Symptom Troubleshooting [L5] - Engine: Diagnosis — Mazda CX-7 I рестайлинг (2009-2012)

SYMPTOM DIAGNOSTIC INDEX [L5]

Confirm trouble symptom using the following diagnostic index, then go to appropriate troubleshooting chart.

Diagnostic Index

No.	TROUBLESHOOTING ITEM		DESCRIPTION
1	Melting of main or other fuses
2	MIL illuminates		MIL is illuminated incorrectly.
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 and/or after start.
6	Cranks normally but will not start		The starter cranks engine at normal speed but engine will not run. Refer to symptom troubleshooting " NO.5 ENGINE STALLS " if this symptom appears after engine stall. Fuel is in tank. Battery is in normal condition.
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. Idle speed is too slow and engine shakes excessively.
9	Fast idle/runs on		Engine speed continues at fast idle after warm-up. Engine runs after ignition is 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 (such as 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 (such as 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 wide open throttle conditions		A/C compressor magnetic clutch does not disengage under wide open throttle.
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 concerns		Fuel does not shut off properly.
29	Spark plug condition		Incorrect spark plug condition.
30	ATX concerns	Upshift/downshift/engagement	ATX concerns not related to engine performance.

DIAGNOSTIC INDEX

Scheme 28

Scheme 28: CONTROL SYSTEM DEVICE AND CONTROL RELATIONSHIP CHART [L5]

Scheme 29

Scheme 30

Scheme 30: QUICK DIAGNOSTIC CHART [L5]

Scheme 31

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Scheme 45

Scheme 45: FOREWORD [L5]

When the customer reports a vehicle malfunction, check the malfunction indicator lamp (MIL) indication and diagnostic trouble code (DTC), then diagnose the malfunction according to the following flowchart: If a DTC exists, diagnose the applicable DTC inspection. (See «DTC TABLE [L5]»(ref-375346-S28771957642010102800000) .) If no DTC exists and the MIL does not illuminate or flash, diagnose the applicable symptom troubleshooting. (See «QUICK DIAGNOSTIC CHART [L5]»(ref-375348-S21626765982010102800000) .)

