DTC P02CB:00 [SKYACTIV-D 2.2]

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Note

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

Details On DTCs

DESCRIPTION

Large-type turbocharger underboost condition

DETECTION CONDITION

Determination conditions

•  As the result of comparing the actual air charging pressure with the target air charging pressure, the actual air charging pressure is lower or more than specified value compared to the target air charging pressure for a continuous 7 s.

Preconditions

•  2 s have elapsed with all of the following conditions met when DPF regeneration control is stopped during boost control feedback:

―  Fuel injection amount: 25 mm³/stoke or more

―  Engine speed: 1,750—5,000 rpm (MTX)

―  Engine speed: 1,900—5,000 rpm (ATX)

―  Battery voltage: 8 V or more

―  Time from engine start: 15 s or more

Drive cycle

•  2

Self test type

•  CMDTC self test

Sensor used

•  MAP sensor No.2

FAIL-SAFE FUNCTION

•  Not applicable

VEHICLE STATUS WHEN DTCs ARE OUTPUT

•  Check engine light is illuminated

POSSIBLE CAUSE

•  Erratic signal to PCM

―  MAP sensor No.2 signal malfunction

―  Input signal part connector or terminals malfunction

―  Input signal part related circuit malfunction

•  Bonnet insulator incorrect installation (intake air of engine is blocked due to improper positioning of bonnet insulator)

•  Air cleaner element clogging or dirt

•  Exhaust gas leakage from exhaust system

•  Air suction in intake air system

•  Vacuum piping or positive pressure piping of wastegate valve malfunction

•  Vacuum piping or positive pressure piping of compressor bypass valve malfunction

•  Wastegate solenoid valve malfunction

•  Compressor bypass solenoid valve malfunction

•  Turbocharger malfunction (large turbine, large compressor)

•  PCM malfunction

DESCRIPTION	Large-type turbocharger underboost condition
DETECTION CONDITION	Determination conditions	• As the result of comparing the actual air charging pressure with the target air charging pressure, the actual air charging pressure is lower or more than specified value compared to the target air charging pressure for a continuous 7 s.
Preconditions	• 2 s have elapsed with all of the following conditions met when DPF regeneration control is stopped during boost control feedback: ― Fuel injection amount: 25 mm³/stoke or more ― Engine speed: 1,750—5,000 rpm (MTX) ― Engine speed: 1,900—5,000 rpm (ATX) ― Battery voltage: 8 V or more ― Time from engine start: 15 s or more
Drive cycle	• 2
Self test type	• CMDTC self test
Sensor used	• MAP sensor No.2
FAIL-SAFE FUNCTION	• Not applicable
VEHICLE STATUS WHEN DTCs ARE OUTPUT	• Check engine light is illuminated
POSSIBLE CAUSE	• Erratic signal to PCM ― MAP sensor No.2 signal malfunction ― Input signal part connector or terminals malfunction ― Input signal part related circuit malfunction • Bonnet insulator incorrect installation (intake air of engine is blocked due to improper positioning of bonnet insulator) • Air cleaner element clogging or dirt • Exhaust gas leakage from exhaust system • Air suction in intake air system • Vacuum piping or positive pressure piping of wastegate valve malfunction • Vacuum piping or positive pressure piping of compressor bypass valve malfunction • Wastegate solenoid valve malfunction • Compressor bypass solenoid valve malfunction • Turbocharger malfunction (large turbine, large compressor) • PCM malfunction

System Wiring Diagram

• Not applicable

Function Explanation (DTC Detection Outline)

• The PCM diagnoses the large-type turbo system performance by comparing the target air charging pressure with the actual.

• The PCM uses the manifold absolute pressure sensor to monitor the intake manifold pressure during boost control as the actual air charging pressure.

• When the monitoring conditions are met during boost control, the PCM compares the target air charging pressure with the actual. If the actual air charging pressure is lower than the specification for the target air charging pressure, the PCM determines an inadequate air charging malfunction.

• 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.

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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. Access the following PIDs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 2.2].)

― MAP_DSD

― MAP

― REGVP_DSD

2. Start the engine and warm it up completely.

3. Accelerate for 20 s with all of the following conditions met:

― Gear position: 2nd

― Engine speed: 2,000—4,500 rpm

4. Verify the difference between the target air charging pressure and the actual air charging pressure while the target value (PID: REGVP_DSD) of the regulating valve position is less than 5 mm {0.2 in}, and verify that the pressure difference of 30 kPa {0.31 kgf/cm², 4.4 psi} or more does not continue for 3 s.

PID Item/Simulation Item Used In Diagnosis

PID/DATA monitor item table

Item	Definition	Unit	Condition/Specification
MAP_DSD	Manifold absolute pressure desired value	KPa {MPa}, mBar {Bar}, psi, in H20	• Displays the boost air pressure desired value
MAP	Manifold absolute pressure	KPa {MPa}, mBar {Bar}, psi, in H20	• Switch ignition ON (engine off): Approx. 100 kPa {1 bar, 14.5 psi} • Idle: Approx. 80 kPa {0.8 bar, 12 psi}
REGVP_DSD	Regulating valve position desired value	mm {in}	• Displays the distance since last diesel particulate filter regeneration.

