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 NO.15 EMISSION COMPLIANCE [L3 Turbo]

NO.15 EMISSION COMPLIANCE [L3 Turbo]

id0103b4802100

15

EMISSION COMPLIANCE

DESCRIPTION

Fails emissions test.

POSSIBLE CAUSE

• Poor fuel quality
• Vacuum lines leakage or blockage
• Cooling system malfunction
• Engine overheating
• Spark plug malfunction
• Air leakage from intake-air system
• Variable swirl system malfunction
• Wastegate control system improper operation
• Turbocharger malfunction
• Charge air cooler malfunction
• Inadequate fuel pressure (high-pressure side)
• PCV valve malfunction or incorrect valve installation
• EGR system malfunction
• Exhaust system and/or three-way catalytic converter restriction
• Fuel tank ventilation system malfunction
• Charcoal canister damage
• Air cleaner element clogging or restriction
• Throttle body malfunction
• Improper operation of electronic throttle control system
• Relief valve malfunction (built-in delivery pipe)
• Suction control valve malfunction (built-in high pressure fuel pump)
• Improper air/fuel mixture ratio control operation
• Erratic or no signal from CMP sensor
• Erratic signal from CKP sensor
• A/F sensor, HO2S or related circuit malfunction
• ECT or related circuit malfunction
• MAF sensor or related circuit malfunction
• IAT sensor No.1 or related circuit malfunction
• IAT sensor No.2 or related circuit malfunction
• Fuel pressure sensor or related circuit malfunction
• Accelerator position sensor or related circuit malfunction
• TP sensor or related circuit malfunction
• Manifold absolute pressure (MAP) sensor or related circuit malfunction
• Neutral or clutch switch malfunction
• VSS or related circuit malfunction
• Fuel line restriction
• High pressure fuel pump malfunction
• Fuel injector or related circuit malfunction
• Incorrect fuel injection timing
• Three-way catalytic converter (TWC) malfunction
• Engine internal parts malfunction
• Excessive carbon is built-up in combustion chamber
• Improper engine compression
• Improper valve timing
• Injector driver module or related circuit 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 REPAIR ROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual.
(See BEFORE SERVICE PRECAUTION [L3 Turbo].)
(See AFTER SERVICE PRECAUTION [L3 Turbo].)
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
Is the engine overheating?
Yes
Go to symptom troubleshooting "NO.17 COOLING SYSTEM CONCERNS - OVERHEATING."
No
Go to the next step.
2
Is the engine runs cold?
Yes
Go to symptom troubleshooting "NO.18 COOLING SYSTEM CONCERNS - RUNS COLD."
No
Go to the next step.
3
Connect the WDS or equivalent to the DLC.
Perform the self-test function using the WDS or equivalent.
Turn the ignition switch to the ON position.
Retrieve any DTCs.
Is a DTC displayed?
Yes
DTC is displayed:
Go to appropriate DTC test.
No
No DTC is displayed:
Go to the next step.
4
Inspect for the following.
• Fuel quality (proper octane, contamination, winter/summer blend)
• Charge air cooler condition (restriction or damaged)
• Air cleaner element (clogging or restriction)
• Intake-air system leakage
• PCV valve installation
• Vacuum line leakage or blockage
• Fuel leakage at fuel system
• Charcoal canister damaged
• Exhaust system and/or three-way catalytic converter restriction
Are all items normal?
Yes
Go to the next step.
No
Service if necessary.
Repeat Step 4.
5
Perform the EGR system operation inspection.
Does the EGR system operate properly?
Yes
Go to the next step.
No
Inspect or replace the malfunctioning parts, according to the inspection results.
6
Perform the TP sweep inspection.
Does the electronic throttle control system work properly?
Yes
Visually inspect the throttle body (damaged/scratching.) If normal, go to the next step.
No
Inspect or replace the malfunctioning parts, according to the inspection results.
7
Perform the Variable Swirl Control System Operation Inspection.
Does the variable swirl system work properly?
Yes
Go to the next step.
No
Inspect or replace the malfunctioning parts, according to the inspection results.
8
Perform the Wastegate Control System Operation Inspection.
Does the variable swirl system work properly?
Yes
Go to the next step.
No
Inspect or replace the malfunctioning parts, according to the inspection results.
9
Perform the Evaporative Emission (EVAP) System Leak Inspection.
Does the variable swirl system work properly?
Yes
Go to the next step.
No
Inspect or replace the malfunctioning parts, according to the inspection results.
10
Remove and shake the PCV valve.
Does the PCV valve rattle?
Yes
Go to the next step.
No
Replace the PCV valve.
11
Perform the spark test.
(See Spark Test.)
Is a strong blue spark visible at each cylinder?
Yes
Go to the next step.
No
Inspect or replace the malfunctioning parts, according to the inspection results.
12
Inspect CMP and CKP sensor for the following;
• Installation condition
• Damaged trigger wheel and camshaft
• Open or short circuit in the wiring harnesses
Is there any malfunction detected?
Yes
Repair or replace the malfunctioning part according to the inspection results.
No
Go to the next step.
13
Connect the WDS or equivalent to the DLC-2.
Access and monitor the following PIDs using the data monitor function.
• ECT
• MAF
• IAT
• IAT2
• APP
• TP
• MAP
• VSS
• O2S11
• O2S12
• LONGFT1
• SHTFT1
• CPP (PCM terminal 1H)
• PNP (PCM terminal 1W)
Do the PIDs indicate the correct values according to the engine operating condition?
Yes
Go to the next step.
No
Inspect and repair or replace suspected parts and the related harnesses.
If the malfunction remains, perform the intermittent concern troubleshooting procedure.
14
Access and monitor the FUEL_PRES PID.
Is the FUEL_PRES PID value within the specification?
Yes
Go to Step 18.
No
Go to the next step.
15
Is the vehicle accelerate performance normally?
Yes
Go to the next step.
No
Go to Step 17.
16
Inspect the fuel pressure sensor.
Is the fuel pressure sensor normal?
Yes
Go to Step 18.
No
Replace the delivery pipe.
17
Replace the high pressure fuel pump.
Monitor FUEL_PRES PID.
Is the FUEL_PRES PID value within the specified?
Yes
Troubleshooting is completed.
Go to Step 22.
No
Go to the next step.
18
Inspect the turbocharger.
Is there any problem in turbocharger?
Yes
Replace the turbocharger.
No
Go to the next step.
19
Inspect the three-way catalytic converter (TWC).
Is the TWC normal?
Yes
Go to the next step.
No
Replace the TWC.
20
Inspect the fuel injector for each cylinder.
Are fuel injectors normal?
Yes
Go to the next step.
No
Replace the suspected fuel injector.
21
Measure the compression pressure for each cylinder.
Are compression pressures within the specification?
Yes
Replace the injector driver module.
If the problem remains, overhaul the engine.
No
Inspect for the 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.
22
Verify test results.
• If normal, return to the diagnostic index to service any additional symptoms.
• If a malfunction remains, inspect the related Service Bulletins and/or On-line Repair 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, reprogram the PCM if a later calibration is available. Retest.