2007 Scion tC Base, AutomaticFACTORY OEM SERVICE PROCEDURE

Inspection Procedure

  1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (OPERATION OF CIRCUIT OPENING RELAY) 
    1. Connect the intelligent tester to the DLC3.
    2. Turn the ignition switch to the ON position and turn the tester on.
    3. Enter the following menus: DIAGNOSIS / ENHANCED OBD II /ACTIVE TEST/ FUEL PUMP/SPD.
    4. Check whether operating sounds can be heard while operating the relay using the tester.

      OK: 

      Operating sounds can be heard from relay. 

    OK: Go to step   7 

    NG: GO TO NEXT STEP 

  2. INSPECT ECM POWER SOURCE CIRCUIT 

    OK: REPAIR OR REPLACE POWER SOURCE CIRCUIT 

    OK: GO TO NEXT STEP 

  3. INSPECT CIRCUIT OPENING RELAY (C/OPN) 
    1. Disconnect the 1A, 1B, 1D and 1E instrument panel junction block connectors.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      CIRCUIT OPENING RELAY TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      1B(11) - 1A(8) 10 kΩ or higher
      1B(11) - 1A(8) Below 1 Ω (when battery voltage Is applied to terminals 1E (5) and 1D(1))

    NG: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

    Fig 1: Inspecting ECM (VC Voltage)
    G04869302Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: GO TO NEXT STEP 

  4. INSPECT ECM (FC VOLTAGE) 
    1. Disconnect the E4 and E8 connectors.
    2. Turn the ignition switch to the ON position.
    3. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      ECM TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      FC(E4-25) - E1 (E8-1) 9 to 14 V

    OK: REPLACE ECM 

    Fig 2: Disconnecting E4 And E8 Connectors
    G04869303Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: GO TO NEXT STEP 

  5. CHECK WIRE HARNESS (IGNITION SWITCH - CIRCUIT OPENING RELAY (C/OPN)) 
    1. Disconnect the 15 ignition switch connector.
      Fig 3: Identifying I5 Ignition Switch Connector Terminals
      G04869304Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the 1F instrument panel junction block connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      WIRE HARNESS TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      IG2 (15-6) - Instrument panel Junction block (1F-4) Below 1 Ω
      IG2 (15-6) or Instrument panel junction block (1F-4) - Body ground 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 4: Disconnecting 1F Instrument Panel Junction Block Connector
    G04869305Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: GO TO NEXT STEP 

  6. CHECK WIRE HARNESS (ECM - CIRCUIT OPENING RELAY) 
    1. Disconnect the E4 ECM connector.
      Fig 5: Disconnecting E4 ECM Connector
      G04869306Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the 1E instrument panel junction block connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      WIRE HARNESS TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      FC (E4-25) - Instrument panel junction block (1E-5) Below 1 Ω
      FC (E4-25) or Instrument panel junction block (1E-5) -Body ground 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 6: Disconnecting 1E Instrument Panel Junction Block Connector
    G04869307Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPLACE ECM 

  7. INSPECT FUEL PUMP 
    1. Inspect the fuel pump (See INSPECTION ).

    NG: REPLACE FUEL PUMP 

    OK: GO TO NEXT STEP 

  8. CHECK WIRE HARNESS (FUEL PUMP - CIRCUIT OPENING RELAY (C/OPN), BODY GROUND) 
    1. Disconnect the 1A instrument panel junction block connector.
      Fig 7: Disconnecting 1A Instrument Panel Junction Block Connector
      G04869308Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the F9 fuel pump connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      WIRE HARNESS TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      Instrument panel junction block (1A-8) - Fuel pump (F9-4) Below 1 Ω
      Fuel pump (F9-5) - Body ground Below 1 Ω
      Instrument panel junction block (1A-8) or Fuel pump (F9-4) - Body ground 10 kΩ or higher
      Fig 8: Identifying F9 Fuel Pump Connector Terminals
      G04869309Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: CHECK AND REPAIR HARNESS AND CONNECTOR (EFI RELAY - CIRCUIT OPENING RELAY) 

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.