Symptom Troubleshooting - Engine - (L3 with TC): Diagnosis

ENGINE SYMPTOM TROUBLESHOOTING [L3 WITH TC]

Verify malfunction symptoms using the following diagnostic index, then go to the appropriate troubleshooting chart.

Diagnostic Index

No.	TROUBLESHOOTING ITEM		DESCRIPTION
1	Melting of main or other fuses
2	MIL illuminates		MIL is illuminated.
3	Will not crank		Starter does not work.
4	Hard to start/long crank/erratic start/erratic crank		Starter cranks engine at normal speed but engine requires excessive cranking time before starting.
5	Engine stalls.	After start/at idle	Engine stops unexpectedly at idle or after start or both.
6	Cranks normally but will not start		Starter cranks engine at normal speed but engine will not run.
7	Slow return to idle		Engine takes more time than normal to return to idle speed.
8	Engine runs rough/rolling idle		Engine speed fluctuates between specified idle speed and lower speed and engine shakes excessively.
9	Fast idle/runs on		Engine speed continues at fast idle after warm-up. Engine runs after ignition switch is turned off.
10	Low idle/stalls during deceleration		Engine stops unexpectedly at beginning of deceleration or recovery from deceleration.
11	Engine stalls/quits.	Acceleration/cruise	Engine stops unexpectedly at beginning of acceleration or during acceleration. Engine stops unexpectedly while cruising.
	Engine runs rough.	Acceleration/cruise	Engine speed fluctuates during acceleration or cruising.
	Misses	Acceleration/cruise	Engine misses during acceleration or cruising.
	Buck/jerk	Acceleration/cruise/deceleration	Vehicle bucks/jerks during acceleration, cruising, or deceleration.
	Hesitation/stumble	Acceleration	Momentary pause at beginning of acceleration or during acceleration
	Surges	Acceleration/cruise	Momentary minor irregularity in engine output
12	Lack/loss of power	Acceleration/cruise	Performance is poor under load. (e.g., power down when climbing hills)
13	Knocking/pinging	Acceleration/cruise	Sound is produced when air/fuel mixture is ignited by something other than spark plug. (e.g., hot spot in combustion chamber)
14	Poor fuel economy		Fuel economy is unsatisfactory.
15	Emission compliance		Fails emissions test.
16	High oil consumption/leakage		Oil consumption is excessive.
17	Cooling system concerns	Overheating	Engine runs at higher than normal temperature/overheats.
18	Cooling system concerns	Runs cold	Engine does not reach normal operating temperature.
19	Exhaust smoke		Blue, black, or white smoke from exhaust system
20	Fuel odor (in engine compartment)		Gasoline fuel smell or visible leakage
21	Engine noise		Engine noise from under hood
22	Vibration concerns (engine)		Vibration from under hood or driveline
23	A/C does not work sufficiently.		A/C compressor magnetic clutch does not engage when A/C is turned on.
24	A/C is always on or A/C compressor runs continuously.		A/C compressor magnetic clutch does not disengage.
25	A/C is not cut off under WOT conditions.		A/C compressor magnetic clutch does not disengage under WOT.
26	Exhaust sulphur smell		Rotten egg smell (sulphur) from exhaust
27	Fuel refill concerns		Fuel tank does not fill smoothly.
28	Fuel filling shut off issues		Fuel does not shut off properly.
29	Spark plug condition		Incorrect spark plug condition

DIAGNOSTIC INDEX DESCRIPTION

Scheme 27

Scheme 27: CONTROL SYSTEM DEVICE AND CONTROL RELATIONSHIP CHART [L3 WITH TC]

Scheme 28

Scheme 29

Scheme 29: QUICK DIAGNOSTIC CHART [L3 WITH TC]

Scheme 30

Scheme 31

Scheme 32

Scheme 33

Scheme 34

Scheme 35

Scheme 36

Scheme 36: NO.1 MELTING OF MAIN OR OTHER FUSES [L3 WITH TC]

Damaged fuse	Related wiring harness
BTN	BTN fuse OBD fuse (PJB) DLC-2
IG KEY1	IG KEY1 fuse Ignition switch ENGINE fuse (PJB)
IG KEY2	IG KEY 2 fuse Ignition switch Starter relay starter interlock switch
ENG+B	ENG +B fuse PCM
ENGINE	ENGINE fuse Main relay ENG BAR 1 fuse ENG BAR 2 fuse ENG BAR 3 fuse PCM
FUEL PUMP	FUEL PUMP fuse Fuel pump resistor Fuel pump speed control relay Fuel pump relay Fuel pump unit
INJECTOR	INJ fuse Injector relay PCM
ETC	ETC fuse Drive-by-wire relay PCM
ENG BAR 1	ENG BAR 1 fuse APP sensor PCM Drive-by-wire relay Oil control valve CKP sensor EGR valve Wastegate control solenoid valve Purge solenoid valve Variable swirl solenoid valve CMP sensor MAF/IAT sensor EVAP system leak detection pump
ENG BAR 2	ENG BAR fuse PCM
ENG BAR 3	ENG BAR fuse Front HO2S
FAN	FAN fuse Fan control module
MAIN	MAIN fuse Generator Starter
STARTER	STARTER fuse Starter relay Starter
ENGINE (PJB)	ENGINE fuse (PJB) Fuel pump speed control relay Fuel pump relay PCM Injector relay Ignition coil (No.1, No.2, No.3, No.4) Condenser Rear HO2S

FUSES DESCRIPTION

Diagnostic procedure

STEP	INSPECTION	RESULTS	ACTION
1	Connect the M-MDS to the DLC. Turn the ignition switch to the ON position. Retrieve any DTCs. Is a DTC displayed?	Yes	DTC is displayed: Go to the appropriate DTC test. (See DTC TABLE [L3 WITH TC] .)
1		No	No DTC is displayed: Inspect for an open or short to circuit between instrument cluster terminal 11 and PCM terminal 1AM. Inspect for an open or short to circuit between instrument cluster terminal 1K and PCM terminal 1AI. (See INSTRUMENT CLUSTER INSPECTION .)
2	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.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION	RESULTS	ACTION
1	NOTE: The following test should be performed on the advanced keyless entry system. Go to Step 8 for vehicles without immobilizer system. Connect the M-MDS to the DLC-2.Do the following conditions appear? The engine is not completely started. DTC 1260 is displayed.	Yes	Both conditions appear: Go to step 4.
1		No	Either or other condition appears: Go to the next step.
2	Is the coil connector securely connected to the coil?	Yes	Go to the next step.
2	Is the coil connector securely connected to the coil?	No	Connect the coil antenna connector securely. Return to step 1.
3	Does the security light illuminate?	Yes	Go to the next step.
3	Does the security light illuminate?	No	Inspect instrument cluster and wiring harness. (See INSTRUMENT CLUSTER INSPECTION .)
4	Connect the M-MDS to the DLC-2 and retrieve DTC. DTC B1213, B2139, B2141, B1600, B1601, B1602, B1681, B2103, B2431, U2510	Yes	Go to the appropriate DTC inspection. (See DTC TABLE [IMMOBILIZER SYSTEM] .)
4		No	Go to the next step.
5	Inspect for the following wiring harnesses and connectors: Between coil antenna terminal A and instrument cluster terminal 2Q Between coil antenna terminal B and instrument cluster terminal 2S Is there any malfunction?	Yes	Repair or replace suspected wiring harness and connector.
5		No	Go to the next step.
6	Inspect for the following wiring harnesses and connectors Between PCM terminal 1AI and instrument cluster terminal 1I Between PCM terminal 1AM and instrument cluster terminal 1K Is there any malfunction?	Yes	Repair or replace suspected wiring harness and connector.
6		No	Go to the next step.
7	Inspect the following: Battery connection Battery condition (See BATTERY INSPECTION [L3 WITH TC] .) Fuses (See NO.1 MELTING OF MAIN OR OTHER FUSES [L3 WITH TC] .) Are all items normal?	Yes	Go to the next step.
7		No	Service if necessary. Repeat step 7.
8	Is clicking sound heard from starter relay when the ignition switch is turned to start?	Yes	Go to step 13.
8		No	Go to the next step.
9	INSPECT STARTER INTERLOCK SWITCH Inspect the starter interlock switch Is starter interlock switch normal?	Yes	Go to the next step.
9		No	Inspect the starter interlock switch and related wiring harnesses. Repair or replace components as required. Then repeat step 8.
10	Inspect the starter relay and following harnesses. Between starter relay and PCM Between starter relay and ignition switch. (See RELAY INSPECTION .) Are they normal?	Yes	Go to the next step.
10		No	Repair or replace components as required. Then repeat step 8.
11	Inspect ignition switch and related harnesses. (See IGNITION SWITCH INSPECTION .) Are they normal?	Yes	Go to the next step.
11		No	Repair or replace components as required. Then repeat step 8.
12	Inspect the following harnesses. Between starter relay and battery Between starter relay and starter Are they normal?	Yes	Go to the next step.
12		No	Repair or replace as required. Then go to the next step.
13	Inspect the starting system. (See STARTER INSPECTION [L3 WITH TC] .) Is the starting system normal?	Yes	Go to the next step.
13		No	Repair or replace components as required.
14	Inspect for seized/hydro locked engine or flywheel. Is engine seized or hydro/locked?	Yes	Repair or replace components as required.
14		No	Go to the next step.
15	Connect the M-MDS to the DLC-2. Retrieve any continuous memory DTCs. Are there any continuous memory DTCs displayed?	Yes	DTC is displayed: Go to the appropriate DTC test. (See DTC TABLE [L3 WITH TC] .) Communication error message is displayed: Inspect for following: Open circuit in wiring harness between main relay terminal B and PCM terminal 1AT Open circuit in wiring harness between main relay terminal D and PCM terminal 1BE Main relay is stuck open. Open or short circuit in wiring harness between the DLC-2 and PCM terminals 1AM or 1AI Open or poor GND circuit (PCM terminal 1BB, 1BA, 1AZ, 1BG, 1BD, or 1BH) Poor connection of vehicle body GND
15		No	No DTC is displayed: Go to the next step.
16	Retrieve any KOEO DTCs using M-MDS. Are there DTCs displayed during KOEO inspection?	Yes	DTC is displayed: Go to the appropriate DTc inspection. (See DTC TABLE [L3 WITH TC] .)
16		No	No DTC is displayed: Go to the next step.
17	Verify test results. If normal, return to the diagnostic index to service any additional symptoms. (See QUICK DIAGNOSTIC CHART [L3 WITH TC] .) 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, replace the PCM. (See PCM REMOVAL/INSTALLATION [L3 WITH TC] .)

