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Home >> Lexus >> 2024 >> RC 350 Base, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 31 (Engine Control System (8AR-FTS) - Diagnostic Codes (08 Of 10)) >> SFI System >> DTC P1603-00: Engine Stall History [10/2015 - 11/2017] >> Procedure

DTC P1603-00: Engine Stall History [10/2015 - 11/2017]: Procedure

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  1. CHECK FOR ANY OTHER DTCS OUTPUT 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine / Trouble Codes.
    5. Read the DTCs.

      Powertrain > Engine > Trouble Codes 

      Result

      Result Proceed to
      Only DTC P1603-00 is output A
      DTCs other than P1603-00 are output B

      HINT: 

      • When DTC P1603-00 and P1605-00 are output simultaneously, perform the troubleshooting for P1605-00 first.
      • Using freeze frame data, confirm the conditions the moment the DTC was stored and after the DTC was stored. This information can be useful when troubleshooting.

    Result: 

    B 

    GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2015 - 08/2016]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2016 - 11/2017] 

    Result: 

    A 

    See step  2

  2. READ FREEZE FRAME DATA (ISC F/B LEARN TORQUE) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored.

      Refer to FREEZE FRAME DATA [10/2015 - 11/2017]

      Result

      Freeze Frame Data Item for DTC P1603-00 Result Suspected Area Action Proceed to
      ISC F/B Learn Torque Less than 15 Nm - Go to the next step A
      15 Nm or higher Throttle body with motor assembly Go to ENGINE STALLS (from step 11) B

    Result: 

    B 

    GO TO ENGINE STALLS. Refer to  Engine Stalls [10/2015 - 11/2017] 

    Result: 

    A 

    See step  3

  3. READ FREEZE FRAME DATA (A/F (O2) SENSOR VOLTAGE B1S1, SHORT FT BANK 1 AND LONG FT BANK 1) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored.

      Refer to FREEZE FRAME DATA [10/2015 - 11/2017]

      Result

      Freeze Frame Data Item for DTC P1603-00 Suspected Area Action Proceed to
      A/F (O2) Sensor Voltage B1S1 Short FT Bank 1 Long FT Bank 1
      2.8 V to 3.8 V -15% to 15% -15% to 15% - Go to the next step NEXT
      3.8 V or higher 15% or higher - Fuel pump Go to ENGINE STALLS (from step 20)
      Less than 2.8 V, or 3.8 V or higher Less than -15%, or 15% or higher Less than -15%, or 15% or higher
      • Mass air flow meter sub-assembly
      • Air fuel ratio sensor
      • Fuel pump
      		 Go to ENGINE STALLS (from step 15)*

      HINT: 

      *: If the value of A/F (O2) Sensor Voltage B1S1, Short FT Bank 1 or Long FT Bank 1 is as specified, malfunction of a component listed in the "Suspected Area" column of the table is suspected.

    Result: 

    NEXT 

    GO TO ENGINE STALLS. Refer to  Engine Stalls [10/2015 - 11/2017] 

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