NO.19 EXHAUST SMOKE [MZR 2.0 DISI]

id0103d5802500

19

EXHAUST SMOKE
DESCRIPTION
•  Blue, black, or white smoke from exhaust system.
POSSIBLE CAUSE
Blue smoke (Burning oil):
•  PCV valve malfunction
•  Engine internal oil leakage
White smoke (Water in combustion):
•  Cooling system malfunction (coolant loss)
•  Engine internal coolant leakage
Black smoke (Rich fuel mixture):
•  Air cleaner restriction
•  Intake-air system is collapsed or restricted
•  Leakage at engine intake or exhaust manifold
•  Excessive fuel pressure
•  Erratic signal to PCM
―  APP sensor or related circuit malfunction
―  ECT sensor or related circuit malfunction
―  IAT sensor or related circuit malfunction
―  MAF sensor or related circuit malfunction
―  MAP sensor or related circuit malfunction
―  A/F sensor or related circuit malfunction
―  HO2S or related circuit malfunction
―  TP sensor or related circuit malfunction
•  Inadequate fuel pressure
―  Fuel pressure sensor or related circuit malfunction
―  High pressure fuel pump malfunction
―  Spill valve control solenoid valve control circuit malfunction (damage to driver in PCM caused by short circuit to ground system)
―  Spill valve control solenoid valve (built-in high pressure fuel pump) malfunction
―  Relief valve (built-in fuel delivery pipe) malfunction
•  Ignition system malfunction
•  Improper fuel injection timing and amount
•  Improper engine compression
•  Improper valve timing
•  Injector driver (built-in PCM) malfunction
Warning
The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services:
•  Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel.
•  Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injury or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete “BEFORE SERVICE PRECAUTION” and “AFTER SERVICE PRECAUTION” described in this manual. (See BEFORE SERVICE PRECAUTION [MZR 2.0 DISI].) (See AFTER SERVICE PRECAUTION [MZR 2.0 DISI].)
Caution
•  Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to the fuel pipe and quick release connector. Always clean the quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material.

