NO.14 EXHAUST SMOKE [MZ-CD 1.6]
id0103e8854700
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Exhaust smoke |
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DESCRIPTION
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• Black smoke at cruising speeds.
• Black smoke at cruising speeds and glow indicator light is flashing.
• Black smoke at idle.
• Black smoke at idle and glow indicator light is flashing.
• Excessive black smoke during acceleration.
• Blue smoke.
• Blue smoke and glow indicator light is flashing.
• White smoke.
• White smoke and glow indicator light is flashing.
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POSSIBLE CAUSE
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Black smoke:
• PCM DTC is detected.
• Air cleaner element restriction
• Loose vacuum line(s)/vacuum connections
• Loose intake-air system hose(s)/hose connections
• Loose intake-air system tube(s)/tube connections
• Fuel leakage
• Visibly damaged or worn parts
• Loose or missing nuts or bolts
• Incorrect or contaminated fuel in fuel tank
• EGR valve incorrect base setting
• Erratic signal to PCM
• CKP sensor or pulse wheel malfunction
• Fuel injector malfunction
• EGR valve incorrect operation.
• Charge air cooler bend collapse
• Charge air cooler improper installation
• Catalytic converter blocked.
• Turbocharger malfunction
• Fuel pressure sensor malfunction
• Supply pump malfunction
• Incorrect valve timing.
• PCM malfunction
Blue smoke:
• PCM DTC is detected.
• Oil leakage
• Incorrect or contaminated fuel in fuel tank
• Burning engine oil.
• PCV system malfunction
• Turbocharger malfunction
• Worn or damaged valve guide(s), piston ring(s), cylinder bore(s), cylinder head or gasket.
White smoke:
• PCM DTC is detected.
• Water in fuel.
• Coolant leakage
• Diesel particulate filter blocked.
• Coolant in the combustion chamber.
• Incorrect valve timing.
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Diagnostic procedure
STEP |
INSPECTION |
RESULTS |
ACTION |
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1
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VERIFY PCM DTC
• Perform the PCM DTC inspection using the M-MDS.
• Are any DTCs present?
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Yes
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Go to the applicable DTC inspection.
(See DTC TABLE [MZ-CD 1.6].)
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No
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Go to the next step.
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2
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VISUALLY INSPECT RELATED PART CONDITION
• Visually inspect the following:
Mechanical:
• Is there any malfunction?
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Yes
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Repair or replace the malfunctioning part according to the inspection results.
Repeat Step 2.
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No
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Go to the next step.
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3
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VERIFY EXHAUST GAS COLOR
• What color is the smoke coming from the exhaust system?
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Black
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Go to the next step.
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Blue
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Go to Step 20.
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White
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Go to Step 25.
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4
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DETERMINE IF MALFUNCTION CAUSE IS AIR INGRESS IN FUEL LINE OR OTHER
• Perform the “EXHAUST GAS RECIRCULATION VALVE LEARNED VALUES RESET” and “INTAKE AIR THROTTLE VALVE LEARNED VALUES RESET”.
• Verify the symptom.
• Is the symptom solved?
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Yes
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Troubleshooting is completed.
(EGR valve base setting is incorrect.)
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No
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Go to the next step.
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5
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VERIFY CURRENT INPUT SIGNAL STATUS
• Access the following PIDs using the M-MDS:
(See PCM INSPECTION [MZ-CD 1.6].)
• Monitor the each PID while driving the vehicle.
• Are all PIDs normal?
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Yes
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Go to the next step.
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No
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If the APP1 or APP2 PIDs are not specified:
• Inspect the APP sensor and related wiring harness.
If the MAF PID is not specified:
• Inspect the MAF sensor and related wiring harness.
If the ECT PID is not specified:
• Inspect the ECT sensor and related wiring harness.
Repair or replace malfunctioning part.
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6
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VISUALLY INSPECT CKP SENSOR AND PULSE WHEEL
• Visually inspect the CKP sensor and teeth of the crankshaft pulley.