*: Malfunction Indicator Lamp (MIL), Generator Warning Light, Security Light

Diagnostic procedure

STEP	INSPECTION	RESULTS	ACTION
1	Perform the PCM DTC inspection using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [L5] .)
1		No	Inspect the instrument cluster. (See INSTRUMENT CLUSTER INSPECTION .) Repair or replace the malfunctioning part according to the inspection results.
2	Verify test results. If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [L5] .) If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform 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 and start system. If not equipped, go to the next step. Insert the emergency key in the emergency slot and start the engine.Does the engine start?	Yes	Inspect the advanced keyless entry and start system. Repair or replace the malfunctioning part according to the inspection results.
1		No	Go to the next step.
2	Do the following conditions appear? The engine is not completely started. Immobilizer system DTC B10DA:62 is displayed.	Yes	Both conditions appear: Go to Step 5.
2		No	Either condition or other one appears: Go to the next step.
3	Inspect the coil antenna connector and terminals for poor connection (such as damaged/pulled-out pins, corrosion). Is there any malfunction?	Yes	Repair or replace the connector and/or terminals. Return to Step 1.
3		No	Go to the next step.
4	Does the security light flash?	Yes	Go to the next step.
4	Does the security light flash?	No	Inspect the instrument cluster and the related wiring harness. (See INSTRUMENT CLUSTER INSPECTION .) Repair or replace the malfunctioning part according to the inspection results.
5	Connect the M-MDS to DLC-2. Perform the immobilizer system DTC inspection. (See DTC INSPECTION [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] .) (See DTC INSPECTION [IMMOBILIZER SYSTEM (ADVANCED KEYLESS ENTRY AND START SYSTEM)] .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] .) (See DTC TABLE [IMMOBILIZER SYSTEM (ADVANCED KEYLESS ENTRY AND START SYSTEM)] .)
5		No	Go to the next step.
6	Inspect the wiring harness between the following terminals (wiring harness-side) and related connectors: Vehicles without advanced keyless entry and start system: Coil antenna terminal A-Instrument cluster terminal 2Q Coil antenna terminal B-Instrument cluster terminal 2S PCM terminal 1AM-Instrument cluster terminal 2R PCM terminal 1AI-Instrument cluster terminal 2T Vehicles with advanced keyless entry and start system: Coil antenna terminal A-Keyless control module terminal 3V Coil antenna terminal B-Keyless control module terminal 3U PCM terminal 1AM-Keyless control module terminal 3X PCM terminal 1AI-Keyless control module terminal 3W Is there any malfunction?	Yes	Repair or replace the suspected wiring harness and connector.
6		No	Go to the next step.
7	Inspect the following: Battery connection Battery condition (See BATTERY INSPECTION [L5] .) Fuse (See NO.1 MELTING OF MAIN OR OTHER FUSES [L5] .) Selector lever is in P or N position Are all items normal?	Yes	Go to the next step.
7		No	Repair or replace the malfunctioning part according to the inspection results. Repeat Step 7.
8	Inspect for continuity between PCM terminal 1BB (wiring harness-side) and starter relay with P or N position. Is there continuity?	Yes	Go to the next step.
8		No	Repair or replace the suspected wiring harness.
9	Turn the ignition switch to the ON position (engine ON) with P or N position. Is a clicking sound heard from the starter relay?	Yes	Go to Step 13.
9		No	Go to the next step.
10	Access the TR PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Does the TR PID indicate normally when selecting the P or N position?	Yes	Go to the next step.
10		No	Verify that the TR switch is adjusted properly. Inspect for open or short circuit between TR switch and TCM. Repair or replace the malfunctioning part according to the inspection results. Repeat Step 10.
11	Inspect the starter relay and the wiring harness between the following: (See RELAY INSPECTION [L5] .) Starter relay and TR switch terminal A TR switch terminal F and PCM terminal 1 BB Starter relay and ignition switch Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results. Repeat Step 10.
11		No	Go to the next step.
12	Inspect the ignition switch and the related wiring harness. (See IGNITION SWITCH INSPECTION .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results. Repeat Step 10.
12		No	Go to the next step.
13	Inspect the wiring harness between the following: Starter relay and battery positive terminal Starter relay and starter Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to the next step.
13		No	Go to the next step.
14	Inspect the starting system. (See STARTER INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
14		No	Go to the next step.
15	Inspect for a seized/hydro locked engine or drive plate. Is the engine seized or hydro locked?	Yes	Go to the next step.
15		No	Repair or replace the malfunctioning part according to the inspection results.
16	Perform the PCM DTC inspection using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Are there any continuous memory DTCs present?	Yes	Continuous memory DTC is displayed: Go to the applicable DTC inspection. (See DTC TABLE [L5] .) Communication error message is displayed: Inspect the following: Open circuit in the wiring harness between main relay terminal 2 (wiring harness-side) and PCM terminal 1Q (wiring harness-side) Open circuit in the wiring harness between main relay terminal 5 and PCM terminal 1A (wiring harness-side) Main relay (stuck open) Open or short circuit in the wiring harness between DLC-2 and PCM terminals 1AM or 1 Al (wiring harness-side) Open or poor ground circuit (PCM terminal 1E, 1F, 1G or 1BE) Poor connection of vehicle body ground Repair or replace the malfunctioning part according to the inspection results.
16		No	Go to the next step.
17	Perform the KOEO self test using the M-MDS. (See KOEO/KOER SELF TEST [L5] .) Are there DTCs displayed during the KOEO inspection?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [L5] .)
17		No	Inspect the following: Start circuit in ignition switch Open circuit in wiring harness between ignition switch and starter Repair or replace the malfunctioning part according to the inspection results.
18	Verify test results. If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [L5] .) If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform 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
The following test should be performed on the advanced keyless entry and start system. If not equipped, go to the next step.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION	RESULTS	ACTION
1	Inspect the following: Vacuum leakage Proper fuel quality (such as proper octane, contamination, winter/summer blend) Loose bands on intake air system Cracks on intake air system parts Intake air system restriction (such as air cleaner element, fresh air duct) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results. Repeat Step 1.
1		No	Go to the next step.
2	Perform the PCM DTC inspection. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [L5] .)
2		No	Go to the next step.
3	Is the engine overheating?	Yes	Go to the symptom troubleshooting "NO.17 COOLING SYSTEM CONCERNS-OVERHEATING". (See NO.17 COOLING SYSTEM CONCERNS-OVERHEATING [L5] .)
3	Is the engine overheating?	No	Go to the next step.
4	Inspect the ignition coil related wiring harness condition (intermittent open or short circuit) for all cylinders. Is there any malfunction?	Yes	Repair or replace the suspected wiring harness.
4		No	Go to the next step.
5	Perform the Spark Test. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Is a strong blue spark visible at each cylinder?	Yes	Go to the next step.
5		No	Repair or replace the malfunctioning part according to the spark test result.
6	Verify the spark plug conditions when the spark plug removed in Step 5. (See SPARK PLUG REMOVAL/INSTALLATION [L5] .) Is spark plug wet, covered with carbon or grayish white?	Yes	Spark plug is wet or covered with carbon: Inspect for fuel leakage from fuel injector. Spark plug is grayish white: Inspect the fuel injector for clogging. Repair or replace the malfunctioning part according to the inspection results.
6		No	Install the spark plugs on original cylinders, then go to the next step.
7	Visually inspect the CKP sensor and teeth of crankshaft pulley. (See CRANKSHAFT POSITION (CKP) SENSOR INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
7		No	Go to the next step.
8	Attempt to start the engine at part throttle. Does the engine run smoothly at part throttle?	Yes	Inspect the electronic throttle control system operation. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Repair or replace the malfunctioning part according to the inspection results.
8		No	Go to the next step.
9	Inspect the fuel line pressure. (See FUEL LINE PRESSURE INSPECTION [L5] .) Is there any malfunction?	Yes	Zero or low: Inspect the fuel pump relay and the fuel pump circuit. (See RELAY INSPECTION [L5] .) Inspect the fuel line for clogging. If there is a malfunction: Repair or replace the malfunctioning part according to the inspection results. If there is no malfunction: Replace the fuel pump unit. (See FUEL PUMP UNIT INSPECTION [L5] .) High: Replace the fuel pump unit. (See FUEL PUMP UNIT INSPECTION [L5] .)
9		No	Go to the next step.
10	Is the fuel line pressure held after ignition is off? (See FUEL LINE PRESSURE INSPECTION [L5] .)	Yes	Go to the next step.
10		No	Inspect the fuel injector. (See FUEL INJECTOR INSPECTION [L5] .) If the fuel injector has malfunction: Replace the fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION [L5] .) If the fuel injector is normal: Replace the fuel pump unit. (See FUEL PUMP UNIT INSPECTION [L5] .)
11	Disconnect the vacuum hose from purge solenoid valve and plug opening end of vacuum hose. Turn the ignition switch to the ON position (engine ON). Is the starting condition improved?	Yes	Inspect if the purge solenoid valve is stuck open. (See PURGE SOLENOID VALVE INSPECTION [L5] .) Repair or replace the malfunctioning part according to the inspection results.
11		No	Go to the next step.
12	Inspect the MAF sensor for the following: Contamination MAF sensor terminal B voltage (ground circuit) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
12		No	Go to the next step.
13	Visually inspect the exhaust system part. Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
13		No	Go to the next step.
14	Inspect the engine condition while tapping the EGR valve housing. Does the engine condition improve?	Yes	Replace the EGR valve. (See EGR VALVE REMOVAL/INSTALLATION [L5] .)
14		No	Go to the next step.
15	Inspect the starting system. (See STARTER INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace components as required.
15		No	Inspect for loose connectors or poor terminal contact. If there is a malfunction: Repair or replace the malfunctioning part according to the inspection results. If there is no malfunction: Remove the EGR valve and visually inspect for a mechanically stuck EGR valve. Repair or replace the malfunctioning part according to the inspection results.
16	Verify test results. If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [L5] .) If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform 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	Do the following conditions appear? The engine is not completely started. Immobilizer system DTC B10DA:62 is displayed.	Yes	Both conditions appear: Go to Step 3.
1		No	Either condition or other one appears: Go to the next step.
2	Does the engine stall after approx. 2 s from when the engine is started?	Yes	Go to the next step.
2		No	Immobilizer system is normal. Go to Step 10.
3	Inspect the coil antenna connector and terminals for poor connection (such as damaged/pulled-out pins, corrosion). Is there any malfunction?	Yes	Repair or replace the connector and/or terminals. Return to Step 2.
3		No	Go to the next step.
4	Does the security light flash?	Yes	Go to the next step.
4	Does the security light flash?	No	Inspect the instrument cluster and related wiring harness (See INSTRUMENT CLUSTER INSPECTION .) Repair or replace the malfunctioning part according to the inspection results.
5	Connect the M-MDS to DLC-2. Perform the immobilizer system DTC inspection. (See DTC INSPECTION [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] .) (See DTC INSPECTION [IMMOBILIZER SYSTEM (ADVANCED KEYLESS ENTRY AND START SYSTEM)] .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] .) (See DTC TABLE [IMMOBILIZER SYSTEM (ADVANCED KEYLESS ENTRY AND START SYSTEM)] .)
5		No	Go to the next step.
6	Inspect the wiring harness between the following terminals (wiring harness-side) and related connectors: Vehicles without advanced keyless entry and start system: Coil antenna terminal A-Instrument cluster terminal 2Q Coil antenna terminal B-Instrument cluster terminal 2S PCM terminal 1AM-Instrument cluster terminal 2R PCM terminal 1 Al-Instrument cluster terminal 2T Vehicles with advanced keyless entry and start system: Coil antenna terminal A-Keyless control module terminal 3V Coil antenna terminal B-Keyless control module terminal 3U PCM terminal 1AM-Keyless control module terminal 3X PCM terminal 1 Al-Keyless control module terminal 3W Is there any malfunction?	Yes	Repair or replace the suspected wiring harness and connector.
6		No	Go to the next step.
