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Section 357 (Fuse & Relay Identification): Inspection

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  1. INSPECT ENGINE ROOM R/B CIRCUIT 
    Fig 1: Identifying Engine Room R/B Relays
    G02904320Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 2: Locating Fuses Junction Boxes In Engine Room R/B (Backside)
    G02904321Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 3: Engine Room R/B (Backside) Circuit Diagram (1 Of 2)
    G02904322Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 4: Engine Room R/B (Backside) Circuit Diagram (2 Of 2)
    G02904323Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Remove the fuse from the junction block and inspect the connector on junction block side.
      ENGINE ROOM R/B (BACKSIDE) FUSES DESCRIPTION

      Fuse Tester connection Condition Specified condition
      TOWING 1 - Ground Constant Battery positive voltage
      MIR HTR 3 - Ground Constant Battery positive voltage
      RR HTR 5 - Ground Constant Battery positive voltage
      HAZ-TRN 7 - Ground Constant Battery positive voltage
      ALT-S 9 - Ground Constant Battery positive voltage
      NV-IR 13 - Ground Constant Battery positive voltage
      FR FOG 13 - Ground Constant Battery positive voltage
      BRK CTRL 15 - Ground Constant Battery positive voltage
      HEAD CLNER 17 - Ground Ignition switch ON Battery positive voltage
      FR-IG 19 - Ground Ignition switch ON Battery positive voltage
      PANEL 21 - Ground Light control switch HEAD or TAIL Battery positive voltage
      TOWING TAIL 23 - Ground Light control switch HEAD or TAIL Battery positive voltage
      TAIL 25 - Ground Light control switch HEAD or TAIL Battery positive voltage
      BAT 29 - Ground Constant Battery positive voltage
      TEL 31 - Ground Constant Battery positive voltage
      AMP 33 - Ground Constant Battery positive voltage
      EFI or ECD NO. 1 35 - Ground Constant Battery positive voltage
      AM2 37 - Ground Constant Battery positive voltage
      ETCS 39 - Ground Constant Battery positive voltage
      HORN 41 - Ground Constant Battery positive voltage
      HEAD LH-UPR 51 - Ground Light control switch HI or Flash Battery positive voltage
      HEAD RH-UPR 49 - Ground Light control switch HI or Flash Battery positive voltage
      HEAD LH-LWR 47 - Ground Light control switch HEAD Battery positive voltage
      HEAD RH-LWR 45 - Ground Light control switch HEAD Battery positive voltage
      ST1 1 - Ground Constant Battery positive voltage
      AHC 1 - Ground Constant Battery positive voltage
      ABS NO.1 1 - Ground Constant Battery positive voltage
      ABS NO.2 1 - Ground Constant Battery positive voltage
      STARTER 1 - Ground Constant Battery positive voltage

      If the circuit is not as specified, inspect the circuits connected to other parts.

    2. Remove the relay from the junction block and inspect the connector on junction block side.
      ENGINE ROOM R/B (BACKSIDE) RELAYS (1 OF 2) DESCRIPTION

      Relay Tester Connection Condition Specified condition
      AHC 1 - Ground Ignition switch ON Battery positive voltage
      ABS SOL 1 - Ground Ignition switch ON Battery positive voltage
      ABS MTR1 1 - Ground Constant Battery positive voltage
      ABS MTR2 1 - Ground Ignition switch ON Battery positive voltage
      STARTER 5 - Ground Constant Continuity
      STARTER 2 - Ground Ignition switch ON Battery positive voltage
      EFI or ECD 3 - Ground Constant Battery positive voltage
      C/OPN SPIL VLV 5 - Ground Constant Battery positive voltage
      C/OPN SPIL VLV 2 - Ground Ignition switch ON Continuity
      F/P PUMP
      ST CUT
      VISC MG 2 - Ground      		 Ignition switch ON Battery positive voltage
      F/P PUMP
      ST CUT
      VISC MG 3 - Ground      		 Ignition switch ON Continuity
      HTR 5 - Ground Constant Battery positive voltage
      HTR 1 - Ground Ignition switch ON Continuity

      If the circuit is not as specified, inspect the circuits connected to other parts.

    3. Inspect Engine Room Junction Block Inner Circuit:

    Inspect the connector on junction block side.

    HINT:

    Remove the junction block from the vehicle.