• Is there any malfunction?
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Yes
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Repair or replace the malfunctioning part as necessary.
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No
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Go to the next step.
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7
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INSPECT FUEL INJECTOR
• Inspect the fuel injector for each cylinder.
• Are fuel injectors normal?
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Yes
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Go to the next step.
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No
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Replace the suspected fuel injector.
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8
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INSPECT EGR VALVE OPERATION
• Access following PCM PIDs.
• Monitor the MAF PID while driving the vehicle.
• Are PIDs value changing according to driving conditions?
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Yes
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Go to the next step.
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No
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Inspect the EGR valve for stuck.
Clean or replace the EGR valve as necessary.
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9
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INSPECT EGR COOLER BYPASS VALVE OPERATION
• Access following PCM PIDs.
• Monitor the MAF PID while driving the vehicle.
• Are PIDs value changing according to driving conditions?
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Yes
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Go to the next step.
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No
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Inspect the EGR cooler bypass valve for stuck.
Clean or replace the EGR cooler bypass valve as necessary.
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10
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INSPECT CHARGE AIR COOLER
• Visually inspect charge air cooler core.
• Are there excessive bend or collapse detected?
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Yes
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Replace the charge air cooler as necessary.
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No
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Go to the next step.
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11
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INSPECT CHARGE AIR COOLER PIPES
• Inspect the hose bands between the following parts:
• Are the hose bands loose?
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Yes
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Retighten the hose bands
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No
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Go to the next step.
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12
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INSPECT EXHAUST SYSTEM
• Visually inspect the following exhaust system part.
• Is there any malfunction?
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Yes
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Repair or replace the malfunctioning part according to the inspection results.
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No
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Go to the next step.
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13
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VISUALLY INSPECT TURBOCHARGER COMPRESSOR WHEEL
• Remove parts necessary to inspect the turbocharger without remove the turbocharger.
• Inspect if the turbocharger compressor wheel is bent, damaged, or interfering with the housing on the vehicle.
• Is there any malfunction?
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Yes
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Replace the turbocharger.
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No
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Go to the next step.
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14
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VISUALLY INSPECT TURBOCHARGER COMPRESSOR WHEEL LOCK BOLT
• Inspect if the turbocharger compressor wheel locknut is loose or has fallen down inside the turbocharger.
• Is there any malfunction?
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Yes
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Replace the turbocharger.
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No
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Go to the next step.
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15
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VERIFY TURBOCHARGER COMPRESSOR WHEEL ROTATION
• Inspect the turbocharger compressor wheel by hand.
• Does the wheel turn easily and smoothly?
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Yes
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Go to the next step.
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No
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Replace the turbocharger.
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16
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VISUALLY INSPECT TURBOCHARGER TURBINE WHEEL
• Inspect if the turbocharger turbine wheel is damaged, cracked or interfering with the housing on the vehicle.
• Is there any malfunction?
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Yes
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Replace the turbocharger.
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No
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Go to the next step.
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17
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VISUALLY INSPECT TURBOCHARGER TURBINE HOUSING FOR OIL LEAKAGE
• Is any engine oil found inside the turbocharger turbine housing?
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Yes
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If the excessive amount of oil is found:
• Replace the turbocharger.
If the small amount of oil is found:
• Wipe oil off of the vehicle, then go to the next step.
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No
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Go to the next step.
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18
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VISUALLY INSPECT TURBOCHARGER COMPRESSOR HOUSING FOR OIL LEAKAGE
• Is any engine oil found inside the turbocharger compressor housing?
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Yes
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Wipe oil off of the vehicle.
• Reinstall all removed parts in Step 13, then go to the next step.
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No
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Turbocharger is normal.
Reinstall all removed parts in Step 13, then go to the next step.
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19
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DETERMINE IF MALFUNCTION CAUSE IS SUPPLY PUMP/FUEL METERING VALVE OR OTHER
• Access the following PID using the M-MDS:
(See PCM INSPECTION [MZ-CD 1.6].)
