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Terminals Of Ecu

  1. CHECK TURN SIGNAL SWITCH (COMBINATION SWITCH) 
    Fig 1: Identifying Turn Signal Switch Terminals
    G05292568Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the C11 switch connector.
    2. Measure the voltage and resistance of the wire harness side connector.
      VOLTAGE AND RESISTANCE SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      B (C11-1) - Body ground L-B - Body ground B power supply Always 10 to 14 V
      IG (C11-2) - Body ground V-W - Body ground IG power supply Ignition switch ON 10 to 14 V
      IG (C11-2) - Body ground V-W - Body ground IG power supply Ignition switch OFF Below 1 V
      E (C11-8) - Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Reconnect the C11 switch connector.
    4. Measure the voltage of the connector.
      VOLTAGE SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      HEAD (C11-4) - E (C11-8) R-B - W-B Combination light control switch HEAD signal Combination light control switch except HEAD 10 to 14 V
      HEAD (C11-4) - E (C11-8) R-B - W-B Combination light control switch HEAD signal Combination light control switch HEAD Below 1 V
      TX1 (C11-11) - E (C11-8) R - W-B Back-up communication bus-circuit Ignition switch ON Signal waveform

      If the result is not as specified, the switch may have a malfunction.

  2. CHECK DRIVER SIDE JUNCTION BLOCK (DRIVER SIDE JUNCTION BLOCK ECU) 
    Fig 2: Identifying Driver Side Junction Block ECU Connector Terminals
    G05292569Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the D2 and D4 ECU connectors.
    2. Disconnect the 2A, 2C, 2D and 2G junction block connectors.
    3. Measure the voltage and resistance of the wire harness side connector.
      VOLTAGE AND RESISTANCE SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      IG (2C-8) - Body ground L - Body ground IG power supply Ignition switch ON 10 to 14 V
      IG (2C-8) - Body ground L - Body ground IG power supply Ignition switch OFF Below 1 V
      ACC (2G-7) - Body ground W-G - Body ground ACC power supply Ignition switch ACC 10 to 14 V
      ACC (2G-7) - Body ground W-G - Body ground ACC power supply Ignition switch OFF Below 1 V
      MPX-B (D4-5) - Body ground L-B - Body ground MPX-B power supply Always 10 to 14 V
      PANEL1 (2A-1)-Body ground W - Body ground PANE1 power supply Always 10 to 14 V
      HRLY (D2-7) - Body ground R-Y - Body ground Headlight control switch signal Always 10 to 14 V
      GND (2G-8) - Body ground W-B - Body ground Ground Always Below 1 Ω
      GND2(D4-1)-Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction on the wire harness side.