7	Inspect the following: Air cleaner element Electrical connections Fuel quality: proper octane, contamination, winter/summer blend Ignition wiring No air leakage from intake air system No restriction of intake air system Proper sealing of intake manifold and components attached to intake manifold: such as EGR valve Smooth operation of throttle valve Vacuum connection Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results. Repeat Step 7.
7		No	Go to the next step.
8	Access the APP1 and APP2 PIDs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Crank the engine with the accelerator pedal released. Are the APP1 and APP2 PIDs indicating that the accelerator pedal is in the released position?	Yes	Go to the next step.
8		No	Inspect the following: APP sensor (See ACCELERATOR PEDAL POSITION (APP) SENSOR INSPECTION [L5] .) Wiring harness between the following terminals and related connectors: APP sensor terminal A-PCM terminal 1W APP sensor terminal B-PCM terminal 1AV APP sensor terminal C-PCM terminal 1AO APP sensor terminal D-PCM terminal 1AE APP sensor terminal E-PCM terminal 1AJ APP sensor terminal F-PCM terminal 1AP Repair or replace the malfunctioning part according to the inspection results.
9	Access the TP REL PID using M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Crank the engine with the accelerator pedal released. Is the TP_REL PID indicating that the accelerator pedal is in the released position?	Yes	Go to the next step.
9		No	Inspect the following: TP sensor (See THROTTLE POSITION (TP) SENSOR INSPECTION [L5] .) Wiring harness between the following terminals and related connectors: TP sensor terminal A-PCM terminal 2AK TP sensor terminal B-PCM terminal 2AR TP sensor terminal C-PCM terminal 2AL TP sensor terminal D-PCM terminal 2AN Repair or replace the malfunctioning part according to the inspection results.
10	Perform the KOEO or KOER self test using the M-MDS. (See KOEO/KOER SELF TEST [L5] .) If the engine stalls: Perform the KOEO self test using the M-MDS. (See KOEO/KOER SELF TEST [L5] .) Are there any continuous memory DTCs present?	Yes	Continuous memory DTC is displayed: Go to the applicable DTC inspection. (See DTC TABLE [L5] .) Communication error message is displayed: Inspect the following: Open circuit in the wiring harness between main relay terminal 2 (wiring harness-side) and PCM terminal 1Q (wiring harness-side) Open circuit in the wiring harness between main relay terminal 5 and PCM terminal 1A (wiring harness-side) Main relay (stuck open) Open or short circuit in the wiring harness between DLC-2 and PCM terminals 1AM or 1AI (wiring harness-side) Open or poor ground circuit (PCM terminal 1E, 1F, 1G or 1BE) Poor connection of vehicle body ground Repair or replace the malfunctioning part according to the inspection results.
10		No	Go to the next step.
11	Attempt to start the engine at part throttle. Does the engine run smoothly at part throttle.	Yes	Inspect the electronic throttle control system operation. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Repair or replace the malfunctioning part according to the inspection results.
11		No	Go to the next step.
12	Access the RPM PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Is the RPM PID indicating the engine speed during engine cranking?	Yes	Go to the next step.
12		No	Inspect the following: Open or short circuit in CKP sensor Open or short circuit between CKP sensor terminal A and body ground Open or short circuit between CKP sensor terminal B and PCM terminal 2W Open or short circuit between CKP sensor terminal C and PCM terminal 2AQ CKP sensor and related wiring harness (See CRANKSHAFT POSITION (CKP) SENSOR INSPECTION [L5] .) Repair or replace the malfunctioning part according to the inspection results. If the CKP sensor and wiring harness are normal: Go to the next step.
13	Visually inspect the CKP sensor and teeth of the crankshaft pulley. (See CRANKSHAFT POSITION (CKP) SENSOR INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
13		No	Go to the next step.
14	Inspect the ignition coil related wiring harness condition (intermittent open or short circuit) for all cylinders. (See IGNITION COIL INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the suspected wiring harnesses.
14		No	Go to the next step.
15	Perform the Spark Test. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Is a strong blue spark visible at each cylinder?	Yes	Go to the next step. If a symptom occurs with the A/C on: Go to Step 20.
15		No	Repair or replace the malfunctioning part according to the inspection results.
16	Verify the spark plug conditions when the spark plug removed in Step 15. (See SPARK PLUG INSPECTION [L5] .) Is the spark plug wet, covered with carbon or grayish white?	Yes	Spark plug is wet or covered with carbon: Inspect for fuel leakage from fuel injector. Spark plug is grayish white: Inspect the fuel injector for clogging.
16		No	Install the spark plugs on original cylinders, then go to the next step.
17	Visually inspect the exhaust system part. (See EXHAUST SYSTEM INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
17		No	Go to the next step.
18	Inspect the fuel line pressure. (See FUEL LINE PRESSURE INSPECTION [L5] .) Is there any malfunction?	Yes	Zero or low: Inspect the fuel pump relay and the fuel pump circuit. (See RELAY INSPECTION [L5] .) Inspect the fuel line for clogging. If there is a malfunction: Repair or replace the malfunctioning part according to the inspection results. If there is no malfunction: Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [L5] .) High: Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [L5] .)
18		No	Go to the next step.
19	Visually inspect for fuel leakage at the fuel injector O-ring and fuel line. Is the fuel line pressure held after the ignition is off?	Yes	Go to the next step.
19		No	Inspect the fuel injector. (See FUEL INJECTOR INSPECTION [L5] .) If the fuel injector has malfunction: Replace the fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION [L5] .) If the fuel injector is normal: Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [L5] .)
20	NOTE: Following test is for stall concerns with the A/C on. If other symptoms exist, go to the next step. Connect pressure gauges to the A/C low side and high side pressure lines.Turn the A/C on and measure the low side and high side pressures.Are the pressures within the specifications? (See REFRIGERANT PRESSURE CHECK .)	Yes	Go to the next step.
20		No	If the A/C is always on: Go to the symptom troubleshooting "NO.24 A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY". (See NO.24 A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY [L5] .) For other symptoms: Inspect the following: Refrigerant charging amount Condenser fan operation Repair or replace the malfunctioning part according to the inspection results.
21	Disconnect the vacuum hose between the purge solenoid valve and the intake manifold from the purge solenoid valve side. Plug the open end of the vacuum hose. Turn the ignition switch to the ON position (engine ON). Is the engine stall now eliminated?	Yes	Inspect if the purge solenoid valve is stuck open. (See PURGE SOLENOID VALVE INSPECTION [L5] .) Inspect the evaporative emission control system. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Repair or replace the malfunctioning part according to the inspection results.
21		No	Go to the next step.
22	Is air leakage felt or heard at the intake air system components while racing the engine to higher speed?	Yes	Repair or replace the malfunctioning part according to the inspection results.
22		No	Go to the next step.
23	Inspect the engine condition while tapping the EGR valve housing. Does the engine condition improve?	Yes	Replace the EGR valve. (See EGR VALVE REMOVAL/INSTALLATION [L5] .)
23		No	Go to the next step.
24	Perform the Variable Valve Timing Control System Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
24		No	Go to the next step.
25	Inspect the engine compression. (See COMPRESSION INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
25		No	Go to the next step.
26	Inspect the PCV valve. (See POSITIVE CRANKCASE VENTILATION (PCV) VALVE INSPECTION [L5] .) Is there any malfunction?	Yes	Replace the PCV valve. (See POSITIVE CRANKCASE VENTILATION (PCV) VALVE REMOVAL/INSTALLATION [L5] .)
26		No	Inspect the valve timing. (See VARIABLE VALVE TIMING ACTUATOR INSPECTION [L5] .) Repair or replace the malfunctioning part according to the inspection results.
27	Verify test results. If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [L5] .) If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform 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
Following test is for stall concerns with the A/C on. If other symptoms exist, go to the next step.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION	RESULTS	ACTION
1	Do the following conditions appear? The engine is not completely started. Immobilizer system DTC B10DA:62 is displayed.	Yes	Both conditions appear: Go to Step 3.
1		No	Either condition or other one appears: Go to the next step.
2	Does the engine stall after approx. 2 s since the engine is started?	Yes	Go to the next step.
2		No	Immobilizer system is normal: Go to Step 7.
3	Inspect the coil antenna connector and terminals for poor connection (such as damaged/pulled-out pins, corrosion). Is there any malfunction?	Yes	Repair or replace the connector and/or terminals. Return to Step 2.
3		No	Go to the next step.
4	Does the security light flash?	Yes	Go to the next step.
4	Does the security light flash?	No	Inspect the instrument cluster and related wiring harness. (See INSTRUMENT CLUSTER INSPECTION .) Repair or replace the malfunctioning part according to the inspection results.
5	Connect the M-MDS to DLC-2. Perform the immobilizer system DTC inspection. (See DTC INSPECTION [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] .) (See DTC INSPECTION [IMMOBILIZER SYSTEM (ADVANCED KEYLESS ENTRY AND START SYSTEM)] .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)] .) (See DTC TABLE [IMMOBILIZER SYSTEM (ADVANCED KEYLESS ENTRY AND START SYSTEM)] .)
5		No	Go to the next step.
6	Inspect the wiring harness between the following terminals (wiring harness-side) and related connectors: Vehicles without advanced keyless entry and start system: Coil antenna terminal A-Instrument cluster terminal 2Q Coil antenna terminal B-Instrument cluster terminal 2S PCM terminal 1AM-Instrument cluster terminal 2R PCM terminal 1 Al-Instrument cluster terminal 2T Vehicles with advanced keyless entry and start system: Coil antenna terminal A-Keyless control module terminal 3V Coil antenna terminal B-Keyless control module terminal 31) PCM terminal 1AM-Keyless control module terminal 3X PCM terminal 1 Al-Keyless control module terminal 3W Is there any malfunction?	Yes	Repair or replace the suspected wiring harness and connector.
6		No	Go to the next step.
7	Verify the following: Vacuum connection External fuel shut off or accessory (such as kill switch, alarm) Fuel quality: proper octane, contamination, winter/summer blend No air leakage from intake air system Intake air system restriction (such as air cleaner element, fresh air duct) Proper sealing of intake manifold and components attached to intake manifold: such as EGR valve Ignition wiring Electrical connections Fuses Smooth operation of throttle valve Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results. Repeat Step 7.
7		No	Go to the next step.
8	Access the APP1 and APP2 PIDs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Crank the engine with the accelerator pedal released. Are the APP1 and APP2 PIDs indicating that the accelerator pedal is in the released position?	Yes	Go to the next step.
8		No	Inspect the following: APP sensor (See ACCELERATOR PEDAL POSITION (APP) SENSOR INSPECTION [L5] .) Wiring harness between the following terminals and related connectors: APP sensor terminal A-PCM terminal 1W APP sensor terminal B-PCM terminal 1AV APP sensor terminal C-PCM terminal 1AO APP sensor terminal D-PCM terminal 1AE APP sensor terminal E-PCM terminal 1AJ APP sensor terminal F-PCM terminal 1AP Repair or replace the malfunctioning part according to the inspection results.
9	Access the TP REL PID using M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Crank the engine with the accelerator pedal released. Is the TP_REL PID indicating that the accelerator pedal is in the released position?	Yes	Go to the next step.
9		No	Inspect the following: TP sensor (See THROTTLE POSITION (TP) SENSOR INSPECTION [L5] .) Wiring harness between the following terminals and related connectors: TP sensor terminal A-PCM terminal 2AK TP sensor terminal B-PCM terminal 2AR TP sensor terminal C-PCM terminal 2AL TP sensor terminal D-PCM terminal 2AN Repair or replace the malfunctioning part according to the inspection results.
10	Perform the KOEO or KOER self test using the M-MDS. (See KOEO/KOER SELF TEST [L5] .) If the engine stalls: Perform the KOEO self test using the M-MDS. (See KOEO/KOER SELF TEST [L5] .) Are there any continuous memory DTCs present?	Yes	Continuous memory DTC is displayed: Go to the applicable DTC inspection. (See DTC TABLE [L5] .) Communication error message is displayed: Inspect the following: Open circuit in the wiring harness between main relay terminal 2 (wiring harness-side) and PCM terminal 1Q (wiring harness-side) Open circuit in the wiring harness between main relay terminal 5 and PCM terminal 1A (wiring harness-side) Main relay (stuck open) Open or short circuit in the wiring harness between DLC-2 and PCM terminals 1AM or 1AI (wiring harness-side) Open or poor ground circuit (PCM terminal 1E, 1F, 1G or 1BE) Poor connection of vehicle body ground Repair or replace the malfunctioning part according to the inspection results.
