Diagnostic procedure

WARNING: This page is about a different variant/trim than selected.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	Is the engine overheating?	Yes	Go to symptom troubleshooting "NO. 17 COOLING SYSTEM CONCERNS-OVERHEATING ".
1	Is the engine 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 ."
2	Is the engine 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.
3		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.
4		No	Service if necessary. Repeat Step 4.
5	Perform the EGR system operation inspection. (See EGR CONTROL SYSTEM INSPECTION ). Does the EGR system operate properly?	Yes	Go to the next step.
5		No	Inspect or replace the malfunctioning parts, according to the inspection results.
6	Perform the TP sweep inspection. (See THROTTLE POSITION (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.
6		No	Inspect or replace the malfunctioning parts, according to the inspection results.
7	Perform the Variable Swirl Control System Operation Inspection. (See VARIABLE SWIRL SYSTEM OPERATION INSPECTION ). Does the variable swirl system work properly?	Yes	Go to the next step.
7		No	Inspect or replace the malfunctioning parts, according to the inspection results.
8	Perform the Wastegate Control System Operation Inspection. (See WASTEGATE CONTROL SYSTEM OPERATION INSPECTION ). Does the variable swirl system work properly?	Yes	Go to the next step.
8		No	Inspect or replace the malfunctioning parts, according to the inspection results.
9	Perform the Evaporative Emission (EVAP) System Leak Inspection. (See WASTEGATE CONTROL SYSTEM OPERATION INSPECTION ). Does the variable swirl system work properly?	Yes	Go to the next step.
9		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.
10	Remove and shake the PCV valve. Does the PCV valve rattle?	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.
11		No	Inspect or replace the malfunctioning parts, according to the inspection results.
12	Inspect CMP and CKP sensor for the following; Installation condition (See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION ). (See CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION ). 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.
12		No	Go to the next step.
13	Connect the WDS or equivalent to the DLC-2. Access and monitor the following Plus 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? (See USING THE WDS OR EQUIVALENT ).	Yes	Go to the next step.
13		No	Inspect and repair or replace suspected parts and the related harnesses. If the malfunction remains, perform the intermittent concern troubleshooting procedure. (See INTERMITTENT CONCERN TROUBLESHOOTING ).
14	Access and monitor the FUEL_PRES PID. Is the FUEL_PRES PID value within the specification? (See USING THE WDS OR EQUIVALENT ).	Yes	Go to Step 18.
14		No	Go to the next step.
15	Is the vehicle accelerate performance normally?	Yes	Go to the next step.
15	Is the vehicle accelerate performance normally?	No	Go to Step 17.
16	Inspect the fuel pressure sensor. (See FUEL PRESSURE SENSOR INSPECTION ). Is the fuel pressure sensor normal?	Yes	Go to Step 18.
16		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? (See USING THE WDS OR EQUIVALENT ).	Yes	Troubleshooting is completed. Go to Step 22.
17		No	Go to the next step.
18	Inspect the turbocharger. (See TURBOCHARGER INSPECTION ). Is there any problem in turbocharger?	Yes	Replace the turbocharger.
18		No	Go to the next step.
19	Inspect the three-way catalytic converter (TWC). Is the TWC normal?	Yes	Go to the next step.
19		No	Replace the TWC.
20	Inspect the fuel injector for each cylinder. (See FUEL INJECTOR INSPECTION ). Are fuel injectors normal?	Yes	Go to the next step.
20		No	Replace the suspected fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION ).
21	Measure the compression pressure for each cylinder. (See COMPRESSION INSPECTION ). Are compression, pressures within the specification?	Yes	Replace the injector driver module. If the problem remains, overhaul the engine.
21		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.