    4. Reconnect the D2 and D4 ECU connectors.
    5. Reconnect the 2A, 2C, 2D and 2G junction block connectors.
    6. Measure the voltage of the connectors.
      VOLTAGE SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      TURN LH (2D-2) - GND (2G-8) G-B - W-B Turn signal light LH signal Turn signal switch Left 10 to 14 V
      TURN LH (2D-2) - GND (2G-8) G-B - W-B Turn signal light LH signal Turn signal switch Right Below 1 V
      TURN RH (2D-6) - GND (2G-8) G-Y - W-B Turn signal light RH signal Turn signal switch Right 10 to 14 V
      TURN RH (2D-6) - GND (2G-8) G-Y - W-B Turn signal light RH signal Turn signal switch Left Below 1 V
      STP (D4-4) - GND (2G-8) G-W - W-B Stop light signal Brake pedal depressed 10 to 14 V
      STP (D4-4) - GND (2G-8) G-W - W-B Stop light signal Brake pedal released Below 1 V
      STPI (D2-13) - GND (2G-8) G-W - W-B Stop light switch signal Brake pedal depressed 10 to 14 V
      STPI (D2-13) - GND (2G-8) G-W - W-B Stop light switch signal Brake pedal released Below 1 V
      DBIL (D3-10) - GND(2G-8) R - W-B Illumination signal Buckle switch ON 10 to 14 V
      DBIL (D3-10) - GND (2G-8) R - W-B Illumination signal Buckle switch OFF Below 1 V
      DBKL (D3-8) - GND (2G-8) R-W - W-B Buckle switch signal Buckle switch ON 10 to 14 V
      DBKL (D3-8) - GND (2G-8) R-W - W-B Buckle switch signal Buckle switch OFF Below 1 V
      CTLB (D5-2) - GND (2G-8) W-R - W-B Automatic light control sensor signal Ignition switch ON 10 to 14 V
      CTLB (D5-2) - GND (2G-8) W-R - W-B Automatic light control sensor signal Ignition switch OFF Below 1 V
      CTLS (D5-13) - GND (2G-8) B-Y - W-B Automatic light control sensor signal Ignition switch ON 10 to 14 V
      CTLS (D5-13) - GND (2G-8) B-Y - W-B Automatic light control sensor signal Ignition switch OFF Below 1 V
      CTLE (D5-14) - GND (2G-8) V-W - W-B Automatic light control sensor signal Always Below 1 V
      TR+ (D5-12) - GND (2G-8) W-G - W-B Illumination power source circuit Combination light control switch OFF 10 to 14 V
      TR+ (D5-12) - GND (2G-8) W-G - W-B Illumination power source circuit Combination light control switch TAIL or HEAD Below 1 V
      TR1 (D5-6) - GND (2G-8) B - W-B Illumination power source circuit Combination light control switch OFF 10 to 14 V
      TR1 (D5-6) - GND (2G-8) B - W-B Illumination power source circuit Combination light control switch TAIL or HEAD Below 1 V
      TR2 (D5-7) - GND (2G-8) L - W-B Illumination power source circuit Combination light control switch OFF 10 to 14 V
      TR2 (D5-7) - GND (2G-8) L - W-B Illumination power source circuit Combination light control switch TAIL or HEAD Below 1 V
      TR3 (D5-18) - GND (2G-8) Y - W-B Illumination power source circuit Combination light control switch OFF 10 to 14 V
      TR3 (D5-18) - GND (2G-8) Y - W-B Illumination power source circuit Combination light control switch TAIL or HEAD Below 1 V
      PANEL2 (2E-5) - GND (2G-8) G - W-B Illumination power source circuit Combination light control switch TAIL or HEAD 10 to 14 V
      PANEL2 (2E-5) - GND (2G-8) G - W-B Illumination power source circuit Combination light control switch OFF Below 1 V
      HEAD (D4-8) - GND (2G-8) R-B - W-B Headlight signal Combination light control switch TAIL 10 to 14 V
      HEAD (D4-8) - GND (2G-8) R-B - W-B Headlight signal Combination light control switch OFF or HEAD Below 1 V
      HAZ (D4-2) - GND (2G-8) Y - W-B Hazard warning switch signal Hazard warning switch ON 10 to 14 V
      HAZ (D4-2) - GND (2G-8) Y - W-B Hazard warning switch signal Hazard warning switch OFF Below 1 V
      TSW (D5-5) - GND (2G-8) W - W-B Luggage compartment door operation switch signal Luggage compartment door operation switch ON 10 to 14 V
      TSW (D5-5) - GND (2G-8) W - W-B Luggage compartment door operation switch signal Luggage compartment door operation switch OFF Below 1 V
      BU+ (D4-10) - GND (2G-8) R - W-B Back-up communication bus-circuit Ignition switch ON Signal waveform
      BU- (D3-6) - GND (2G-8) L - W-B Back-up communication bus-circuit Ignition switch ON Signal waveform
      DBIL (D3-10) - GND (2G-8) I R - W-B Headlight beam level control warning signal Headlight beam level control system warning normal condition 10 to 14 V
      DBIL (D3-10) - GND (2G-8) I R - W-B Headlight beam level control warning signal Headlight beam level control system warning condition Below 1 V

      If the result is not as specified, the junction block (ECU) may have a malfunction.

