DTC P1052:00 [SKYACTIV-D 1.5]

id0102q2377100

Note
•  To determine the malfunctioning part, proceed with the diagnostics from “Function Inspection Using M-MDS”.

Details On DTCs

DESCRIPTION

Injection quantity too high cylinder No.1
DETECTION CONDITION
Determination conditions
•  Large torque fluctuation condition continues in No.1 cylinder while main injection is performed 40 times in cylinder No.1 by fuel injector No.1
Preconditions
•  Vehicle speed: 2 km/h {2 mph} or more
•  APP: 0.1% or less
•  Engine speed: 850 rpm or less
•  ECT: 40 °C {104 °F} or more
•  IAT (IAT sensor No.1): −10 °C {14 °F} or more
•  Fuel pressure at common rail: 35 MPa {357 kgf/cm2, 5077 psi} or more
•  During fuel injection
•  Diesel particulate filter regeneration control is not performed
•  Other than moment clutch is engaged or released (MTX)
•  Other than moment gear is shifted (ATX)
•  The following DTC is not detected:
―  Fuel injector or related circuit malfunction: P0201:00, P0202:00, P0203:00, P0204:00, P02EE:00, P02EF:00, P02F0:00, P02F1:00, P1378:00, P1379:00, P2146:00, P2147:00, P2148:00, P2149:00, P2150:00, P2151:00
―  Internal PCM malfunction: P062B:00
―  ECT sensor or related circuit malfunction: P0116:00, P0117:00, P0118:00
―  IAT sensor or related circuit malfunction: P0111:00, P0112:00, P0113:00
―  BARO sensor or related circuit malfunction: P2227:00, P2228:00, P2229:00
―  CKP sensor or related circuit malfunction: P0336:00, P0337:00
Drive cycle
•  2
Self test type
•  CMDTC self test
Sensor used
•  CKP sensor
•  ABS wheel speed sensor
•  DSC HU/CM
•  APP sensor
•  ECT sensor
•  IAT sensor No.1
•  Fuel pressure sensor
FAIL-SAFE FUNCTION
•  Not applicable
VEHICLE STATUS WHEN DTCs ARE OUTPUT
•  Check engine light is illuminated
POSSIBLE CAUSE
•  Erratic signal to PCM
―  ECT sensor signal malfunction
―  IAT sensor No.1 signal malfunction
―  CKP sensor signal malfunction
―  APP sensor signal malfunction
―  VSS signal malfunction
―  Fuel pressure sensor malfunction
―  Input signal part connector or terminals malfunction
―  Input signal part related circuit malfunction
•  CKP sensor malfunction
•  Fuel injector No.1 malfunction
•  Mechanical (engine) malfunction
―  Insufficient engine compression
―  Engine coolant leakage to combustion chamber
•  Poor fuel quality
•  PCM malfunction


System Wiring Diagram

•  Not applicable

Function Explanation (DTC Detection Outline)

•  The PCM performs diagnosis of the fuel injector amounts by comparing the engine torque fluctuation occurring at the engine stroke between each cylinder.
•  The PCM calculates the engine torque fluctuation by the change in the angular speed of the crankshaft from TDC to BDC of the expansion stroke of each cylinder.
•  When the monitoring conditions are met, the PCM compares the engine torque fluctuation between each cylinder and the torque fluctuation (crankshaft angular speed) of No cylinder No. 1 is higher than the specified value, it determines that the injection amount of fuel injector No. 1 has increased.
•  The PCM performs diagnosis when each of the preconditions during drive cycle is met. If a malfunction is detected, the malfunction detection counter begins counting up. The value of the malfunction detection counter is maintained while the preconditions are not being met. If the cumulative value of the malfunction detection counter exceeds the threshold during the first drive cycle, a malfunction is determined and a pending code is stored.
•  If the PCM determines that the malfunction recurs from the next drive cycle and thereafter, it stores a DTC and turns on the check engine light.

Repeatability Verification Procedure

Caution
•  When the M-MDS is used to observe monitor system status while driving, be sure to have another technician with you, or record the data in the M-MDS using the PID/DATA MONITOR AND RECORD capturing function and inspect later.
•  While performing this step, always operate the vehicle in a safe and lawful manner.
1.  Start the engine and warm it up until the engine coolant temperature is 40 °C {104 °F} or more.
2.  Accelerate to 40 km/h {25 mph}.
3.  Release the clutch while staying in gear and decelerate (MTX). Decelerate without shifting from the D position to another position (ATX).
4.  Continue to maintain the engine speed at 850 rpm or less for a cumulative 10 s or more at a speed of 2 km/h {2 mph} or more during deceleration.

PID Item/Simulation Item Used In Diagnosis

PID/DATA monitor item table

Item

Definition

Unit

Condition/Specification
APP1
APP sensor No.1 voltage
V
Switch ignition ON (engine off)
•  Accelerator pedal released: Approx. 0.76 V
•  Accelerator pedal depressed: Approx. 4.54 V
APP2
APP sensor No.2 voltage
V
Switch ignition ON (engine off)
•  Accelerator pedal released: Approx. 0.38 V
•  Accelerator pedal depressed: Approx. 2.27 V
ECT
Engine coolant temperature
°C, °F
•  Displays ECT
FRP
Common rail pressure
kPa, Bar, psi
•  Idle: Approx. 40 MPa {408 kgf/cm2, 5,802 psi}
•  Racing (engine speed above 4,000 rpm): Approx. 89 MPa {908 kgf/cm2, 12,908 psi}
IAT
Intake air temperature (No.1)
°C, °F
•  Displays the intake air temperature (No.1)
VSS
Vehicle speed
KPH, MPH
•  Displays the vehicle speed
WSPD_SEN_LF
LF ABS wheel speed sensor
KPH, MPH
•  This PID indicates vehicle speed.
WSPD_SEN_LR
LR ABS wheel speed sensor
KPH, MPH
•  This PID indicates vehicle speed.
WSPD_SEN_RF
RF ABS wheel speed sensor
KPH, MPH
•  This PID indicates vehicle speed.
WSPD_SEN_RR
RR ABS wheel speed sensor
KPH, MPH
•  This PID indicates vehicle speed.