• Monitor the each PID while driving the vehicle.
• Are all PIDs normal?
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Yes
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Inspect the valve timing.
• If the valve timing is not normal, repair or replace the malfunctioning part according to the inspection results.
If the small amount of oil is found:
• If the valve timing is normal, replace the fuel.(Poor fuel quality (e.g.: include water contamination, winter/summer blend))
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No
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Inspect the fuel pressure sensor and related wiring harness.
• If there is malfunction, repair or replace malfunctioning part.
• If there is no malfunction, replace the supply pump.
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20
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INSPECT PCV VALVE
• Inspect the PCV valve.
• Is the PCV valve normal?
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Yes
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Go to the next step.
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No
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Clean or replace the upper cylinder head cover.
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21
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INSPECT TURBOCHARGER OIL RETURN LINE FOR BLOCKAGE
• Inspect the turbocharger oil return tube blocked or damaged.
• Is there any blocked or damaged in oil return tube?
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Yes
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Repair or replace malfunctioning part.
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No
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Go to the next step.
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22
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VISUALLY INSPECT TURBOCHARGER TURBINE HOUSING FOR OIL LEAKAGE
• Remove parts necessary to inspect the turbocharger without remove the turbocharger.
• Is any engine oil found inside the turbocharger turbine housing?
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Yes
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If the excessive amount of oil is found:
• Replace the turbocharger.
If the excessive amount of oil is found:
• Wipe oil off of the vehicle, then go to the next step.
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No
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Go to the next step.
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23
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VISUALLY INSPECT TURBOCHARGER COMPRESSOR HOUSING FOR OIL LEAKAGE
• Is any engine oil found inside the turbocharger compressor housing?
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Yes
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Wipe oil off of the vehicle.
• Reinstall all removed parts in Step 21, then go to the next step.
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No
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Turbocharger is normal.
• Reinstall all removed parts in Step 21, then go to the next step.
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24
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INSPECT CYLINDER HEAD GASKET
• Remove the cylinder head.
• Visually inspect cylinder head gasket and mating surface.
• Is there any damaged or mating face wrapped?
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Yes
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Replace the cylinder head gasket, and/or clean the mating surface as necessary.
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No
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Go to the symptom troubleshooting “NO.10 HIGH ENGINE OIL CONSUMPTION”.
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25
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DETERMINE IF MALFUNCTION CAUSE IS WATER IN FUEL OR OTHER
• Perform the fuel filter water draining.
• Verify the symptom.
• Is the symptom solved?
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Yes
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Troubleshooting is completed.
(Water into the fuel line.)
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No
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Go to the next step.
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26
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INSPECT FOR ENGINE COOLANT LEAKAGE
• Perform the ENGINE COOLANT LEAKAGE INSPECTION.
• Is there any leakage detected?
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Yes
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Repair or replace the applicable part.
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No
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Go to the next step.
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27
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INSPECT FUEL LINE FOR CONTAMINATION
• Flush the fuel system through with clean fuel.
• Is the symptom solved?
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Yes
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Troubleshooting is completed.
(Contaminated fuel into the fuel line.)
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No
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Go to the next step.
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28
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DETERMINE IF MALFUNCTION CAUSE IS VALVE OPERATION SYSTEM OR OTHER
• Inspect the followings:
• Are all items normal?
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Yes
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Replace the fuel.
(Poor fuel quality (e.g.: include water contamination, winter/summer blend))
• Flush the fuel line as necessary.
If the malfunction is remains, overhaul the engine and repair or replace malfunctioning part.
(Engine internal coolant passage is malfunction.)
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No
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Repair or replace the malfunctioning part according to the inspection results.
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29
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Verify test results.
• If normal, return to the diagnostic index to service any additional symptoms.
• If the malfunction remains, inspect the related Service Information and perform the repair or diagnosis.
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