NOTE
The following test should be performed on the advanced keyless entry system. Go to Step 8 for vehicles without immobilizer system.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION	RESULTS	ACTION
1	Inspect for the following: Fuel quality (proper octane, contamination, winter/summer blend) Fuel leakage Intake-air system leakage or restriction Vacuum leakage Are all items normal?	Yes	Go to the next step.
1		No	Service if necessary. Repeat Step 1.
2	Perform the self-test function using the M-MDS. Turn the ignition switch to the ON position. Retrieve any DTCs. Is a DTC displayed?	Yes	DTC is displayed: Go to the appropriate DTC test. (See DTC TABLE [L3 WITH TC] .)
2		No	No DTC is displayed: Go to the next step.
3	Access the ECT PID using the M-MDS. Verify that the ECT PID is less than 116°C {241°F} during driving. Is the ECT PID less than specified?	Yes	Go to the next step.
3		No	The cause of this concern could be from the cooling system overheating. Perform the symptom troubleshooting "NO.17 COOLING SYSTEM CONCERNS - OVERHEATING." (See NO.17 COOLING SYSTEM CONCERNS-OVERHEATING [L3 WITH TC] ).
4	Will the engine run smoothly at part throttle?	Yes	Go to the next step.
4	Will the engine run smoothly at part throttle?	No	Go to Step 6.
5	Perform the TP sweep inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the electronic throttle control system work properly?	Yes	Visually inspect the throttle body (damage/scratching.) If normal, go to the next step.
5		No	Inspect or replace the malfunctioning parts, according to the inspection results.
6	Perform the EGR system operation inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the EGR system operate properly?	Yes	Go to the next step.
6		No	Inspect or replace the malfunctioning parts, according to the inspection results.
7	Perform the Purge Control System Operation inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the purge solenoid valve work properly?	Yes	Go to the next step.
7		No	Inspect or replace the malfunctioning parts, according to the inspection results.
8	Inspect the CMP and CKP sensor for the following; Installation condition (See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION [L3 WITH TC] .) (See CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION [L3 WITH TC] .) 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.
8		No	Go to the next step.
9	Access and monitor following the PIDs using the data monitor function. ECT MAF O2S11 O2S12 LONGFT1 SHTFT1 Do the PIDs indicate the correct values under trouble condition? (See PCM INSPECTION [L3 WITH TC] .)	Yes	Go to the next step.
9		No	Inspect and repair or replace suspected parts and the related harnesses. If the malfunction remains, perform the intermittent concern troubleshooting. (See INTERMITTENT CONCERN TROUBLESHOOTING [L3 WITH TC] ).
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	Inspect for restriction in the exhaust system and the three-way catalytic converter (TWC). Is there any restriction?	Yes	Replace the malfunctioning part.
11		No	Go to the next step.
12	Perform the spark test. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Is a strong blue spark visible at each cylinder?	Yes	Go to the next step.
12		No	Inspect or replace the malfunctioning parts, according to the inspection results.
13	Access and monitor the FUEL PRES PID. Is the FUEL_PRES PID value within the specification? (See PCM INSPECTION [L3 WITH TC] .)	Yes	Go to Step 38.
13		No	Go to the next step.
14	Is the vehicle accelerate performance normally?	Yes	Go to the next step.
14	Is the vehicle accelerate performance normally?	No	Go to Step 16.
15	Inspect the fuel pressure sensor. (See FUEL PRESSURE SENSOR INSPECTION [L3 WITH TC] .) Is the fuel pressure sensor normal?	Yes	Go to Step 17.
15		No	Replace the delivery pipe.
16	Replace the high pressure fuel pump. Monitor FUEL PRES PID. Is the FUEL_PRES PID value within the specified? (See PCM INSPECTION [L3 WITH TC] .)	Yes	Troubleshooting is completed. Go to Step 21.
16		No	Inspect the fuel pressure sensor. (See FUEL PRESSURE SENSOR INSPECTION [L3 WITH TC] .)
17	Connect the fuel pressure gauge between the fuel pump and the high pressure fuel pump. Measure the fuel pressure line of the low pressure side. (See FUEL LINE PRESSURE INSPECTION [L3 WITH TC] .) Is the fuel pressure within the specification?	Yes	Go to the next step.
17		No	Inspect for the following: Fuel line restriction Fuel filter clogging If normal replace the fuel pump.
18	Inspect the fuel injector for each cylinder. (See FUEL INJECTOR INSPECTION [L3 WITH TC] .) Are the fuel injectors normal?	Yes	Go to the next step.
18		No	Replace the suspected fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION [L3 WITH TC] .)
19	Measure the compression pressure for each cylinder. (See COMPRESSION INSPECTION [L3 WITH TC] .) Does the starting system work properly?	Yes	Go to the next step.
19		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.
20	Inspect the starting system. (See STARTER INSPECTION [L3 WITH TC] .) Does the starting system work properly?	Yes	Replace the injector driver module. If the problem remains, overhaul the engine.
20		No	Repair or replace the malfunctioning part.
21	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.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION	RESULTS	ACTION
1	Connect the M-MDS to the DLC-2. Do any of the following conditions appear? Engine does not start completely. DTC B1681 is displayed.	Yes	Both conditions are appear: Go to Step 5.
1		No	Either or other condition appears: Go to the next step.
2	Does the engine stall after approx. 2s from when it is started?	Yes	Go to the next step.
2		No	Is the immobilizer system is normal? Go to Step 16.
3	Is the coil connector securely connected to coil?	Yes	Go to the next step.
3	Is the coil connector securely connected to coil?	No	Connect the connector securely, retest from Step 2.
4	Does the security light illuminate?	Yes	Go to the next step.
4	Does the security light illuminate?	No	Inspect and repair or replace the following: Wiring harnesses and connectors from PCM terminal 1 Al and instrument cluster terminal 1K Wiring harnesses and connectors from PCM terminal 1 AM and instrument cluster terminal 1l (See INTERMITTENT CONCERN TROUBLESHOOTING [L3 WITH TC] ).
5	Retrieve the DTC using the M-MDS. Are any of the following DTCs present? DTC B1213, B1342, B1600, B1601, B1602, B1681, B2103, B2431	Yes	Go to appropriate DTC test. (See DTC TABLE [IMMOBILIZER SYSTEM] )
5		No	Advanced keyless entry system is not equipped: Go to the next step. Advanced keyless entry system is equipped: Go to Step 11.
6	Is there continuity between PCM terminal 1BB, 1BH, 1BD, 1BG, 1AZ and ground?	Yes	Go to the next step.
6		No	Repair or replace the wiring harness.
7	Turn the ignition switch to the ON position (Engine off.) Measure the voltage between PCM terminal 1BB, 1BH, 1BD, 1BG, 1AZ and ground. Is the voltage below 1.0V?	Yes	Go to the next step.
7		No	Repair or replace the wiring harness.
8	Turn the ignition switch to the ON position. (Engine off) Access the VPWR PID. Is the VPWR PI D normal? VPWR PID Battery voltage	Yes	Go to the next step.
8		No	Repair or replace the wiring harness.
9	Disconnect the coil connector. Turn the ignition switch to the ON position. (Engine off) Is there battery voltage at coil connector terminal D?	Yes	Go to the next step.
9		No	Repair or replace the wiring harness between coil connector terminal D and the fuse panel.
10	Inspect the following wiring harness and connectors. Between coil terminal A and keyless CM terminal 3V Between coil terminal B and keyless CM terminal 3U Is there any malfunction (open or short circuit, terminal corrosion, etc.)?	Yes	Repair or replace malfunction part.
10		No	Go to the next step.
11	Inspect for the following: Fuel quality (proper octane, contamination, winter/summer blend) Intake-air system leakage and restriction Electrical connectors Poor connection for PCM ground and body ground Fuel leakage Vacuum leakage Are all items normal?	Yes	Go to the next step.
11		No	Service if necessary. Repeat Step 11.
12	Perform the self-test function using M-MDS. Turn the ignition switch to the ON position. Retrieve any DTCs. Is the DTC displayed?	Yes	DTC is displayed: Go to the appropriate DTC test. (See DTC TABLE [L3 WITH TC] .)
12		No	No DTC is displayed: Go to the next step.
13	Access the ECT PID using the M-MDS. Verify that the ECT PID is less than 116°C {241°F} during driving. Is the ECT PID less than specified?	Yes	Go to the next step.
13		No	The cause of this concern could from be cooling system overheating. Perform the symptom troubleshooting "NO.17 COOLING SYSTEM CONCERNS - OVERHEATING." (See NO.17 COOLING SYSTEM CONCERNS-OVERHEATING [L3 WITH TC] ).
14	Access the VPWR PID. Turn the ignition switch to the ON position. (Engine off) Does the VPWR PID indicate B+?	Yes	Go to the next step.
14		No	Repair or replace the wiring harness between main relay terminal C and PCM terminal 2Y and 1D.
15	Perform the A/C Cut-off Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the A/C Cut-off Operation work properly?	Yes	Go to the next step.
15		No	Repair or replace malfunctioning parts according to the inspection results.
16	Will the engine run smoothly at part throttle?	Yes	Go to the next step.
16	Will the engine run smoothly at part throttle?	No	Go to Step 18.
17	Perform the TP sweep inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the electronic throttle control system work properly?	Yes	Visually inspect the throttle body (damaged/scratching.) If normal, go to the next step.
17		No	Inspect or replace the malfunctioning parts, according to the inspection results.
18	Perform the EGR system operation inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does EGR system operate properly?	Yes	Go to the next step.
18		No	Inspect or replace the malfunctioning parts, according to the inspection results.
19	Perform the Purge Control System Operation inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the purge solenoid valve work properly?	Yes	Go to the next step.
19		No	Inspect or replace the malfunctioning parts, according to the inspection results.
20	Perform the Variable Valve Timing Control System Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the variable valve timing control system work properly?	Yes	Inspect the valve timing.
20		No	Inspect or replace the malfunctioning parts, according to the inspection results.
21	Inspect the CMP and CKP sensor for the following; Installation condition (See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION [L3 WITH TC] .) (See CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION [L3 WITH TC] .) 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 inspection results.
21		No	Go to the next step.
22	Access and monitor the following PIDs using the data monitor function. ECT APP MAF O2S11 O2S12 LONGFT1 SHTFT1 Do the PIDs indicate the correct values under the malfunction condition? (See PCM INSPECTION [L3 WITH TC] .)	Yes	Go to the next step.
22		No	Inspect and repair or replace suspected parts and related harnesses. If the malfunction remains, perform the intermittent concern troubleshooting procedure. (See INTERMITTENT CONCERN TROUBLESHOOTING [L3 WITH TC] ).
23	Remove and shake the PCV valve. Does the PCV valve rattle?	Yes	Go to the next step.
23	Remove and shake the PCV valve. Does the PCV valve rattle?	No	Replace the PCV valve.
24	Inspect for restriction in the exhaust system and Three-way catalytic converter (TWC). Is there any restriction?	Yes	Replace malfunctioning part.
24		No	Go to the next step.
25	Perform the spark test. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Is a strong blue spark visible at each cylinder?	Yes	Go to the next step.
25		No	Inspect or replace the malfunctioning parts, according to the inspection results.
26	Access and monitor the FUEL_PRES PID. Is the FUEL PRES PID value within the specification? (See PCM INSPECTION [L3 WITH TC] .)	Yes	Go to Step 35.
26		No	Go to the next step.
27	Is the vehicle accelerate performance normally?	Yes	Go to the next step.
27	Is the vehicle accelerate performance normally?	No	Go to Step 34.
28	Inspect the fuel pressure sensor. (See FUEL PRESSURE SENSOR INSPECTION [L3 WITH TC] .) Is the fuel pressure sensor normal?	Yes	Go to Step 35.
28		No	Replace the delivery pipe.
29	Replace the high pressure fuel pump. Monitor FUEL PRES PID. Is the FUEL_PRES PID value within the specified? (See PCM INSPECTION [L3 WITH TC] .)	Yes	Troubleshooting is completed. Go to Step 38.
29		No	Inspect the fuel pressure sensor. (See FUEL PRESSURE SENSOR INSPECTION [L3 WITH TC] .)
30	Connect the fuel pressure gauge between the fuel pump and the high pressure fuel pump. Measure the fuel pressure line of the low pressure side. (See FUEL LINE PRESSURE INSPECTION [L3 WITH TC] .) Is the fuel pressure within the specification?	Yes	Go to the next step.
30		No	Inspect for the following: Fuel line restriction Fuel filter clogging If normal, replace the fuel pump.
31	Inspect the fuel injector for each cylinder. (See FUEL INJECTOR INSPECTION [L3 WITH TC] .) Are the fuel injectors normal?	Yes	Go to the next step.
31		No	Replace the suspected fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION [L3 WITH TC] .)
32	Measure the compression pressure for each cylinder. (See COMPRESSION INSPECTION [L3 WITH TC] .) Are the compression pressures within the specification?	Yes	Replace the injector driver module. If the problem remains, overhaul the engine.
32		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.
33	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.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION	RESULTS	ACTION
1	Connect the M-MDS to the DLC-2. Do any of the following conditions appear? Engine does not completely start. DTC B1681 is displayed.	Yes	Both conditions are appear: Go to Step 5.
1		No	Either or other condition appears: Go to the next step.
2	Does the engine stall after approx. 2s from when it is started?	Yes	Go to the next step.
2		No	Is the Is the immobilizer system is normal. Go to Step 20.
3	Is the coil connector securely connected to coil?	Yes	Go to the next step.
3	Is the coil connector securely connected to coil?	No	Connect the connector securely, retest from Step 1.
4	Does the security light illuminate?	Yes	Go to the next step.
4	Does the security light illuminate?	No	Inspect and repair or replace the following: Wiring harnesses and connectors from PCM terminal 1AI and instrument cluster terminal 1K Wiring harnesses and connectors from PCM terminal 1AM and instrument cluster terminal 11 (See INSTRUMENT CLUSTER INSPECTION .)
5	Retrieve the DTC using the M-MDS. Are any of the following DTCs present? DTC B1213, B1342, B1600, B1601, B1602, B1681, B2103, B2431	Yes	Go to appropriate DTC test. (See DTC TABLE [IMMOBILIZER SYSTEM] .)
5		No	Advanced keyless entry system is not equipped: Go to the next step. Advanced keyless entry system is equipped: Go to Step 11.
6	Is there continuity between PCM terminal 1BB, 1BH, 1BD, 1BG, 1AZ and ground?	Yes	Go to the next step.
6		No	Repair or replace the wiring harness.
7	Turn the ignition switch to the ON position (Engine off.) Measure the voltage between PCM terminal 1BB, 1BH, 1BD, 1BG, 1AZ and ground. Is the voltage below 1.0V?	Yes	Go to the next step.
7		No	Repair or replace the wiring harness.
8	Turn the ignition switch to the ON position. (Engine off) Access the VPWR PID. Is the VPWR PID normal? VPWR PID Battery voltage	Yes	Go to the next step.
8		No	Repair or replace the wiring harness.
9	Disconnect the coil connector. Turn the ignition switch to the ON position. (Engine off) Is there battery voltage at coil connector terminal D?	Yes	Go to the next step.
9		No	Repair or replace the wiring harness between coil connector terminal D and the fuse panel.
10	Inspect the following wiring harness and connectors. Between coil terminal A and keyless CM terminal 3V Between coil terminal B and keyless CM terminal 3U Is there any malfunction (open or short circuit, terminal corrosion, etc.)?	Yes	Repair or replace malfunctioning part.
10		No	Go to the next step.
11	Inspect for the following: Fuel quality (proper octane, contamination, winter/summer blend) Intake-air system leakage and restriction Electrical connectors Fuses Fuel leakage Vacuum leakage Poor connection for PCM ground and body ground Are all items normal?	Yes	Go to the next step.
11		No	Service if necessary. Repeat Step 11.
12	Perform the self-test function using the M-MDS. Turn the ignition switch to the ON position. Retrieve any DTCs. Is a DTC displayed?	Yes	DTC is displayed: Go to the appropriate DTC test. (See DTC TABLE [L3 WITH TC] .)
12		No	No DTC is displayed: Go to the next step.
13	Access the ECT PID using the M-MDS. Verify that the ECT PID is less than 116°C {241°F} during driving. Is the ECT PID less than specified?	Yes	Go to the next step.
13		No	The cause of this concern could be from the cooling system overheating. Perform the symptom troubleshooting "NO.17 COOLING SYSTEM CONCERNS - OVERHEATING." (See NO.17 COOLING SYSTEM CONCERNS-OVERHEATING [L3 WITH TC] ).
14	Does the engine start with throttle close?	Yes	Go to the next step.
14	Does the engine start with throttle close?	No	Go to Step 25.
15	Perform the Variable Valve Timing Control System Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the variable valve timing control system work properly?	Yes	Inspect the valve timing.
15		No	Inspect or replace the malfunctioning parts, according to the inspection results.
16	Will the engine start and run smoothly at part throttle?	Yes	Go to the next step.
16	Will the engine start and run smoothly at part throttle?	No	Go to Step 23.
17	Perform the TP sweep inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the electronic throttle control system work properly?	Yes	Visually inspect the throttle body (damaged/scratching.) If normal, go to the next step.
17		No	Inspect or replace the malfunctioning parts, according the to inspection results.
18	Access the RPM PID using the M-MDS. Is the RPM PID indicating engine speed when the cranking engine.	Yes	Go to the next step.
18		No	Inspect the CKP sensor for following; Installation condition (See CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION [L3 WITH TC] .) Damaged trigger wheel and camshaft Open or short circuit in wiring harnesses Is there any malfunction detected?
19	Inspect CMP sensor for the following; Installation condition (See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION [L3 WITH TC] .) Damaged trigger wheel and camshaft Open or short circuit in wiring harnesses Is there any malfunction detected?	Yes	Repair or replace the malfunctioning part according inspection results.
19		No	Go to the next step.
20	Perform the EGR system operation inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does EGR system operate properly?	Yes	Go to the next step.
20		No	Inspect or replace the malfunctioning parts, according to the inspection results.
21	Perform the Purge Control System Operation inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the purge solenoid valve work properly?	Yes	Go to the next step.
21		No	Inspect or replace the malfunctioning parts, according to the inspection results.
22	Access and monitor the following PIDs using the data monitor function. ECT APP MAF O2S11 O2S12 LONGFT1 SHTFT1 Do the PIDs indicate the correct values under the malfunction condition? (See PCM INSPECTION [L3 WITH TC] .)	Yes	Go to the next step.
22		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 [L3 WITH TC] ).
23	Inspect for restriction in the exhaust system and three-way catalytic converter (TWC). Is there any restriction?	Yes	Replace malfunctioning part.
23		No	Go to the next step.
24	Remove and shake the PCV valve. Does the PCV valve rattle?	Yes	Go to the next step.
24	Remove and shake the PCV valve. Does the PCV valve rattle?	No	Replace the PCV valve.
25	Perform the spark test. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Is a strong blue spark visible at each cylinder?	Yes	Go to the next step.
25		No	Inspect or replace the malfunctioning parts, according to the inspection results.
26	Access and monitor the FUEL PRES PID. Is the FUEL_PRES PID value within the specification? (See PCM INSPECTION [L3 WITH TC] .)	Yes	Go to Step 38.
26		No	Go to the next step.
27	Replace the high pressure fuel pump. MONITOR FUEL PRES PID. Is the FUEL_PRES PID value within the specified? (See PCM INSPECTION [L3 WITH TC] .)	Yes	Troubleshooting is completed. Go to Step 37.
27		No	Go to the next step.
28	Inspect the fuel pressure sensor. (See FUEL PRESSURE SENSOR INSPECTION [L3 WITH TC] .) Is the fuel pressure sensor normal?	Yes	Go to the next step.
28		No	Replace the delivery pipe.
29	Connect the fuel pressure gauge between the fuel pump and the high pressure fuel pump. Measure the fuel pressure line of the low pressure side. (See FUEL LINE PRESSURE INSPECTION [L3 WITH TC] .) Is the fuel pressure within the specification?	Yes	Go to the next step.
29		No	Inspect for the following: Fuel line restriction Fuel filter clogging If normal, replace the fuel pump.
30	Inspect the fuel injector for each cylinder. (See FUEL INJECTOR INSPECTION [L3 WITH TC] .) Are the fuel injectors normal?	Yes	Go to the next step.
30		No	Replace the suspected fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION [L3 WITH TC] .)
31	Measure the compression pressure for each cylinder. (See COMPRESSION INSPECTION [L3 WITH TC] .) Are the compression pressures within the specification?	Yes	Replace the injector driver module. If the problem remains, overhaul the engine.
31		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.
32	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.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION	RESULTS	ACTION
1	Inspect air suction in intake-air system components while racing engine to higher speed. Is any air suction?	Yes	Repair or replace as necessary.
