Ecd System (For I-Art) Data List / Active Test

Ecd System (For I-Art) -- Data List / Active Test

1. Injector assembly
   
2. Wire harness
   
3. Fuel
   
4. ECM
   

1. If the learned value for the i-ART injection volume stays at the minimum or maximum, this flag changes to NG.
   
2. If the i-ART injection volume learned value reaches the minimum or maximum and the injection volume does not become the requested amount unless an update is performed, this flag changes to NG.
   
3. This item is reset when the ignition switch is turned off.
   

1. Injector assembly
   
2. Wire harness
   
3. Fuel
   
4. ECM
   

1. This is history data of flags set when the learned value for each injector is stuck.
   
2. This item records the number of trips that i-ART Learning Status became NG (when the learning status of i-ART is abnormal, this history displays 1 or higher).
   
3. If any of the counters is 1 or more when there are symptoms of rough idle, black smoke, white smoke, poor drivability, poor output, knocking, or starting trouble, or when any related DTCs are stored, the problem may have occurred due to foreign matter in the fuel system. Replace the fuel filter, etc. and perform repairs according to the troubleshooting procedures.
   
4. This item is reset when the battery cable is disconnected or when DTCs are cleared.
   

1. Injector assembly
   
2. Wire harness
   
3. Fuel
   
4. Fuel filter element sub-assembly
   
5. ECM
   

1. The number of times each injector leaked
   
2. When the drop in pressure (change in slope) is larger than the threshold and there is a time difference in the drop in pressure between this cylinder and other cylinders, the system determines that the injector leaked.
   
3. If any of the counters is 1 or more when there are symptoms of rough idle, black smoke, white smoke, poor drivability, poor output, knocking, or starting trouble, or when any related DTCs are stored, the problem may have occurred due to foreign matter in the fuel system. Replace the fuel filter, etc. and perform repairs according to the troubleshooting procedures.
   
4. This item is reset when the battery cable is disconnected or when DTCs are cleared.
   

1. This is the injection timing before pilot 1 and 2.
   
2. The pre-pilot injection timing displays the value calculated by the ECM.
   

1. This is the injection timing before pilot 1 and 2.
   
2. The pre-pilot injection timing displays the value calculated by the ECM.
   

1. Displays the total fuel injection volume for all cylinders (includes the pilot, main and after injection timing).
   
2. This calculates the most recent fuel injection volume for each injector (Injection Volume #1 to #4). For example, #1 → #3 → #4 → #2 → #1, etc. (the value differs depending on engine speed and sampling timing).
   
3. This can be acquired from the output value from the pressure sensors built into the injectors. This is an estimate of the actual injection volume based on the pressure drop behavior due to fuel injection.
   

1. Displays the fuel injection volume for each injector (includes the pilot, main and after injection timing).
   
2. Perform an inspection while comparing it with the injection volume.
   
3. This can be acquired from the output value from the pressure sensors built into the injectors. This is an estimate of the actual injection volume based on the pressure drop behavior due to fuel injection.
   
4. The compensation injection volume (Injection Feedback Val) for each cylinder is added to these values. Therefore, the value between cylinders may be different.
   

1. Fuel supply pump assembly
   
2. High pressure pipes
   
3. Injector assembly
   
4. Feed pump (fuel supply pump assembly)
   
5. Fuel filter element sub-assembly
   
6. Pressure discharge valve
   
7. Air in the fuel pipes
   
8. Lack of fuel
   

1. Displays the fuel pressure for each injector.
   
2. The output voltage from the pressure sensor in each injector is converted to a pressure value using the adjustment value for each cylinder which is read from the memory built into the injectors.
   
3. This pressure value is not for pressure control, and it is influenced by the pressure pulsation due to fuel injection. Therefore, do not use it for comparing with Target Common Rail Pressure. Use Fuel Press instead for comparing with Target Common Rail Pressure.
   

1. Displays the fuel temperature of each injector.
   
2. The output voltage from the pressure sensor in each injector acquired via INJ communication is converted to a temperature value using the adjustment value for each cylinder which is read from the memory built into the injectors.
   