    ENGINE ROOM R/B (BACKSIDE) RELAYS (2 OF 2) DESCRIPTION

    Relay Tester connection Condition Specified condition
    IG1 NO. 1 50 (1B) - 40 (1B) Constant Continuity
    IG1 NO. 1 50 (1B) - 39 (1B) Constant Continuity
    IG1 NO. 1 50 (1B) - 45 (1B) Constant Continuity
    IG1 NO. 1 50 (1B) - 56 (1B) Constant Continuity
    IG1 NO. 1 50 (1B) - 55 (1B) Constant Continuity
    IG1 NO. 1 50 (1B) - 44 (1B) Constant Continuity
    IG1 NO. 1 50 (1B) - 43 (1B) Constant Continuity
    IG1 NO. 1 50 (1B) - 41 (1B) Constant Continuity
    IG1 NO. 1 50 (1B) - 42 (1B) Constant Continuity
    IG1 NO. 1 2 (1C) - 47 (1B) Apply B+ between terminals 50 (1B) and 40 (1B). Continuity
    IG1 NO. 1 2 (1C) - 60 (1A) Apply B+ between terminals 50 (1B) and 40 (1B). Continuity
    MIR HTR 50 (1B) - 48 (1B) Constant Continuity
    MIR HTR 2 (1C) - 66 (1B) Apply B+ between terminals 50 (1B) and 48 (1B). Continuity
    RR HTR 50 (1B) - 52 (1B) Constant Continuity
    RR HTR 50 (1B) - 57 (1B) Constant Continuity
    RR HTR 2 (1C) - 71 (1B) Apply B+ between terminals 50 (1B) and 52 (1B). Continuity
    RR HTR 70 (1B) - 71 (1B) Apply B+ between terminals 50 (1B) and 52 (1B). Continuity
    FR FOG 61 (1A) - 59 (1B) Constant Continuity
    FR FOG 2 (1C) - 62 (1A) Apply B+ between terminals 61 (1A) and 59 (1B). Continuity
    FR FOG 2 (1C) - 64 (1A) Apply B+ between terminals 61 (1A) and 59 (1B). Continuity
    TAIL 2 (1C) - 49 (1B) Constant Continuity
    TAIL 2 (1C) - 51 (1A) Apply B+ between terminals 2 (1C) and 49 (1B). Continuity
    TAIL 2 (1C) - 50 (1A) Apply B+ between terminals 2 (1C) and 49 (1B). Continuity
    TAIL 2 (1C) - 59 (1A) Apply B+ between terminals 2 (1C) and 49 (1B). Continuity
    TAIL 2 (1C) - 49 (1A) Apply B+ between terminals 2 (1C) and 49 (1B). Continuity
    TAIL 2 (1C) - 58 (1A) Apply B+ between terminals 2 (1C) and 49 (1B). Continuity
    TAIL 2 (1C) - 60 (1B) Apply B+ between terminals 2 (1C) and 49 (1B). Continuity
    TAIL 2 (1C) - 58 (1B) Apply B+ between terminals 2 (1C) and 49 (1B). Continuity
    TAIL 2 (1C) - 67 (1B) Apply B+ between terminals 2 (1C) and 49 (1B). Continuity
    TAIL 2 (1C) - 69 (1B) Apply B+ between terminals 2 (1C) and 49 (1B). Continuity
    PANEL 2 (1C) - 64 (1B) Apply B+ between terminals 2 (1C) and 49 (1B). Continuity
    HEAD 1 (1C) - 22 (1B) Constant Continuity
    HEAD 1 (1C) - 33 (1B) Apply B+ between terminals 1 (1C) and 22 (1B). Continuity
    HEAD 1 (1C) - 19 (1A) Apply B+ between terminals 1 (1C) and 22 (1B). Continuity
    HEAD 1 (1C) - 26 (1A) Apply B+ between terminals 1 (1C) and 22 (1B). Continuity
    HEAD 1 (1C) - 28 (1A) Apply B+ between terminals 1 (1C) and 22 (1B). Continuity
    HEAD 1 (1C) - 20 (1A) Apply B+ between terminals 1 (1C) and 22 (1B). Continuity
    HEAD 1 (1C) - 9 (1A) Apply B+ between terminals 1 (1C) and 22 (1B). Continuity
    HEAD HI 1 (1C) - 10 (1B) Constant Continuity
    HEAD HI 1 (1C) - 12 (1A) Apply B+ between terminals 1 (1C) and 10 (1B). Continuity
    HEAD HI 1 (1C) - 1 (1A) Apply B+ between terminals 1 (1C) and 10 (1B). Continuity
    HEAD HI 1 (1C) - 8 (1A) Apply B+ between terminals 1 (1C) and 10 (1B). Continuity
    HORN 1 (1C) - 21 (1B) Constant Continuity
    HORN 1 (1C) - 4 (1A) Apply B+ between terminals 1 (1C) and 21 (1B). Continuity
    HORN 1 (1C) - 15 (1A) Apply B+ between terminals 1 (1C) and 21 (1B). Continuity

    If the circuit is not as specified, replace it with junction block assembly.

    HINT:

    The relay is built in engine room junction block. Also the relay is constructed with a relay block that is in the junction block as a unit. To disconnect the wire harness connecting with relay block is impossible. If the relay has a malfunction, replace it with junction block assembly wire harness together.