  3. CHECK PASSENGER SIDE JUNCTION BLOCK (PASSENGER SIDE JUNCTION BLOCK ECU) 
    Fig 3: Identifying Passenger Side Junction Block ECU Connector Terminals
    G05292570Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the P4 ECU connector.
    2. Disconnect the 3B, 3E, 3F and 3G junction block connectors.
    3. Measure the voltage and resistance of the wire harness side connectors.
      VOLTAGE AND RESISTANCE SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      MPX-IG (3E-3) - Body ground V-W - Body ground MPX-IG power supply Ignition switch ON 10 to 14 V
      MPX-IG (3E-3) - Body ground V-W - Body ground MPX-IG power supply Ignition switch OFF Below 1 V
      ACC (3F-8) - Body ground W-G - Body ground ACC power supply Ignition switch ACC 10 to 14 V
      ACC (3F-8) - Body ground W-G - Body ground ACC power supply Ignition switch OFF Below 1 V
      MPX-B (3B-1) - Body ground L-W - Body ground MPX-B power supply Always 10 to 14 V
      GND (3G-8) - Body ground W-B - Body ground Ground Always Below 1 Ω
      GND1 (P4-11)-Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction on the wire harness side.

    4. Reconnect the P4 ECU connector.
    5. Reconnect the 3B, 3E, 3F and 3G junction block connectors.
    6. Measure the voltage of the connectors.
      VOLTAGE SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      PBIL (P5-2) - GND (3G-8) R - W-B Passenger side buckle switch signal Passenger side buckle switch ON 10 to 14 V
      PBIL (P5-2) - GND (3G-8) R - W-B Passenger side buckle switch signal Passenger side buckle switch OFF Below 1 V
      ILE (P4-9) - GND (3G-8) R-W - W-B Room light and ignition key cylinder light signal All doors are closed 10 to 14 V
      ILE (P4-9) - GND (3G-8) R-W - W-B Room light and ignition key cylinder light signal All doors are opened Below 1 V
      FSPT (P4-16) - GND (3G-8) L-W-B Stop light signal Brake pedal depressed 10 to 14 V
      FSPT (P4-16) - GND (3G-8) L - W-B Stop light signal Brake pedal released Below 1 V
      WNG (P6-15) - GND (3G-8) L - W-B Headlight beam level control warning signal Brake pedal depressed 10 to 14 V
      WNG (P6-15) - GND (3G-8) L - W-B Headlight beam level control warning signal Brake pedal released Below 1 V
      HDLV (P6-13) - GND (2G-8) R-B - W-B Headlight beam level control warning signal Ignition switch ON and combination light control switch HEAD or DRL system OFF 10 to 14 V
      HDLV (P6-13) - GND (2G-8) R-B - W-B Headlight beam level control warning signal Ignition switch ON and combination light control switch HEAD or DRL system ON Below 1 V

      If the result is not as specified, the junction block (ECU) may have a malfunction.

  4. CHECK LUGGAGE ROOM JUNCTION BLOCK (LUGGAGE ROOM JUNCTION BLOCK ECU) 
    Fig 4: Identifying Luggage Room Junction Block ECU Connector Terminals
    G05292571Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the L24 ECU connector.
    2. Disconnect the 6A and 6F junction block connectors.
    3. Measure the voltage and resistance of the wire harness side connectors.
      VOLTAGE AND RESISTANCE SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      MPX-IG (6F-13) - Body ground V-W - Body ground MPX-IG power supply Ignition switch ON 10 to 14 V
      MPX-IG (6F-13) - Body ground V-W - Body ground MPX-IG power supply Ignition switch OFF Below 1 V
      MPX-B (6F-12) - Body ground L-B - Body ground MPX-B power supply Always 10 to 14 V
      HIC (6F-1) - Body ground W-R - Body ground HIC power supply Always 10 to 14 V
      P-GND (6A-2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      P-GND (6A-5) - Body ground W-B - Body ground Ground Always Below 1 Ω
      SG (L24-5) - Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction on the wire harness side.

