Terminals Of Ecu
- CHECK DISTANCE CONTROL ECU
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
ECU CONNECTOR TERMINALS REFERENCE CHARTSymbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition B - GND (A20-1 - A20-12) BR - R Battery Always 10 to 14 V CANH (A20 - 8) L CAN communication signal CAN communication circuit - CANL (A20 - 9) W CAN communication signal CAN communication circuit - SGND - Body ground (A20-10 - Body ground) R - Body ground Ground Always Below 1 V GND - Body ground (A20-12 - Body ground) R - Body ground Ground Always Below 1 V IGB - GND (A20-13 - A20-12) V - R Ignition switch ON signal Ignition switch OFF --> ON (IG) Below 1 V --> 10 to 14 V LRDD - GND (A20-22 - A20-12) B - R Laser sensor input signal Ignition switch ON (IG) Pulse generation (see Fig 2) LRRD - GND (A20-23 - A20-12) G - R Laser sensor output signal Ignition switch ON (IG) Pulse generation (see Fig 3) - Reference: waveform 1
HINT:
- Terminal: LRDD - GND
- Gauge set: 2 V/DIV, 10 msec./DIV
- Condition: Ignition switch ON
- Reference: waveform 2
HINT:
- Terminal: LRRD - GND
- Gauge set: 2 V/DIV, 5 msec./DIV
- Condition: Ignition switch ON
- Reference: waveform 1
- CHECK ECM ECM TERMINALS REFERENCE CHART
Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition STP - E1 (A24-15 - B47-1) W - BR Stop light signal Brake pedal released (Stop light switch OFF) --> Brake pedal depressed (Stop light switch ON) Below 1 V --> 10 to 14 V CCS - E1 (D41-2 - B47-1) B - BR Cruise control main switch signal Ignition switch ON (IG) CANCEL switch ON SET / COAST switch ON RES / ACC switch ON Main switch ON 10 to 16 V
6.6 to 10.1 V
4.5 to 7.1 V
2.3 to 4.0 V
Below 1 VST1- - E1 (A24-16 - B47-1) GR - BR Stop light signal Ignition switch ON (IG) Brake pedal depressed (Stop light switch ON) --> Brake pedal released (Stop light switch OFF) Below 1 V --> 10 to 14 V CCHG - E1 (D41-4 - B47-1) Y - BR Distance control switch signal Ignition switch ON (IG) Cruise control main switch ON MODE switch ON --> MODE switch OFF Below 1 V --> 10 to 14 V LGND - Body ground (A24-31 - Body ground) BR - Body ground Ground Always Below 1 V E1 - Body ground (B47-1 - Body ground) BR - Body ground Ground Always Below 1 V If the value is not within the standard range, some defects on the vehicle is suspected.
- CHECK LASER SENSOR
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
LASER SENSOR CONNECTOR REFERENCE CHARTSymbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition LGND - Body ground (A36-1 - Body ground) BR - Body ground Distance signal Always Below 1 Ω SGND - Body ground (A36-2 - Body ground) R - Body ground Ground Always Below 1 Ω LRDD - SGND (A36-3 - A36-2) B - R Laser radar sensor output signal Ignition switch: ON (IG) Pulse generation (see Fig 6) LRRD - SGND (L1-4 - L1-2) G - R Laser radar sensor input signal Ignition switch: ON (IG) Pulse generation (see Fig 7) IGB - SGND (L1-5 - L1-2) V - R Ignition switch signal Ignition switch: ON (IG) 10 to 14 V - Reference: waveform 1
HINT:
- Terminal: LRDD - SGND
- Gauge set: 1 V/DIV, 2 msec./DIV
- Condition: Ignition switch on (IG)
- Reference: waveform 2
HINT:
- Terminal: LRRD - SGND
- Gauge set: 1 V/DIV, 2 msec./DIV
- Condition: Ignition switch on (IG)
- Reference: waveform 1