Function Inspection Using M-MDS

STEP

INSPECTION

ACTION
1
PURPOSE: RECORD VEHICLE STATUS AT TIME OF DTC DETECTION TO UTILIZE WITH REPEATABILITY VERIFICATION
Note
•  Recording can be facilitated using the screen capture function of the PC.
•  Record the FREEZE FRAME DATA/snapshot data on the repair order.
—
Go to the next step.
2
PURPOSE: VERIFY RELATED SERVICE INFORMATION AVAILABILITY
•  Verify related Service Information availability.
•  Is any related Service Information available?
Yes
Perform repair or diagnosis according to the available Service Information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
PURPOSE: IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA
•  Is the DTC P1052:00 on FREEZE FRAME DATA?
Yes
Go to the next step.
No
Go to the troubleshooting procedure for DTC on FREEZE FRAME DATA.
(See DTC TABLE [SKYACTIV-D 1.5].)
4
PURPOSE: VERIFY IF DIAGNOSTIC RESULT IS AFFECTED BY OTHER RELATED DTCs OCCURRING
•  Switch the ignition off, then ON (engine off).
•  Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure.
•  Is the other PENDING CODE/DTC also present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [SKYACTIV-D 1.5].)
No
Go to the next step.
5
PURPOSE: VERIFY IF THERE IS PID ITEM CAUSING DRASTIC CHANGES OF ACCELERATION FLUCTUATION BY INPUT SIGNAL TO PCM AND DSC HU/CM
•  Access the following PIDs using the M-MDS:
PCM:
―  APP1
―  APP2
―  IAT
―  ECT
DSC:
―  WSPD_SEN_LF
―  WSPD_SEN_LR
―  WSPD_SEN_RF
―  WSPD_SEN_RR
•  Is there any signal that is far out of specification?
Yes
Inspect the suspected sensor and related wiring harness.
•  If there is any malfunction:
―  Repair or replace the malfunctioning part.
―  Go to the troubleshooting procedure to perform the procedure from Step 4.
•  If there is no malfunction:
―  Go to the next step.
No
Go to the next step.
6
PURPOSE: VERIFY CONNECTOR CONNECTIONS
•  Access the following PIDs using the M-MDS:
PCM:
―  APP1
―  APP2
―  IAT
―  ECT
DSC:
―  WSPD_SEN_LF
―  WSPD_SEN_LR
―  WSPD_SEN_RF
―  WSPD_SEN_RR
•  When the following parts are shaken, does the PID value include a PID item which has changed?
―  APP sensor
―  IAT sensor No.1
―  ECT sensor
―  LF ABS wheel speed sensor
―  LR ABS wheel speed sensor
―  RF ABS wheel speed sensor
―  RR ABS wheel speed sensor
―  PCM
―  DSC HU/CM
Yes
Repair or replace the applicable connector parts.
Go to the troubleshooting procedure to perform the procedure from Step 4.
No
Go to the troubleshooting procedure to perform the procedure from Step 1.


Troubleshooting Diagnostic Procedure

Intention of troubleshooting procedure
•  Step 1—2
―  Perform inspection of each separate part.
•  Step 3
―  Perform inspection of engine.
•  Step 4—5
―  Verify that the primary malfunction is resolved and there are no other malfunctions.

STEP

INSPECTION

ACTION
1
PURPOSE: INSPECT CKP SENSOR
•  Inspect the CKP sensor.
•  Is there any malfunction?
Yes
Replace the CKP sensor, then go to Step 4.
(See CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)
No
Go to the next step.
2
PURPOSE: INSPECT FUEL INJECTOR NO.1
•  Inspect the fuel injector No.1.
•  Is there any malfunction?
Yes
Replace the fuel injector No.1, then go to Step 4.
(See FUEL INJECTOR REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)
No
Go to the next step.
3
PURPOSE: INSPECT FOR MALFUNCTION DUE TO ENGINE
•  Inspect the engine for followings:
―  Engine compression
―  Engine coolant leakage
•  Is there any malfunction?
Yes
Repair or replace the malfunctioning part according to the inspection results, then go to the next step.
No
A malfunction caused by the use of inferior fuel can be considered.
Replace the fuel, then go to the next step.
(See FUEL DRAINING PROCEDURE [SKYACTIV-D 1.5].)
4
PURPOSE: PERFORM DTC INSPECTION AND VERIFY IF MALFUNCTIONING PART IS PCM
•  Always reconnect all disconnected connectors.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Implement the repeatability verification procedure.
•  Perform the Pending Trouble Code Access Procedure.
•  Is the PENDING CODE for this DTC present?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the PCM.
Go to the next step.
No
Go to the next step.
5
PURPOSE: VERIFY AFTER REPAIR PROCEDURE
•  Perform the “AFTER REPAIR PROCEDURE”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [SKYACTIV-D 1.5].)
No
DTC troubleshooting completed.