3. After fully cold soaking the engine, the fuel temperature is the same as the outside air temperature.
   

1. Idling: 3 to 25%
   
2. Running without load (2500 rpm): 20 to 30%
   

1. Idling: 4 to 20 gm/s
   
2. Running without load (2000 rpm): 14 to 58 gm/s
   

HINT:

Depends on EGR rate

1. Mass air flow meter
   
2. Mass air flow meter circuit
   
3. Intake related clog or leak
   
4. Exhaust related clog
   
5. Turbocharger sub-assembly
   
6. Leak or clog in passages for turbocharger
   
7. Malfunction in which EGR valve does not close
   

1. Based on the MAF, the ECM controls the fuel injection volume, injection timing, EGR, etc.
   
2. If the value is always approximately 0 gm/s:
   
1. Mass air flow meter power source circuit is open.
   
2. VG circuit is open or shorted.
   
3. EVG circuit is open.
   

1. 50 to 400 rpm: Cranking
   
2. 700 to 800 rpm: Idling with warm engine
   

1. Crankshaft position sensor
   
2. Crankshaft position sensor circuit
   

1. Idling: 93 to 106 kPa (depends on barometric pressure and amount of EGR)
   
2. Engine running at 3000 rpm: 106 to 125 kPa
   

1. Manifold absolute pressure sensor
   
2. Intake related clog or leak
   
3. Exhaust related clog
   
4. Turbocharger sub-assembly
   
5. Leak or clog in passages for turbocharger
   
6. EGR valve stuck open
   
7. Exhaust leak
   
8. Throttle valve stuck closed
   

1. When the ignition switch is ON or the vehicle is idling, the intake manifold absolute pressure and atmospheric pressure are approximately the same (standard atmospheric pressure = 101 kPa).
   Above approximately 1500 rpm, the turbo becomes effective and the pressure becomes higher than atmospheric pressure.
   
2. Inspect while comparing with "Target Booster Pressure".
   
3. With the accelerator fully open, if the actual manifold absolute pressure (MAP) is low compared to the target booster pressure by at least 20 kPa for 5 seconds or more, a feeling of insufficient power will occur.
   

1. Speed sensor
   
2. Speed sensor circuit
   

1. Engine coolant temperature sensor
   
2. Thermostat
   

1. If the value is -40°C (-40°F) or 140°C (284°F), the sensor circuit is open or shorted.
   
2. After a long soak, the coolant temperature, intake air temperature and ambient temperature are approximately equal.
   

1. After a long soak, the engine coolant temperature, intake air temperature and ambient temperature are approximately equal.
   
2. If the value is -40°C (-40°F) or 140°C (284°F), the sensor circuit is open or shorted.
   

1. This is the intake air temperature at the intake manifold (after the intercooler).
   
2. During fail-safe operation, the value is set to 165°C (329°F). As the value is set to a high temperature, the turbo pressure may be suppressed and there may be a lack of power.
   

1. No electrical load at idling:
   20 to 60%
   

1. High electrical load at idling:
   100%
   

1. Battery deterioration
   
2. Alternator malfunction
   
3. Electric load, lights, etc.
   

1. This outputs the alternator generation duty and is used to determine the electrical load.
   
2. Can be used to determine whether a higher-than-normal injection volume at idle, etc. is due to electrical loading or from some other source. For example, when the duty is not high but the idling injection volume is high, there is injector volume degradation or high engine friction.
   
3. Can be used for judging whether or not a malfunctioning component in the electrical system is generating continual generation requests (e.g., battery deterioration is causing an unending full recharge request, etc.). Regardless of whether or not an auxiliary device like the A/C or heater is active, if the alternator duty is always at the maximum value, there is an electrical system abnormality, like battery deterioration.
   