Function Inspection Using M-MDS

STEP	INSPECTION		ACTION
1	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.
1		No	Go to the next step.
2	PURPOSE: IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA • Is the DTC P02CB:00 on FREEZE FRAME DATA?	Yes	Go to the next step.
2		No	Go to the troubleshooting procedure for DTC on FREEZE FRAME DATA. (See DTC TABLE [SKYACTIV-D 2.2].)
3	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.
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. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 2.2].) • Is the other PENDING CODE/DTC also present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [SKYACTIV-D 2.2].)
4		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 • Access the following PIDs using the M-MDS: (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 2.2].) ― MAP_DSD ― MAP • Is there any signal that is far out of specification?	Yes	Go to the next step.
5		No	Go to the troubleshooting procedure to perform the procedure from Step 1.
6	PURPOSE: VERIFY CONNECTOR CONNECTIONS • Access the following PIDs using the M-MDS: (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 2.2].) ― MAP_DSD ― MAP • When the following parts are shaken, does the PID value include a PID item which has changed? ― MAP sensor No.2 ― PCM	Yes	Inspect the related wiring harness and connector. • Repair or replace the malfunctioning part. Go to the troubleshooting procedure to perform the procedure from Step 8.
6		No	Go to the troubleshooting procedure to perform the procedure from Step 1.

Troubleshooting Diagnostic Procedure

Intention of troubleshooting procedure

• Step 1—6

― Perform inspection of piping and hoses in intake air system and exhaust system.

• Step 7—9

― Perform inspection of each separate part.

• Step 10—11

― Verify that the primary malfunction is resolved and there are no other malfunctions.

STEP

INSPECTION

ACTION

1

PURPOSE: VERIFY BONNET INSULATOR INSTALLATION CONDITION

•  Verify the bonnet insulator installation condition.

•  Is there looseness in the installation?

Yes

Repair the bonnet insulator installation, then go to Step 10.

(Intake air of engine is blocked due to improper positioning of bonnet insulator.)

(See BONNET DISASSEMBLY/ASSEMBLY.)

No

Repair or replace the malfunctioning location, then go to Step 10.

2

PURPOSE: INSPECT AIR CLEANER ELEMENT CONDITION

•  Visually inspect the air cleaner element.

•  Is there any clogging or dirt?

Yes

Clean or replace the air cleaner element, then go to Step 10.

No

Go to the next step.

3

PURPOSE: INSPECT EXHAUST SYSTEM FOR LEAKAGE

•  Visually inspect for exhaust gas leakage from the exhaust system.

•  Is there any malfunction?

Yes

Repair or replace the malfunctioning part according to the inspection results, then go to Step 10.

No

Go to the next step.

4

PURPOSE: INSPECT INTAKE AIR SYSTEM FOR AIR SUCTION

•  Inspect for air leakage at the following:

―  Around connection of turbocharger and intake manifold

Note

•  Engine speed may change when rust penetrating agent is sprayed on the air suction area.

•  Is there any malfunction?

Yes

Repair or replace the malfunctioning part according to the inspection results, then go to Step 10.

No

Go to the next step.

5

PURPOSE: INSPECT VACUUM PIPING AND POSITIVE PRESSURE PIPING OF WASTEGATE VALVE

•  Inspect vacuum piping and positive pressure piping of wastegate valve.
(See TURBOCHARGER REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)

•  Is there hose leakage or damage in the vacuum piping and positive pressure piping?

Yes

Repair or replace the malfunctioning part according to the inspection results, then go to Step 10.

No

Go to the next step.

6

PURPOSE: INSPECT VACUUM PIPING AND POSITIVE PRESSURE PIPING OF COMPRESSOR BYPASS VALVE

•  Inspect vacuum piping and positive pressure piping of compressor bypass valve.
(See TURBOCHARGER REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)

•  Is there hose leakage or damage in the vacuum piping and positive pressure piping?

Yes

Repair or replace the malfunctioning part according to the inspection results, then go to Step 10.

No

Go to the next step.

7

PURPOSE: INSPECT WASTEGATE SOLENOID VALVE

•  Inspect the wastegate solenoid valve.
(See WASTEGATE SOLENOID VALVE INSPECTION [SKYACTIV-D 2.2].)

•  Is there any malfunction?

Yes

Replace the wastegate solenoid valve, then go to Step 8.

(See WASTEGATE SOLENOID VALVE REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)

No

Go to the next step.

8

PURPOSE: INSPECT COMPRESSOR BYPASS SOLENOID VALVE

•  Inspect the compressor bypass solenoid valve.
(See COMPRESSOR BYPASS SOLENOID VALVE INSPECTION [SKYACTIV-D 2.2].)

•  Is there any malfunction?

Yes

Replace the compressor bypass solenoid valve, then go to Step 10.

