDD - GND
- Gauge set: 2 V/DIV, 10 ms/DIV
- Condition: Ignition switch ON
Fig 2: Oscilloscope Wave Form Graph (*1)
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Reference: Oscilloscope wave form (*2)
HINT:
- Terminal: LRRD - GND
- Gauge set: 2 V/DIV, 5 ms/DIV
- Condition: Ignition switch ON
Fig 3: Oscilloscope Wave Form Graph (*2)
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Reference: Oscilloscope wave form (*3)
HINT:
- Terminal: ELC - GND
- Gauge set: 2 V/DIV, 5 ms/DIV
- Condition: Ignition switch ON
Fig 4: Oscilloscope Wave Form Graph (*3)
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Reference: Oscilloscope wave form (*4)
HINT:
- Terminal: LCS - GND
- Gauge set: 2 V/DIV, 5 ms/DIV
- Condition: Ignition switch ON
Fig 5: Oscilloscope Wave Form Graph (*4)
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ECM

Fig 6: Identifying ECM Terminals
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Fig 7: ECM Terminals Voltage And Resistance Chart
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If the value is not within the standard range, some defects on the vehicle is suspected.
1. Reference: Oscilloscope wave form (*1)
  HINT:
  - Terminal: LCS - E1
  - Gauge set: 1 V/DIV, 20 ms/DIV
  - Condition: Ignition switch ON
  Fig 8: Oscilloscope Wave Form Graph (*1)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Reference: Oscilloscope wave form (*2)
  HINT:
  - Terminal: ELC - E1
  - Gauge set: 1 V/DIV, 20 ms/DIV
  - Condition: Ignition switch ON
  Fig 9: Oscilloscope Wave Form Graph (*2)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

LASER RADAR SENSOR

Fig 10: Identifying Laser Radar Sensor Connector Terminals

G03007880

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LASER RADAR SENSOR CONNECTOR TERMINALS VOLTAGE AND RESISTANCE

Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
LGND - Body ground (L1-1 - Body ground)	BR - Body ground	Distance signal	Always	Below 1 Ω
SGND - Body ground (L1-2 - Body ground)	R - Body ground	Ground	Always	Below 1 Ω
LRDD - SGND (L1-3 - L1-2)	B - R	Laser radar sensor output signal	Ignition switch ON	Pulse generation (*1)
LRRD - SGND (L1-4 - L1-2)	W - R	Laser radar sensor input signal	Ignition switch ON	Pulse generation (*2)
IGB - SGND (L1-5 - L1-2)	V - R	Ignition switch	Ignition switch ON	10 to 14 V

Reference: Oscilloscope wave form (*1)
HINT:
- Terminal: LRDD - SGND
- Gauge set: 1 V/DIV, 2 ms/DIV
- Condition: Ignition switch ON
Fig 11: Oscilloscope Wave Form Graph (*1)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Reference: Oscilloscope wave form (*2)
HINT:
- Terminal: LRRD - SGND
- Gauge set: 1 V/DIV, 2 ms/DIV
- Condition: Ignition switch ON
Fig 12: Oscilloscope Wave Form Graph (*2)
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BRAKE ACTUATOR ASSY (SKID CONTROL ECU)

Fig 13: Identifying Brake Actuator Assy (Skid Control ECU) Terminals
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Fig 14: Brake Actuator Assy (Skid Control ECU) Terminals Voltage Chart
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