10		No	Go to the next step.
11	Does the engine start with the throttle valve closed?	Yes	Go to Step 26.
11	Does the engine start with the throttle valve closed?	No	Go to the next step.
12	Will the engine start and run smoothly at part throttle?	Yes	Inspect the electronic throttle control system operation. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Repair or replace the malfunctioning part according to the inspection results.
12	Will the engine start and run smoothly at part throttle?	No	Go to the next step.
13	Access RPM PID using the M-MDS. Is RPM PID indicating the engine speed when cranking the engine?	Yes	Go to the next step.
13		No	Inspect the following: Open or short circuit in CKP sensor Open or short circuit between CKP sensor terminal A and body ground Open or short circuit between CKP sensor terminal B and PCM terminal 2W Open or short circuit between CKP sensor terminal C and PCM terminal 2AQ CKP sensor and related wiring harness (See CRANKSHAFT POSITION (CKP) SENSOR INSPECTION [L5] .) Repair or replace the malfunctioning part according to the inspection results. If the CKP sensor and wiring harness are normal: Go to the next step.
14	Visually inspect the CKP sensor and teeth of the crankshaft pulley. (See CRANKSHAFT POSITION (CKP) SENSOR INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
14		No	Go to the next step.
15	Inspect the ignition coil related wiring harness condition (intermittent open or short circuit) for all cylinders. (See IGNITION COIL INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the suspected wiring harnesses.
15		No	Go to the next step.
16	Perform the Spark Test. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Is a strong blue spark visible at each cylinder?	Yes	Go to the next step.
16		No	Repair or replace the malfunctioning part according to the spark test result.
17	Verify the spark plug conditions when the spark plug removed in Step 16. (See SPARK PLUG INSPECTION [L5] .) Is the spark plug wet, covered with carbon or grayish white?	Yes	Spark plug is wet or covered with carbon: Inspect for fuel leakage from fuel injector. Spark plug is grayish white: Inspect the fuel injector for clogging.
17		No	Install the spark plugs on original cylinders, then go to the next step.
18	Visually inspect the exhaust system part. (See EXHAUST SYSTEM INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
18		No	Go to the next step.
19	Inspect the fuel line pressure. (See FUEL LINE PRESSURE INSPECTION [L5] .) Is there any malfunction?	Yes	Zero or low: Inspect the fuel pump relay and the fuel pump circuit. (See RELAY INSPECTION [L5] .) Inspect the fuel line for clogging. If there is a malfunction: Repair or replace the malfunctioning part according to the inspection results. If there is no malfunction: Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [L5] .) High: Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [L5] .)
19		No	Go to the next step.
20	Visually inspect for fuel leakage at the fuel injector O-ring and fuel line. Is the fuel line pressure held after the ignition is off?	Yes	Go to the next step.
20		No	Inspect the fuel injector. (See FUEL INJECTOR INSPECTION [L5] .) If the fuel injector has malfunction: Replace the fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION [L5] .) If the fuel injector is normal: Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [L5] .)
21	Disconnect the vacuum hose between the purge solenoid valve and the intake manifold from the purge solenoid valve side. Plug the open end of the vacuum hose. Turn the ignition switch to the ON position (engine ON). Is the engine stall now eliminated?	Yes	Inspect if the purge solenoid valve is stuck open. (See PURGE SOLENOID VALVE INSPECTION [L5] .) Inspect the evaporative emission control system. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Repair or replace the malfunctioning part according to the inspection results.
21		No	Go to the next step.
22	Is air leakage felt or heard at the intake air system components while racing the engine to higher speed?	Yes	Repair or replace the malfunctioning part according to the inspection results.
22		No	Go to the next step.
23	Inspect the engine condition while tapping the EGR valve housing. Does the engine condition improve?	Yes	Replace the EGR valve. (See EGR VALVE REMOVAL/INSTALLATION [L5] .)
23		No	Go to the next step.
24	Perform the Variable Valve Timing Control System Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Does the variable valve timing control system operate properly?	Yes	Go to the next step.
24		No	Repair or replace the malfunctioning part according to the inspection results.
25	Inspect the engine compression. (See COMPRESSION INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
25		No	Inspect the valve timing. (See VARIABLE VALVE TIMING ACTUATOR INSPECTION [L5] .) Repair or replace the malfunctioning part according to the inspection results.
26	Verify test results. If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [L5] .) If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform 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	Perform the PCM DTC inspection using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [L5] .)
1		No	Go to the next step.
2	Access the ECT PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Start the engine and warm it up to ECT PID value is above 90°C {194°F} . Does the ECT PID increasing dull at thermostat initial opening temperature? Thermostat initial opening temperature: 80- 84°C {176-183°F}	Yes	Inspect characteristic of the ECT sensor. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [L5] .) Repair or replace the malfunctioning part according to the inspection results.
2		No	Thermostat operation is normal: Go to the next step.
3	Is the throttle body free of contamination?	Yes	Inspect for air leakage from the intake air system components while racing the engine to higher speed. Repair or replace the malfunctioning part according to the inspection results.
3	Is the throttle body free of contamination?	No	Clean or replace the throttle body. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [L5] .)
4	Verify test results. If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [L5] .) If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform 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	Start the engine and warm it up completely. Idle the engine for 5 min or more . Does the symptom disappear?	Yes	Symptom troubleshooting is completed (cause of this symptom is that the idle learning for electronic throttle control system is not completed).
1		No	Go to the next step.
2	Verify the following: Electrical connections External fuel shut off or accessory (such as kill switch, alarm) Fuel quality (such as proper octane, contamination, winter/summer blend) Fuses Ignition wiring No air leakage from intake air system PCM ground circuit (1E, 1F, 1G or 1 BE) Proper sealing of intake manifold and components attached to intake manifold: such as EGR valve Smooth operation of throttle valve Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results. Repeat Step 2.
2		No	Go to the next step.
3	Perform the PCM DTC inspection using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [L5] .)
3		No	Go to the next step.
4	Is the engine overheating?	Yes	Go to the symptom troubleshooting "NO.17 COOLING SYSTEM CONCERNS-OVERHEATING". (See NO.17 COOLING SYSTEM CONCERNS-OVERHEATING [L5] .)
4	Is the engine overheating?	No	Go to the next step.
5	Access the MAF PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Drive the vehicle during monitoring the PID. Is the MAF PID value within the specification? (See ON-BOARD DIAGNOSTIC TEST [L5] .)	Yes	Go to the next step.
5		No	Inspect for an open or short circuit in the MAF sensor and related wiring harness. (See MASS AIR FLOW (MAF) SENSOR INSPECTION [L5] .) Repair or replace the malfunctioning part according to the inspection results.
6	NOTE: The following test is for the engine running at rough idle with A/C on. If other symptoms exist, go to the next step. Connect a pressure gauge to the A/C low and high pressure side lines.Start the engine and idle it.Turn the A/C switch on.Measure the low side and high side pressures.Are the pressures within the specifications? (See REFRIGERANT PRESSURE CHECK .)	Yes	Go to the next step.
6		No	If the A/C is always on: Go to the symptom troubleshooting "NO.24 A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY". (See NO.24 A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY [L5] .) For other symptoms: Inspect the following: Refrigerant charging amount Condenser fan operation Repair or replace the malfunctioning part according to the inspection results.
7	Visually inspect the CKP sensor and teeth of the crankshaft pulley. (See CRANKSHAFT POSITION (CKP) SENSOR INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
7		No	Go to the next step.
8	Inspect the ignition coil related wiring harness condition (intermittent open or short circuit) for all cylinders. Is there any malfunction?	Yes	Repair or replace the suspected wiring harness.
8		No	Go to the next step.
9	Inspect the spark plug condition. (See SPARK PLUG INSPECTION [L5] .) Is the spark plug wet, covered with carbon or grayish white?	Yes	Spark plug is wet or covered with carbon: Inspect for fuel leakage from fuel injector. Spark plug is grayish white: Inspect the fuel injector for clogging.
9		No	Install the spark plugs on original cylinders, then go to the next step.
10	Perform the Electronic Throttle Control System Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
10		No	Go to the next step.
11	Inspect the fuel line pressure. (See FUEL LINE PRESSURE INSPECTION [L5] .) Is there any malfunction?	Yes	Zero or low: Inspect the fuel pump relay and the fuel pump circuit. (See RELAY INSPECTION [L5] .) Inspect the fuel line for clogging. If there is a malfunction: Repair or replace the malfunctioning part according to the inspection results. If there is no malfunction: Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [L5] .) High: Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [L5] .)
11		No	Go to the next step.
12	Visually inspect for fuel leakage at the fuel injector O-ring and fuel line. Is the fuel line pressure held after the ignition is off?	Yes	Go to the next step.
12		No	Inspect the fuel injector. (See FUEL INJECTOR INSPECTION [L5] .) If the fuel injector has malfunction: Replace the fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION [L5] .) If the fuel injector is normal: Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [L5] .)
13	Start the engine and idle it. Access the LONGFT1 PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Measure the LONGFT1 PID at idle. Is the LONGFT1 PID value between -14% and +14%?	Yes	Go to the next step.
13		No	Less than specification (too rich): Inspect the EVAP control system. Greater than specification (too lean): Inspect for air leakage at the intake air system components. Repair or replace the malfunctioning part according to the inspection results. If the system is normal: Go to the next step.
14	Disconnect the vacuum hose between the purge solenoid valve and the intake manifold from the purge solenoid valve side. Plug the open end of the vacuum hose. Turn the ignition switch to the ON position (engine ON). Is the engine stall now eliminated?	Yes	Inspect if the purge solenoid valve is stuck open. (See PURGE SOLENOID VALVE INSPECTION [L5] .) Inspect the evaporative emission control system. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Repair or replace the malfunctioning part according to the inspection results.
14		No	Go to the next step.
15	Visually inspect the exhaust system part. (See EXHAUST SYSTEM INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
15		No	Go to the next step.
16	Visually inspect the CMP sensor and teeth of the camshaft. (See CAMSHAFT POSITION (CMP) SENSOR INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
16		No	Go to the next step.
17	Inspect the engine condition while tapping the EGR valve housing. Does the engine condition improve?	Yes	Replace the EGR valve. (See EGR VALVE REMOVAL/INSTALLATION [L5] .)
17		No	Go to the next step.
18	Perform the Variable Valve Timing Control System Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
18		No	Go to the next step.
19	Inspect the engine compression. (See COMPRESSION INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
19		No	Go to the next step.
20	Inspect the PCV valve. (See POSITIVE CRANKCASE VENTILATION (PCV) VALVE INSPECTION [L5] .) Is there any malfunction?	Yes	Replace the PCV valve. (See POSITIVE CRANKCASE VENTILATION (PCV) VALVE REMOVAL/INSTALLATION [L5] .)
20		No	Inspect the valve timing. (See VARIABLE VALVE TIMING ACTUATOR INSPECTION [L5] .) Repair or replace the malfunctioning part according to the inspection results.
21	Verify test results. If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [L5] .) If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform 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
The following test is for the engine running at rough idle with A/C on. If other symptoms exist, go to the next step.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION	RESULTS	ACTION