1		No	Go to the next step.
2	Perform the self-test function using the M-MDS. Turn the ignition switch to the ON position. Retrieve any DTCs. Is a DTC displayed?	Yes	DTC is displayed: Go to the appropriate DTC test.
2		No	No DTC is displayed: Go to the next step.
3	Access the ECT PID. Start and warm-up engine to normal operating temperature. Is the ECT PID reading below 82°C {180°F}?	Yes	Go to the next step.
3		No	Go to symptom troubleshooting "NO.18 COOLING SYSTEM CONCERNS, RUNS COLD". (See NO.18 COOLING SYSTEM CONCERNS-RUNS COLD [L3 WITH TC] ).
4	Verify the cooling fan operation. Does the cooling fan operate properly according ECT PID value?	Yes	Go to the next step.
4		No	Perform the Cooling Fan Control System Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ).
5	Inspect CMP and CKP sensor for the following; Installation condition (See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION [L3 WITH TC] .) (See CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION [L3 WITH TC] .) 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 inspection results.
5		No	Go to the next step.
6	Access and monitor following the PIDs using the data monitor function. ECT APP MAF CPP (PCM terminal 1D) PNP (PCM terminal 1S) PSP (PCM terminal 2T) Do the PIDs indicate the correct values under trouble condition? (See PCM INSPECTION [L3 WITH TC] .)	Yes	Go to the next step.
6		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 [L3 WITH TC] ).
7	Access and monitor the FUEL PRES PID. Is the FUEL_PRES PID value within the specification? (See PCM INSPECTION [L3 WITH TC] .)	Yes	Go to Step 11.
7		No	Go to the next step.
8	Is the vehicle accelerate performance normally?	Yes	Go to the next step.
8	Is the vehicle accelerate performance normally?	No	Go to Step 10.
9	Inspect the fuel pressure sensor. (See FUEL LINE PRESSURE INSPECTION [L3 WITH TC] .) Is the fuel pressure sensor normal?	Yes	Go to Step 11.
9		No	Replace the delivery pipe.
10	Replace the high pressure fuel pump. Monitor FUEL_PRES PID. Is the FUEL_PRES PID value within the specified? (See PCM INSPECTION [L3 WITH TC] .)	Yes	Troubleshooting is completed. Go to Step 13.
10		No	Go to the next step.
11	Inspect the fuel injector for each cylinder. (See FUEL INJECTOR INSPECTION [L3 WITH TC] .) Are fuel injectors normal?	Yes	Go to the next step.
11		No	Replace the suspected fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION [L3 WITH TC] .)
12	Remove the thermostat and inspection operation. (See THERMOSTAT REMOVAL/INSTALLATION [L3 WITH TC] .) (See THERMOSTAT INSPECTION [L3 WITH TC] .) Is the thermostat normal?	Yes	Inspect and repair or replace the throttle body. If throttle body is normal or the problem remains, replace the injector driver module.
12		No	Replace thermostat.
13	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.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION	RESULTS	ACTION
1	Inspect for the following: Fuel quality (proper octane, contamination, winter/summer blend) Intake-air system restriction or leakage Electrical connectors connection Fuel leakage in fuel system Vacuum leakage Are all items normal?	Yes	Go to the next step.
1		No	Service if necessary. Repeat Step 1.
2	Perform the self-test function using the M-MDS. Turn the ignition switch to the ON position. Retrieve any DTCs. Is a DTC displayed?	Yes	DTC is displayed: Go to the appropriate DTC test. (See DTC TABLE [L3 WITH TC] .)
2		No	No DTC is displayed: Go to the next step.
3	Access the ECT PID. Verify that the ECT PID is less than 116°C {241°F} during driving. Is the ECT PID less than specified?	Yes	Go to the next step.
3		No	The cause of this concern could be from the cooling system overheating. Perform the symptom troubleshooting "NO.17 COOLING SYSTEM CONCERNS - OVERHEATING." (See NO.17 COOLING SYSTEM CONCERNS-OVERHEATING [L3 WITH TC] ).
4	Perform the A/C Cut-off Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the A/C Cut-off Operation work properly?	Yes	Go to the next step.
4		No	Repair or replace the malfunctioning parts according to inspection results.
5	Perform the EGR system operation inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). 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 ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). 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 the to inspection results.
7	Perform the Purge Control System Operation inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the purge solenoid valve work properly?	Yes	Go to the next step.
7		No	Inspect or replace the malfunctioning parts, according to the inspection results.
8	Perform the Variable Valve Timing Control System Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the variable valve timing control system work properly?	Yes	Go to the next step.
8		No	Inspect or replace the malfunctioning parts, according to the inspection results.
9	Inspect CMP and CKP sensor for the following; Installation condition (See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION [L3 WITH TC] .) (See CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION [L3 WITH TC] .) 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.
9		No	Go to the next step.
10	Connect the M-MDS to the DLC-2. Access and monitor following PIDs using the data monitor function. ACSW APP ECT MAF MAP CPP (PCM terminal 1D) PNP (PCM terminal 1S) PSP (PCM terminal 2T) Do the PIDs indicate the correct values under trouble condition? See PCM INSPECTION [L3 WITH TC] .)	Yes	Go to the next step.
10		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 [L3 WITH TC] ).
11	Inspect for restriction in the exhaust system and three-way catalytic converter (TWC). Is there any restriction?	Yes	Replace the malfunctioning part.
11		No	Go to the next step.
12	Remove and shake the PCV valve. Does the PCV valve rattle?	Yes	Go to the next step.
12	Remove and shake the PCV valve. Does the PCV valve rattle?	No	Replace the PCV valve.
13	Perform the spark test. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Is a strong blue spark visible at each cylinder?	Yes	Go to the next step.
13		No	Inspect or replace the malfunctioning parts, according to the inspection results.
14	Access and monitor the FUEL_PRES PID. Is the FUEL_PRES PID value within the specification? (See PCM INSPECTION [L3 WITH TC] .)	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 [L3 WITH TC] .) 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 PCM INSPECTION [L3 WITH TC] .)	Yes	Troubleshooting is completed. Go to Step 21.
17		No	Go to the next step.
18	Connect the fuel pressure gauge between the fuel pump and the high pressure fuel pump. Measure the fuel pressure line of the low pressure side. (See PCM INSPECTION [L3 WITH TC] .) Is the fuel pressure within the specification?	Yes	Go to the next step.
18		No	Inspect for the following: Fuel line restriction Fuel filter clogging If normal replace the fuel pump.
19	Inspect fuel injector for each cylinder. (See FUEL INJECTOR INSPECTION [L3 WITH TC] .) Are the fuel injectors normal?	Yes	Go to the next step.
19		No	Replace the suspected fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION [L3 WITH TC] .)
20	Measure the compression pressure for each cylinder. (See COMPRESSION INSPECTION [L3 WITH TC] .) Are compression pressures within the specification?	Yes	Replace the injector driver module. If the problem remains, overhaul the engine.
20		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.
21	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.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION	RESULTS	ACTION
1	Connect the M-MDS to the DLC. Access the ECT PID. Start and warm-up engine to normal operating temperature. Is ECT PID reading between 82-112°C {180-234°F}?	Yes	Go to the next step.
1		No	ECT PID is higher than 112°C {234°F}: Go to symptom troubleshooting " NO.17 COOLING SYSTEM CONCERNS - OVERHEATING ". ECT PID is less than 82°C {180°F} Go to symptom troubleshooting " NO.18 COOLING SYSTEM CONCERNS - RUNS COLD ".
2	Perform the self-test function using the M-MDS. Turn the ignition switch to the ON position. Retrieve any DTCs. Is a DTC displayed?	Yes	DTC is displayed: Go to the appropriate DTC test. (See DTC TABLE [L3 WITH TC] .)
2		No	No DTC is displayed: Go to the next step.
3	Inspect for leakage in intake-air system. Is there any leakage found?	Yes	Repair or replace for leakage.
3		No	Go to the next step.
4	Perform the TP sweep inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the electronic throttle control system work properly?	Yes	Visually inspect the throttle body (damaged/scratching.) If normal, go to the next step.
4		No	Inspect or replace the malfunctioning parts, according to the inspection results.
5	Connect the M-MDS to the DLC-2. Access and monitor the following PIDs using the data monitor function. ECT APP ACSW CPP (PCM terminal 1D) PNP (PCM terminal 1S) PSP (PCM terminal 2T) Do the PIDs indicate the correct values under trouble condition? (See PCM INSPECTION [L3 WITH TC] .)	Yes	Go to the next step.
5		No	Inspect and repair or replace suspected parts and the related harnesses. If the malfunction remains, perform the intermittent concern troubleshooting. (See INTERMITTENT CONCERN TROUBLESHOOTING [L3 WITH TC] ).
6	Inspect the high pressure fuel pump. (See HIGH PRESSURE FUEL PUMP INSPECTION [L3 WITH TC] .) Is the high pressure fuel pump normal?	Yes	Go to the next step.
6		No	Replace the high pressure fuel pump.
7	Inspect the fuel injector for each cylinder. (See FUEL INJECTOR INSPECTION [L3 WITH TC] .) Are fuel injectors normal?	Yes	Go to the next step.
7		No	Replace the suspected fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION [L3 WITH TC] .)
8	Inspect the operation of cruise control system. Does the cruise control system work properly?	Yes	Inspect and repair or replace the injector driver module or related circuit.
8		No	Repair or replace the malfunctioning part according to inspection results.
9	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.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION	RESULTS	ACTION
1	Does the engine idle rough?	Yes	Go to symptom troubleshooting "NO.8 ENGINE RUNS ROUGH/ROLLING IDLE". (See NO.8 ENGINE RUNS ROUGH/ROLLING IDLE [L3 WITH TC] ).
1	Does the engine idle rough?	No	Go to the next step.
2	Verify the following: Fuel quality (proper octane, contamination, winter/summer blend) Intake-air system restriction or leakage Fuel leakage in fuel system Vacuum leakage Are all items normal?	Yes	Go to the next step.
2		No	Service if necessary. Repeat Step 2.
3	Inspect CMP and CKP sensor for the following; Installation condition (See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION [L3 WITH TC] .) (See CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION [L3 WITH TC] .) 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 inspection results.
3		No	Go to the next step.
4	Perform the self-test function using the M-MDS. Turn the ignition switch to the ON position. Retrieve any DTCs. Is a DTC displayed?	Yes	DTC is displayed: Go to the appropriate DTC test. (See DTC TABLE [L3 WITH TC] .)
4		No	No DTC is displayed: Go to the next step.
5	Connect the M-MDS to the DLC-2. Access and monitor the following PIDs using the data monitor function. ACSW APP BOO ECT MAF TP O2S11 O2S12 LONGFT1 SHTFT1 PSP (PCM terminal 1D) CPP (PCM terminal 1S) PNP (PCM terminal 2T) Do the PIDs indicate the correct values under trouble condition? (See PCM INSPECTION [L3 WITH TC] .)	Yes	Go to the next step.
5		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 [L3 WITH TC] ).
6	Perform the EGR system operation inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the EGR system operate properly?	Yes	Go to the next step.
6		No	Inspect or replace the malfunctioning parts, according to the inspection results.
7	Perform the TP sweep inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the electronic throttle control system work properly?	Yes	Visually inspect the throttle body (damaged/scratching.) If normal, go to the next step.
7		No	Inspect or replace the malfunctioning parts, according to the inspection results.
8	Perform the Purge Control System Operation inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the purge solenoid valve work properly?	Yes	Go to the next step.
8		No	Inspect or replace the malfunctioning parts, according to the inspection results.
9	Perform the A/C Cut-off Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the A/C Cut-off Operation work properly?	Yes	Go to the next step.
9		No	Repair or replace the malfunctioning parts according to inspection results.
10	Access and monitor the FUEL_PRES PID. Is the FUEL_PRES PID value within the specification? (See PCM INSPECTION [L3 WITH TC] .)	Yes	Goto Step 14.
10		No	Go to the next step.
11	Is the vehicle accelerate performance normally?	Yes	Go to the next step.
11	Is the vehicle accelerate performance normally?	No	Go to Step 14.
12	Inspect the fuel pressure sensor. (See FUEL PRESSURE SENSOR INSPECTION [L3 WITH TC] .) Is the fuel pressure sensor normal?	Yes	Go to Step 14.
12		No	Replace the delivery pipe.
13	Replace the high pressure fuel pump Monitor FUEL_PRES PID. Is the FUEL_PRES PID value within the specified? (See PCM INSPECTION [L3 WITH TC] .)	Yes	Troubleshooting is completed. Go to the Step 17.
13		No	Go to the next step.
14	Connect the fuel pressure gauge between the fuel pump and the high pressure fuel pump. Measure the fuel pressure line of the low pressure side. (See FUEL LINE PRESSURE INSPECTION [L3 WITH TC] .) Is the fuel pressure within the specification?	Yes	Go to the next step.
14		No	Inspect for the following: Fuel line restriction Fuel filter clogging If normal replace the fuel pump.
15	Inspect the fuel injector for each cylinder. (See FUEL INJECTOR INSPECTION [L3 WITH TC] .) Are fuel injectors normal?	Yes	Go to the next step.
15		No	Replace the suspected fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION [L3 WITH TC] .)
16	Measure the compression pressure for each cylinder. (See COMPRESSION INSPECTION [L3 WITH TC] .) Are compression pressures within the specification?	Yes	Replace the injector driver module. If the problem remains, overhaul the engine.
16		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.
17	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.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION	RESULTS	ACTION
1	Inspect for the following: Fuel quality (proper octane, contamination, winter/summer blend) Air leakage from intake-air system Intake-air system restriction Air cleaner element Clutch slippage Fuel leakage from fuel line Vacuum leakage Are all items normal?	Yes	Go to the next step.
1		No	Service if necessary. Repeat Step 1.
2	Perform the self-test function using the M-MDS. Turn the ignition switch to the ON position. Retrieve any DTCs. Is a DTC displayed?	Yes	DTC is displayed: Go to the appropriate DTC test. (See DTC TABLE [L3 WITH TC] .)
2		No	No DTC is displayed: Go to the next step.
3	Access the ECT PID. Verify that the ECT PID is less than 116°C {241°F} during driving. Is the ECT PID less than specified?	Yes	Go to the next step.
3		No	The cause of this concern could be from the cooling system overheating. Perform the symptom troubleshooting "NO.17 COOLING SYSTEM CONCERNS - OVERHEATING." (See NO.17 COOLING SYSTEM CONCERNS-OVERHEATING [L3 WITH TC] ).
4	Perform the Main Relay Operation Inspection with wiggle the related harness. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the main relay operate properly?	Yes	Go to the next step.
4		No	Repair or replace for the intermittent fault.
5	Inspect CMP and CKP sensor for the following; Installation condition (See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION [L3 WITH TC] .) (See CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION [L3 WITH TC] .) 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.
5		No	Go to the next step.
6	Connect the M-MDS to DLC-2. Access and monitor following PIDs using the data monitor function while wiggle the harness and under trouble condition. APP ECT MAF IAT IAT2 MAP FP VSS O2S11 O2S12 LONGFT1 SHTFT1 CPP (PCM terminal 1S) PNP (PCM terminal 2T) Do the PIDs indicate correct values? See PCM INSPECTION [L3 WITH TC] .)	Yes	Go to the Step 13.
6		No	Inspect and repair or replace suspected parts and related harnesses. If the malfunction remains, perform the intermittent concern troubleshooting. (See INTERMITTENT CONCERN TROUBLESHOOTING [L3 WITH TC] ). If the MAP PID remains without specified, go to the next step.
7	Perform the EGR system operation inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does EGR system operate properly?	Yes	Go to the next step.
7		No	Inspect or replace the malfunctioning parts, according to the inspection results.
8	Perform the A/C Cut-off Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the A/C Cut-off Operation work properly?	Yes	Go to the next step.
8		No	Repair or replace malfunctioning parts, according to inspection results.
9	Perform the TP sweep inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the electronic throttle control system work properly?	Yes	Visually inspect the throttle body (damaged/scratching.) If normal, go to the next step.
9		No	Inspect or replace the malfunctioning parts, according to the inspection results.
10	Perform the Variable Swirl Control System Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the variable swirl system work properly?	Yes	Go to the next step.
10		No	Inspect or replace the malfunctioning parts, according to the inspection results.
11	Perform the Purge Control System Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the purge control system work properly?	Yes	Go to the next step.
11		No	Inspect or replace the malfunctioning parts, according to the inspection results.
12	Perform the Fuel Pump Speed Control Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the fuel pump speed control work properly?	Yes	Go to the next step.
12		No	Inspect or replace the malfunctioning parts, according to the inspection results.
13	Perform the Wastegate Control System Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the wastegate control system work properly?	Yes	Go to the next step.
13		No	Inspect or replace the malfunctioning parts, according to the inspection results.
14	Remove the parts necessary to inspect turbocharger without remove the turbocharger. Inspect if turbocharger compressor wheel is bent, damaged, or interfering with housing on vehicle. (See TURBOCHARGER INSPECTION [L3 WITH TC] .) Is there any problem?	Yes	Replace the turbocharger.
14		No	Go to the next step.
15	Inspect the turbocharger compressor wheel locknut is loose or has fallen down inside turbocharger. Is there any problem?	Yes	Replace the turbocharger.
15		No	Go to the next step.
16	Inspect if turbocharger compressor wheel by hand. Does the wheel turn easily and smoothly?	Yes	Go to the next step.
16		No	Replace the turbocharger.
17	Inspect the turbocharger turbine wheel is damaged, cracked or interfering with housing on vehicle. NOTE: Inspect all fins on each turbine wheel. Is there any problem?	Yes	Replace the turbocharger.
17		No	Go to the next step.
18	Is any engine oil found inside turbocharger turbine housing?	Yes	Excessive amount of oil is found: Replace the turbocharger. Small amount of oil is found: Wipe oil out of vehicle, then go to the next step.
18		No	Go to the next step.
19	Is any engine oil found inside turbocharger compressor housing?	Yes	Wipe oil out vehicle and install all removed parts in Step 14. Then, go to the next step.
19		No	Turbocharger is normal. Install all parts removed in Step 14. Then, go to the next step.
20	Inspect for restriction in the exhaust system and three-way catalytic converter (TWC). Is there any restriction?	Yes	Replace the malfunctioning part.
20		No	Go to the next step.
21	Remove and shake the PCV valve. Does the PCV valve rattle?	Yes	Go to the next step.
21	Remove and shake the PCV valve. Does the PCV valve rattle?	No	Replace the PCV valve.
22	Perform the spark test. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Is a strong blue spark visible at each cylinder?	Yes	Go to the next step.
22		No	Inspect or replace the malfunctioning parts, according to the inspection results.
23	Access and monitor the FUEL_PRES PID. Is the FUEL_PRES PID value within the specification? (See PCM INSPECTION [L3 WITH TC] .)	Yes	Go to Step 27.
23		No	Go to the next step.
24	Is the vehicle accelerate performance normally?	Yes	Go to the next step.
24	Is the vehicle accelerate performance normally?	No	Go to Step.26.
25	Inspect the fuel pressure sensor. (See FUEL PRESSURE SENSOR INSPECTION [L3 WITH TC] .) Is the fuel pressure sensor normal?	Yes	Go to the Step 27.
25		No	Replace the delivery pipe.
26	Replace the high pressure fuel pump. Monitor FUEL_PRES PID. Is the FUEL_PRES PID value within the specified? (See PCM INSPECTION [L3 WITH TC] .)	Yes	Troubleshooting is completed. Go to Step 30.
26		No	Go to the next step.
27	Connect the fuel pressure gauge between the fuel pump and the high pressure fuel pump. Measure the fuel pressure line of the low pressure side. (See FUEL LINE PRESSURE INSPECTION [L3 WITH TC] .) Is the fuel pressure with in the specification?	Yes	Go to the next step.
27		No	Inspect for the following: Fuel line restriction Fuel filter clogging If normal replace the fuel pump.
28	Inspect the fuel injector for each cylinder. (See FUEL INJECTOR INSPECTION [L3 WITH TC] .) Are fuel injectors normal?	Yes	Go to the next step.
28		No	Replace the suspected fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION [L3 WITH TC] .)
29	Measure the compression pressure for each cylinder. (See COMPRESSION INSPECTION [L3 WITH TC] .) Are compression pressures within the specification?	Yes	Replace the injector driver module. If the problem remains, overhaul the engine.
29		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.
30	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.

