DTC P1142:00 [SKYACTIV-D 1.5]

id0102q2885000

DTC P1142:00

Fuel restriction condition
DETECTION CONDITION
Note
•  The PCM controls the fuel injection amount so that the rotation of the turbocharger with variable turbine geometry does not reach the excess speed range.
When the following detection conditions are met, the PCM suppresses the exhaust gas amount by decreasing the fuel injection amount to inhibit the turbocharger with variable turbine geometry from operating at excess speed. The PCM stores P1142:00 as a record indicating that the output restriction has been performed.
•  Any one of the following conditions is met:
―  Value of exhaust gas pressure sensor No. 1 is specified value or more*1
―  Turbocharger with variable turbine geometry operated in excessive speed
―  Turbocharger with variable turbine geometry overboost condition*1
*1: The conditions vary according to the engine speed and the operation condition of the turbocharger with variable turbine geometry.
FAIL-SAFE FUNCTION
•  Fuel injection amount is decreased.
POSSIBLE CAUSE
•  Vacuum piping malfunction
―  Power brake unit—Vacuum pump
―  Vacuum pump—Check valve
―  Check valve—Vacuum chamber
―  Vacuum chamber—Turbocharger solenoid valve
―  Turbocharger solenoid valve—Turbocharger actuator
•  Fuel injector No.1 malfunction
•  Fuel injector No.2 malfunction
•  Fuel injector No.3 malfunction
•  Fuel injector No.4 malfunction
•  Turbocharger with variable turbine geometry malfunction
•  Actuator position sensor malfunction
•  Turbocharger solenoid valve malfunction
•  Exhaust gas pressure sensor No.1 malfunction
•  MAP sensor malfunction
•  Vacuum chamber (built-into cylinder head cover) malfunction
•  Check valve malfunction
•  PCM malfunction
SYSTEM WIRING DIAGRAM
Not applicable

Diagnostic Procedure

STEP

INSPECTION

ACTION
1
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
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
VERIFY RELATED PENDING CODE AND/OR DTC
•  Switch the ignition off, then ON (engine off).
•  Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure.
•  Are any other PENDING CODEs and/or DTCs present?
Yes
If DTC P2104:00, P2106:00 or P2263:00 is stored:
•  Go to the next step.
If DTC other than P2104:00, P2106:00 or P2263:00 is stored:
•  Go to the applicable PENDING CODE or DTC inspection.
No
Go to the next step.
4
DETERMINE IF MALFUNCTION IS CAUSED BY TURBOCHARGER WITH VARIABLE TURBINE GEOMETRY
•  Switch the ignition off.
•  Switch the ignition ON (engine on).
•  Display PID VGTURB_ACT and simulation item VGTURB_DSD using the M-MDS.
•  Operate the turbocharger with variable geometry using simulation item VGTURB_DSD.
•  Does PID VGTURB_ACT change according to the simulation operation?
Yes
Go to Step 12.
No
Go to the next step.
5
INSPECT VACUUM PIPING
•  Inspect vacuum piping at the following:
―  Power brake unit—Vacuum pump
―  Vacuum pump—Check valve
―  Check valve—Vacuum chamber
―  Vacuum chamber—Turbocharger solenoid valve
―  Turbocharger solenoid valve—Turbocharger actuator
•  Is there hose leakage or damage in the vacuum piping?
Yes
Repair or replace the malfunctioning part according to the inspection results, then go to Step 9.
No
Go to the next step.
6
INSPECT VACUUM CHAMBER
•  Inspect the vacuum chamber.
•  Is there any malfunction?
Yes
Replace the cylinder head cover, then go to Step 9.
(See TIMING CHAIN REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)
No
Go to the next step.
7
INSPECT TURBOCHARGER SOLENOID VALVE
•  Inspect the turbocharger solenoid valve.
•  Is there any malfunction?
Yes
Replace the turbocharger solenoid valve, then go to Step 9.
(See TURBOCHARGER SOLENOID VALVE REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)
No
Go to the next step.
8
INSPECT CHECK VALVE
•  Inspect the check valve.
•  Is there any malfunction?
Yes
Replace the check valve, then go to the next step.
(See CHECK VALVE REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)
No
Replace the turbocharger with variable turbine geometry, then go to Step 12.
(See TURBOCHARGER WITH VARIABLE TURBINE GEOMETRY REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)
9
DETERMINE IF MALFUNCTION IS CAUSED BY TURBOCHARGER WITH VARIABLE TURBINE GEOMETRY
•  Switch the ignition off.
•  Switch the ignition ON (engine on).
•  Display PID VGTURB_ACT and simulation item VGTURB_DSD using the M-MDS.
•  Operate the turbocharger with variable geometry using simulation item VGTURB_DSD.
•  Does PID VGTURB_ACT change according to the simulation operation?
Yes
Go to the next step.
No
Replace the turbocharger with variable turbine geometry, then go to the next step.
(See TURBOCHARGER WITH VARIABLE TURBINE GEOMETRY REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)
10
INSPECT MAP SENSOR
•  Reconnect all disconnected connectors.
•  Inspect the MAP sensor.
•  Is there any malfunction?
Yes
Replace the MAP sensor/boost air temperature sensor, then go to the next step.
(See MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR/BOOST AIR TEMPERATURE SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)
No
Go to the next step.
11
INSPECT EXHAUST GAS PRESSURE SENSOR NO.1
•  Reconnect all disconnected connectors.
•  Inspect the exhaust gas pressure sensor No.1.
•  Is there any malfunction?
Yes
Replace the exhaust gas pressure sensor No.1, then go to the next step.
(See EXHAUST GAS PRESSURE SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)
No
Go to the next step.
12
PERFORM COMPULSORY DPF REGENERATION AND BURN OUT ENGINE OIL IN DPF
•  Perform the “COMPULSORY DIESEL PARTICULATE FILTER REGENERATION”.
Note
•  When a DTC is stored, compulsory DPF regeneration may be performed by the PCM control.
―  For DTCs P242F:00, the "COMPULSORY DIESEL PARTICULATE FILTER REGENERATION" will only be blocked if an excessive amount of soot is in the diesel particulate filter.
•  Compulsory DPF regeneration is performed after performing the applicable DTC troubleshooting.
—
Go to the next step.
13
INSPECT ENGINE OIL LEVEL
•  Inspect the engine oil level.
•  Is the engine oil amount above X line on the dipstick?
Yes
Replace the engine oil.
(See ENGINE OIL REPLACEMENT [SKYACTIV-D 1.5].)
Perform the “ENGINE OIL DATA RESET”.
(See ENGINE OIL DATA RESET [SKYACTIV-D 1.5].)
Go to the next step.
No
Go to the next step.
14
VERIFY DTC TROUBLESHOOTING COMPLETED
•  Always reconnect all disconnected connectors.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Perform the “FUEL INJECTOR INJECTION AMOUNT CORRECTION”.
•  Start the engine and warm it up completely.
Caution
•  While performing this step, always operate the vehicle in a safe and lawful manner.
•  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.
•  Drive the vehicle under the FREEZE FRAME DATA/snapshot data condition.
•  Perform the DTC Reading Procedure.
•  Is the same 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.
15
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
Referring to each adjustment procedure, perform fuel injector injection amount correction and then the diesel particulate filter data reset.
(See FUEL INJECTOR INJECTION AMOUNT CORRECTION [SKYACTIV-D 1.5].)
(See COMPULSORY DIESEL PARTICULATE FILTER REGENERATION [SKYACTIV-D 1.5].)
DTC troubleshooting completed.