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Home >> Toyota >> 2011 >> Highlander Hybrid Limited >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 42 (Engine Control System (1AR-FE) (Diagnostic Codes (P1604 - U0101) & Circuit Tests)) >> SFI System >> Fuel Injector Circuit >> Procedure

Fuel Injector Circuit: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK TERMINAL VOLTAGE (FUEL INJECTOR POWER SOURCE) 
    1. Disconnect the fuel injector connectors.
      Fig 1: Identifying Fuel Injector Connectors
      GTY193300Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      B54-1 - Body ground Ignition switch ON 11 to 14 V
      B55-1 - Body ground Ignition switch ON 11 to 14 V
      B56-1 - Body ground Ignition switch ON 11 to 14 V
      B57-1 - Body ground Ignition switch ON 11 to 14 V
    4. Reconnect the fuel injector connectors.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (IG2 RELAY - FUEL INJECTOR) 

    OK: Go to next step 

  2. INSPECT FUEL INJECTOR (INJECTOR RESISTANCE) 
    1. Inspect the fuel injector, refer to INSPECTION - Step 1 .

    NG → See step   7 

    OK: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (FUEL INJECTOR - ECM) 
    1. Disconnect the ECM connector.
    2. Disconnect the fuel injector connectors.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      B54-2 - B48-7 (#10) Always Below 1 Ω
      B55-2 - B48-8 (#20) Always Below 1 Ω
      B56-2 - B48-9 (#30) Always Below 1 Ω
      B57-2 - B48-10 (#40) Always Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      B54-2 or B48-7 (#10) - Body ground Always 10 kΩ or higher
      B55-2 or B48-8 (#20) - Body ground Always 10 kΩ or higher
      B56-2 or B48-9 (#30) - Body ground Always 10 kΩ or higher
      B57-2 or B48-10 (#40) - Body ground Always 10 kΩ or higher
    4. Reconnect the fuel injector connectors.
    5. Reconnect the ECM connector.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  4. CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND) 
    1. Disconnect the ECM connectors.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      B48-1 (E01) - Body ground Always Below 1 Ω
      B49-12 (E02) - Body ground Always Below 1 Ω
    3. Reconnect the ECM connectors.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  5. INSPECT FUEL INJECTOR (INJECTION AND VOLUME) 
    1. Check the fuel injector injection and volume, refer to INSPECTION - Step 1 .

    NG → See step   7 

    OK → See step   6 

  6. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE 
  7. REPLACE FUEL INJECTOR. Refer to  REMOVAL 
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