ECD SYSTEM(w/ DPF), Diagnostic DTC:P1603

DTC Code DTC Name
P1603 Engine Stall History

DESCRIPTION

When the fuel pressure in the common rail drops below the threshold and the engine stalls, this DTC is stored.

It is necessary to check if the vehicle has run out of fuel before performing troubleshooting, as this DTC is also stored when the engine stalls due to running out of fuel.

P1603
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
During engine running at idle or higher speed for more than 1 minute

During engine running, common rail pressure drops to too low level (less than 12000 kPa) and engine stalls

(1 trip detection logic)

  • Battery

  • Low quality fuel

  • Injector compensation code

  • Fuel filter

  • Cylinder compression pressure

  • Injector assembly

  • Engine coolant temperature sensor

  • Glow system

  • Supply pump assembly

  • Common rail assembly

  • ECM
Related Data List
DTC No. Data List
P1603

  • Engine Speed

  • MAP

  • MAF

  • Coolant Temp

  • Battery Voltage

  • Engine Speed of Cyl #1 (to #4)

  • Intake Air

  • Target Common Rail Pressure

  • Fuel Press

  • Target Pump SCV Current

  • Injection Feedback Val #1 (to #4)

  • Injection Volume

  • Actual Throttle Position

  • Target EGR Pos.

  • Actual EGR Valve Pos.

  • EGR Close Lrn. Status

  • EGR Close Lrn. Val.

  • After Glow

CAUTION / NOTICE / HINT


  1. In order to obtain stable idling, glow system operation, fuel system operation and compression sufficient to maintain the target idling speed are necessary.

  2. Glow system


    1. The following malfunctions may be present in the glow system.


      1. Engine coolant temperature sensor malfunction.

      2. Glow plug assembly malfunction.

      3. Glow plug relay assembly malfunction.

  3. Fuel system


    1. The following malfunctions may be present in the fuel system.


      1. Fuel leakage.

      2. Problem with injector assemblies.

      3. Problem with supply pump assembly.

      4. Air in fuel line.

      5. Fuel pipes clog.

      6. Fuel filter clog.

  4. Engine assembly


    1. The following malfunctions may be present in the engine assembly.


      1. Insufficient compression.

    Tech Tips


    • In contrast to normal malfunction diagnosis for components, circuits and systems, DTCs P1603 is used to determine the malfunctioning area from the problem symptoms and freeze frame data when the user mentions problems such as engine stall.

      As these DTCs can be stored as a result of certain user actions, even if these DTCs are output, if the customer makes no mention of problems, clear these DTCs without performing any troubleshooting and return the vehicle to the customer.

    • If any other DTCs are output, perform troubleshooting for those DTCs first.

    • Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.

    • When confirming the freeze frame data, be sure to check all 5 sets of freeze frame data.

    • A01VJLAE46
      *a DTC is stored
      *b 0.5 seconds
      *c Freeze frame data recorded point

      The fourth set of freeze frame data is the data recorded when then the DTC is stored.

PROCEDURE


  1. READ OUTPUT DTC (RECORD STORED DTC AND FREEZE FRAME DATA (PROCEDURE 1))


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON and turn the tester on.

    3. Enter the following menus: Powertrain / Engine and ECT / DTC.

    4. Record the Stored DTC and Freeze Frame Data.

      Tech Tips

      This freeze frame data shows the actual engine conditions when engine stall trouble occurred.


    NEXT

  2. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P1603)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON and turn the tester on.

    3. Enter the following menus: Powertrain / Engine and ECT / DTC.

    4. Read DTCs.

      Result
      Result Proceed to
      DTC P1603 A
      DTC P1603 and other DTCs are output B

      Tech Tips

      If any DTCs other than DTC P1603 are output, troubleshoot those DTCs first.