1. OFF malfunction (ignition switch (STA) is ON but the signal is OFF and the starter is operating): Wire harness is open or shorted to ground
   
2. ON malfunction (ignition switch (STA) is off but the signal is ON and the starter is not operating): Wire harness is shorted to +B
   
3. Operation malfunction: ignition switch malfunction, starter relay malfunction, starter malfunction, battery or battery cable is defective, or wire harness is open or shorted
   

1. Ignition switch is ON but the starter does not operate: Starting is not possible
   
2. Ignition switch is off but the starter continues to operate: STA signal malfunction (P0617) is stored
   

1. ON: Starter is operating
   
2. OFF: Starter is not operating
   

1. ON: Operating
   
2. OFF: Not operating
   

1. A/C switch
   
2. A/C amplifier
   
3. A/C system malfunction, wire harness between A/C amplifier and ECU open or shorted
   

1. Engine speed decreases temporarily when the A/C is operating.
   

1. ON: Brake pedal depressed
   
2. OFF: Brake pedal released
   

1. OFF malfunction: Wire harness (stop light switch to ECM, stop light switch to +B) open or shorted to ground
   
2. ON malfunction: Wire harness (stop light switch to ECM) shorted to +B
   
3. Stop light switch
   

1. ON: Light is on (Brake pedal is depressed)
   
2. OFF: Light is off (Brake pedal is released)
   

1. ON: Normal
   
2. OFF: Engine cannot be started due to immobiliser communication malfunction
   

1. Use of a non-registered key
   
2. Key battery is fully depleted
   

1. With the ignition switch ON, when the difference between the atmospheric pressure sensor and intake manifold absolute pressure is 10 kPa or more, there is a malfunction in one of the sensors.
   
2. With the ignition switch ON, when the atmospheric pressure is 0 kPa or 140 kPa, there is a malfunction in the sensor circuit.
   
3. Standard atmospheric pressure: 101 kPa.
   
4. For every 100 m increase in elevation, pressure drops by 1 kPa.
   This varies by weather (high atmospheric pressure, low atmospheric pressure).
   

1. Distance driven since the DTCs were cleared.
   
2. (Data List "Distance from DTC clear") - (Freeze frame data "Distance from DTC cleared") = Distance driven since the abnormality occurred.
   

1. Number of engine warmup since DTCs were cleared.
   
2. (Data List "Warmup Cycle Cleared DTC") - (Freeze frame data "Warmup Cycle Cleared DTC") = Warmup cycles since the abnormality occurred.
   

1. Accelerator pedal released:
   0%
   
2. Accelerator pedal fully depressed:
   100%
   

1. Accelerator pedal position sensor opening position
   
2. ECT requested opening position
   
3. Cruise requested opening position
   
4. VSC requested opening position
   

1. "Accel Position" is the accelerator opening amount (%) for engine control use.
   
2. When the accelerator pedal position sensor output itself (Accelerator Position 1, Accelerator Position 2) is in the normal voltage range, another actuator malfunction has caused the fail-safe function to restrict the accelerator.
   
3. Without cruise, ECT or VSC requests, and without accelerator restriction by the fail-safe function, this is adjusted in proportion to the amount the accelerator pedal is depressed by the driver.
   
4. Accelerator pedal released: 0%
   
5. Accelerator pedal fully depressed: 100%
   

1. Accelerator pedal released:
   10 to 22%
   
2. Accelerator pedal fully depressed:
   52 to 90%
   

1. Accelerator pedal released:
   24 to 40%
   
2. Accelerator pedal fully depressed:
   68 to 99%
   

1. Output only when the "Check the Cylinder Compression" Active Test is performed.
   
2. Indicates the speed of each cylinder when cranking.
   Example - Normal: Engine speeds of all cylinders are approximately equal.
   When No. 1 cylinder compression is low, "Engine Speed of Cyl #1" is approximately 300 rpm, and "Engine Speed of Cyl #2 to #4" is approximately 200 rpm.
   

1. Output only when the Active Test "Check the Cylinder Compression" is performed.
   
2. Indicates the average engine speed of all cylinders during cranking.
   

1. MT: Manual transaxle
   
2. ECT 5th: Automatic transaxle
   

HINT:

*: "DC" refers to the DC motor system.

1. DC motor system.
   
2. Negative-pressure diaphragm system.
   
3. Step motor system.
   

1. Inspect the (actual) fuel pressure, comparing it with the common rail target value.
   
2. Considered normal when the actual fuel pressure is within +/-5000 kPa of the target fuel pressure under stable conditions when idling after warming up the engine.
   