NOTE
Inspect all fins on each turbine wheel.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION	RESULTS	ACTION
1	Verify the following: Fuel quality (proper octane, contamination, winter/summer blend) Air cleaner restriction or dirty Intake-air system restriction or leakage Charge air cooler condition (restriction or damaged) Turbocharger compressor-to-intake manifold duct loose connection Leakage at exhaust manifold or turbocharger mounting flange Vacuum leakage Clutch slippage Brake dragging Are all items normal?	Yes	Go to the next step.
1		No	Service if necessary. Repeat Step 1.
2	Perform the self-test function using the M-MDS. Turn the ignition switch to the ON position. Retrieve any DTCs. Is a DTC displayed?	Yes	DTC is displayed: Go to the appropriate DTC test. (See DTC TABLE [L3 WITH TC] .)
2		No	No DTC is displayed: Go to the next step.
3	Is the engine overheating?	Yes	Go to symptom troubleshooting "NO.17 COOLING SYSTEM CONCERN-OVERHEATING." (See NO.17 COOLING SYSTEM CONCERNS-OVERHEATING [L3 WITH TC] ).
3	Is the engine overheating?	No	Go to the next step.
4	Perform the EGR system operation inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the EGR system operate properly?	Yes	Go to the next step.
4		No	Inspect or replace the malfunctioning parts, according to the inspection results.
5	Perform the A/C Cut-off Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the A/C Cut-off Operation work properly?	Yes	Go to the next step.
5		No	Repair or replace malfunctioning parts, according to the inspection results.
6	Perform the TP sweep inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the variable swirl system work properly?	Yes	Visually inspect 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 ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ).	Yes	Go to the next step.
7		No	Inspect or replace the malfunctioning parts, according to the inspection results.
8	Perform the Variable Valve Timing Control System Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the variable valve timing control 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 Purge Control System Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the purge control system work properly?	Yes	Go to the next step.
9		No	Inspect or replace the malfunctioning parts, according to the inspection results.
10	Perform Fuel Pump Speed Control Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the fuel pump speed control work properly?	Yes	Go to the next step.
10		No	Inspect or replace the malfunctioning parts, according to the inspection results.
11	Perform the Wastegate Control System Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the wastegate control system work properly?	Yes	Go to the next step.
11		No	Inspect or replace the malfunctioning parts, according to the inspection results.
12	Connect the M-MDS to DLC-2. Access and monitor following PIDs using the data monitor function. ECT MAF IAT IAT2 APP TP MAP FP (Low side pressure line) VSS Do the PIDs indicate correct values under trouble condition? See PCM INSPECTION [L3 WITH TC] .)	Yes	Go to the next step.
12		No	Inspect and repair or replace suspected parts and related harnesses. If the malfunction remains, perform the intermittent concern troubleshooting procedure. (See INTERMITTENT CONCERN TROUBLESHOOTING [L3 WITH TC] ).
13	Inspect CMP and CKP sensor for following; Installation condition (See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION [L3 WITH TC] .) (See CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION [L3 WITH TC] .) Damaged trigger wheel and camshaft Open or short circuit in wiring harnesses Is there any malfunction detected?	Yes	Repair or replace the malfunctioning part according to the inspection results.
13		No	Go to the next step.
14	Remove and shake PCV valve. Does the PCV valve rattle?	Yes	Go to the next step.
14	Remove and shake PCV valve. Does the PCV valve rattle?	No	Replace the PCV valve.
15	Inspect spark plug condition. Is spark plug wet, covered with carbon or grayish white?	Yes	Spark plug is wet or covered with carbon: Perform the Spark Test and repair or replace malfunctioning part according to inspection result. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Spark plug is grayish white: Go to Step 23.
15		No	Install spark plugs on original cylinders. Go to the next step.
16	Inspect for restriction in exhaust system and three-way catalytic converter (TWC). Is there any restriction?	Yes	Replace malfunctioning part.
16		No	Go to the next step.
17	Remove parts necessary to inspect turbocharger without remove the turbocharger. Inspect if turbocharger compressor wheel is bent, damaged, or interfering with housing on vehicle. (See TURBOCHARGER INSPECTION [L3 WITH TC] .) Is there any problem?	Yes	Replace turbocharger.
17		No	Go to the next step.
18	Inspect turbocharger compressor wheel locknut is loose or has fallen down inside turbocharger. Is there any problem?	Yes	Replace turbocharger.
18		No	Go to the next step.
19	Inspect if turbocharger compressor wheel by hand. Does wheel turn easily and smoothly?	Yes	Go to the next step.
19		No	Replace turbocharger.
20	Inspect turbocharger turbine wheel is damaged, cracked or interfering with housing on vehicle. NOTE: Inspect all fins on each turbine wheel. Is there any problem?	Yes	Replace turbocharger.
20		No	Go to the next step.
21	Is any engine oil found inside turbocharger turbine housing?	Yes	Excessive amount of oil is found: Replace turbocharger. Small amount of oil is found: Wipe oil out of vehicle, then Go to the next step.
21		No	Go to the next step.
22	Is any engine oil found inside turbocharger compressor housing?	Yes	Wipe oil out vehicle and install all removed parts in Step 16. Then, Go to the next step.
22		No	Turbocharger is normal. Install all parts removed in Step 17. Then, Go to the next step.
23	Inspect for leakage in fuel line. Is there any fuel leakage found?	Yes	Repair or replace suspected part.
23		No	Go to the next step.
24	Access and monitor FUEL_PRES PID. Is the FUEL_PRES PID value within the specification? (See PCM INSPECTION [L3 WITH TC] .)	Yes	Go to Step 27.
24		No	Go to the next step.
25	Replace the high pressure fuel pump. Monitor FUEL PRES PID. Is the FUEL_PRES PID value within the specified? (See PCM INSPECTION [L3 WITH TC] .)	Yes	Troubleshooting is completed. Go to Step 30.
25		No	Go to the next step.
26	Inspect the fuel pressure sensor. (See FUEL PRESSURE SENSOR INSPECTION [L3 WITH TC] .) Is the fuel pressure sensor normal?	Yes	Go to the next step.
26		No	Replace the delivery pipe.
27	Connect the fuel pressure gauge between fuel pump and high pressure fuel pump. Measure the fuel pressure line of the low pressure side. (See FUEL LINE PRESSURE INSPECTION [L3 WITH TC] .) Is the fuel pressure within the specification?	Yes	Go to the next step.
27		No	Inspect for the following: Fuel line restriction Fuel filter clogging If normal replace the fuel pump.
28	Inspect fuel injector for each cylinder. (See FUEL INJECTOR INSPECTION [L3 WITH TC] .) Are fuel injectors normal?	Yes	Go to the next step.
28		No	Replace suspected fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION [L3 WITH TC] .)
29	Measure compression pressure for each cylinder. (See COMPRESSION INSPECTION [L3 WITH TC] .) Are compression pressures within the specification?	Yes	Replace the injector driver module. If the problem remains, overhaul the engine.
29		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.
30	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.