    4. Reconnect the L24 ECU connector.
    5. Reconnect the 6A and 6F junction block connectors.
    6. Measure the voltage of the connectors.
      VOLTAGE SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      TIL1 (L24-1) - SG (L24-5) GR - W-B Taillight switch signal Combination light control switch TAIL 10 to 14 V
      TIL1 (L24-1) - SG (L24-5) GR - W-B Taillight switch signal Combination light control switch OFF Below 1 V
      TIL1 (L24-12) - SG (L24-5) V - W-B Taillight switch signal Combination light control switch TAIL 10 to 14 V
      TIL1 (L24-12) - SG (L24-5) V - W-B Taillight switch signal Combination light control switch OFF Below 1 V
      TIL2 (L23-2) - SG (L24-5) L - W-B Taillight switch signal Combination light control switch TAIL 10 to 14 V
      TIL2 (L23-2) - SG (L24-5) L - W-B Taillight switch signal Combination light control switch OFF Below 1 V
      TIL2 (L23-1) - SG (L24-5) Y - W-B Taillight switch signal Combination light control switch TAIL 10 to 14 V
      TIL2 (L23-1) - SG (L24-5) Y - W-B Taillight switch signal Combination light control switch OFF Below 1 V
      LCE1 (L22-10) - SG (L24-5) W-B - W-B Taillight switch signal Combination light control switch OFF 10 to 14 V
      LCE1 (L22-10) - SG (L24-5) W-B - W-B Taillight switch signal Combination light control switch TAIL Below 1 V
      STP1 (L23-8) - SG (L24-5) R - W-B Stop light switch signal Brake pedal depressed 10 to 14 V
      STP1 (L23-8) - SG (L24-5) R - W-B Stop light switch signal Brake pedal released Below 1 V
      STP1 (L23-7) - SG (L24-5) R-W - W-B Stop light switch signal Brake pedal depressed 10 to 14 V
      STP1 (L23-7) - SG (L24-5) R-W - W-B Stop light switch signal Brake pedal released Below 1 V
      STP3 (L23-6) - SG (L24-5) G-W - W-B Stop light switch signal Brake pedal depressed 10 to 14 V
      STP3 (L23-6) - SG (L24-5) G-W - W-B Stop light switch signal Brake pedal released Below 1 V
      BCK1 (L22-13) - SG (L24-5) R-B - W-B Back-up light switch signal Ignition switch ON, shift lever on R position 10 to 14 V
      BCK1 (L22-13) - SG (L24-5) R - B-W-B Back-up light switch signal Ignition switch ON, shift lever not on R Below 1 V
      LCTY (L22-4) - SG (L24-5) G-R - W-B Courtesy switch signal Luggage door open 10 to 14 V
      LCTY (L22-4) - SG (L24-5) G-R - W-B Courtesy switch signal Luggage door closed Below 1 V
      LCM+ (L22-8) - SG (L24-5) GR-L - W-B Luggage compartment door close signal Luggage compartment door closer system operates 10 to 14 V
      LCM+ (L22-8) - SG (L24-5) GR-L - W-B Luggage compartment door close signal Luggage compartment door closer system does not operate Below 1 V

      If the result is not as specified, the junction block (ECU) may have a malfunction.