1. Fuel supply pump assembly
   
2. High pressure pipes
   
3. Injector assembly
   
4. Feed pump (fuel supply pump assembly)
   
5. Fuel filter element sub-assembly
   
6. Pressure discharge valve
   
7. Air in the fuel pipes
   
8. Lack of fuel
   

1. Fuel Press indicates the output value from the No. 1 injector assembly (fuel pressure sensor).
   
2. Inspect by comparing the fuel pressure with the target fuel pressure.
   
3. When in a stable condition such as when idling after warming up the engine, the fuel pressure is within +/-5000 kPa of the target fuel pressure.
   
4. The ECM uses fuel pressure for feedback control of the target fuel pressure via the fuel supply pump assembly.
   The injection amount is determined based on the injection timing and fuel pressure.
   Also, the spray pattern is selected based on the fuel pressure.
   
5. For startup, at least 25000 kPa of fuel pressure is needed (take care as there is a response lag when the pressure rises).
   
6. When the fuel pressure is below 25000 kPa, it may cause rough idling.
   
7. When the fuel pressure has decreased by 20000 kPa from the target fuel pressure, there may be a lack of power.
   
8. If actual fuel pressure is 5000 kPa higher than the target fuel pressure, P1229 will be stored. When the actual fuel pressure is lower than the target fuel pressure, "P1608 Lack of Power" may be detected depending on the degree of deviation from the target pressure.
   
9. When the fuel pressure is higher than 220000 kPa, DTC P0088 will be stored.
   

1. Fuel supply pump assembly
   
2. High pressure pipes
   
3. Injector assembly
   
4. Feed pump (fuel supply pump assembly)
   
5. Fuel filter element sub-assembly
   
6. Pressure discharge valve
   
7. Air in the fuel pipes
   
8. Lack of fuel
   

1. Suction control valve malfunction
   
2. Clogged fuel filter element sub-assembly
   

1. ECU-calculated value for the suction control valve actuation target current.
   
2. Value is large when a high fuel pressure is desired.
   
3. Normally, the value is between 800 and 2500 mA.
   
4. If the value is stuck at 3000 mA or higher, it indicates that the operation is poor (poor movement due to deposits, etc.).
   
5. When this deviates from the standard value, it indicates that for some reason, even though the pump is running hard, the actual fuel pressure is inconsistent with the target fuel pressure.
   

1. Min.: -100 mA
   
2. Max.: 100 mA
   

1. Suction control valve malfunction
   
2. Clogged fuel filter element sub-assembly
   

1. When the actual engine speed does not match the target idling speed, this corrects the injection volume.
   If this item displays 10 mm³/st or more or -10 mm³/st or less even with the engine completely warmed up and the air conditioning and other electrical loads off, the internal parts of the engine may be damaged, or the fuel injection system or other auxiliary components may be malfunctioning.
   
2. Only calculated and reflected at idle.
   

1. Idling: 1
   
2. Not idling: 0
   

1. A Piezo injector has a big operation noise when idling. To reduce the noise level, this item lowers driving energy while idling. This item displays the value for controlling driving energy.
   
2. If the value is abnormal, DTC P1626 and P1627 will be stored.
   
3. If the injector is not a Piezo injector, the value will be always "0".
   

1. Injection amount for each combustion.
   
2. If injector assemblies are clogged, fuel quality is poor, the fuel filter element sub-assembly is clogged, or engine friction increases, "Injection Volume" will increase.
   
3. If there is a malfunction due to low turbocharger pressure or a low intake air volume, the injection volume is limited and there is a lack of power.
   

1. Suction control valve malfunction
   
2. Clogged fuel filter element sub-assembly
   

1. When the (actual) fuel pressure is equal to the target fuel pressure, this value becomes 0.
   
2. This indicator can be used for diagnosing supply pump related malfunctions.
   
3. When this value (absolute value) is large, it indicates that the difference between the actual and target fuel pressure is also large.
   A positive value indicates that the pressure feed is being increased due to insufficient pressure. A negative value indicates that pressure is being reduced due to excessive rail pressure.
   When the suction control valve does not close properly, it causes rail overpressure, and this value and the "Pump SCV Learning Value" slip to the negative volume side.
   

1. Injector clogging
   
2. Injector deterioration
   
3. Decrease in cylinder compression
   
4. Injector compensation code is incorrectly set (forgot to input code after replacement or made mistake during setting of code after replacing ECM with one from another vehicle)
   

1. When idling after warmup, the injection amount for each cylinder is corrected to optimize the difference between the engine speed of each cylinder.
   Example: For cylinders that are slowing the engine speed compared to other cylinders, the injection volume is increased.
   