1	Access the ECT PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Start and warm up the engine to normal operating temperature. Is the ECT PID value between 82-112°C {180-234°F}?	Yes	Go to the next step.
1		No	ECT PID value is higher than 112°C {234°F}: Go to the symptom troubleshooting "NO.17 COOLING SYSTEM CONCERNS-OVERHEATING". (See NO.17 COOLING SYSTEM CONCERNS-OVERHEATING [L5] .) ECT PID value is less than 82°C {180°F}: Go to the symptom troubleshooting "NO.18 COOLING SYSTEM CONCERNS-RUNS COLD". (See NO.18 COOLING SYSTEM CONCERNS-RUNS COLD [L5] .)
2	Perform the PCM DTC inspection using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [L5] .)
2		No	Go to the next step.
3	Access the AC REQ and TR PIDs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Are the PID values normal?	Yes	Go to the next step.
3		No	AC_REQ PID is not specified: Inspect the A/C switch, refrigerant pressure sensor, evaporator temperature sensor and fan switch. (See REFRIGERANT PRESSURE SENSOR INSPECTION [MANUAL AIR CONDITIONER] .) (See REFRIGERANT PRESSURE SENSOR INSPECTION [FULL-AUTO AIR CONDITIONER] .) (See EVAPORATOR TEMPERATURE SENSOR INSPECTION [MANUAL AIR CONDITIONER] .) (See EVAPORATOR TEMPERATURE SENSOR INSPECTION [FULL-AUTO AIR CONDITIONER] .) Inspect communication error between climate control unit and instrument cluster. Inspect communication error between instrument cluster and PCM. TR PID is not specified: Inspect the TR switch. (See TRANSAXLE RANGE (TR) SWITCH INSPECTION [FS5A-EL] .) Inspect communication error between TCM and PCM. Repair or replace the malfunctioning part according to the inspection results.
4	Is there air leakage felt or heard at the intake air system components while racing the engine to higher speed?	Yes	Repair or replace the malfunctioning part according to the inspection results.
4		No	Inspect the following: Electronic throttle control system operation (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) APP sensor (See ACCELERATOR PEDAL POSITION (APP) SENSOR INSPECTION [L5] .) Repair or replace the malfunctioning part according to the inspection results.
5	Verify test results. If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [L5] .) If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform 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 roughly?	Yes	Go to the symptom troubleshooting "NO.8 ENGINE RUNS ROUGH/ROLLING IDLE". (See NO.8 ENGINE RUNS ROUGH/ROLLING IDLE [L5] .)
1	Does the engine idle roughly?	No	Go to the next step.
2	Turn off the A/C switch and fan switch. Does the A/C magnetic clutch engage?	Yes	Go to the symptom troubleshooting "NO.24 A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY." (See NO.24 A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY [L5] .)
2		No	Go to the next step.
3	Verify the following: Proper routing of and no damage to the vacuum lines No air leakage from the intake air system Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
3		No	Go to the next step.
4	Perform the PCM DTC inspection using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [L5] .)
4		No	Go to the next step.
5	Perform the Electronic Throttle Control System Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
5		No	Go to the next step.
6	Disconnect the vacuum hose between the purge solenoid valve and the intake manifold from purge solenoid valve side. Plug the open end of the vacuum hose. Drive the vehicle. Does the engine condition improve?	Yes	Inspect the evaporative emission control system. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Repair or replace the malfunctioning part according to the inspection results.
6		No	Go to the next step.
7	Access the following PIDs using the M-MDS: APP1 APP2 TP REL MAF VSS (See ON-BOARD DIAGNOSTIC TEST [L5] .) Are the PID values normal?	Yes	Go to the next step.
7		No	APP1, APP2 PIDs are not specified: Inspect the APP sensor. (See ACCELERATOR PEDAL POSITION (APP) SENSOR INSPECTION [L5] .) TP_REL is not specified: Inspect the TP sensor. (See THROTTLE POSITION (TP) SENSOR INSPECTION [L5] .) MAF PID is not specified: Inspect the MAF sensor. (See MASS AIR FLOW (MAF) SENSOR INSPECTION [L5] .) VSS PID is not specified: Inspect the VSS. (See VEHICLE SPEED SENSOR (VSS) INSPECTION [AW6A-EL, AW6AX-EL] .) Repair or replace the malfunctioning part according to the inspection results.
8	Access the AC REQ and TR PIDs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Are the PID values normal?	Yes	Go to the next step.
8		No	AC_REQ PID is not specified: Inspect the A/C switch, refrigerant pressure sensor, evaporator temperature sensor and fan switch. (See REFRIGERANT PRESSURE SENSOR INSPECTION [MANUAL AIR CONDITIONER] .) (See REFRIGERANT PRESSURE SENSOR INSPECTION [FULL-AUTO AIR CONDITIONER] .) (See EVAPORATOR TEMPERATURE SENSOR INSPECTION [MANUAL AIR CONDITIONER] .) (See EVAPORATOR TEMPERATURE SENSOR INSPECTION [FULL-AUTO AIR CONDITIONER] .) Inspect communication error between climate control unit and instrument cluster. Inspect communication error between instrument cluster and PCM. TR PID is not specified: Inspect the TR switch. (See TRANSAXLE RANGE (TR) SWITCH INSPECTION [FS5A-EL] .) Inspect communication error between TCM and PCM. Repair or replace the malfunctioning part according to the inspection results.
9	Verify test results. If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [L5] .) If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform 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	Verify the following: Air cleaner element Electrical connections Fuel quality (such as proper octane, contamination, winter/summer blend) Ignition wiring No air leakage from intake air system No restriction of the intake air system Proper sealing of intake manifold and components attached to intake manifold: such as EGR valve Smooth operation of the throttle valve Vacuum connection Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results. Repeat Step 1.
1		No	Go to the next step.
2	Perform the PCM DTC inspection using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [L5] .)
2		No	Go to the next step.
3	Is the engine overheating?	Yes	Go to the symptom troubleshooting "NO.17 COOLING SYSTEM CONCERNS-OVERHEATING". (See NO.17 COOLING SYSTEM CONCERNS-OVERHEATING [L5] .)
3	Is the engine overheating?	No	Go to the next step.
4	Access the following PIDs using the M-MDS: APP1 APP2 TP_REL RPM MAF MAP BARO VPWR VSS (See ON-BOARD DIAGNOSTIC TEST [L5] .) Are the PID values normal?	Yes	Go to the next step.
4		No	APP1, APP2 PIDs are not specified: Inspect if the output signal from the APP sensor changes smoothly. (See ACCELERATOR PEDAL POSITION (APP) SENSOR INSPECTION [L5] .) TP_REL PID is not specified: Inspect if the output signal from the TP sensor changes smoothly. (See THROTTLE POSITION (TP) SENSOR INSPECTION [L5] .) RPM PID is not specified: Inspect the CKP sensor and related wiring harness for vibration or an intermittent open/short circuit. (See CRANKSHAFT POSITION (CKP) SENSOR INSPECTION [L5] .) MAF PID is not specified: Inspect for an intermittent open circuit of the MAF sensor and the related wiring harness. (See MASS AIR FLOW (MAF) SENSOR INSPECTION [L5] .) MAP PID is not specified: Inspect the MAP sensor and related wiring harness for vibration or an intermittent open/short circuit. (See MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR INSPECTION [L5] .) BARO PID is not specified: Replace the PCM. (See PCM REMOVAL/INSTALLATION [L5] .) VPWR PID is not specified: Inspect for an intermittent open circuit. VSS PID is not specified: Inspect for an intermittent open circuit in the VSS and related wiring harness. (See VEHICLE SPEED SENSOR (VSS) INSPECTION [AW6A-EL, AW6AX-EL] .) Repair or replace the malfunctioning part according to the inspection results.
5	Visually inspect the CKP sensor and teeth of the crankshaft pulley. (See CRANKSHAFT POSITION (CKP) SENSOR INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
5		No	Go to the next step.
6	Inspect the spark plug condition. (See SPARK PLUG INSPECTION [L5] .) Is the spark plug wet, covered with carbon or grayish white?	Yes	Spark plug is wet or covered with carbon: Inspect for fuel leakage from fuel injector. Spark plug is grayish white: Inspect the fuel injector for clogging. Repair or replace the malfunctioning part according to the inspection results.
6		No	Install the spark plugs on original cylinders, then go to the next step.
7	Perform the Electronic Throttle Control System Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
7		No	Go to the next step.
8	Visually inspect the exhaust system part. (See EXHAUST SYSTEM INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
8		No	Go to the next step.
9	Inspect the fuel line pressure. (See FUEL LINE PRESSURE INSPECTION [L5] .) Is there any malfunction?	Yes	Zero or low: Inspect the fuel pump relay and the fuel pump circuit. (See RELAY INSPECTION [L5] .) Inspect the fuel line for clogging. If there is a malfunction: Repair or replace the malfunctioning part according to the inspection results. If there is no malfunction: Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [L5] .) High: Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [L5] .)
9		No	Go to the next step.
10	Visually inspect for fuel leakage at the fuel injector O-ring and fuel line. Is the fuel line pressure held after the ignition is off?	Yes	Go to the next step.
10		No	Inspect the fuel injector. (See FUEL INJECTOR INSPECTION [L5] .) If the fuel injector has malfunction: Replace the fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION [L5] .) If the fuel injector is normal: Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [L5] .)
11	NOTE: Following test is for stall concerns with the A/C on. If other symptoms exist, go to the next step. Connect pressure gauges to the A/C low side and high side pressure lines.Turn the A/C on and measure the low side and high side pressures.Are the pressures within the specifications? (See REFRIGERANT PRESSURE CHECK .)	Yes	Go to the next step.
11		No	If the A/C is always on: Go to the symptom troubleshooting "NO.24 A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY". (See NO.24 A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY [L5] .) For other symptoms: Inspect the following: Refrigerant charging amount Condenser fan operation Repair or replace the malfunctioning part according to the inspection results.
12	NOTE: The following test should be performed for symptoms with the cruise control on. If other symptoms exist, go to the next step. Inspect the cruise control system. (See CRUISE CONTROL SWITCH INSPECTION [L5] .)Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
12		No	Go to the next step.
13	Inspect the A/F sensor. (See AIR FUEL RATIO (A/F) SENSOR INSPECTION [L5] .) Is there any malfunction?	Yes	Inspect for followings: Exhaust gas leakage between exhaust manifold and A/F sensor Loose installation of A/F sensor If there is no malfunction: Replace the A/F sensor. (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [L5] .) If there is a malfunction: Repair or replace the malfunctioning part according to the inspection results.
13		No	Go to the next step.
14	Inspect the evaporative hose between the fuel tank and the purge solenoid valve. Does the fuel flow into the evaporative hose?	Yes	Inspect the fuel shut-off valve. (See FUEL SHUT-OFF VALVE INSPECTION [L5] .) Repair or replace the malfunctioning part according to the inspection results.
14		No	Go to the next step.
15	Disconnect the vacuum hose between the purge solenoid valve and the intake manifold from the purge solenoid valve side. Plug the open end of the vacuum hose. Turn the ignition switch to the ON position (engine ON). Is the engine stall now eliminated?	Yes	Inspect if the purge solenoid valve is stuck open. (See PURGE SOLENOID VALVE INSPECTION [L5] .) Inspect the evaporative emission control system. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Repair or replace the malfunctioning part according to the inspection results.
15		No	Go to the next step.
16	Visually inspect the CMP sensor and teeth of the camshaft. (See CAMSHAFT POSITION (CMP) SENSOR INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
16		No	Go to the next step.
17	Perform the Variable Valve Timing Control System Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
17		No	Go to the next step.
18	Perform the EGR Control System Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
18		No	Go to the next step.
19	Inspect the engine compression. (See COMPRESSION INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
19		No	Go to the next step.
20	Inspect the PCV valve. (See POSITIVE CRANKCASE VENTILATION (PCV) VALVE INSPECTION [L5] .) Is there any malfunction?	Yes	Replace the PCV valve and the oil separator as a single unit, then go to the next step. (See POSITIVE CRANKCASE VENTILATION (PCV) VALVE REMOVAL/INSTALLATION [L5] .)
20		No	Inspect the following: Valve timing Internal transaxle part EGR valve (mechanical stuck) Engine mounts Check valve (two-way) Repair or replace the malfunctioning part according to the inspection results.
21	Verify test results. If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [L5] .) If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform 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
Following test is for stall concerns with the A/C on. If other symptoms exist, go to the next step.