  5. CHECK ENGINE ROOM NO. 2 RELAY BLOCK (FRONT LIGHT ECU (FRONT CONTROLLER)) 
    Fig 5: Identifying Engine Room No 2 Relay Block Connector Terminals
    G05292572Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Remove the front light ECU.
    2. Measure the voltage and resistance of the wire harness side connector.
      VOLTAGE AND RESISTANCE SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      FMIG (7) - Body ground V-W - Body ground FMIG power supply Ignition switch ON 10 to 14 V
      FMIG (7) - Body ground V-W - Body ground FMIG power supply Ignition switch OFF Below 1 V
      FHHI(1) (13) - Body ground Y - Body ground FHHI (1) power supply Always 10 to 14 V
      FHHI(2) (4) - Body ground Y - Body ground FHHI (2) power supply Always 10 to 14 V
      FMB3 (8) - Body ground L-B - Body ground FMB3 power supply Always 10 to 14 V
      GND (12) - Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction on the wire harness side.

  6. CHECK DRIVER DOOR ECU 
    Fig 6: Identifying Driver Door ECU Connector Terminals
    G05292573Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the D19 ECU connector.
    2. Measure the voltage and resistance of the wire harness side connector.
      VOLTAGE AND RESISTANCE SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      SIG (D19-5) - Body ground V-W - Body ground SIG power supply Ignition switch ON 10 to 14 V
      SIG (D19-5) - Body ground V-W - Body ground SIG power supply Ignition switch OFF Below 1 V
      BDR (D19-6) - Body ground B-R - Body ground BDR power supply Always 10 to 14 V
      CPUB (D19-4) - Body ground L-O - Body ground CPUB power supply Always 10 to 14 V
      GND (D19-1) - Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Reconnect the D19 ECU connector.
    4. Measure the voltage of the connectors.
      VOLTAGE SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      CYL (D17-18) - GND (D19-1) G - W-B Door courtesy light LH signal Driver side door open 10 to 14 V
      CYL (D17-18) - GND (D19-1) G - W-B Door courtesy light LH signal Driver side door closed Below 1 V
      CTY (D17-27) - GND (D19-1) R-W - W-B Door courtesy switch LH signal Door courtesy switch LH ON 10 to 14 V
      CTY (D17-27) - GND (D19-1) R-W - W-B Door courtesy switch LH signal Door courtesy switch LH OFF Below 1 V

      If the result is not as specified, the ECU may have a malfunction.

  7. CHECK PASSENGER DOOR ECU 
    Fig 7: Identifying Passenger Door ECU Connector Terminals
    G05292574Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the P11 ECU connector.
    2. Measure the voltage and resistance of the wire harness side connector.
      VOLTAGE AND RESISTANCE SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      SIG (P11-5) - Body ground V-W - Body ground SIG power supply Ignition switch ON 10 to 14 V
      SIG (P11-5) - Body ground V-W - Body ground SIG power supply Ignition switch OFF Below 1 V
      BDR (P11-6) - Body ground G-Y - Body ground BDR power supply Always 10 to 14 V
      CPUB (P11-4) - Body ground L-O - Body ground CPUB power supply Always 10 to 14 V
      GND (P11-1) - Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Reconnect the P11 ECU connector.
    4. Measure the voltage of the connectors.
      VOLTAGE SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      CYL (P11-18) - GND (P11-1) G - W-B Door courtesy light RH signal Driver side door open 10 to 14 V
      CYL (P11-18) - GND (P11-1) G - W-B Door courtesy light RH signal Driver side door closed Below 1 V
      CTY (P11-27) - GND (P11-1) R-W - W-B Door courtesy switch RH signal Door courtesy switch RH ON 10 to 14 V
      CTY (P11-27) - GND (P11-1) R-W - W-B Door courtesy switch RH signal Door courtesy switch RH OFF Below 1 V

      If the result is not as specified, the ECU may have a malfunction.