2. "Injection Feedback Val" more than 3.0 mm³/st: Injector breakdown is causing injection volume deviation, or insufficient compression is causing poor combustion.
   
3. Even if "Injection Feedback Val" for a cylinder is less than -3.0 mm³/st, the cylinder with this value does not necessarily have a problem.
   

   HINT:

   1. The ECM adjusts each cylinder so that the average "Injection Feedback Val" of the 4 cylinders is approximately 0 mm³/st.
      
   2. If more than one cylinder has a positive correction value, a normal cylinder may have a value less than -3.0 mm³/st.
      

1. When the fuel pressure becomes 15000 kPa or less, "Main Injection Period" is set to 0.
   
2. When the engine will not start, confirm that injection is performed.
   
3. When P0093, P0627 or P062D is stored, there is an engine stall request. At that time, "Main Injection Period" equals 0.
   

   HINT:

   As the engine stalls 1 minute after the MIL illuminates, freeze frame data cannot be checked.

1. -15.0 to -11°CA (During double pilot)
   
2. -9.5 to -5.5°CA (During triple pilot)
   

1. -10.5 to -6.5°CA (During double pilot)
   
2. -5.8 to -1.8°CA (During triple pilot)
   

1. -4.5 to -0.5°CA (During double pilot)
   
2. -2.0 to -2.0°CA (During triple pilot)
   

1. When value is out of range and approaching 0%: mass air flow meter degradation, intake or exhaust system blockage
   
2. When value is out of range and approaching 100%: EGR pipe blockage
   

1. Fully open: 100%.
   
2. Fully closed: 0%.
   
3. Used for comparison to "Actual EGR Valve Pos.".
   

1. EGR valve stuck open: Poor starts (engine does not stop), black smoke, white smoke, lack of power
   
2. EGR valve stuck closed: Increased turbo booster noise
   

1. Fully open: 100%.
   
2. Fully closed: 0%.
   
3. Inspect while comparing to "Target EGR Position".
   
4. Check the valve movement via the Active Test.
   
5. Sometimes malfunctions only occur around a certain temperature, so refer to the engine coolant temperature and outside temperature at the time the malfunction occurred.
   

1. This EGR Motor Duty #1 is calculated based on Target EGR Valve Position to actuate the EGR valve.
   
2. To 0%: Close side EGR valve actuation.
   
3. To 100%: Open side EGR valve actuation.
   
4. When this value is large but the actual valve position does not reach the target valve position, there is an unable to open malfunction.
   

1. OK: It is possible to perform the "Control the EGR Step Position" and "Activate the EGR Valve Close" Active Tests.
   
2. NG: It is not possible to perform the "Control the EGR Step Position" and "Activate the EGR Valve Close" Active Tests.
   

1. This value is the EGR position sensor output voltage.
   
2. When the value is at the upper or lower limit of the normal range, it is possible that a foreign object is lodged in the EGR valve seat area.
   
3. As the lower and upper limits are 0 V and 1 V respectively, if the value becomes stuck at either of these values, there is a malfunction in the lift sensor or the valve position may be misaligned (foreign matter is present, etc.).
   

1. "OK" means the fully closed position learning has completed normally.
   
2. When NG, the learned fully closed position may be outside of the normal range.
   When NG, there may be foreign matter stuck in the valve.
   

HINT:

After disconnecting and reconnecting the battery cable, if the ignition switch has not been turned off once, learning may not be completed.

1. ON: Vacuum switching valve (for EGR bypass valve) is ON
   
2. OFF: Vacuum switching valve (for EGR bypass valve) is OFF
   

1. Vacuum switching valve (for EGR bypass valve)
   
2. Vacuum switching valve (for EGR bypass valve) circuit
   

1. When EGR Cooler Bypass VSV is ON, the value for EGR Cooler Bypass Position is Cooler and, when EGR Cooler Bypass VSV is OFF, the value for EGR Cooler Bypass Position is Bypass.
   