NOTE
The following test should be performed for symptoms with the cruise control on. If other symptoms exist, go to the next step.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION	RESULTS	ACTION
1	Verify the following: Fuel quality (such as proper octane, contamination, winter/summer blend) No air leakage from the intake air system No restriction of the intake air system Proper sealing of the intake manifold and components attached to the intake manifold; such as the EGR valve Restriction in the intake air system (such as the air cleaner element, fresh air duct) Vacuum connection Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results. Repeat Step 1.
1		No	Go to the next step.
2	Perform the PCM DTC inspection using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [L5] .)
2		No	Go to the next step.
3	Is the engine overheating?	Yes	Go to the symptom troubleshooting "NO.17 COOLING SYSTEM CONCERNS-OVERHEATING". (See NO.17 COOLING SYSTEM CONCERNS-OVERHEATING [L5] .)
3	Is the engine overheating?	No	Go to the next step.
4	Access the following PIDs using the M-MDS: APP1 APP2 TP_REL RPM MAF VPWR VSS (See ON-BOARD DIAGNOSTIC TEST [L5] .) Are the PID values normal?	Yes	Go to the next step.
4		No	APP1, APP2 PIDs are not specified: Inspect if the output signal from the APP sensor changes smoothly. (See ACCELERATOR PEDAL POSITION (APP) SENSOR INSPECTION [L5] .) TP_REL PID is not specified: Inspect if the output signal from the TP sensor changes smoothly. (See THROTTLE POSITION (TP) SENSOR INSPECTION [L5] .) RPM PID is not specified: Inspect the CKP sensor and related wiring harness for vibration or an intermittent open/short circuit. (See CRANKSHAFT POSITION (CKP) SENSOR INSPECTION [L5] .) MAF PID is not specified: Inspect for an intermittent open circuit of the MAF sensor and the related wiring harness. (See MASS AIR FLOW (MAF) SENSOR INSPECTION [L5] .) VPWR PID is not specified: Inspect for an intermittent open circuit. VSS PID is not specified: Inspect for an intermittent open circuit in the VSS and related wiring harness. (See VEHICLE SPEED SENSOR (VSS) INSPECTION [FS5A-EL] .) Repair or replace the malfunctioning part according to the inspection results.
5	Visually inspect the CKP sensor and teeth of the crankshaft pulley. (See CRANKSHAFT POSITION (CKP) SENSOR INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
5		No	Go to the next step.
6	Inspect the spark plug condition. (See SPARK PLUG INSPECTION [L5] .) Is the spark plug wet, covered with carbon or grayish white?	Yes	Spark plug is wet or covered with carbon: Inspect for fuel leakage from fuel injector. Spark plug is grayish white: Inspect the fuel injector for clogging. Repair or replace the malfunctioning part according to the inspection results.
6		No	Install the spark plugs on original cylinders, then go to the next step.
7	Perform the Electronic Throttle Control System Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
7		No	Go to the next step.
8	Visually inspect the exhaust system part. (See EXHAUST SYSTEM INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
8		No	Go to the next step.
9	Inspect the fuel line pressure. (See FUEL LINE PRESSURE INSPECTION [L5] .) Is there any malfunction?	Yes	Zero or low: Inspect the fuel pump relay and the fuel pump circuit. (See RELAY INSPECTION [L5] .) Inspect the fuel line for clogging. If there is a malfunction: Repair or replace the malfunctioning part according to the inspection results. If there is no malfunction: Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [L5] .) High: Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [L5] .)
9		No	Go to the next step.
10	Perform the Variable Tumble Control Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
10		No	Go to the next step.
11	Perform the Variable Intake Air Control Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
11		No	Go to the next step.
12	NOTE: Following test is for stall concerns with the A/C on. If other symptoms exist, go to the next step. Connect pressure gauges to the A/C low side and high side pressure lines.Turn the A/C on and measure the low side and high side pressures.Are the pressures within the specifications? (See REFRIGERANT PRESSURE CHECK .)	Yes	Go to the next step.
12		No	If the A/C is always on: Go to the symptom troubleshooting "NO.24 A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY". (See NO.24 A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY [L5] .) For other symptoms: Inspect the following: Refrigerant charging amount Condenser fan operation Repair or replace the malfunctioning part according to the inspection results.
13	Perform the A/C Cut-off Control System Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Is there any malfunction?	Yes	Inspect the A/C cut-off system components. Repair or replace the malfunctioning part according to the inspection results.
13		No	Go to the next step.
14	Disconnect the vacuum hose between the purge solenoid valve and the intake manifold from the purge solenoid valve side. Plug the open end of the vacuum hose. Turn the ignition switch to the ON position (engine ON). Is the engine stall now eliminated?	Yes	Inspect if the purge solenoid valve is stuck open. (See PURGE SOLENOID VALVE INSPECTION [L5] .) Inspect the evaporative emission control system. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Repair or replace the malfunctioning part according to the inspection results.
14		No	Go to the next step.
15	Visually inspect the CMP sensor and teeth of the camshaft. (See CAMSHAFT POSITION (CMP) SENSOR INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
15		No	Go to the next step.
16	Perform the EGR Control System Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
16		No	Go to the next step.
17	Perform the Variable Valve Timing Control System Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
17		No	Go to the next step.
18	Inspect the engine compression. (See COMPRESSION INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
18		No	Go to the next step.
19	Inspect the PCV valve. (See POSITIVE CRANKCASE VENTILATION (PCV) VALVE INSPECTION [L5] .) Is there any malfunction?	Yes	Replace the PCV valve and the oil separator as a single unit, then go to the next step. (See POSITIVE CRANKCASE VENTILATION (PCV) VALVE REMOVAL/INSTALLATION [L5] .)
19		No	Inspect the following: Valve timing Internal transaxle part Brake system for dragging Repair or replace the malfunctioning part according to the inspection results.
20	Verify test results. If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [L5] .) If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform 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
Following test is for stall concerns with the A/C on. If other symptoms exist, go to the next step.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION	RESULTS	ACTION
1	Access the ECT PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Verify ECT PID value is less than 116°C {241°F} during driving. Is the ECT PID value less than the specification?	Yes	Go to the next step.
1		No	Go to the symptom troubleshooting "NO.17 COOLING SYSTEM CONCERNS-OVERHEATING". (See NO.17 COOLING SYSTEM CONCERNS-OVERHEATING [L5] .)
2	Access the IAT and MAF PIDs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Are the PIDs normal? (See PCM INSPECTION [L5] .)	Yes	Go to the next step.
2		No	IAT PID is not specified: Inspect the IAT sensor. (See INTAKE AIR TEMPERATURE (IAT) SENSOR INSPECTION [L5] .) MAF PID is not specified: Inspect the MAF sensor. (See MASS AIR FLOW (MAF) SENSOR INSPECTION [L5] .) Repair or replace the malfunctioning part according to the inspection results.
3	Perform the PCM DTC inspection using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [L5] .)
3		No	Go to the next step.
4	Inspect the engine compression. (See COMPRESSION INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
4		No	Go to the next step.
5	Inspect the fuel line pressure. (See FUEL LINE PRESSURE INSPECTION [L5] .) Is there any malfunction?	Yes	Zero or low: Inspect the fuel pump relay and the fuel pump circuit. (See RELAY INSPECTION [L5] .) Inspect the fuel line for clogging. If there is a malfunction: Repair or replace the malfunctioning part according to the inspection results. If there is no malfunction: Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [L5] .) High: Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [L5] .)
5		No	Go to the next step.
6	Inspect the KS. (See KNOCK SENSOR (KS) INSPECTION [L5] .) Is there any malfunction?	Yes	Replace the KS. (See KNOCK SENSOR (KS) REMOVAL/INSTALLATION [L5] .)
6		No	Inspect ignition timing. (See ENGINE TUNE-UP [L5] .) Repair or replace the malfunctioning part according to the inspection results.
7	Verify test results. If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [L5] .) If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform 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 ATF level Brake dragging Coolant level Fuel quality Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results. Repeat Step 1.
1		No	Go to the next step.
2	Perform the PCM DTC inspection using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [L5] .)
2		No	Go to the next step.
3	Access the ECT PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Drive the vehicle while monitoring the PID. Is the ECT PID value within the specification? (See PCM INSPECTION [L5] .)	Yes	Go to the next step.
3		No	Inspect for coolant leakage, and inspect the cooling fan and condenser fan operations or and inspect the thermostat operation. Repair or replace the malfunctioning part according to the inspection results.
4	Perform the Spark Test. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Is a strong blue spark visible at each cylinder?	Yes	Go to the next step.
4		No	Repair or replace the malfunctioning part according to the inspection results. Repeat Step 1.
5	Inspect the fuel line pressure. (See FUEL LINE PRESSURE INSPECTION [L5] .) Is there any malfunction?	Yes	Zero or low: Inspect the fuel pump relay and the fuel pump circuit. (See RELAY INSPECTION [L5] .) Inspect the fuel line for clogging. If there is a malfunction: Repair or replace the malfunctioning part according to the inspection results. If there is no malfunction: Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [L5] .) High: Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [L5] .)
5		No	Go to the next step.
6	Perform the Variable Tumble Control Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
6		No	Go to the next step.
7	Perform the Variable Valve Timing Control System Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
7		No	Go to the next step.
8	Perform the Variable Intake Air Control Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
8		No	Go to the next step.
9	Visually inspect the exhaust system parts. Are there any deformed exhaust system parts?	Yes	Repair or replace the malfunctioning part according to the inspection results.
9		No	Go to the next step.
10	Inspect the MAF sensor for contamination. Is there any contamination?	Yes	Replace the MAF/IAT sensor. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [L5] .)
10		No	Go to the next step.
11	Inspect the engine compression. (See COMPRESSION INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
11		No	Go to the next step.
12	Inspect the PCV valve. (See POSITIVE CRANKCASE VENTILATION (PCV) VALVE INSPECTION [L5] .) Is there any malfunction?	Yes	Replace the PCV valve and the oil separator as a single unit, then go to the next step. (See POSITIVE CRANKCASE VENTILATION (PCV) VALVE REMOVAL/INSTALLATION [L5] .)
12		No	Inspect the valve timing. (See STARTER INSPECTION [L5] .) Repair or replace the malfunctioning part according to the inspection results.
13	Verify test results. If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [L5] .) If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform 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: Electrical connections Intake air system and air cleaner element concerns: obstructions, leakage or soiling Proper maintenance schedule followed Vacuum lines for leakage or blockage Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results. Repeat Step 1.
1		No	Go to the next step.
2	Perform the PCM DTC inspection using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [L5] .)
2		No	Go to the next step.
3	Is any other driveability concern present?	Yes	Go to the appropriate symptom troubleshooting. (See SYMPTOM DIAGNOSTIC INDEX [L5] .)
3	Is any other driveability concern present?	No	Go to the next step.
4	Access the ECT PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Drive the vehicle while monitoring the PID. Is the ECT PID value within the specification? (See PCM INSPECTION [L5] .)	Yes	Go to the next step.
4		No	Inspect for coolant leakage, and inspect the cooling fan and condenser fan operations or and inspect the thermostat operation. Repair or replace the malfunctioning part according to the inspection results.
5	Inspect the fuel-filler cap. (See FUEL-FILLER CAP INSPECTION [L5] .) Is there any leakage at the fuel-filler cap?	Yes	Replace the fuel-filler cap.
5		No	Go to the next step.
6	Inspect the A/F sensor. (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [L5] .) Is there any malfunction?	Yes	Inspect for followings: Exhaust gas leakage between exhaust manifold and A/F sensor Loose installation of A/F sensor If there is no malfunction: Replace the A/F sensor. (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [L5] .) If there is a malfunction: Repair or replace the malfunctioning part according to the inspection results.
6		No	Go to the next step.
7	Perform the Spark Test. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Is a strong blue spark visible at each cylinder?	Yes	Go to the next step.
7		No	Repair or replace the malfunctioning part according to the inspection results.
8	Inspect the fuel line pressure. (See FUEL LINE PRESSURE INSPECTION [L5] .) Is there any malfunction?	Yes	Zero or low: Inspect the fuel pump relay and the fuel pump circuit. (See RELAY INSPECTION [L5] .) Inspect the fuel line for clogging. If there is a malfunction: Repair or replace the malfunctioning part according to the inspection results. If there is no malfunction: Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [L5] .) High: Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [L5] .)
8		No	Go to the next step.
9	Inspect for fuel saturation inside the charcoal canister. Is there an excess amount of liquid fuel present in canister?	Yes	Replace the charcoal canister. (See CHARCOAL CANISTER REMOVAL/INSTALLATION [L5] .)
9		No	Inspect the fuel tank vent system, then go to the next step. (See FUEL TANK INSPECTION [L5] .)
10	Visually inspect the exhaust system parts. Are there any deformed exhaust system parts?	Yes	Repair or replace the malfunctioning part according to the inspection results.
10		No	Go to the next step.
11	Inspect the TWC. (See EXHAUST SYSTEM INSPECTION [L5] .) Is there any malfunction?	Yes	Replace the TWC. (See EXHAUST SYSTEM REMOVAL/INSTALLATION [L5] .)
11		No	Go to the next step.
12	Perform the EGR Control System Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Is there any malfunction?	Yes	Go to the next step.
12		No	Inspect the cause. Repair or replace the malfunctioning part according to the inspection results.
13	Inspect the engine compression. (See COMPRESSION INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
13		No	Go to the next step.
14	Inspect the PCV valve. (See POSITIVE CRANKCASE VENTILATION (PCV) VALVE INSPECTION [L5] .) Is there any malfunction?	Yes	Replace the PCV valve and the oil separator as a single unit, then go to the next step. (See POSITIVE CRANKCASE VENTILATION (PCV) VALVE REMOVAL/INSTALLATION [L5] .)
14		No	Inspect the valve timing. (See TIMING CHAIN REMOVAL/INSTALLATION [L5] .) Repair or replace the malfunctioning part according to the inspection results.
15	Verify test results. If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [L5] .) If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform 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: External leakage Proper dipstick Proper engine oil viscosity Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results. Repeat Step 1.
1		No	Go to the next step.
2	Inspect the PCV valve. (See POSITIVE CRANKCASE VENTILATION (PCV) VALVE INSPECTION [L5] .) Is there any malfunction?	Yes	Replace the PCV valve and the oil separator as a single unit, then go to the next step. (See PURGE SOLENOID VALVE REMOVAL/INSTALLATION [L5] .)
2		No	Inspect the internal engine parts such as valves, valve guides, valve stem seals, cylinder head drain passage, and piston rings. Repair or replace the malfunctioning part according to the inspection results.
3	Verify test results. If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [L5] .) If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform 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: Collapsed or restricted radiator hoses Coolant leakage Engine coolant level Fan rotational direction Fuses Overflow system Radiator condition Radiator pressure cap Water and anti-freeze mixture Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results. Repeat Step 1.
1		No	Go to the next step.
2	Perform the PCM, climate control unit, instrument cluster and multi information display DTC inspection using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) (See DTC DISPLAY .) (See DTC INSPECTION [INSTRUMENT CLUSTER] .) (See DTC INSPECTION [MULTI INFORMATION DISPLAY] .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [L5] .) (See DTC TABLE .) (See DTC TABLE [INSTRUMENT CLUSTER] .) (See DTC TABLE [MULTI INFORMATION DISPLAY] .)