  2. INSPECT COWL SIDE J/B LH CIRCUIT 
    Fig 5: Locating Fuses Junction Box In Cowl Side J/B LH
    G02904324Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 6: Locating Relays Of Cowl Side J/B LH (Backside)
    G02904325Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Remove the fuse from the junction block and inspect the connector on junction block side.
      COWL SIDE J/B LH (BACKSIDE) FUSES DESCRIPTION

      Fuse Tester connection Condition Specified condition
      AHC-IG 2 - Ground Ignition switch ON Battery positive voltage
      POWER HTR 4 - Ground Ignition switch ON Battery positive voltage
      FUEL HTR 6 - Ground Ignition switch ON Battery positive voltage
      AHC-B 8 - Ground Constant Battery positive voltage
      DEFOG 10 - Ground Constant Battery positive voltage
      AM1 12 - Ground Constant Battery positive voltage
      ACC 13 - Ground Ignition switch ACC Battery positive voltage
      CIG 15 - Ground Ignition switch ACC Battery positive voltage
      PWR OUTLET 17 - Ground Ignition switch ACC Battery positive voltage
      OBD-220 - Ground Constant Battery positive voltage
      STOP 22 - Ground Constant Battery positive voltage
      A/C 24 - Ground Ignition switch ON Battery positive voltage
      BATT CHARGE 26 - Ground Constant Battery positive voltage
      DBL LOCK 39 - Ground Constant Battery positive voltage
      ECU-B1 29 - Ground Constant Battery positive voltage
      ECU-IG1 32 - Ground Ignition switch ON Battery positive voltage
      GAUGE1 34 - Ground Ignition switch ON Battery positive voltage
      EFI or ECD NO.2 35 - Ground Constant Battery positive voltage
      RR WIPER 37 - Ground Ignition switch ON Battery positive voltage
      SUNROOF 39 - Ground Constant Battery positive voltage
      DOOR 41 - Ground Constant Battery positive voltage
      LH SEAT 43 - Ground Constant Battery positive voltage
      IDLE UP 46 - Ground Rear deffoger system ON Battery positive voltage

      If the circuit is not as specified, inspect the circuits connected to other parts.

    2. Remove the relay from the junction block and inspect the connector on junction block side.
      COWL SIDE J/B LH (BACKSIDE) RELAY DESCRIPTION

      Relay Tester connection Condition Specified condition
      DOME 1 - Ground Constant Battery positive voltage
      DOME 5 - Ground Constant Battery positive voltage
      ACC 5 - Ground Constant Battery positive voltage
      ACC 2 - Ground Ignition switch ON Battery positive voltage
      IG1 NO.2 5 - Ground Constant Battery positive voltage
      IG1 NO.2 2 - Ground Ignition switch ON Battery positive voltage
      DEFOG 5 - Ground Constant Battery positive voltage
      DEFOG 1 - Ground Ignition switch ON Battery positive voltage

      If the circuit is not as specified, inspect the circuits connected to other parts.

  3. INSPECT COWL SIDE J/B RH CIRCUIT 
    Fig 7: Locating Fuses Box In Cowl Side J/B RH
    G02904326Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 8: Locating Relays In Cowl Side J/B RH (Backside)
    G02904327Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Remove the fuse from the junction block and inspect the connector on junction block side.
      COWL SIDE J/B RH (BACKSIDE) FUSE DESCRIPTION

      Fuse Tester connection Condition Specified condition
      P/W (RL) 2 - Ground Constant Battery positive voltage
      P/W (FL) 4 - Ground Constant Battery positive voltage
      VGRS 2 - Ground Constant Battery positive voltage
      DOME 5 - Ground Constant Battery positive voltage
      RADIO 7 - Ground Constant Battery positive voltage
      WASHER 10-Ground Ignition switch ON Battery positive voltage
      DIFF 12-Ground Ignition switch ON Battery positive voltage
      ECU-B2 13-Ground Constant Battery positive voltage
      P/W(FR) 15-Ground Constant Battery positive voltage
      P/W(RR) 17-Ground Constant Battery positive voltage
      SECURITY 20 - Ground Constant Battery positive voltage
      IGN 21 - Ground Ignition switch ON Battery positive voltage
      MET 23 - Ground Ignition switch ON Battery positive voltage
      GAUGE2 25 - Ground Ignition switch ON Battery positive voltage
      SEAT HTR 27 - Ground Ignition switch ON Battery positive voltage
      ECU-IG2 29 - Ground Ignition switch ON Battery positive voltage
      WIPER 31 - Ground Ignition switch ON Battery positive voltage
      RH SEAT 33 - Ground Constant Battery positive voltage
      RR A/C 35 - Ground Constant Battery positive voltage
      TIL & TEL 37 - Ground Constant Battery positive voltage

      If the circuit is not as specified, inspect the circuits connected to other parts.

      Remove the relay from the junction block and inspect the connector on junction block side.

      COWL SIDE J/B RH (BACKSIDE) RELAY DESCRIPTION

      Relay Tester connection Condition Specified condition
      ACC CUT 2 - Ground Constant Battery positive voltage
      ACC CUT 4 - Ground Ignition Switch ACC Battery positive voltage
      IG1 NO.3 5 - Ground Constant Battery positive voltage
      IG1 NO.3 2 - Ground Ignition Switch ON Battery positive voltage

      If the circuit is not as specified, inspect the circuits connected to other parts.

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