2. The EGR cooler bypass VSV is controlled by the ECM and the vacuum switching valve (for EGR bypass valve) is opened and closed by the vacuum created by the vacuum pump.
   

1. Cooler: EGR Cooler Bypass VSV is "ON"
   
2. Bypass: EGR Cooler Bypass VSV is "OFF"
   

1. Vacuum switching valve (for EGR bypass valve)
   
2. Vacuum switching valve (for EGR bypass valve) circuit
   

1. When EGR Cooler Bypass VSV is ON, the value for EGR Cooler Bypass Position is Cooler and, when EGR Cooler Bypass VSV is OFF, the value for EGR Cooler Bypass Position is Bypass.
   
2. The EGR cooler bypass VSV is controlled by the ECM and the vacuum switching valve (for EGR bypass valve) is opened and closed by the vacuum created by the vacuum pump.
   

1. Ignition switch ON: 60 to 80%
   
2. Warmed-up and idling: 10 to 80%
   

1. Stuck closed: Engine stall, difficult to start, rough idling, lack of power, black smoke, white smoke
   
2. Stuck open: Loud turbocharging sound, bad vibration when engine is stopped
   
3. When the ECM detects a malfunction with the diesel throttle (MIL on), engine power is restricted but city driving is possible.
   

1. Throttle position sensor output voltage is converted using 5 V = 100%.
   
2. When fully closed: 14%.
   
3. When fully open: 70%.
   
4. When the ignition switch is turned from off to ON, the throttle valve fully opens once.
   
5. When the ignition switch is turned from ON to off, the throttle valve fully closes once.
   

1. Throttle valve fully opened: 0%
   
2. Throttle valve fully closed: 100%
   

1. Stuck closed: Engine stall, difficult to start, lack of power, black smoke, rough idle
   
2. Stuck open: Loud turbocharging sound, bad vibration when engine is stopped
   
3. When ECM detects a malfunction of the diesel throttle (MIL on), engine power is restricted so that the vehicle can drive with a maximum speed of 80 to 100 km/h.
   

1. Fully closed: 100%.
   
2. Fully open: 0%.
   

   HINT:

   There is no connection with the accelerator. However, under full load, the throttle is usually fully open (0%).

1. When the ignition switch is turned from ON to off and 5 seconds elapse, learning of "Throttle Close Learning Val." will be complete.
   
2. When "Throttle Close Learning Val." is outside of the normal range, a foreign object may be lodged in the throttle valve.
   
3. If the value is stuck at the upper limit of 21.25 deg, there is a chance that a malfunction is present.
   However, as the initial value for the learned value is 21.25 deg, it is necessary to check the value after learning is completed.
   

1. If the system is functioning properly, learning will be performed when the ignition switch is turned from ON to off.
   
2. NG indicates that a foreign object may be lodged in the throttle valve or actuator components, or a disconnection/short exists in the signal wires.
   

1. Inspect while comparing with "MAP".
   
2. With the accelerator fully open, if the actual manifold absolute pressure (MAP) is low compared to the target booster pressure by at least 20 kPa for 5 sec. or more, a feeling of a lack of power will occur.
   
3. When the vehicle is driven with the engine speed at 3000 rpm or more and the accelerator pedal fully depressed, "MAP" is approximately equal to "Target Booster Pressure".
   

1. "VN Turbo Command" is a command value.
   
2. 0%: Vanes fully open (contraction of actuation rods)
   
3. 90% or more: Vanes fully closed (extension of actuation rods)
   
4. When this value is large, the turbo works well.
   
5. There is no actual opening angle data to handle the VN turbo command value.
   

1. The maximum vane opening amount is displayed in %.
   
2. The VN turbo is operated between VN Turbo Max Angle and VN Turbo Min Angle when the Test the Turbo Charger Step Motor Active Test is performed.
   

1. The minimum vane opening amount is displayed in %.
   
2. The VN turbo is operated between VN Turbo Max Angle and VN Turbo Min Angle when the Test the Turbo Charger Step Motor Active Test is performed.
   

HINT:

1. Run Dist of Previous Trip in the freeze frame data present when the startability malfunction occurred (DTC P1604 detected) indicates the distance driven during the previous trip, but in all other cases, such as for the snapshot data of the Data List (real-time measurements), or for freeze frame data present when DTCs other than P1604 were detected, the value indicates the distance driven during the current trip.
   