NOTE
Inspect all fins on each turbine wheel.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION	RESULTS	ACTION
1	Connect the M-MDS to the DLC-2. Access the ECT PID. Verify that the ECT PID is less than 116°C {241°F} during driving. Is ECT PID less than specified?	Yes	Go to the next step.
1		No	The cause of this concern could be from the cooling system overheating. Perform the symptom troubleshooting "NO.17 COOLING SYSTEM CONCERNS - OVERHEATING." (See NO.17 COOLING SYSTEM CONCERNS-OVERHEATING [L3 WITH TC] ).
2	Inspect for the following: Air leakage or restriction from intake-air system Fuel quality (proper octane, contamination, winter/summer blend) Exhaust system and/or three-way catalytic converter (TWC) restriction Charge air cooler condition (restriction or damaged) Are all items normal?	Yes	Go to the next step.
2		No	Service if necessary. Repeat Step 2.
3	Perform the self-test function using the M-MDS. Turn the ignition switch to the ON position. Retrieve any DTCs. Is a DTC displayed?	Yes	DTC is displayed: Go to the appropriate DTC test. (See DTC TABLE [L3 WITH TC] .)
3		No	No DTC is displayed: Go to the next step.
4	Inspect the knock sensor. (See KNOCK SENSOR (KS) INSPECTION [L3 WITH TC] .) Is the knock sensor normal?	Yes	Go to the next step.
4		No	Replace the knock sensor. (See KNOCK SENSOR (KS) INSPECTION [L3 WITH TC] .)
5	Perform the EGR system operation inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). 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 ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). 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 ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). 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 ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the wastegate control 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 spark test. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Is a strong blue spark visible at each cylinder?	Yes	Go to the next step.
9		No	Inspect or replace the malfunctioning parts, according to the inspection results.
10	Inspect CMP and CKP sensor for the following; Installation condition (See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION [L3 WITH TC] .) (See CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION [L3 WITH TC] .) 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.
10		No	Go to the next step.
11	Connect the M-MDS to the DLC-2. Access and monitor the following PIDs using the data monitor function. ECT MAF IAT IAT2 APP TP MAP Do the PIDs indicate correct values under trouble condition? See PCM INSPECTION [L3 WITH TC] .)	Yes	Go to the next step.
11		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 [L3 WITH TC] ).
12	Access and monitor FUEL_PRES PID. Is the FUEL_PRES PID value within the specification? (See PCM INSPECTION [L3 WITH TC] .)	Yes	Go to Step 16.
12		No	Go to the next step.
13	Is the vehicle accelerate performance normally?	Yes	Go to the next step.
13	Is the vehicle accelerate performance normally?	No	Go to the Step 15.
14	Inspect the fuel pressure sensor. (See FUEL PRESSURE SENSOR INSPECTION [L3 WITH TC] .) Is the fuel pressure sensor normal?	Yes	Go to Step 16.
14		No	Replace the delivery pipe.
15	Replace the high pressure fuel pump. Monitor FUEL_PRES PID. Is the FUEL_PRES PID value within the specified? (See FUEL PRESSURE SENSOR INSPECTION [L3 WITH TC] .)	Yes	Troubleshooting is completed. Go to Step 17.
15		No	Go to the next step.
16	Measure compression pressure for each cylinder. (See COMPRESSION INSPECTION [L3 WITH TC] .) Are compression pressure within the specified?	Yes	Inspect fuel injector for each cylinder. (See FUEL INJECTOR INSPECTION [L3 WITH TC] .)
16		No	Inspect 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 as necessary.
17	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.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION	RESULTS	ACTION
1	Inspect for the following: Air cleaner element for contamination Intake-air system restriction Fuel quality (proper octane, contamination, winter/summer blend) Coolant level Brake dragging Clutch slippage Charge air cooler condition (restriction or damaged) Vacuum leakage Fuel leakage MAF sensor contaminated Exhaust system and/or three-way catalytic converter restriction Are all items normal?	Yes	Go to the next step.
1		No	Service if necessary. Repeat Step 1.
2	Perform the self-test function using the M-MDS. Turn the ignition switch to the ON position. Retrieve any DTCs. Is a DTC displayed?	Yes	DTC is displayed: Go to the appropriate DTC test. (See DTC TABLE [L3 WITH TC] .)
2		No	No DTC is displayed: Go to the next step.
3	Perform the Cooling Fan Control System Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the EGR system operate properly?	Yes	Go to the next step.
3		No	Inspect or replace the malfunctioning parts, according to the inspection results.
4	Perform the EGR system operation inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the EGR system operate properly?	Yes	Go to the next step.
4		No	Inspect or replace the malfunctioning parts, according to the inspection results.
5	Perform the Variable Swirl Control System Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the variable swirl system work properly?	Yes	Go to the next step.
5		No	Inspect or replace the malfunctioning parts, according to the inspection results.
6	Perform the Wastegate Control System Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the wastegate control system work properly?	Yes	Go to the next step.
6		No	Inspect or replace the malfunctioning parts, according to the inspection results.
7	Perform the A/C Cut-off Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the A/C Cut-off Operation work properly?	Yes	Go to the next step.
7		No	Repair or replace malfunctioning parts, according to the inspection results.
8	Remove and shake the PCV valve. Does the PCV valve rattle?	Yes	Go to the next step.
8	Remove and shake the PCV valve. Does the PCV valve rattle?	No	Replace the PCV valve.
9	Perform the spark test. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Is the strong blue spark visible at each cylinder?	Yes	Go to the next step.
9		No	Inspect or replace the malfunctioning parts, according to the inspection results.
10	Inspect CMP and CKP sensor for the following; Installation condition (See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION [L3 WITH TC] .) (See CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION [L3 WITH TC] .) 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.
10		No	Go to the next step.
11	Connect the M-MDS to the DLC-2. Access and monitor following PIDs using the data monitor function. ECT MAF IAT IAT2 APP TP CPP (PCM terminal 1D) PNP (PCM terminal 1S) MAP VSS Do the PIDs indicate the correct values according to the engine operating condition? (See PCM INSPECTION [L3 WITH TC] .)	Yes	Go to the next step.
11		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 [L3 WITH TC] ).
12	Access and monitor the FUEL_PRES PID. Is the FUEL_PRES PID value within the specification? (See PCM INSPECTION [L3 WITH TC] .)	Yes	Go to Step 16.
12		No	Go to the next step.
13	Is the vehicle accelerate performance normally?	Yes	Go to the next step.
13	Is the vehicle accelerate performance normally?	No	Go to Step 15.
14	Inspect the fuel pressure sensor. (See FUEL PRESSURE SENSOR INSPECTION [L3 WITH TC] .) Is the fuel pressure sensor normal?	Yes	Go to Step 16.
14		No	Replace the delivery pipe.
15	Replace the high pressure fuel pump. Monitor FUEL_PRES PID. Is the FUEL_PRES PID value within the specified? (See PCM INSPECTION [L3 WITH TC] .)	Yes	Troubleshooting is completed. Go to Step 19.
15		No	Go to the next step.
16	Inspect the turbocharger. (See TURBOCHARGER INSPECTION [L3 WITH TC] .) Is there any problem in turbocharger?	Yes	Replace the turbocharger.
16		No	Go to the next step.
17	Inspect the fuel injector for each cylinder. (See FUEL INJECTOR INSPECTION [L3 WITH TC] .) Are fuel injectors normal?	Yes	Go to the next step.
17		No	Replace the suspected fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION [L3 WITH TC] .)
18	Measure the compression pressure for each cylinder. (See COMPRESSION INSPECTION [L3 WITH TC] .) Are compression pressures within the specification?	Yes	Replace the injector driver module. If the problem remains, overhaul the engine.
18		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.
19	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.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION	RESULTS	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 M-MDS to the DLC. Perform the self-test function using the M-MDS. 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 ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). 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 ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). 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 ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). 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 ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the wastegate control system work properly?	Yes	Go to the next step.
8		No	Inspect or replace the malfunctioning parts, according to the inspection results.
9	Remove and shake the PCV valve. Does the PCV valve rattle?	Yes	Go to the next step.
9	Remove and shake the PCV valve. Does the PCV valve rattle?	No	Replace the PCV valve.
10	Perform the spark test. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Is a strong blue spark visible at each cylinder?	Yes	Go to the next step.
10		No	Inspect or replace the malfunctioning parts, according to the inspection results.
11	Inspect CMP and CKP sensor for the following; Installation condition (See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION [L3 WITH TC] .) (See CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION [L3 WITH TC] .) 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.
11		No	Go to the next step.
12	Connect the M-MDS 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 1D) PNP (PCM terminal 1S) Do the PIDs indicate the correct values according to the engine operating condition? See PCM INSPECTION [L3 WITH TC] .)	Yes	Go to the next step.
12		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 [L3 WITH TC] ).
13	Access and monitor the FUEL_PRES PID. Is the FUEL_PRES PID value within the specification? (See PCM INSPECTION [L3 WITH TC] .)	Yes	Go to Step 18.
13		No	Go to the next step.
14	Is the vehicle accelerate performance normally?	Yes	Go to the next step.
14	Is the vehicle accelerate performance normally?	No	Go to Step 17.
15	Inspect the fuel pressure sensor. (See FUEL PRESSURE SENSOR INSPECTION [L3 WITH TC] .) Is the fuel pressure sensor normal?	Yes	Go to Step 18.
15		No	Replace the delivery pipe.
16	Replace the high pressure fuel pump. Monitor FUEL_PRES PID. Is the FUEL_PRES PID value within the specified? (See PCM INSPECTION [L3 WITH TC] .)	Yes	Troubleshooting is completed. Go to Step 22.
16		No	Go to the next step.
17	Inspect the turbocharger. (See TURBOCHARGER INSPECTION [L3 WITH TC] .) Is there any problem in turbocharger?	Yes	Replace the turbocharger.
17		No	Go to the next step.
18	Inspect the three-way catalytic converter (TWC). Is the TWC normal?	Yes	Go to the next step.
18		No	Replace the TWC.
19	Inspect the fuel injector for each cylinder. (See FUEL INJECTOR INSPECTION [L3 WITH TC] .) Are fuel injectors normal?	Yes	Go to the next step.
19		No	Replace the suspected fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION [L3 WITH TC] .)
20	Measure the compression pressure for each cylinder. (See COMPRESSION INSPECTION [L3 WITH TC] .) Are compression pressures within the specification?	Yes	Replace the injector driver module. If the problem remains, overhaul the engine.
20		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.
21	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.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION	RESULTS	ACTION
1	Remove and shake the PCV valve. Does the PCV valve rattle?	Yes	Go to the next step.
1	Remove and shake the PCV valve. Does the PCV valve rattle?	No	Replace the PCV valve.
2	Verify the following: Proper dipstick Proper engine viscosity Engine oil level Are all items normal?	Yes	Go to the next step.
2		No	Service if necessary. Repeat Step 2.
3	Inspect the oil leakage from outside of the engine. Is there any oil leakage found?	Yes	Repair or replace oil leakage part.
3		No	Go to the next step.
4	Remove the parts to necessary to inspect turbocharger without remove the turbocharger. Visually inspect for the oil leakage inside turbocharger compressor and turbine housing. Is any engine oil found inside turbocharger compressor or turbine housing?	Yes	Excessive amount of oil is found: Replace the turbocharger. Small amount of oil is found: Wipe oil out of vehicle, then go to the next step.
4		No	Go to the next step.
5	Is any engine oil found around oil pipes attached on turbocharger center housing?	Yes	If oil leaks from damaged pipe, replace oil pipe. Install the removed parts at Step 4.
5		No	Inspect internal engine parts such as valves, valve guides, valve stem seals, cylinder head drain passage, and piston rings. Then install the removed parts at Step 4.
6	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.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION	RESULTS	ACTION
1	Inspect for the following: Engine coolant level Coolant leakage (around heater unit in passenger compartment, coolant hoses and/or radiator.) Water and anti-freeze mixture Radiator condition Collapsed or restricted radiator hoses Radiator pressure cap Coolant overflow system Fan rotational direction Fan rotation direction Fuses Are all items normal?	Yes	Go to the next step.
1		No	Service if necessary. Repeat Step 1. Service if necessary.
2	Connect the M-MDS to the DLC-2. Turn the ignition switch to the ON position (Engine off). Retrieve any DTCs. Is there any DTCs displayed?	Yes	DTC is displayed: Go to appropriate DTC test.
2		No	No DTC is displayed: Go to the next step.
3	Perform the KOEO and KOER self-test function using the M-MDS. (See KOEO/KOER SELF TEST [L3 WITH TC] .) Is there any DTCs displayed?	Yes	DTC is displayed: Go to appropriate DTC test.
3		No	No DTC is displayed: Go to the next step.
4	Start the engine and run it at idle speed. Turn the A/C switch off. Does the A/C compressor disengaged?	Yes	Go to the next step.
4		No	Go to symptom troubleshooting "NO.24 A/C ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY." (See NO.24 A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY [L3 WITH TC] ).
5	Perform the Cooling Fan Control System Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the cooling fan system operate properly?	Yes	Go to the next step.
5		No	Repair or replace malfunctioning part, according to inspection results.
6	Is the drive belt normal?	Yes	Go to the next step.
6	Is the drive belt normal?	No	Replace the drive belt.
7	Is there any leakage around heater unit in passenger compartment?	Yes	Inspect and service heater unit for leakage.
7		No	Go to the next step.
8	Is there any leakage at coolant hoses and/or radiator?	Yes	Replace the malfunctioning part.
8	Is there any leakage at coolant hoses and/or radiator?	No	Go to the next step.
9	Cool down the engine. Remove the thermostat and inspect operation. (See THERMOSTAT REMOVAL/INSTALLATION [L3 WITH TC] .) (See THERMOSTAT INSPECTION [L3 WITH TC] .) Is thermostat normal?	Yes	Thermostat is normal. Inspect the cylinder block for leakage or blockage.
9		No	Access the ECT PID using the M-MDS. Inspect for both ECT PID and temperature gauge readings. If the temperature gauge on instrument cluster indicates normal but ECT PID is not same as temperature gauge reading, inspect the ECT sensor. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). If the temperature gauge on instrument cluster indicates overheating but ECT PID is normal, inspect the instrument cluster. (See INSTRUMENT CLUSTER INSPECTION .)
10	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.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION	RESULTS	ACTION
1	Is customer complaint "Lack of passenger compartment heat" only?	Yes	Inspect the A/C heater system.
1		No	Go to the next step.
2	Does the engine speed continue at fast idle?	Yes	Go to symptom troubleshooting "NO.9 FAST IDLE/RUNS ON." (See NO.9 FAST IDLE/RUNS ON [L3 WITH TC] ).
2	Does the engine speed continue at fast idle?	No	Go to the next step.
3	Cool down the engine. Remove the thermostat and inspect operation. (See THERMOSTAT REMOVAL/INSTALLATION [L3 WITH TC] .) (See THERMOSTAT INSPECTION [L3 WITH TC] .) Is thermostat normal?	Yes	Go to the next step.
3		No	Replace the thermostat.
4	Perform the Cooling Fan Control System Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Does the cooling fan system operate properly?	Yes	Access the ECT PID using the M-MDS. Inspect for both ECT PID and temperature gauge readings. If the temperature gauge on instrument cluster indicates normal but ECT PID is not same as temperature gauge reading, inspect the ECT sensor. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [L3 WITH TC] .) If the temperature gauge on instrument cluster indicates overheating but ECT PID is normal, inspect the instrument cluster. (See INSTRUMENT CLUSTER INSPECTION .)
4		No	Repair or replace malfunctioning part, according to inspection results.
5	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.