  8. CHECK AFS ECU 
    Fig 8: Identifying AFS ECU Connector Terminals
    G05292575Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the A31 ECU connector.
    2. Measure the voltage and resistance of the wire harness side connector.
      VOLTAGE AND RESISTANCE SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      IG (A31-2) - Body ground R-L - Body ground IG power supply Ignition switch ON 10 to 14 V
      IG (A31-2) - Body ground R-L - Body ground IG power supply Ignition switch OFF Below 1 V
      NSW (A31-4) - Body ground G - Body ground AFS OFF switch signal AFS switch ON Below 1 Ω
      NSW (A31-4) - Body ground G - Body ground AFS OFF switch signal AFS switch OFF 10 kΩ or higher
      E1 (A31-1) - Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Reconnect the A31 ECU connector.
    4. Measure the voltage of the connector.
      VOLTAGE SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      SPDL (A30-6) - E1 (A31-1) Y-R - W-B Vehicle speed signal Drive at approx. 30 km/h (19 mph) Pulse generation (see  e waveform 1)
      SBF (A30-1) - SFG (A30-17) L - Y-B Vehicle height signal Ignition switch ON 4.5 to 5.0 V
      SBF (A30-1) - SFG (A30-17) L - Y-B Vehicle height signal Ignition switch OFF Below 1 V
      SBR (A31-9) - SGR (A31-20) L - Y-B Vehicle height signal Ignition switch ON 4.5 to 5.0 V
      SBR (A31-9) - SGR (A31-20) L - Y-B Vehicle height signal Ignition switch OFF Below 1 V
      SBFL (A30-2) - SHG (A30-17) W - R-B Vehicle height signal Ignition switch ON, vehicle is standing still or being bounced 4.5 to 5.0 V
      SBFL (A30-2) - SHG (A30-17) W - R-B Vehicle height signal Ignition switch OFF Below 1 V
      SBRL (A31-10) - SGR (A31-20) W-R - B Vehicle height signal Ignition switch ON, vehicle is standing still or being bounced 4.5 to 5.0 V
      SBRL (A31-10) - SGR (A31-20) W - R-B Vehicle height signal Ignition switch OFF Below 1 V
      BL1+ (A30-25) - BL1- (A30-26) L - L-R Headlight swivel actuator LH Engine running, light control switch in HEAD, driving at more than 30 km/h (19 mph)and turning steering wheel more than 12° Pulse generation (see  f waveform 2)
      BL1+ (A30-25) - BL1- (A30-26) L - L-R Headlight swivel actuator LH Ignition switch OFF Below 1 V
      BL2+ (A30-27) - BL2- (A30-28) L-W - B-R Headlight swivel actuator LH Engine running, light control switch in HEAD, driving at more than 30 km/h (19 mph)and turning steering wheel more than 12° Pulse generation (see  f waveform 2)
      BL2+ (A30-27) - BL2-(A30-28) L-W - B-R Headlight swivel actuator LH Ignition switch OFF Below 1 V
      SMGL (A30-19) - E1 (A31-1) B - W-B Headlight swivel actuator LH Always  
      SML (A30-24) - SMGL (A30-19) W - L-B Headlight swivel actuator LH Ignition switch ON 4.5 to 5.0 V
      SML (A30-24) - SMGL (A30-19) W - L-B Headlight swivel actuator LH Ignition switch OFF Below 1 V
      SMBL (A30-22) - SMGL (A30-19) R - B-B Headlight swivel actuator LH Ignition switch ON 4.5 to 5.0 V
      SMBL (A30-22) - SMGL (A30-19) R - B-B Headlight swivel actuator LH Ignition switch OFF Below 1 V
      BR1+ (A30-9) - BR1- (A30-10) BR - Y-R Headlight swivel actuator RH Engine running, light control switch in HEAD, driving at more than 30 km/h (19 mph) and turning steering wheel more than 12° Pulse generation (see  f waveform 2)
      BR1+ (A30-9) - BR1- (A30-10) BR - Y-R Headlight swivel actuator RH Ignition switch OFF Below 1 V
      BR2+ (A30-11) - BR2- (A30-12) Y - G-G Headlight swivel actuator RH Engine running, light control switch in HEAD, driving at more than 30 km/h (19 mph) and turning steering wheel more than 12° Pulse generation (see  f waveform 2)
      BR2+ (A30-11) - BR2- (A30-12) Y - G-G Headlight swivel actuator RH Ignition switch OFF Below 1 V
      SMGR (A31-18) - E1 (A31-1) L-Y - W-B Headlight swivel actuator RH Always  
      SMR (A31-23) - SMGR (A31-18) G-B - L-Y Headlight swivel actuator RH Ignition switch ON 4.5 to 5.0 V
      SMR (A31-23) - SMGR (A31-18) G-B - L-Y Headlight swivel actuator RH Ignition switch OFF Below 1 V
      SMBR (A31-21) - SMGR (A31-18) LG - L-Y Headlight swivel actuator RH Ignition switch ON 4.5 to 5.0 V
      SMBR (A31-21) - SMGR (A31-18) LG - L-Y Headlight swivel actuator RH Ignition switch OFF Below 1 V
      LL1+ (A30-29) - LL1- (A30-30) R-Y - B-W Headlight beam level control actuator LH Engine running, light control switch in HEAD, vehicle is standing still or being bounced Pulse generation (see  f waveform 2)
      LL1+ (A30-29) - LL1- (A30-30) R-Y - B-W Headlight beam level control actuator LH Ignition switch OFF Below 1 V
      LL2+ (A30-31) - LL2- (A30-32) Y - B-Y Headlight beam level control actuator LH Engine running, light control switch in HEAD, vehicle is standing still or being bounced Pulse generation (see  f waveform 2)
      LL2+ (A30-31) - LL2- (A30-32) Y - B-Y Headlight beam level control actuator LH Ignition switch OFF Below 1 V
      LR1+ (A30-13) - LR1- (A30-14) R-Y - B-W Headlight beam level control actuator RH Engine running, light control switch in HEAD, vehicle is standing still or being bounced Pulse generation (see  f waveform 2)
      LR1+ (A30-13) - LR1- (A30-14) R-Y - B-W Headlight beam level control actuator RH Ignition switch OFF Below 1 V
      LR2+ (A30-15) - LR2- (A30-16) P - L-W Headlight beam level control actuator RH Engine running, light control switch in HEAD, vehicle is standing still or being bounced Pulse generation (see  f waveform 2)
      LR2+ (A30-15) - LR2- (A30-16) P - L-W Headlight beam level control actuator RH Ignition switch OFF Below 1 V
      SS+ (A31-7) - SS- (A31-8) B - W Steering sensor signal Engine idling, slowly turn steering wheel Pulse generation