2. If DTCs indicating insufficient power or problems with the diesel throttle or EGR valve are stored, confirm this item in the freeze frame data of the stored DTCs to determine the distance driven when the DTCs were stored. The distance driven can be used as a reference when troubleshooting.
   

1. By comparing Glow Request Lighting Time to IG-ON Time, the operation state (whether the engine was started, etc.) can be determined.
   
2. If the malfunction occurred when starting a cold engine at 0°C (32°F) or less, this item is useful in determining whether the engine was started after the glow plug indicator lights turned off.
   

1. By comparing Glow Request Lighting Time to IG-ON Time, the operation state (whether the engine was started, etc.) can be determined.
   
2. If the malfunction occurred when starting a cold engine at 0°C (32°F) or less, this item is useful in determining whether the engine was started after the glow plug indicator lights turned off.
   

1. This item indicates cylinders which had speeds lower than the other cylinders.
   
2. This item indicates cylinders which are likely to be the cause of rough idle.
   

1. Mass air flow meter sub-assembly (value is out of range)
   
2. Intake system blockage
   
3. Disconnected air hoses (intake system)
   
4. EGR system (EGR valve closing malfunction)
   
5. Nozzle vane (turbo) movement problems
   

1. When DTC P1608 is output, this item indicates whether the cause of lack of power is related to the intake air amount.
   
2. This item indicates whether the intake air amount measured by the mass air flow meter sub-assembly was insufficient, which would cause the fuel injection volume to be reduced for a certain period of time. If this is the case, this item displays "ON" and DTC P1608 (lack of engine power) is stored.
   
3. This item is "ON" when the intake air amount is low due to blockage in the intake system, disconnection of hoses or an excessive amount of EGR, and also when the intake air amount is measured to be low due to deterioration of the mass air flow meter sub-assembly.
   

1. Nozzle vane (turbo) stuck
   
2. Disconnected air hoses (intake system)
   
3. Manifold absolute pressure sensor
   
4. Atmospheric pressure sensor (built into ECM)
   
5. Difference between atmospheric pressure and intake pressure
   

1. When DTC P1608 is output, this item indicates whether the cause of lack of power is due to the boost pressure.
   
2. This item indicates whether the actual boost pressure was insufficient compared to the target boost pressure, which would cause the fuel injection volume to be reduced for a certain period of time. If this is the case, this item displays "ON" and DTC P1608 (lack of engine power) is stored.
   

1. Suction control valve (movement problems)
   
2. Fuel leak
   
3. Fuel pressure sensor (built into injector assembly)
   

1. When DTC P1608 is output, this item indicates whether the cause of lack of power is the common rail pressure.
   
2. This item indicates whether the actual common rail pressure was lower than the target pressure for a certain period of time. If this is the case, this item displays "ON" and DTC P1608 (lack of engine power) is stored.
   

1. Engine coolant temperature sensor
   
2. Engine coolant leak
   
3. Radiator clog
   

1. When DTC P1608 is output, this item indicates whether the cause of lack of power is due to a high engine coolant temperature.
   
2. This item indicates whether the fuel injection volume was reduced for a certain period of time due to a high engine coolant temperature (overheating). If this is the case, this item displays "ON" and DTC P1608 (lack of engine power) is stored.
   

1. Mass air flow meter sub-assembly
   
2. Turbocharger sub-assembly
   
3. Pipes between turbocharger sub-assembly and intake manifold are disconnected or leaking
   
4. Pipes between mass air flow meter sub-assembly and turbocharger sub-assembly are disconnected or leaking
   

1. Even when the system is normal, the value may deviate from the range specified in Normal Condition for a short period of time (approximately 1 second).
   
2. This item indicates the ratio of the intake air amount to the estimated intake air amount. The estimated air amount is calculated using the intake manifold pressure and intake air temperature.
   
3. When DTC P1608 is stored, this item is useful in determining whether there is a problem in the turbocharger system or a disconnected or leaking pipe in the high pressure intake system when the boost pressure is insufficient.
   
4. When performing troubleshooting, this information is only valid when there is a high load (the diesel throttle is fully open) and the EGR system is off.