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 the Step 5.
		Black	Rich fuel mixture is indicating. Go to the Step 6.
2	Remove and shake the PCV valve. Does the PCV valve rattle?	Yes	Go to the next step.
2	Remove and shake the PCV valve. Does the PCV valve rattle?	No	Replace the PCV valve.
3	Remove the parts necessary to inspect turbocharger without remove the turbocharger. Visually inspect for the turbocharger compressor housing. Is any engine oil found inside turbocharger compressor housing?	Yes	Install all parts removed in this step. Perform the following, according to inspection results. Excessive amount of oil is found: Replace the turbocharger. Small amount of oil is found: Wipe oil out of vehicle, then Go to the next step.
3		No	Turbocharger is normal. Install all parts removed in this step. Then, Go to the next step.
4	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 Are there ant problem found?	Yes	Repair or replace suspected parts, according to the inspection results.
4		No	Engine internal parts are normal. If other driveability symptoms are present, return to diagnostic index to service additional symptoms.
5	Does cooling system hold the coolant pressure? (See COOLING SYSTEM CAP INSPECTION [L3 WITH TC] .)	Yes	Inspect for the following: Cylinder head gasket leakage Intake manifold gasket leakage Cracked or porous engine block If other driveability symptoms are present, return to diagnostic index to service additional symptoms.
5		No	Inspect for the cause.
6	Inspect for the following for intake-air system. Air cleaner restriction Collapsed or restricted Leakage Are all items normal?	Yes	Go to the next step.
6		No	Repair or replace the suspected part.
7	Connect the M-MDS to the DLC-2. Access following PIDs. ECT MAF IAT IAT2 APP TP MAP VSS O2S11 O2S12 LONGFT1 SHTFT1 PNP (PCM terminal 1S) CPP (PCM terminal 1D) Monitor the PIDs under the black smoke appeared engine condition. Do all PID indicate normal according to engine conditions?	Yes	Go to the next step.
7		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 [L3 WITH TC] ).
8	Inspect the wastegate. (See WASTEGATE ACTUATOR INSPECTION [L3 WITH TC] .) Does the wastegate stuck open?	Yes	Perform the wastegate control system operation inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Repair or replace malfunctioning part according to the inspection results.
8		No	Go to the next step.
9	Connect the M-MDS to DLC-2. Access and monitor following PIDs using the data monitor function. ECT MAF IAT IAT2 APP TP MAP VSS CPP (PCM terminal 1D) PNP (PCM terminal 1S) O2S11 O2S12 LONGFT1 SHTFT1 Do the PIDs indicate correct values under trouble condition? (See PCM INSPECTION [L3 WITH TC] .)	Yes	Goto next step
9		No	Inspect and repair or replace suspected parts and related harnesses. If the malfunction remains, perform the intermittent concern troubleshooting procedure. (See INTERMITTENT CONCERN TROUBLESHOOTING [L3 WITH TC] ).
10	Access and monitor the FUEL_PRES PID. Is the FUEL_PRES PID value within the specification? (See PCM INSPECTION [L3 WITH TC] .)	Yes	Goto Step 14.
10		No	Go to the next step.
11	Is vehicle accelerate performance normally?	Yes	Go to the next step.
11	Is vehicle accelerate performance normally?	No	Go to Step 13.
12	Inspect the fuel pressure sensor. (See FUEL PRESSURE SENSOR INSPECTION [L3 WITH TC] .) Is the fuel pressure sensor normal?	Yes	Go to Step 14.
12		No	Replace the delivery pipe.
13	Replace the high pressure fuel pump. Monitor FUEL PRES PID. Is the FUEL_PRES PID value within the specified? (See PCM INSPECTION [L3 WITH TC] .)	Yes	Troubleshooting is completed. Retest Step 16.
13		No	Go to the next step.
14	Perform the spark test. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Is a strong blue spark visible at each cylinder?	Yes	Go to the next step.
14		No	Inspect or replace the malfunctioning parts, according to the inspection results.
15	Measure the compression pressure for each cylinder. (See COMPRESSION INSPECTION [L3 WITH TC] .) Are compression pressures within the specification?	Yes	Inspect the fuel injector for each cylinder. (See FUEL INJECTOR INSPECTION [L3 WITH TC] .)
15		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.
16	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.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION	RESULTS	ACTION
1	Visually inspect fuel leakage at fuel line. Is there any fuel leakage?	Yes	Service if necessary.
1		No	Go to the next step.
2	Inspect the vacuum hose routine. (See VACUUM HOSE ROUTING DIAGRAM [L3 WITH TC] .) Are vacuum hoses routines properly?	Yes	Go to the next step.
2		No	Reconnect the vacuum hose.
3	Perform the Evaporative Emission (EVAP) System Leak Inspection. Is there any problem found?	Yes	Repair or replace suspected part according to the inspection results.
3		No	Go to the next step.
4	Inspect the airflow of purge solenoid valve. (See PURGE SOLENOID VALVE INSPECTION [L3 WITH TC] .) Is the purge solenoid airflow properly?	Yes	Go to the next step.
4		No	Replace the purge solenoid valve.
5	Connect the M-MDS to the DLC-2. Access the FUEL_PRESPID. Monitor the FUEL_PRES PID while idle and race the engine. Is the FUEL_PRES PID indicate 15 MPa {153 kgf/cm 2 , 2175 psi} or less?	Yes	Inspect the charcoal canister for fuel saturation. If excess amount of liquid fuel is present, replace the charcoal canister.
5		No	Inspect the fuel pressure sensor and the high pressure fuel pump. (See FUEL PRESSURE SENSOR INSPECTION [L3 WITH TC] .) (See HIGH PRESSURE FUEL PUMP INSPECTION [L3 WITH TC] .)
6	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.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION	RESULTS	ACTION
1	Is the noise from the turbocharger?	Yes	Go to Step 8.
1	Is the noise from the turbocharger?	No	Go to the next step
2	Is squeal, click or chirp sound present?	Yes	Inspect the engine oil level, solenoid valves installation or drive belt tension.
2	Is squeal, click or chirp sound present?	No	Go to the next step.
3	Is rumble or grinding sound present?	Yes	Inspect and repair the following; Drive belt tension Loose parts in engine compartment Power steering system fluid level If normal, perform the power steering fluid line air bleed.
3	Is rumble or grinding sound present?	No	Go to the next step.
4	Is rattle sound present?	Yes	Inspect the location of rattle for loose parts.
4	Is rattle sound present?	No	Go to the next step.
5	Is hiss sound present?	Yes	Inspect and repair the following; Vacuum leakage Spark plug looseness Intake-air system leakage
5	Is hiss sound present?	No	Go to the next step.
6	Is rap or roar sound present?	Yes	Inspect the exhaust system or loose parts.
6	Is rap or roar sound present?	No	Go to the next step.
7	Is knocking noise present?	Yes	Go to symptom troubleshooting "NO.13 KNOCKING/PINGING". (See NO.13 KNOCKING/PINGING [L3 WITH TC] ).
7	Is knocking noise present?	No	If noise comes from engine internal, inspect for the friction gear, timing chain or MLA noise.
8	Inspect the intake and exhaust housing system for loose installation. Is there any problem found?	Yes	Repair installation or replace suspected part.
8		No	Go to the next step.
9	Remove the parts to necessary to inspect turbocharger without remove the turbocharger. Inspect if turbocharger compressor wheel is bent, damaged, or interfering with housing on vehicle. Is there any problem?	Yes	Replace the turbocharger.
9		No	Go to the next step.
10	Inspect the turbocharger compressor wheel locknut is loose or has fallen down inside turbocharger. Is there any problem?	Yes	Replace the turbocharger.
10		No	Go to the next step.
11	Turn the turbocharger compressor wheel by hand. Does the wheel turn easily and smoothly?	Yes	Go to the next step.
11		No	Replace the turbocharger.
12	Visually inspect the turbine housing. Is there any carbon built-up or foreign material on turbine housing?	Yes	Clean built-up carbon or remove foreign materials. If turbine housing damaged, replace the turbocharger.
12		No	Install the removal parts at Step 9, and inspect all turbocharger related parts installed correctly.
13	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.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION	RESULTS	ACTION
1	Inspect the following components for loose attaching bolts or worn parts: Cooling fan Condenser fan Drive belt and pulley Engine mounts Exhaust system Are all items normal?	Yes	Inspect the following systems: Wheels Transmission and mounts Driveline Suspension Service if necessary.
1		No	Readjust or retighten suspect parts installation position. Service if necessary for other parts.
2	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.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION	RESULTS	ACTION
1	Connect the M-MDS to the DLC-2. Turn the ignition switch to the ON position (Engine off). Retrieve any DTCs. Are there any DTCs displayed?	Yes	DTC is displayed: Go to the appropriate DTC test.
1		No	No DTC is displayed: Go to the next step.
2	Disconnect the A/C compressor connector. Start the engine and turn the A/C switch on. Is there correct voltage at terminal of A/C compressor magnetic clutch connector? Specification 10.5 V or more	Yes	Inspect for the ground condition of magnetic clutch on A/C compressor. If ground condition is normal, inspect for an open circuit magnetic clutch coil.
2		No	Go to the next step.
3	Disconnect the refrigerant pressure switch connector. Connect jumper wire between terminals of A/C high-pressure switch connector. Connect jumper wires between terminals of refrigerant pressure switch connector. Turn the ignition switch to the ON position. Turn A/C switch on and set blower fan to any speed. Does A/C work?	Yes	Inspect the refrigerant pressure switch operation. If switch is normal, go to the next step.
3		No	Inspect for the following: A/C switch is stuck open. Open circuit between refrigerant pressure switch and PCM terminal 1AU Open circuit between blower motor fan switch and resistor (if blower motor does not operate) Evaporator temperature sensor and A/C amplifier
4	Remove jumper wire from switch connector. Reconnect connector to refrigerant pressure switch. Start engine and turn A/C switch on. Does fan operate?	Yes	Inspect the whether A/C relay is stuck open. Replace if necessary.
4		No	Inspect the following and repair or replace if necessary: Refrigerant charging amount A/C compressor for seizure
5	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.le. Retest.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION	RESULTS	ACTION
1	Connect the M-MDS to the DLC-2. Turn the ignition switch to the ON position (Engine off). Retrieve any DTCs. Are there any DTCs displayed?	Yes	DTC is displayed: Go to the appropriate DTC test.
1		No	No DTC is displayed: Go to the next step.
2	Start the engine and idle it. Turn the A/C switch on. Remove the A/C relay. Does the A/C magnetic clutch disengage?	Yes	Inspect for the following: A/C relay is stuck closed. Short to ground circuit between A/C relay and PCM terminal 11. If both items normal, go to the next step.
2		No	Inspect if circuit between A/C relay and magnetic clutch shorts to battery power circuit. If circuit is normal, inspect magnetic clutch for stuck engagement or clearance.
3	Disconnect the refrigerant pressure switch connector. Start the engine and turn the A/C switch on. NOTE: A/C should not work when disconnecting connector. If A/C remains working, short to ground circuit may be present. Does A/C remain working?	Yes	Inspect for a short to ground circuit between refrigerant pressure switch and PCM terminal 1AU.
3		No	Go to the next step.
4	Reconnect refrigerant pressure switch connector. Turn off A/C switch. NOTE: A/C should not work when turning A/C switch off. If A/C remains working, short to ground circuit may be present. Does A/C remain working?	Yes	Inspect for the following: Short to ground circuit between A/C switch and A/C amplifier Short to ground circuit between A/C amplifier and refrigerant pressure switch
4		No	Inspect the whether A/C switch is stuck closed.
5	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.le. Retest.