      If the result is not as specified, the ECU may have a malfunction.

    5. Using an oscilloscope, check the signal waveform of the ECU.

      Waveform 1 

      WAVEFORM REFERENCE (WAVEFORM 1)

      Symbols (Terminal No.) Tool setting Condition
      SPDL (H14-6) - E1 (A31-1) 5 V/DIV., 2 msec./DIV. Drive at approx. 30 km/h (19 mph)
      Fig 9: Waveform Diagram (Waveform 1)
      G05292576Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Using an oscilloscope, check the signal waveform of the ECU.

      Waveform 2 

      WAVEFORM REFERENCE (WAVEFORM 2)

      Symbols (Terminal No.) Tool setting Condition
      LH+ (14-23) - LHG (H14-22)
      LHT (H14-24) - LHG (H14-22)
      LH- (H14-25) - LHG (H14-22)
      LHE (H14-26) - LHG (H14-22)
      RH+ (H14-10) - RHG (H14-9)
      RHT (H14-11) - RHG (H14-9)
      RH- (H14-12) - RHG (H14-9)
      RHE (H14-13) - RHG (H14-9)      		 5 V/DIV., 10msec./DIV. Combination light control switch HEAD or daytime running light is ON and engine running, and press and hold down vehicle
      Fig 10: Waveform Diagram (Waveform 2)
      G05292577Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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