Diagnostic procedure

STEP

INSPECTION

RESULTS

ACTION
1
What color is smoke coming from the exhaust system?
Blue
Burning oil is indicated.
•  Go to the next step.
White
Water in combustion is indicated.
•  Go to Step 4.
Black
Rich fuel mixture is indicating.
•  Go to Step 5.
2
Inspect the PCV valve.
(See POSITIVE CRANKCASE VENTILATION (PCV) VALVE INSPECTION [MZR 2.0 DISI].)
Is there any malfunction?
Yes
Replace the PCV valve.
(See POSITIVE CRANKCASE VENTILATION (PCV) VALVE REMOVAL/INSTALLATION [MZR 2.0 DISI].)
No
Go to the next step.
3
Inspect for the following engine internal parts:
•  Damaged valve guide, stems or valve seals
•  Blocked oil drain passage in cylinder head
•  Piston ring is not seated, seized or worn
•  Damage cylinder bore
Is there any malfunction?
Yes
Repair or replace the malfunctioning part according to the inspection results.
No
Engine internal parts are normal.
•  If other driveability symptoms are present:
―  Return to the diagnostic index to service additional symptoms.
4
Does the cooling system hold the coolant pressure?
(See ENGINE COOLANT LEAKAGE INSPECTION [MZR 2.0 DISI].)
Yes
Inspect for the following:
•  Cylinder head gasket leakage
•  Intake manifold gasket leakage
•  Cracked or porous engine block
Repair or replace the malfunctioning parts according to the inspection results.
•  If other driveability symptoms are present:
―  Return to the diagnostic index to service additional symptoms.
No
Inspect for the cause.
Repair or replace the malfunctioning part according to the inspection results.
5
Inspect the following for intake-air system:
•  Air cleaner restriction
•  Collapsed or restricted
•  Leakage
Is there any malfunction?
Yes
Repair or replace the malfunctioning part according to the inspection results.
No
Go to the next step.
6
Access the following PIDs using the M-MDS:
(See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI].)
•  APP
•  ECT
•  IAT
•  LONGFT1
•  MAF
•  MAP
•  O2S11
•  O2S12
•  SHTFT1
•  TP
•  VSS
Monitor the PIDs under the black smoke appeared engine condition.
Do the PIDs indicate normal according to engine conditions?
(See PCM INSPECTION [MZR 2.0 DISI].)
Yes
Go to the next step.
No
Repair or replace the malfunctioning part according to the inspection results.
•  If the malfunction remains:
―  Perform the “INTERMITTENT CONCERN TROUBLESHOOTING” procedure.
7
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.
Access the same PIDs as Step 6 using the M-MDS under the trouble condition.
(See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI].)
Do the PIDs indicate the correct values under the trouble condition?
(See PCM INSPECTION [MZR 2.0 DISI].)
Yes
Go to the next step.
No
Repair or replace the malfunctioning part according to the inspection results.
•  If the malfunction remains:
―  Perform the “INTERMITTENT CONCERN TROUBLESHOOTING” procedure.
8
Access the FUEL_PRES PID using the M-MDS.
(See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI].)
Is the FUEL_PRES PID value within the specification?
(See PCM INSPECTION [MZR 2.0 DISI].)
Yes
Go to Step 13.
No
Go to the next step.
9
Is the vehicle accelerate performance normally?
Yes
Go to the next step.
No
Go to Step 11.
10
Inspect the fuel pressure sensor.
(See FUEL PRESSURE SENSOR INSPECTION [MZR 2.0 DISI].)
Is there any malfunction?
Yes
Replace the fuel delivery pipe.
(See FUEL INJECTOR REMOVAL/INSTALLATION [MZR 2.0 DISI].)
No
Go to Step 13.
11
Switch the ignition to off.
Disconnect the high pressure fuel pump and PCM connectors.
Inspect for continuity between high pressure fuel pump terminal A (wiring harness-side) and body ground.
Is there continuity?
Yes
Repair or replace the wiring harness for a possible short to ground.
•  If the malfunction remains:
―  Replace the PCM. (damage to driver in PCM)
No
Go to the next step.
12
Replace the high pressure fuel pump.
(See HIGH PRESSURE FUEL PUMP REMOVAL/INSTALLATION [MZR 2.0 DISI].)
Access the FUEL_PRES PID using the M-MDS.
(See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI].)
Is the FUEL_PRES PID value within the specification?
(See PCM INSPECTION [MZR 2.0 DISI].)
Yes
High pressure fuel pump or spill valve control solenoid valve (built-in high pressure fuel pump) malfunction.
•  Symptom troubleshooting is completed.
•  Go to Step 16.
No
Relief valve (built-in fuel delivery pipe) malfunction.
•  Replace the fuel delivery pipe.
13
Perform the Spark Test.
(See ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZR 2.0 DISI].)
Is a strong blue spark visible at each cylinder?
Yes
Go to the next step.
No
Repair or replace the malfunctioning part according to the inspection results.
14
Perform the Fuel Injector Operation Inspection.
(See ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZR 2.0 DISI].)
Do the fuel injectors operate properly?
Yes
Go to the next step.
No
Repair or replace the malfunctioning part according to the inspection results.
15
Measure the compression pressure for each cylinder.
(See COMPRESSION INSPECTION [MZR 2.0 DISI].)
Are the compression pressures within the specification?
Yes
Injector driver is malfunction.
•  Replace the PCM.
If the malfunction remains:
•  Overhaul the engine.
No
Inspect for following:
•  Damaged valve seat
•  Worn valve stem and valve guide
•  Worn or stuck piston ring
•  Worn piston, piston ring or cylinder
•  Improper valve timing
Service if necessary.
16
Verify the test results.
•  If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [MZR 2.0 DISI].)
•  If a malfunction remains, inspect the related Service Information and perform the repair or diagnosis.
―  If the vehicle is repaired, troubleshooting is completed.
―  If the vehicle is not repaired or additional diagnostic information is not available, replace the PCM. (See PCM REMOVAL/INSTALLATION [MZR 2.0 DISI].)