NOTE
A/C should not work when disconnecting connector. If A/C remains working, short to ground circuit may be present.

NOTE
A/C should not work when turning A/C switch off. If A/C remains working, short to ground circuit may be present.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION	RESULTS	ACTION
1	Does the A/C compressor disengage when A/C switch is turned off?	Yes	Go to the next step.
1		No	Go to symptom troubleshooting " NO.24 A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY ".
2	Connect the M-MDS to the DLC-2. Turn the ignition switch to the ON position (Engine off). Retrieve any DTCs. Are there any DTCs displayed?	Yes	DTC is displayed: Go to appropriate DTC test.
2		No	No DTC is displayed: Inspect the accelerator position sensor.
3	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 d agnostic information is not available, reprogram the PCM if a later calibration is available. Retest.le. Retest.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION	RESULTS	ACTION
1	Are any driveability or exhaust smoke concerns present?	Yes	Go to the appropriate flow chart.
1	Are any driveability or exhaust smoke concerns present?	No	Go to the next step.
2	Inspect for the following: Electrical connections Vacuum lines Fuel quality Are all items normal?	Yes	Go to the next step.
2		No	Service if necessary. Repeat Step 2.
3	Connect the M-MDS to the DLC-2. Turn the ignition switch to the ON position (Engine off). Retrieve any DTCs. Are there any DTCs displayed?	Yes	DTC is displayed: Go to the appropriate DTC test.
3		No	No DTC is displayed: Go to the next step.
4	Access and monitor FUEL_PRES PID. Is the FUEL_PRES PID value within the specified? (See PCM INSPECTION [L3 WITH TC] .)	Yes	Go to Step 8.
4		No	Go to the next step.
5	Is vehicle accelerate performance normally?	Yes	Go to the next step.
5	Is vehicle accelerate performance normally?	No	Go to Step 7.
6	Inspect the fuel pressure sensor. (See FUEL PRESSURE SENSOR INSPECTION [L3 WITH TC] .) Is the fuel pressure sensor normal?	Yes	Go to Step 8.
6		No	Go to the next step.
7	Replace the high pressure fuel pump. Monitor FUEL_PRES PID. Is the FUEL_PRES PID value within the specified? (See PCM INSPECTION [L3 WITH TC] .)	Yes	Troubleshooting is completed. Go to Step 9.
7		No	Go to the next step.
8	Inspect the charcoal canister for fuel saturation. Is excess amount of liquid fuel present in canister?	Yes	Replace the charcoal canister.
8		No	Inspect the fuel tank vent system. If fuel tank vent system is normal, suggest trying a different brand since sulfur content can vary in different fuels. If fuel tank vent system is not normal, repair or replace the malfunctioning parts.
9	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.le. Retest.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	Connect the M-MDS to the DLC-2. Turn the ignition switch to the ON position (Engine off). Retrieve any DTCs. Are there any DTCs displayed?	Yes	DTC is displayed: Go to the appropriate DTC test.
1		No	No DTC is displayed: Go to the next step.
2	Remove the fuel-filler pipe. Make sure nonreturn valve is installed properly. Inspect the nonreturn valve operation. Is nonreturn valve normal?	Yes	Inspect for the following: Improper use of fuel nozzle Inadequate fuel filling speed
2		No	Nonreturn valve is installed improperly: Reinstall the nonreturn valve to proper position. Nonreturn valve does not operate properly: Replace the nonreturn valve.
3	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.le. Retest.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	Connect the M-MDS to the DLC-2. Turn the ignition switch to the ON position (Engine off). Retrieve any DTCs. Are there any DTCs displayed?	Yes	DTC is displayed: Go to the appropriate DTC test.
1		No	No DTC is displayed: Go to the next step.
2	Remove the fuel-filler pipe. Make sure nonreturn valve is installed properly. Inspect the nonreturn valve operation. Is nonreturn valve normal?	Yes	Inspect for the following: Improper use of fuel nozzle Fuel is not inserted correctly. Inspect fuel shut-off valve.
2		No	Nonreturn valve is installed improperly: Reinstall the nonreturn valve to proper position. Nonreturn valve does not operate properly: Replace the nonreturn valve.
3	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.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION	RESULTS	ACTION
1	Remove all the spark plugs. Inspect the spark plug condition. Is the spark plug condition normal?	Yes	Troubleshooting completed.
1		No	Specific plug is wet or covered with carbon: Go to the next step. Specific plug looks grayish white: Go to Step 9. All plugs are wet or covered with carbon: Go to Step 11. All plugs look grayish white: Go to Step 19.
2	Is the spark plug wet/covered with carbon from engine oil?	Yes	Inspect all areas related to oil.
2	Is the spark plug wet/covered with carbon from engine oil?	No	Go to the next step.
3	Inspect the spark plugs for the following: Cracked insulator Heat range Air gap Worn electrode Is the spark plug normal?	Yes	Go to the next step.
3		No	Replace the spark plug.
4	Inspect the compression pressure at the suspected malfunctioning cylinder. Is the compression pressure correct? (See COMPRESSION INSPECTION [L3 WITH TC] .)	Yes	Go to the next step.
4		No	Repair or replace the malfunctioning parts.
5	Install all the spark plugs. Perform the spark test at the suspected malfunctioning cylinder. Is a strong blue spark visible? (Compare with normal cylinder.)	Yes	Go to the next step.
5		No	Repair or replace the malfunctioning parts.
6	Access and monitor the FUEL_PRES PID. Is the FUEL_PRES PID value within the specification? (See PCM INSPECTION [L3 WITH TC] .)	Yes	Inspect the suspected cylinders fuel injector for the following: Open or short circuit in the fuel injector (See FUEL INJECTOR INSPECTION [L3 WITH TC] .)
6		No	Go to the next step.
7	Inspect the fuel pressure sensor. (See FUEL PRESSURE SENSOR INSPECTION [L3 WITH TC] .) Is the fuel pressure sensor normal?	Yes	Go to the next step.
7		No	Replace the delivery pipe.
8	Inspect the high pressure fuel pump. (See FUEL PRESSURE SENSOR INSPECTION [L3 WITH TC] .) Is the high pressure fuel pump normal?	Yes	Replace the delivery pipe. Retest Step 6 If the FUEL_PRES PID indication is other that the specification, replace the high pressure fuel pump.
8		No	Replace the high pressure fuel pump.
9	Inspect the spark plug for the following. Heat range Air gap Is the spark plug normal?	Yes	Go to the next step.
9		No	Replace the spark plug.
10	Perform the KOER self-test function using the M-MDS. (See KOEO/KOER SELF TEST [L3 WITH TC] .) Is the suspected cylinder injector circuit related DTC (P0201, P0202, P0203 or P0204) present?	Yes	Go to appropriate the DTC test. (See DTC TABLE [L3 WITH TC] .)
10		No	Inspect the suspect cylinder fuel injector for the following: Resistance (See FUEL INJECTOR INSPECTION [L3 WITH TC] .)
11	Is the air cleaner element free of blockage?	Yes	Go to the next step.
11	Is the air cleaner element free of blockage?	No	Replace the air cleaner element.
12	Perform the spark test. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Is a strong blue spark visible at each cylinder?	Yes	Go to the next step.
12		No	Repair or replace the malfunctioning parts.
13	Access and monitor the FUEL_PRES PID. Is the FUEL_PRES PID value within the specification? (See PCM INSPECTION [L3 WITH TC] .)	Yes	Go to step 16.
13		No	Go to the next step.
14	Inspect the fuel pressure sensor. (See FUEL PRESSURE SENSOR INSPECTION [L3 WITH TC] .) Is the fuel pressure sensor normal?	Yes	Go to the next step.
14		No	Replace the delivery pipe.
15	Inspect the high pressure fuel pump. (See HIGH PRESSURE FUEL PUMP INSPECTION [L3 WITH TC] .) Is the high pressure fuel pump normal?	Yes	Replace the delivery pipe. Retest Step 13. If the FUEL_PRES PID indication is other that the specification, replace the high pressure fuel pump.
15		No	Replace the high pressure fuel pump.
16	Inspect the following PIDs: ECT O2S11 (When engine can be started) MAF (See PCM INSPECTION [L3 WITH TC] .) Are the PIDs normal?	Yes	Go to the next step.
16		No	Repair or replace the malfunctioning parts.
17	Perform the purge control inspection. (When engine can be started) (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 WITH TC] ). Is the purge control correct?	Yes	Go to the next step.
17		No	Repair or replace the malfunctioning parts.
18	Perform the compression inspection. Is the compression correct?	Yes	Inspect for clogging in the exhaust system.
18		No	Repair or replace the malfunctioning parts.
19	When the engine cannot be started, inspect the intake-air system for air leakage. When the engine can be started, perform the intake manifold vacuum inspection. Is air sucked in from the intake-air system?	Yes	Repair or replace the malfunctioning part.
19		No	Go to the next step.
20	Access and monitor the FUEL_PRES PID. Is the FUEL_PRES PID value within the specification? (See PCM INSPECTION [L3 WITH TC] .)	Yes	Inspect for the following PIDs: ECT O2S11 O2S12 MAF (See PCM INSPECTION [L3 WITH TC] .) Inspect the PCM ground condition.
20		No	Go to the next step.
21	Is vehicle accelerate performance normally?	Yes	Go to the next step.
21	Is vehicle accelerate performance normally?	No	Go to Step 13.
22	Inspect the fuel pressure sensor. (See FUEL PRESSURE SENSOR INSPECTION [L3 WITH TC] .) Is the fuel pressure sensor normal?	Yes	Go to the next step.
22		No	Replace the delivery pipe.
23	Replace the high pressure fuel pump. Monitor FUEL PRES PID. Is the FUEL_PRES PID value within the specified? (See PCM INSPECTION [L3 WITH TC] .)	Yes	Troubleshooting is completed. Go to Step 16.
23		No	Inspect following PIDs. ECT O2S11 O2S12 MAF (See PCM INSPECTION [L3 WITH TC] .) Inspect PCM ground condition.
24	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.

DIAGNOSTIC PROCEDURE

Inspection Method for Sensors

Connect the M-MDS to the DLC-2.
Turn the ignition switch to the ON position (Engine off). NOTE: If the engine starts and runs, perform the following steps during idle.
Access the PIDs for the switch you are inspecting.
Shake the sensor slightly with your finger. If the PID value is unstable or a malfunction occurs, check for a poor connection or a poorly mounted sensor or both.

Scheme 37

Scheme 37: Inspection Method for Actuators or Relays

Connect the M-MDS to the DLC-2.
Turn the ignition switch to the ON position (Engine off). NOTE: If engine starts and runs, perform the following steps during idling.
Prepare the output state control function for actuators or relays that you are inspecting.
Shake the actuator or relay with your finger for 3 s after the output state control function is activated. If a variable click sound is heard, check for a poor connection or a poorly mounted actuator or both, or the relay. NOTE: Shake the relays too strongly may result in open circuits.

Intake Manifold Vacuum Inspection

Verify air intake hoses are installed properly.
Start the engine and run it is idling.
Disconnect the vacuum hose between the intake manifold and purge solenoid valve from the intake manifold side.
Connect a vacuum gauge to the intake manifold and measure the intake manifold vacuum. If not as specified, inspect the following: Specification More than 60 kPa {450 mmHg, 18 inHg} NOTE: Air suction can be located by the engine speed change when lubricant is sprayed on the area where suction is occurring. Air suction at throttle body, charge air cooler, intake manifold and PCV valve installation points EGR valve (stuck open) Engine compression

Engine coolant temperature compensation inspection

Connect the M-MDS to the DLC-2.
Select the following PIDs: ECT IAT RPM
Verify that the engine is cold, then start the engine.
Verify that the engine speed decreases as the engine warms up. If the engine speed does not decrease or decreases slowly, inspect the following: ECT sensor and related wiring harness (See «ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [L3 WITH TC]»(ref-345229-S15058237682009102000000) .) Electronic throttle body and related wiring harness

Load compensation inspection

Start the engine and run it is idling.
Connect the M-MDS to the DLC-2.
Verify that DTC P0506 or P0507 is not displayed. If DTC P0506, or P0507 is displayed, perform the DTC inspection. (See «DTC TABLE [L3 WITH TC]»(ref-345283-S18459666242009102000000) .)
Select the RPM PID. NOTE: Excludes temporary idle speed drop just after the loads are turned on.
Verify that the engine speed is within the specification under each load condition. If the load condition is not as specified, inspect the following: A/C switch and related wiring harness Fan switch and related wiring harness PSP switch and related wiring harness (See «POWER STEERING PRESSURE (PSP) SWITCH INSPECTION [L3 WITH TC]»(ref-345229-S18403499542009102000000) .)