(See COMPRESSOR BYPASS SOLENOID VALVE REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)

No

Go to the next step.

9

PURPOSE: INSPECT TURBOCHARGER

•  Inspect the turbocharger.
(See TURBOCHARGER INSPECTION [SKYACTIV-D 2.2].)

•  Is there any malfunction?

Yes

Replace the turbocharger, then go to the next step.

(See TURBOCHARGER REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)

No

Go to the next step.

10

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.
(See CLEARING DTC [SKYACTIV-D 2.2].)

•  Implement the repeatability verification procedure.
(See Repeatability Verification Procedure.)

•  Perform the Pending Trouble Code Access Procedure.
(See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 2.2].)

•  Is the PENDING CODE for this DTC present?

Yes

Repeat the inspection from Step 1.

•  If the malfunction recurs, replace the PCM.
(See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)

Go to the next step.

No

Go to the next step.

11

PURPOSE: VERIFY AFTER REPAIR PROCEDURE

•  Perform the “AFTER REPAIR PROCEDURE”.
(See AFTER REPAIR PROCEDURE [SKYACTIV-D 2.2].)

•  Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [SKYACTIV-D 2.2].)

No

DTC troubleshooting completed.

STEP	INSPECTION		ACTION
1	PURPOSE: VERIFY BONNET INSULATOR INSTALLATION CONDITION • Verify the bonnet insulator installation condition. • Is there looseness in the installation?	Yes	Repair the bonnet insulator installation, then go to Step 10. (Intake air of engine is blocked due to improper positioning of bonnet insulator.) (See BONNET DISASSEMBLY/ASSEMBLY.)
1		No	Repair or replace the malfunctioning location, then go to Step 10.
2	PURPOSE: INSPECT AIR CLEANER ELEMENT CONDITION • Visually inspect the air cleaner element. • Is there any clogging or dirt?	Yes	Clean or replace the air cleaner element, then go to Step 10.
2		No	Go to the next step.
3	PURPOSE: INSPECT EXHAUST SYSTEM FOR LEAKAGE • Visually inspect for exhaust gas leakage from the exhaust system. • Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to Step 10.
3		No	Go to the next step.
4	PURPOSE: INSPECT INTAKE AIR SYSTEM FOR AIR SUCTION • Inspect for air leakage at the following: ― Around connection of turbocharger and intake manifold Note • Engine speed may change when rust penetrating agent is sprayed on the air suction area. • Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to Step 10.
4		No	Go to the next step.
5	PURPOSE: INSPECT VACUUM PIPING AND POSITIVE PRESSURE PIPING OF WASTEGATE VALVE • Inspect vacuum piping and positive pressure piping of wastegate valve. (See TURBOCHARGER REMOVAL/INSTALLATION [SKYACTIV-D 2.2].) • Is there hose leakage or damage in the vacuum piping and positive pressure piping?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to Step 10.
5		No	Go to the next step.
6	PURPOSE: INSPECT VACUUM PIPING AND POSITIVE PRESSURE PIPING OF COMPRESSOR BYPASS VALVE • Inspect vacuum piping and positive pressure piping of compressor bypass valve. (See TURBOCHARGER REMOVAL/INSTALLATION [SKYACTIV-D 2.2].) • Is there hose leakage or damage in the vacuum piping and positive pressure piping?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to Step 10.
6		No	Go to the next step.
7	PURPOSE: INSPECT WASTEGATE SOLENOID VALVE • Inspect the wastegate solenoid valve. (See WASTEGATE SOLENOID VALVE INSPECTION [SKYACTIV-D 2.2].) • Is there any malfunction?	Yes	Replace the wastegate solenoid valve, then go to Step 8. (See WASTEGATE SOLENOID VALVE REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
7		No	Go to the next step.
8	PURPOSE: INSPECT COMPRESSOR BYPASS SOLENOID VALVE • Inspect the compressor bypass solenoid valve. (See COMPRESSOR BYPASS SOLENOID VALVE INSPECTION [SKYACTIV-D 2.2].) • Is there any malfunction?	Yes	Replace the compressor bypass solenoid valve, then go to Step 10. (See COMPRESSOR BYPASS SOLENOID VALVE REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
8		No	Go to the next step.
9	PURPOSE: INSPECT TURBOCHARGER • Inspect the turbocharger. (See TURBOCHARGER INSPECTION [SKYACTIV-D 2.2].) • Is there any malfunction?	Yes	Replace the turbocharger, then go to the next step. (See TURBOCHARGER REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
9		No	Go to the next step.
10	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. (See CLEARING DTC [SKYACTIV-D 2.2].) • Implement the repeatability verification procedure. (See Repeatability Verification Procedure.) • Perform the Pending Trouble Code Access Procedure. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 2.2].) • Is the PENDING CODE for this DTC present?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].) Go to the next step.
10		No	Go to the next step.
11	PURPOSE: VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [SKYACTIV-D 2.2].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [SKYACTIV-D 2.2].)
11		No	DTC troubleshooting completed.