2		No	Go to the next step.
3	Start the engine and idle it. Turn the A/C switch on and set the blower fan to any speed. Does the magnetic clutch engage?	Yes	Go to Step 11.
3		No	Inspect the following: Refrigerant charging amount Open circuit in the wiring harness between the A/C relay and PCM terminal 11 Seized A/C magnetic clutch A/C magnetic clutch Repair or replace the malfunctioning part according to the inspection results. If all items are normal: Go to the next step.
4	Access the PCM PID AC REQ using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Start the engine and idle it. Monitor the AC_REQ PID while turning on and off the air conditioner by switching the control panel. Does the AC_REQ PID change according to air control panel switching? (See PCM INSPECTION [L5] .)	Yes	Go to Step 11.
4		No	Manual air conditioner: Go to Step 8. Full-auto air conditioner: Go to the next step.
5	Verify the multi information display indication of A/C system while turning on and off the air conditioner by switching the control panel. Does the multi information display indicate properly?	Yes	Replace the instrument cluster (instrument cluster does not receive A/C request signal from climate control unit or transmit it to PCM). (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION .)
5		No	Go to the next step.
6	Inspect the multi information display. (See MULTI INFORMATION DISPLAY INPUT/OUTPUT CHECK MODE .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
6		No	Go to the next step.
7	Access the climate control unit PIDs EVAP_TEMP and AC_PRES using the M-MDS. (See PID/DATA MONITOR DISPLAY .) Monitor the EVAP_TEMP and AC_PRES PIDs while turning on and off the air conditioner by switching the control panel. Is the PIDs normal? (See PID/DATA MONITOR TABLE .)	Yes	Replace the climate control unit (A/C switch malfunction or climate control unit does not determine A/C request or transmit the A/C request signal.). (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER] .)
7		No	Repair or replace the malfunctioning part according to the inspection results.
8	Remove the climate control unit. (See CLIMATE CONTROL UNIT REMOVAL [MANUAL AIR CONDITIONER] .) Reconnect the climate control unit connector. Start the engine and idle it. Measure the voltage at the climate control unit terminal J while turning on and off the air conditioner by switching the control panel. Is the voltage change in specified according to air control panel switching? (See PCM INSPECTION [L5] .)	Yes	Replace the instrument cluster (instrument cluster does not receive A/C request signal from climate control unit or transmit it to PCM). (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION .)
8		No	Go to the next step.
9	Inspect for following part and related harness: Refrigerant pressure sensor (climate control unit terminal N) Evaporator temperature sensor (climate control unit terminal I) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
9		No	Go to the next step.
10	Inspect for open or short circuit between climate control unit terminal J (wiring harness-side) and BCM terminal 3L (wiring harness-side). Is there any malfunction?	Yes	Repair or replace the suspected wiring harness.
10		No	Replace the climate control unit (A/C switch malfunction or climate control unit does not determine A/C request or transmit the A/C request signal.). (See CLIMATE CONTROL UNIT REMOVAL [MANUAL AIR CONDITIONER] .) (See CLIMATE CONTROL UNIT INSTALLATION [MANUAL AIR CONDITIONER] .)
11	Perform the Cooling Fan Control System Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
11		No	Go to the next step.
12	Inspect the drive belt. (See DRIVE BELT INSPECTION [L5] .) Is there any malfunction?	Yes	Replace the drive belt. (See DRIVE BELT REMOVAL/INSTALLATION [L5] .)
12		No	Go to the next step.
13	Inspect the leakage around the heater unit in the passenger compartment. Is there any leakage?	Yes	Repair or replace the malfunctioning part according to the inspection results.
13		No	Go to the next step.
14	Inspect the leakage at the coolant hoses and/or radiator. Is there any leakage?	Yes	Repair or replace the malfunctioning part according to the inspection results.
14		No	Go to the next step.
15	Cool down the engine. Remove the thermostat and inspect operation. (See THERMOSTAT REMOVAL/INSTALLATION [L5] .) (See THERMOSTAT INSPECTION [L5] .) Is there any malfunction?	Yes	Replace the thermostat. (See THERMOSTAT REMOVAL/INSTALLATION [L5] .)
15		No	Install the thermostat, then go to the next step. (See THERMOSTAT REMOVAL/INSTALLATION [L5] .)
16	Access the ECT PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Inspect for both ECT PID and temperature gauge readings. Does the ECT PID accord with temperature gauge readings?	Yes	The engine coolant temperature and thermostat are normal: Inspect the engine block for leakage or blockage. Repair or replace the malfunctioning part according to the inspection results.
16		No	If the temperature gauge on instrument cluster indicates normal but the ECT PID is not same as temperature gauge reading: Inspect the ECT sensor. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION [L5] .) Replace the ECT sensor, if necessary. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION [L5] .) If the temperature gauge on instrument cluster indicates overheating but the ECT PID is normal: Inspect the instrument cluster. (See INSTRUMENT CLUSTER INSPECTION .) Replace the instrument cluster, if necessary. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION .)
17	Verify test results. If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [L5] .) If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform 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 customer complaint "Lack of passenger compartment heat" only?	Yes	Inspect A/C and heater system. Repair or replace the malfunctioning part according to the inspection results.
1		No	Go to the next step.
2	Does the engine speed continue at fast idle?	Yes	Go to the symptom troubleshooting "NO.9 FAST IDLE/RUNS ON". (See NO.9 FAST IDLE/RUNS ON [L5] .)
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 [L5] .) (See THERMOSTAT INSPECTION [L5] .) Is there any malfunction?	Yes	Replace the thermostat. (See THERMOSTAT REMOVAL/INSTALLATION [L5] .)
3		No	Go to the next step.
4	Inspect the cooling fan control system operation. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
4		No	Access the ECT PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Inspect for both ECT PID and temperature gauge readings. If the temperature gauge on instrument cluster indicates normal but the ECT PID is not same as temperature gauge reading: Inspect the ECT sensor. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [L5] .) Replace the ECT sensor, if necessary. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION [L5] .) If the temperature gauge on instrument cluster indicates overheating but the ECT PID is normal: Inspect the instrument cluster. (See INSTRUMENT CLUSTER INSPECTION .) Replace the instrument cluster, if necessary. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION .)
5	Verify test results. If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [L5] .) If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform 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 the smoke coming from the exhaust system?	Blue	Burning oil is indicated: Go to the next step.
		White	Water in the combustion is indicated: Go to Step 3.
		Black	Rich fuel mixture is indicated: Go to Step 4.
2	Inspect the PCV valve. (See POSITIVE CRANKCASE VENTILATION (PCV) VALVE INSPECTION [L5] .) Is there any malfunction?	Yes	Replace the PCV valve and the oil separator as a single unit, then go to the next step. (See POSITIVE CRANKCASE VENTILATION (PCV) VALVE REMOVAL/INSTALLATION [L5] .)
2		No	Inspect the following: Blocked oil drain passage in the cylinder head Damaged cylinder bore Damaged valve guide, stems or valve seals Piston ring is not seated, seized or worn. Repair or replace the malfunctioning part according to the inspection results. If other drivability symptoms are present: Return to the diagnostic index to service any additional symptoms.
3	Does the cooling system hold pressure?	Yes	Inspect the following: Cracked or porous engine block Cylinder head gasket leakage Intake manifold gasket leakage If other drivability symptoms are present: Return to the diagnostic index to service any additional symptoms.
3	Does the cooling system hold pressure?	No	Inspect for cause.
4	Inspect the following: Air cleaner restriction Collapsed or restricted intake air system Restricted fuel return line Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results. Repeat Step 4.
4		No	Go to the next step.
5	Perform the PCM DTC inspection using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [L5] .)
5		No	Go to the next step.
6	Inspect the fuel line pressure. (See FUEL LINE PRESSURE INSPECTION [L5] .) Is there any malfunction?	Yes	Zero or low: Inspect the fuel pump relay and the fuel pump circuit. (See RELAY INSPECTION [L5] .) Inspect the fuel line for clogging. If there is a malfunction: Repair or replace the malfunctioning part according to the inspection results. If there is no malfunction: Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [L5] .) High: Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [L5] .)
6		No	Go to the next step.
7	Perform the Spark Test. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Is a strong blue spark visible at each cylinder?	Yes	Go to the next step.
7		No	Repair or replace the malfunctioning part according to the inspection results.
8	Inspect the CMP sensor. (See CAMSHAFT POSITION (CMP) SENSOR INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
8		No	Go to the next step.
9	Measure the compression pressure for each cylinder. (See COMPRESSION INSPECTION [L5] .) Are compression pressures within the specification?	Yes	Inspect the fuel injector for each cylinder. (See FUEL INJECTOR INSPECTION [L5] .) Replace the suspected fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION [L5] .)
9		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 Repair or replace the malfunctioning part according to the inspection results.
10	Verify test results. If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [L5] .) If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform 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 fuel line pressure. (See FUEL LINE PRESSURE INSPECTION [L5] .) Is there any malfunction?	Yes	Zero or low: Inspect the fuel pump relay and the fuel pump circuit. (See RELAY INSPECTION [L5] .) Inspect the fuel line for clogging. If there is a malfunction: Repair or replace the malfunctioning part according to the inspection results. If there is no malfunction: Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [L5] .) High: Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [L5] .)
1		No	Go to the next step.
2	Visually inspect for fuel leakage at the fuel injector O-ring and fuel line. Is the fuel line pressure held after the ignition is off?	Yes	Go to the next step.
2		No	Inspect the fuel injector. (See FUEL INJECTOR INSPECTION [L5] .) If the fuel injector has malfunction: Replace the fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION [L5] .) If the fuel injector is normal: Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [L5] .)
3	Inspect for blockage/restriction or an open circuit in the wiring harness between the engine vacuum port and the charcoal canister. Inspect for blockage in the fuel tank vent system. Is there any malfunction?	Yes	Replace the vacuum hose.
3		No	Go to the next step.
4	Inspect the purge solenoid valve. (See PURGE SOLENOID VALVE INSPECTION [L5] .) Is there any malfunction?	Yes	Replace the purge solenoid valve. (See PURGE SOLENOID VALVE REMOVAL/INSTALLATION [L5] .)
4		No	Go to the next step.
5	Perform the PCM DTC inspection using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [L5] .)
5		No	Inspect the charcoal canister for fuel saturation. If an excess amount of liquid fuel is present: Replace the charcoal canister. (See CHARCOAL CANISTER REMOVAL/INSTALLATION [L5] .)
6	Verify test results. If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [L5] .) If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform 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 a squealing, click or chirping sound present?	Yes	Inspect the following: Engine oil level Drive belt tension Generator installation Splash shield or under cover looseness Repair or replace the malfunctioning part according to the inspection results.
1	Is a squealing, click or chirping sound present?	No	Go to the next step.
2	Is a rumbling or grinding noise present?	Yes	Inspect the following: Drive belt tension (See DRIVE BELT INSPECTION [L5] .) Loose parts in engine compartment Power steering system fluid revel If there is no malfunction: Perform the power steering fluid line air bleed. (See AIR BLEEDING .) If there is a malfunction: Repair or replace the malfunctioning part according to the inspection results.
2	Is a rumbling or grinding noise present?	No	Go to the next step.
3	Is a rattling noise present?	Yes	Inspect the rattling location for loose parts. Repair or replace the malfunctioning part according to the inspection results.
3	Is a rattling noise present?	No	Go to the next step.
4	Is a hissing noise present?	Yes	Inspect the following: Intake air system leakage Spark plug looseness Vacuum leakage Repair or replace the malfunctioning part according to the inspection results.
4	Is a hissing noise present?	No	Go to the next step.
5	Is a rapping or roar noise present?	Yes	Inspect for looseness in the following: Dynamic dumper Exhaust system Intake air system Repair or replace the malfunctioning part according to the inspection results.
5	Is a rapping or roar noise present?	No	Go to the next step.
6	Is a knocking noise present?	Yes	Go to the symptom troubleshooting "NO.13 KNOCKING/PINGING-ACCELERATION/CRUISE". (See NO.13 KNOCKING/PINGING-ACCELERATION/CRUISE [L5] .)
6	Is a knocking noise present?	No	If the noise comes from inside the engine: Inspect the tappet noise. Repair or replace the malfunctioning part according to the inspection results.
7	Verify test results. If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [L5] .) If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform 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 Drive belt and pulleys Engine mounts Exhaust system mounts Generator Is there any malfunction?	Yes	Readjust or retighten engine mount installation position. Repair or replace the malfunctioning part if necessary for other parts.
1		No	Inspect the following systems: Wheels ATX Driveline Suspension Repair or replace the malfunctioning part according to the inspection results.
2	Verify test results. If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [L5] .) If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform 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	Retrieve the PCM, BCM, instrument cluster and climate control unit DTCs. (See ON-BOARD DIAGNOSTIC TEST [L5] .) (See DTC INSPECTION [BCM] .) (See DTC INSPECTION [INSTRUMENT CLUSTER] .) (See DTC DISPLAY .) Are there any DTCs displayed?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [L5] .) (See DTC TABLE [BCM] .) (See DTC TABLE [INSTRUMENT CLUSTER] .) (See DTC TABLE .)
1		No	Go to the next step.
2	Access the PCM PID ACCS using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Start the engine and idle it. Turn the ACCS PID to ON from OFF using the M-MDS simulation function. Is the A/C magnetic clutch engaged?	Yes	Full-auto air conditioner: Go to Step 6. Manual air conditioner: Go to the next step.
2		No	Go to Step 15.
3	Access the BCM PID ACSW using the M-MDS. (See PID/DATA MONITOR INSPECTION [BCM] .) Monitor the ACSW PID while turning on and off the air conditioner by switching the control panel. Is the PID normal? (See PID/DATA MONITOR TABLE [BCM] .)	Yes	Go to Step 6.
3		No	Go to the next step.
4	Remove the climate control unit. (See CLIMATE CONTROL UNIT REMOVAL [MANUAL AIR CONDITIONER] .) Reconnect the climate control unit connector. Start the engine and idle it. Measure the climate control unit terminal J (24-pin) voltage while turning on and off the air conditioner by control panel. Is the voltage change in specified according to control panel switching? (See CLIMATE CONTROL UNIT INSPECTION [MANUAL AIR CONDITIONER] .)	Yes	Go to the next step.
4		No	Go to Step 6.
5	Inspect for open or short circuit between climate control unit terminal J (24-pin) and BCM terminal 3L. Is there any open or short circuit detected?	Yes	Repair or replace the suspected wiring harness.
5		No	Replace the BCM (BCM can not receive the A/C request signal from climate control unit or transmit it to PCM). (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION .)
6	Start the engine and idle it. Measure the voltage between the following terminals: Full-auto air conditioner: Climate control unit terminal 1F Manual air conditioner: Climate control unit terminal I Is the voltage normal? (See CLIMATE CONTROL UNIT INSPECTION [FULL-AUTO AIR CONDITIONER] .) (See CLIMATE CONTROL UNIT INSPECTION [MANUAL AIR CONDITIONER] .)	Yes	Go to Step 9.
6		No	Go to the next step.