Engine speed

Load condition		Engine speed (rpm) (1)
No load		650-750
E/L operating		650-750
P/S operating		650-750
A/C operating (2)	Refrigerant pressure low (3)	700-S00
A/C operating (2)	Refrigerant pressure high (4)	700-800
(1) Neutral (2) A/C switch and fan switch are on. (3) Refrigerant pressure switch (middle pressure) is off. (4) Refrigerant pressure switch (middle pressure) is on.

(1)

Neutral

(2)	A/C switch and fan switch are on.

(3)	Refrigerant pressure switch (middle pressure) is off.

(4)	Refrigerant pressure switch (middle pressure) is on.

ENGINE SPEED SPECIFICATIONS

Throttle position (TP) sweep inspection

Connect the M-MDS to the DLC-2.
Reform the KOER self-test function. (See «KOEO/KOER SELF TEST [L3 WITH TC]»(ref-345283-S09205880142009102000000) .)
Verify that none of the following DTCs are displayed: P0122, P0123, P0222, P0223, P2100, P2101, P2102, P2103, P2107, P2108, P2119, P2122, P2123, P2127, P2128, P2135, P2138 If any one DTC is displayed, perform the DTC inspection.
Access the TP_REL PID.
Verify that the PID reading is within the CTP value. (See «PCM INSPECTION [L3 WITH TC]»(ref-345229-S19000659942009102000000) .) If the PID reading is out of range, perform the following: Remove the air duct from the throttle valve body. Verify that the throttle valve opens when the accelerator pedal is depressed. If the throttle valve opens, inspect the throttle position sensor and the related wiring harness. If the throttle valve does not open, inspect the throttle actuator control motor and the related wiring harness.
Gradually depress the throttle pedal and verify that the PID reading increases lineally. If the PID reading drops momentarily, inspect the following: Throttle position sensor
Fully depress the throttle pedal and verify that the PID reading is within the WOT value. (See «PCM INSPECTION [L3 WITH TC]»(ref-345229-S19000659942009102000000) .) If the PID reading is out of range, perform the following: Remove the air duct from throttle valve body with connector connected. Verify that the throttle valve opens when throttle pedal is depressed. If the throttle valve opens, inspect the throttle position sensor and the related wiring harness. If the throttle valve does not open, inspect the throttle actuator control motor and the related wiring harness.

Fuel Cut Control System Inspection

Note. This inspection has to be performed after the Fuel Injector Operation Inspection.

Spark Test

Disconnect the fuel pump relay.
Disconnect the injector driver module connector.
Verify that each ignition coil and connector is connected properly.
Inspect the ignition system in the following procedure.
Clear the DTC from PCM memory using the M-MDS, after perform the spark test procedures and reconnect the injector driver module connector. WARNING: High voltage in the ignition system can cause strong electrical shock which can result in serious injury. Avoid direct contact to the vehicle body during the following spark test. SPARK TEST REFERENCE STEP INSPECTION ACTION 1 Disconnect the ignition coil from the spark plugs. Remove the spark plugs. Verify that the spark plugs do not have carbon deposits. Are the spark plugs normal? Yes Go to the next step. No Perform no-load racing at 4,000 rpm for 2 min, 2 times to burn off the carbon deposits. Repeat Step 1. 2 Inspect the spark plugs for damage, wear, and proper plug gap. Are the spark plugs normal? Yes Go to the next step. No Replace spark plugs, then go to the next step. 3 Reconnect the spark plugs to the ignition coil. Ground the spark plugs to the engine. Is a strong blue spark visible at each cylinder while cranking the engine? Yes Ignition system is normal. No Some cylinders do not spark: Go to the next step. All cylinders do not spark: Go to Step 5. 4 Inspect the following wiring harnesses for an open or short circuit: Ignition coil No.1 terminal C-PCM terminal 2BA Ignition coil No.2 terminal C-PCM terminal 2AW Ignition coil No.3 terminal C-PCM terminal 2AX Ignition coil No.4 terminal C-PCM terminal 2AT Are the wiring harnesses normal? Yes Inspect and replace the ignition coil. No Repair or replace the malfunctioning part, then go to Step 1. 5 Measure the voltage at terminal A in each ignition coils. Is the voltage B+ ? Yes Go to the next step. No Inspect the power supply circuit of ignition coils. 6 Does the PCM connector or ignition coil connectors have poor connection? Yes Repair or replace the connector, then go to Step 1. No Go to the next step. 7 Are the following parts normal? CKP sensor and crankshaft pulley Yes Inspect for an open or short circuit in the wiring harness and connector of the CKP sensor. No Repair or replace the malfunctioning part, then go to Step 1.

A/C Cut-off Control System Inspection

Start the engine.
Turn the A/C switch and fan switch on.
Verify that the A/C compressor magnetic clutch actuates. If it does not actuate, go to symptom troubleshooting " «NO.23 A/C DOES NOT WORK SUFFICIENTLY»(ref-345236-S36415245892009102000000) ".
Fully open the throttle valve and verify that the A/C compressor magnetic clutch does not actuate for 2-5 s. If it actuates, inspect as follows: A/C relay Open or short to ground circuit in the wiring harness and connectors (Ignition switch-A/C relay-PCM terminal 11) A/C related parts APP1, APP2 PIDs

Cooling Fan Control System Inspection

Verify that the battery voltage is more than 12.4 V. If the battery voltage is less than 12.4 V , charge the battery or connect the external power supply.
Connect the M-MDS and access ECT PID.
Turn A/C switch to off.
Verify ECT PID is less than 98°C {209°F} . If ECT PID more than 98°C {209°F} , inspect ECT sensor and related wiring harnesses.
Verify that the cooling fan does not operate with ECT PID is less than 98°C {209°F} while the ignition switch is ON. If the cooling fan operates, inspect for following parts and related wiring harnesses: ECT sensor A/C switch A/C refrigerant pressure switch (High/low pressure) A/C refrigerant pressure switch (Medium pressure) VSS A/C magnetic clutch Fan control signal circuit (between fan control module terminal B and PCM terminal 1AE) If the all items are normal, replace fan control module.
Verify the cooling fan operates while the A/C switch to ON with the ignition switch at ON position. If the cooling fan does not operate, inspect for following: A/C switch A/C refrigerant pressure switch (High/low pressure) Fan control module power supply circuit Fan control module GND circuit Fan control signal circuit (between fan control module terminal B and PCM terminal 1 AE) If the all items are normal, replace fan control module.
Verify that the cooling fan operates with following table. VOLTAGE REFERENCE PCM terminal 1J voltage B+ (off) (1) 0V (ON) (1) Cooling fan speed Middle speed High speed (1) A/C refrigerant pressure switch (Medium pressure) condition If the cooling fan operation is not specified, inspect for following: A/C refrigerant pressure switch (Medium pressure) If the A/C refrigerant pressure switch (Medium pressure) is normal, replace fan control module.
Turn A/C switch to off.
Start the engine and idle it.
Verify that the cooling fan operating speed increases relative to ECT PID increases. If the cooling fan speed does not increase inspect following: ECT sensor (characteristic) (See «ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [LF, L3]»(ref-345210-S19863593132009102000000) .) Fan control signal circuit (between fan control module terminal B and PCM terminal 1AE) If the all items are normal, replace fan control module.

EVAP system leak inspection using M-MDS

Note. EVAP system test outline The EVAP system test, which can substituted for the run drive cycle as an EVAP control system repair confirmation method, can be done while operating the M-MDS in the KOEO (Key On Engine Off) condition instead of actually driving the vehicle.

Scheme 38

Scheme 38: EVAP system test description

The EVAP system test finds gas leaks in the system using the PCM to monitor changes in the air pump load current of the EVAP system leak detection pump. This test starts after sending an on-demand test signal from the M-MDS to the PCM. The PCM controls the air pump and change-over-valve operation and also stores the load current of the air pump as follows: The PCM commands turn the air pump on and retrieve the air pump load current value (LDP_MON PID) as a reference current (LDP_REF PID). After retrieving a reference current value, the PCM commands the change-over-valve to open, then captures the air pump load current value (LDP_MON PID) as idle current (LDP_MON PID). The EVAP system will be pressurized from this phase. The PCM continues to monitor the air pump load current value (LDP_MON PID) until the end of the test.
You can confirm whether any evaporative gas leak occurred or not by reading the test results.

Scheme 39

Scheme 39: EVAP system malfunction judgment

The PCM calculates the stored air pump load current value and send the results to the M-MDS as DTCs: EVAPORATIVE EMISSION REFERENCE DTC No. Condition P0442 Evaporative emission control system leak detected (small leak) P0446 Change over valve (COV) (EVP system leak detection pump) stuck close P0455 Evaporative emission control system leak detected (gross leak) P0456 Evaporative emission system leak detected (very small leak) P2401 EVAP system leak detection pump motor circuit low P2402 EVAP system leak detection pump motor circuit high P2404 EVAP system leak detection pump sense circuit problem P2405 EVAP system leak detection pump sense circuit low input P2407 EVAP system leak detection pump sense circuit intermittent

Evaporative system test procedure

Select the EVAP system test from the Toolbox on the M-MDS display and follow the instructions.
Verify that all of the following PIDs are within the specifications at the pre-test confirmation screen. NOTE: To successfully perform this procedure, all PIDs must be within the following specifications before proceeding to the next step. The PCM will cancel the EVAP system test if the VPWR PID value falls lower than 11.0 V during the test. Specification SPECIFICATION PID PID Range BARO 72.2 kPa {543 mmHg, 21.3 inHg} or more FLI 15-85% IAT 5-45°C {41-113°F} VPWR 11.0 V or more
Start the engine.
Drive the vehicle or let the engine idle more than 20 min.
Turn ignition switch off, then turn it to the ON position again (Key On Engine Off).
Press the tick icon to start the test.
Verify that no DTCs present after the completion of the test. If any test result is indicated with red, diagnose the problem using the following DTC troubleshooting procedure or component inspection procedure. If any DTCs are detected, diagnose the problem using the appropriate DTC troubleshooting procedure.

Scheme 40

Scheme 40: EVAP system leak inspection using leak tester

Scheme 41

Perform the following SST (EVAP System Tester 134-01049) self-test: NOTE: If the tester does not work correctly during the self-test, refer to the tester operators manual for a more detailed self-test procedure. Verify that the control valve on the panel is in the HOLD position then open the nitrogen bottle valve. Connect the vehicle interface hose (part of the SST ) to the SELF-TEST port located on the control panel. Hand tighten the fitting. (Do not overtighten.) Turn the control valve to the TEST position. The gauge should read 331-381 mm {13- 15 in} of water. If the gauge is not reading in this range, adjust the pressure by turning the black knob on the low pressure regulator at the nitrogen bottle. Turn the control valve to the HOLD position. Verify that the gauge holds pressure and that the flow meter reads no flow. If there is no drop in pressure and no flow, the tester passes the self-test. If the gauge leaks down, refer to the tester operators manual.
Connect the SST to the vehicle. Verify that the control valve on the panel is in the HOLD position then open the nitrogen bottle valve. Remove the fuel-filler cap from the vehicle. If the fuel-filler cap is not a MAZDA part or equivalent, replace it. Connect the receiver assembly ( SST: AKS441130) to the vehicle cap test hose assembly (part of the SST) and the fuel-filler cap from the vehicle. Connect the cap adaptor ( SST: AKS441131 ) to the vehicle cap test hose assembly (part of the SST) and to the fuel-filler neck. Connect the vehicle interface hose (part of the SST ) to the center fitting of the vehicle cap test hose assembly (part of the SST).
Connect the M-MDS to the DLC-2.
Turn the ignition switch to the ON position (Engine off).
Request the PCM on-board device control (Mode 08) using the M-MDS to close the change-over valve (COV) in the EVAP system leak detection pump. NOTE: The COV is closed for 10 min unless the following any actions are done: The engine is started. The ignition switch is turned off position.
Make sure the control valve on the 134-01049 is in the HOLD position and that the valve on the cylinder of nitrogen gas is open.
Turn the control valve to the open position and let the system fill. You should note a drop in the gauge pressure along with the flow meter being pegged at maximum flow for several minutes depending on how full or empty the fuel tank is, and how long it takes to completely fill and pressurize the evaporative emissions system hoses.
If the gauge and the flow meter do not settle to a measurable level after 2-3 min , then refer to the Mazda Workshop Manual to verify that the cut or vent valve is properly closed.
Verify the pressure gauge and flow meter reading to determine if there is an evaporative emissions leak: NO EVAPORATIVE LEAK: The flow meter registers "zero flow" and the pressure gauge returns to the pre-set pressure of 356 mm {14 in} of water (H2O). EVAPORATIVE LEAK: The pressure does not return to the preset level of 356 mm {14 in} of water (H2O) when measuring the flow. See (.020 to .040 inch H2O) of the Evaporative Emissions Tester operators manual (134-01067). NOTE: Turn the control valve to the HOLD position then disconnect the SST.

Symptom Troubleshooting - Engine - (L3 with TC): Diagnosis Mazda 3 BL

ENGINE SYMPTOM TROUBLESHOOTING [L3 WITH TC]

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Scheme 32

Scheme 33

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Scheme 36

Diagnostic procedure

Inspection Method for Sensors

Scheme 37

Intake Manifold Vacuum Inspection

Engine coolant temperature compensation inspection

Load compensation inspection

Throttle position (TP) sweep inspection

Fuel Cut Control System Inspection

Spark Test

A/C Cut-off Control System Inspection

Cooling Fan Control System Inspection

EVAP system leak inspection using M-MDS

Scheme 38

Scheme 39

Evaporative system test procedure

Scheme 40

Scheme 41

More articles — Symptom Troubleshooting - Engine - (L3 with TC)

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