    B

    GO TO DTC CHART Click here

    A

  3. DETERMINE CAUSE OF PROBLEM (CHECK FREEZE FRAME DATA)


    1. Determine the cause of the problem based on the freeze frame data recorded in Procedure 1.

      Battery Voltage
      Judgment of Data List Values Problem Cause Normal Condition Diagnosis Note
      "Battery Voltage" in freeze frame data is below 7 V Engine starting trouble may have occurred because battery is fully depleted During cranking: 7 V or higher The battery may be fully depleted or the battery terminals may be loose.
      "Battery Voltage" in Data List is below 7 V when cranking engine
      Fuel Press
      Judgment of Data List Values Problem Cause Normal Condition Diagnosis Note
      "Fuel Press" in freeze frame data is below 1000 kPa

      Problem supplying fuel to supply pump assembly (low pressure side)


      • Ran out of fuel, air in fuel, fuel frozen (in this case, values of "Fuel Temperature" and "Coolant Temp" in freeze frame data are low)

      • Fuel filter clog, fuel line clog (low pressure side) or fuel leak

      • Feed pump (in supply pump assembly) malfunctioning

      		 When in a stable condition such as when idling, the fuel pressure is within +/-10000 kPa of the target fuel pressure Disconnect the inlet hose from the supply pump assembly (low pressure side), operate the hand pump and check that fuel is being supplied.
      "Fuel Press" in Data List is below 1000 kPa 2 seconds after engine cranking is started
      "Fuel Press" in freeze frame data is below 20000 kPa

      Problem supplying fuel to supply pump assembly (low pressure side) or problem on high pressure side


      • Supply pump assembly (suction control valve operation malfunction)

      • Common rail assembly

      • Injector assembly (if glow plug is covered with fuel when removed, injector assembly of corresponding cylinder may be stuck open)

      • Fuel line clog (high pressure side), fuel leak

      		 When in stable condition such as when idling, fuel pressure is within +/-10000 kPa of target fuel pressure

      • For startup at least 20000 kPa of fuel pressure is needed (Take care there is a response lag when the pressure rises)

      • If "Fuel Press" is 15000 kPa or less, fuel injection control is stopped.
      After cranking is started, "Fuel Press" in Data List increases to 20000 kPa or more and then decreases to below 15000 kPa
      "Fuel Press" in freeze frame data or Data List changes within range of 40000 to 45000 kPa

      • Injector assembly (fuel injection problem caused by air in injector assembly)

      • Problem with injection system

      		 When in a stable condition such as when idling, the fuel pressure is within +/-10000 kPa of the target fuel pressure

      • If there is air in the injector assemblies for all cylinders, fuel cannot be injected.

      • If there is an injection system problem related to 2 or more cylinders, fuel delivery and injection control are stopped.

      • When the EDU circuit (built into ECM) has a malfunction, the ECM cannot perform diagnosis of malfunctions and DTCs are not stored as voltage is unstable during cranking. Also, an excess amount of fuel is supplied by the supply pump assembly and "Fuel Press" becomes larger than "Target Common Rail Pressure" as fuel injection cannot be performed even though a fuel injection signal is output due to a failure to detect malfunctions at engine start.
      Injection Feedback Val #1 (to #4)
      Judgment of Data List Values Problem Cause Normal Condition Diagnosis Note

      "Injection Feedback Val #1 (to #4)" in freeze frame data is not between -2.0 and 2.0 mm3/st

      		 Injector assembly malfunction or compression problem

      -2.0 to 2.0 mm3/st

      		 If an injector assembly is malfunctioning, even though the engine starts, idling is rough.

      "Injection Feedback Val #1 (to #4)" in Data List is not between -2.0 and 2.0 mm3/st when idling
      Injection Volume
      Judgment of Data List Values Problem Cause Normal Condition Diagnosis Note

      "Injection Volume" in Data List is 8 mm3/st or less and "Injection Feedback Val #1 (to #4)" is within range of +/-2 mm3/st when idling after warming up engine

      		 Injector assemblies of all cylinders malfunctioning - -

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