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Home >> Lexus >> 2008 >> IS 250 RWD, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 174 (Engine Control System - SFI System Diagnostics (4 Of 4)) >> DTC P1235 High Pressure Fuel Pump Circuit; DTC P1236 High Pressure Fuel Pump No. 2 Circuit >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.

HINT

Read freeze frame data using the Techstream The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction

  1. CHECK DTC 
    1. Interchange the injector driver No 1 and No. 2 (See REMOVAL )
    2. Connect the Techstream to the DLC3.
    3. Turn the engine switch on (IG) and turn the Techstream ON
    4. Clear DTCs (See DTC CHECK/CLEAR )
      NOTE: Before clearing the DTCs, write them down.
    5. Start the engine.
    6. Enter the following menus: Powertrain / Engine / Trouble Codes.
    7. Read the DTCs
      Fig 1: Identifying Injector Driver No 1 And No. 2.
      G05751532Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Result 

      RESULT CHART

      Display (DTC Output) Proceed to
      DTCs do not change A
      DTCs change (change in malfunctioning cylinder or EDU code) B

    B: REPLACE INJECTOR DRIVER  (See REMOVAL )

    A: Go to next step 

  2. INSPECT SPILL CONTROL VALVE 
    1. Disconnect the spill control valve connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      1-2 20°C (68°F) 1 19 to 139 Ω
    3. Reconnect the spill control valve connector.
      4. Fig 2: Identifying Spill Control Valve Connector
      G04942853Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE FUEL PUMP FOR HIGH PRESSURE  (See REMOVAL )

    OK: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (INJECTOR DRIVER - SPILL CONTROL VALVE) 
    1. Disconnect the injector driver connector
    2. Disconnect the spill control valve connector
    3. Measure the resistance according to the value(s) in the table below

      Standard Resistance (Check for Open) 

      Injector Driver (No. 1) 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      E27-1 (FP+) - E76-1 Always Below 54 mΩ
      E27-4 (FP-) - E76-2 Always Below 54 mΩ
      Fig 3: Identifying Injector Driver Connector E27, E68 And Spill Control Valve Connector E76, E71
      G05751652Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Injector Driver (No. 2) 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      E68-1 (FP2+) - E71-1 Always Below 54 mΩ
      E68-4 (FP2-) - E71-2 Always Below 54 mΩ

      Standard Resistance (Check for Short) 

      Injector Driver (No. 1) 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      E27-1 (FP+) or E76-1 Engine ground Always 10 kΩ or more
      E27-4 (FP-) or E76-2 Engine ground Always 10 kΩ or more

      Injector Driver (No. 2) 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      E68-1 (FP2+) or E71-1 Engine ground Always 10 kΩ or more
      E68-4 (FP2-) or E71-2 Engine ground Always 10 kΩ or more
    4. Reconnect the injector driver connector and spill control valve connector

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (INJECTOR DRIVER - SPILL CONTRL VALVE) 

    OK: Go to next step 

  4. CHECK HARNESS AND CONNECTOR (INJECTOR DRIVER - ECM) 
    1. Disconnect the injector driver (No. 1) connector
    2. Disconnect the injector driver (No 2) connector.
    3. Disconnect the ECM connector.
    4. Measure the resistance according to the value(s) in the table below

      Standard Resistance (Check for Open) 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      E26-8 (FPD) - E5-11 (FPD) Always Below 1 Ω
      E26-7 (FPF) - E5-10 (FPF1) Always Below 1 Ω
      E67-8 (FPD2) - E5-13 (FPD2) Always Below 1 Ω
      E67-7 (FPF2) - E5-12 (FPF2) Always Below 1 Ω

      Standard Resistance (Check for Short) 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      E26-8 (FPD) or E5-11 (FPD) - Body ground Always 10 kΩ or higher
      E26-7 (FPF) or E5-10 (FPF1) - Body ground Always 10 kΩ or higher
      E67-8 (FPD2) or E5-13 (FPD2) - Body ground Always 10 kΩ or higher
      E67-7 (FPF2) or E5-12 (FPF2) - Body ground Always 10 kΩ or higher
    5. Reconnect the injector driver connectors and ECM connector
      6. Fig 4: Identifying Injector Driver Connectors E26, E67 And ECM Connector E5
      G05751653Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (INJECTOR DRIVER - ECM) 

    OK: REPLACE ECM  (See REMOVAL )

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