Terminals Of Ecu
- CHECK DISTANCE CONTROL ECU TERMINAL DESCRIPTION AND SPECIFIED CONDITION TABLE
Symbols (Terminal 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 on signal 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 (see waveform 1 ) LRRD - GND (D2-23 -D2-12) W - R Laser radar sensor input signal Ignition switch ON Pulse generation (see waveform 2) ELC - GND (D2-24 -D2-12) L-B - R ECM input signal Ignition switch ON Pulse generation (see waveform 3) LCS - GND (D2-25 -D2-12) GR - R ECM input signal Ignition switch ON Pulse generation (see waveform 4) - Reference: waveform 1
HINT:
- Terminal: LRDD - GND
- Gauge set: 2 V/DIV, 10 ms./DIV
- Condition: Ignition switch ON
- Reference: waveform 2
HINT:
- Terminal: LRRD - GND
- Gauge set: 2 V/DIV, 5 ms./DIV
- Condition: Ignition switch ON
- Reference: waveform 3
HINT:
- Terminal: ELC - GND
- Gauge set: 2 V/DIV, 5 ms./DIV
- Condition: Ignition switch ON
- Reference: waveform 4
HINT:
- Terminal: LCS - GND
- Gauge set: 2 V/DIV, 5 ms./DIV
- Condition: Ignition switch ON
- Reference: waveform 1
- CHECK ECM ECM TERMINAL DESCRIPTION AND SPECIFIED CONDITION TABLE
Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition E1 - Body ground (E7-1 - Body ground) BR - Body ground Ground Always Below 1 Ω LGND - Body ground (H31-5 - Body ground) Y - Body ground Ground Always Below 1 Ω LCS - E1 (E7-19 - E7-1) W-R - BR Distance control ECU input signal Ignition switch ON Pulse generation (see waveform 1) CCHG - E1 (E7-28 - E7-1) P - BR Distance control switch signal Ignition switch ON
Cruise control main switch ON
MODE switch ONBelow 1 V Ignition switch ON
Cruise control main switch ON
MODE switch ON10 to 14 V ELC - E1 (E6-12 - E7-1) B-R - BR Distance control ECU output signal Ignition switch ON Pulse generation (see waveform 1) ST1- - E1 (E6-12 - E7-1) GR - BR Stop light signal Brake pedal depressed (Stop light switch ON) Below 1 V Brake pedal depressed (Stop light switch OFF) 10 to 14 V SPD - E1 (E6-17 - E7-1) LG - BR Speed signal Engine start --> Car stoppage Below 1.5 V --> 4.7 to 16 V During pedal released (Pulse generated) 3 to7 V STP - E1 (E6-19 - E7-1) B - BR Stop light signal Brake pedal released (Stop light switch OFF) Below 1 V Brake pedal depressed (Stop light switch ON) 10 to 14 V CCS - E1 (E6-24 - E7-1) P - BR Cruise control main switch signal Ignition switch ON CANCEL switch ON -/SET switch ON +/RES 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 VENG+ - ENG- (E5-24 - E5-30) LG - L Skid control signal Ignition switch ON Pulse generation (see waveform 1) TRC+ - TRC- (E5-25 - E5-31) Y - G Skid control signal Ignition switch ON Pulse generation (see waveform 1) If the value is not within the standard range, some defects on the vehicle is suspected.
- Reference: waveform 1
HINT:
- Terminal: LCS - E1
- Gauge set: 1V/DIV, 20 ms./DIV
- Condition: Ignition switch ON
- Reference: waveform 1
- CHECK LASER SENSOR LASER SENSOR TERMINALS DESCRIPTION AND SPECIFIED CONDITION TABLE
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 (see waveform 1) LRRD - SGND (L1-4 - L1-2) W - R Laser radar sensor input signal Ignition switch ON Pulse generation (see waveform 2) IGB - SGND (L1-5 - L1-2) V - R Ignition switch signal Ignition switch ON 10 to 14 V - Reference: waveform 1
HINT:
- Terminal: LRDD - SGND
- Gauge set: 1 V/DIV, 2 msec./DIV
- Condition: Ignition switch ON
- Reference: waveform 2
HINT:
- Terminal: LRRD - SGND
- Gauge set: 1 V/DIV, 2 msec./DIV
- Condition: Ignition switch ON
- Reference: waveform 1
- BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TERMINAL DESCRIPTION AND SPECIFIED CONDITION TABLESymbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition BZ (S1 - 30) - GND (S1 - 32) O - W-B Skid control buzzer signal Ignition switch ON Skid control buzzer is not sounded 10 to 14 V ((1)) ENG+ (S1 - 9) - ENG- (S1 - 23) G - L-B ECM signal Ignition switch ON Pulse generation ((1)) TRC+ (S1 - 8) TRC- (S1 - 22) BR - P ECM signal Ignition switch ON Pulse generation ((2)) STPO (S1 - 16) - GND1 (S1 - 32) G - W-B Stop light signal Ignition switch ON 10 to 14 V ((1)) STP2 (S1 - 21) - GND1 (S1 - 32) GR - W-B Stop light signal Brake pedal released (Stop light switch OFF) Below 1.0 V ((1)) Brake pedal depressed (Stop light switch OFF) 10 to 14 V ((1) STP1 (S1 - 27) - GND1 (S1 - 32) W - W-B Stop light signal Brake pedal released (Stop light switch OFF) ((1)) Brake pedal depressed (Stop light switch OFF) ((1)) (1) Since the waterproof connector is used, disconnect the connector from the ECU and check the wire harness. (2) Since the waterproof connector is used, check the wire harness of the ECM side.