7	Turn the ignition switch to the ON position (engine off). Measure the voltage between the following terminals: Full-auto air conditioner: Climate control unit terminal 1C Manual air conditioner: Climate control unit terminal K Is the voltage normal? (See CLIMATE CONTROL UNIT INSPECTION [FULL-AUTO AIR CONDITIONER] .) (See CLIMATE CONTROL UNIT INSPECTION [MANUAL AIR CONDITIONER] .)	Yes	Go to the next step.
7		No	Replace the climate control unit. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER] .) (See CLIMATE CONTROL UNIT REMOVAL [MANUAL AIR CONDITIONER] .) (See CLIMATE CONTROL UNIT INSTALLATION [MANUAL AIR CONDITIONER] .)
8	Inspect for open or short circuit between following climate control unit terminal (24-pin) and evaporator temperature sensor terminal: Full-auto air conditioner: Between climate control unit terminal 1C and evaporator temperature sensor terminal A Between climate control unit terminal 1F and evaporator temperature sensor terminal B Manual air conditioner: Between climate control unit terminal K and evaporator temperature sensor terminal A Between climate control unit terminal I and evaporator temperature sensor terminal B Is there any open or short circuit detected?	Yes	Repair or replace the suspected wiring harness.
8		No	Replace the evaporator temperature sensor. (See EVAPORATOR TEMPERATURE SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER] .) (See EVAPORATOR TEMPERATURE SENSOR REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER] .)
9	Inspect the refrigerant pressure sensor. (See REFRIGERANT PRESSURE SENSOR INSPECTION [FULL-AUTO AIR CONDITIONER] .) (See REFRIGERANT PRESSURE SENSOR INSPECTION [MANUAL AIR CONDITIONER] .) Is the refrigerant pressure sensor normal?	Yes	Full-auto air conditioner: Go to Step 13. Manual air conditioner: Replace the climate control unit (A/C switch malfunction or climate control unit can not determine A/C request or transmit it to BCM). (See CLIMATE CONTROL UNIT REMOVAL [MANUAL AIR CONDITIONER] .) (See CLIMATE CONTROL UNIT INSTALLATION [MANUAL AIR CONDITIONER] .)
9		No	Go to the next step.
10	Inspect the refrigerant pressure. (See REFRIGERANT PRESSURE CHECK .) Is the refrigerant pressure normal?	Yes	Go to the next step.
10		No	Repair or replace the malfunctioning part according to the inspection results.
11	Turn the ignition switch to the ON position (engine off). Measure the voltage between the following terminals: Full-auto air conditioner: Climate control unit terminal 1N Manual air conditioner: Climate control unit terminal N Is the voltage normal? (See CLIMATE CONTROL UNIT INSPECTION [FULL-AUTO AIR CONDITIONER] .) (See CLIMATE CONTROL UNIT INSPECTION [MANUAL AIR CONDITIONER] .)	Yes	Go to the next step.
11		No	Replace the climate control unit. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER] .) (See CLIMATE CONTROL UNIT REMOVAL [MANUAL AIR CONDITIONER] .) (See CLIMATE CONTROL UNIT INSTALLATION [MANUAL AIR CONDITIONER] .)
12	Inspect for open or short circuit between following climate control unit terminal (24-pin). and refrigerant pressure sensor terminal: Full-auto air conditioner: Between climate control unit terminal 1J and refrigerant pressure sensor terminal A Between climate control unit terminal 1N and refrigerant pressure sensor terminal B Between climate control unit terminal 1C and refrigerant pressure sensor terminal C Manual air conditioner: Between climate control unit terminal E and refrigerant pressure sensor terminal A Between climate control unit terminal N and refrigerant pressure sensor terminal B Between climate control unit terminal K and refrigerant pressure sensor terminal C Is there any open or short circuit detected?	Yes	Repair or replace the suspected wiring harness.
12		No	Replace the refrigerant pressure sensor. (See REFRIGERANT PRESSURE SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER] .) (See REFRIGERANT PRESSURE SENSOR REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER] .)
13	Verify the multi information display indication of A/C system while turning on and off the air conditioner by switching the control penal. Does the multi information display indicate properly?	Yes	Replace the BCM (BCM can not receive the A/C request signal from climate control unit or transmit it to PCM). (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION .)
13		No	Go to the next step.
14	Inspect the multi information display. (See MULTI INFORMATION DISPLAY INPUT/OUTPUT CHECK MODE .) Is the multi information display normal?	Yes	Replace the climate control unit (A/C switch malfunction or climate control unit can not determine A/C request or transmit it to BCM). (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER] .)
14		No	Repair or replace the malfunctioning part according to the inspection results.
15	Start the engine and idle it. Verify that the A/C relay operation sound is heard while PCM PID ACCS to ON from OFF using the M-MDS simulation function. Is the A/C operation sound heard?	Yes	Go to the next step.
15		No	Go to Step 17.
16	Inspect the A/C compressor magnetic clutch. (See MAGNETIC CLUTCH INSPECTION [FULL-AUTO AIR CONDITIONER] .) (See MAGNETIC CLUTCH INSPECTION [MANUAL AIR CONDITIONER] .) Is the magnetic clutch normal?	Yes	Inspect and repair for open or short circuit between battery positive terminal and A/C compressor terminal A.
16		No	Replace the magnetic clutch. (See MAGNETIC CLUTCH DISASSEMBLY/ASSEMBLY [FULL-AUTO AIR CONDITIONER] .) (See MAGNETIC CLUTCH DISASSEMBLY/ASSEMBLY [MANUAL AIR CONDITIONER] .)
17	Inspect the A/C relay. (See RELAY INSPECTION [L5] .) Is the A/C relay normal?	Yes	Go to the next step.
17		No	Replace the A/C relay.
18	Remove the A/C relay. Start the engine and idle it. Measure the A/C relay terminal 2 (fuse box side connector) while PCM PID ACCS to ON from OFF using the M-MDS simulation function. Is the voltage below 1.0 V?	Yes	Inspect and repair for open circuit between ignition switch terminal B and A/C relay terminal 1.
18		No	Inspect and repair for open or short to power supply circuit between PCM terminal 11 and A/C relay terminal 2.
19	Verify test results. If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [L5] .) If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform 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	Retrieve the PCM, BCM, instrument cluster and climate control unit DTCs. (See ON-BOARD DIAGNOSTIC TEST [L5] .) (See DTC INSPECTION [BCM] .) (See DTC INSPECTION [INSTRUMENT CLUSTER] .) (See DTC DISPLAY .) Are there any DTCs displayed?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [L5] .) (See DTC TABLE [BCM] .) (See DTC TABLE [INSTRUMENT CLUSTER] .) (See DTC TABLE .)
1		No	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	Go to Step 5.
2		No	Go to the next step.
3	Turn the ignition switch off. Disconnect the A/C compressor connector. Start the engine and idle it. Does the A/C magnetic clutch disengage?	Yes	Inspect and repair for short to power supply between A/C relay terminal 5 and A/C compressor connector.
3		No	Go to the next step.
4	Verify that the A/C magnetic clutch clearance. (See MAGNETIC CLUTCH ADJUSTMENT [FULL-AUTO AIR CONDITIONER] .) (See MAGNETIC CLUTCH ADJUSTMENT [MANUAL AIR CONDITIONER] .) Is the magnetic clutch clearance normal?	Yes	Inspect and repair A/C magnetic clutch for stuck. (See MAGNETIC CLUTCH INSPECTION [FULL-AUTO AIR CONDITIONER] .) (See MAGNETIC CLUTCH INSPECTION [MANUAL AIR CONDITIONER] .) (See MAGNETIC CLUTCH DISASSEMBLY/ASSEMBLY [FULL-AUTO AIR CONDITIONER] .) (See MAGNETIC CLUTCH DISASSEMBLY/ASSEMBLY [MANUAL AIR CONDITIONER] .)
4		No	Adjust the magnetic clutch clearance.
5	Access the PCM PID AC REQ using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Monitor the AC_REQ PID while turning on and off the air conditioner by switching the control penal. Is the AC_REQ PID always ON?	Yes	Full-auto air conditioner: Replace the climate control unit (A/C request signal always ON). (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER] .) Manual air conditioner: Go to the next step.
5		No	Go to Step 7.
6	Turn the ignition switch off. Disconnect the climate control unit connector. Verify continuity between climate control unit connector terminal J (24-pin) and body ground. Is there continuity?	Yes	Repair for short to ground circuit. If the short to ground could not be detected: Replace the BCM. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION .)
6		No	Replace the climate control unit (A/C request signal always ON). (See CLIMATE CONTROL UNIT REMOVAL [MANUAL AIR CONDITIONER] .) (See CLIMATE CONTROL UNIT INSTALLATION [MANUAL AIR CONDITIONER] .)
7	Inspect the A/C relay. (See RELAY INSPECTION [L5] .) Is the A/C relay normal?	Yes	Inspect and repair for short to ground circuit between A/C relay terminal 2 and PCM terminal 1I.
7		No	Replace the A/C relay.
8	Verify test results. If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [L5] .) If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform 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 A/C compressor disengage when the A/C switch is turned off?	Yes	Go to the next step.
1		No	Go to the symptom troubleshooting "NO.24 A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY". (See NO.24 A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY [L5] .)
2	Perform the PCM DTC inspection using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [L5] .)
2		No	Inspect the APP sensor. (See ACCELERATOR PEDAL POSITION (APP) SENSOR INSPECTION [L5] .) Repair or replace the malfunctioning part according to the inspection results
3	Verify test results. If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [L5] .) If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform 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	Are any drivability or exhaust smoke concerns present?	Yes	Go to the appropriate flow chart.
1	Are any drivability or exhaust smoke concerns present?	No	Go to the next step.
2	Inspect the following: Electrical connections Fuel quality Vacuum lines Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results. Repeat Step 2.
2		No	Go to the next step.
3	Perform the PCM DTC inspection using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [L5] .)
3		No	Go to the next step.
4	Inspect the fuel line pressure. (See FUEL LINE PRESSURE INSPECTION [L5] .) Is there any malfunction?	Yes	Zero or low: Inspect the fuel pump relay and the fuel pump circuit. (See RELAY INSPECTION [L5] .) Inspect the fuel line for clogging. If there is a malfunction: Repair or replace the malfunctioning part according to the inspection results. If there is no malfunction: Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [L5] .) High: Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [L5] .)
4		No	Go to the next step.
5	Inspect the charcoal canister for fuel saturation. Is an excess amount of liquid fuel present in the canister?	Yes	Replace the charcoal canister. (See CHARCOAL CANISTER REMOVAL/INSTALLATION [L5] .)
5		No	Inspect the fuel tank vent system. If the fuel tank vent system is normal: Suggest trying a different brand since the sulfur content can vary in different fuels. If the fuel tank vent system is not normal: Repair or replace the malfunctioning part according to the inspection results.
6	Verify test results. If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [L5] .) If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform 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		ACTION
1	Perform the PCM DTC inspection using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [L5] .)
1		No	Go to the next step.
2	Remove the fuel-filler pipe. Make sure nonreturn valve is installed properly. Inspect the nonreturn valve operation. Is there any malfunction?	Yes	Nonreturn valve is installed improperly: Reinstall the nonreturn valve to proper position. Nonreturn valve does not operate properly: Replace the nonreturn valve.
2		No	Inspect the following: Improper use of fuel nozzle Inadequate fuel filling speed Repair or replace the malfunctioning part according to the inspection results.
3	Verify test results. If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [L5] .) If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform 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		ACTION
1	Perform the PCM DTC inspection using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [L5] .)
1		No	Go to the next step.
2	Remove the fuel-filler pipe. Make sure nonreturn valve is installed properly. Inspect the nonreturn valve operation. Is there any malfunction?	Yes	Nonreturn valve is installed improperly: Reinstall the nonreturn valve to proper position. Nonreturn valve does not operate properly: Replace the nonreturn valve.
2		No	Inspect for the following: Fuel is not inserted correctly Improper use of fuel nozzle Inspect fuel shut-off valve. Repair or replace the malfunctioning part according to the inspection results.
3	Verify test results. If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [L5] .) If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform 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 spark plugs. (See SPARK PLUG INSPECTION [L5] .) Inspect the spark plug. (See SPARK PLUG REMOVAL/INSTALLATION [L5] .) Is there any malfunction?	Yes	Symptom 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 7. All plugs are wet or covered with carbon: Go to Step 9. All plugs look grayish white: Go to Step 15.
2	Are the spark plugs wet/covered with carbon from the engine oil?	Yes	Inspect all areas related to oil, working up and down.
2		No	Go to the next step.
3	Inspect the spark plugs for the following: Air gap Cracked insulator Heat range Worn electrode Is there any malfunction?	Yes	Replace the spark plug. (See SPARK PLUG REMOVAL/INSTALLATION [L5] .)
3		No	Go to the next step.
4	Inspect the compression pressure at the suspected malfunctioning cylinder. (See COMPRESSION INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
4		No	Go to the next step.
5	Install all spark plugs. Perform the Spark Test at the suspected malfunctioning cylinder. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Is a strong blue spark visible (compare with normal cylinder)?	Yes	Go to the next step.
5		No	Repair or replace the malfunctioning part according to the inspection results.
6	Inspect the fuel line pressure. (See FUEL LINE PRESSURE INSPECTION [L5] .) Is there any malfunction?	Yes	Zero or low: Inspect the fuel pump relay and the fuel pump circuit. (See RELAY INSPECTION [L5] .) Inspect the fuel line for clogging. If there is a malfunction: Repair or replace the malfunctioning part according to the inspection results. If there is no malfunction: Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [L5] .) High: Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [L5] .)
6		No	Inspect fuel injector for the following: Injection volume Leakage Open or short circuit in injector Repair or replace the malfunctioning part according to the inspection results.
7	Inspect the spark plug for the following: Air gap Heat range Is there any malfunction?	Yes	Replace the spark plug. (See SPARK PLUG REMOVAL/INSTALLATION [L5] .)
7		No	Go to the next step.
8	Perform the Fuel Injector Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
8		No	Go to the next step.
9	Is the air cleaner element free of clogging?	Yes	Go to the next step.
9	Is the air cleaner element free of clogging?	No	Replace the air cleaner element.
10	Perform the Spark Test. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Is a strong blue spark visible at each cylinder?	Yes	Go to the next step.
10		No	Repair or replace the malfunctioning part according to the inspection results.
11	Inspect the fuel line pressure. (See FUEL LINE PRESSURE INSPECTION [L5] .) Is there any malfunction?	Yes	Zero or low: Inspect the fuel pump relay and the fuel pump circuit. (See RELAY INSPECTION [L5] .) Inspect the fuel line for clogging. If there is a malfunction: Repair or replace the malfunctioning part according to the inspection results. If there is no malfunction: Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [L5] .) High: Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [L5] .)
11		No	Go to the next step.
12	Access the following PIDs using the M-MDS: (See ON-BOARD DIAGNOSTIC TEST [L5] .) ECT. 02S11 (When engine can be started) 02S12 (When engine can be started) MAF Are the PIDs normal? (See PCM INSPECTION [L5] .)	Yes	Go to the next step.
12		No	Repair or replace the malfunctioning part according to the inspection results.
13	Perform the Purge Control System Inspection when the engine can be started. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
13		No	Go to the next step.
14	Perform the compression inspection. (See COMPRESSION INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
14		No	Visually inspect for deformed exhaust system parts. Repair or replace the malfunctioning part according to the inspection results.
15	If the engine cannot be started: Inspect the intake air system for air leakage. If the engine can be started: Perform the intake manifold vacuum inspection. Is air sucked in from intake air system?	Yes	Repair or replace the malfunctioning part according to the inspection results.
15		No	Go to the next step.
16	Inspect the fuel line pressure. (See FUEL LINE PRESSURE INSPECTION [L5] .) Is there any malfunction?	Yes	Zero or low: Inspect the fuel pump relay and the fuel pump circuit. (See RELAY INSPECTION [L5] .) Inspect the fuel line for clogging. If there is a malfunction: Repair or replace the malfunctioning part according to the inspection results. If there is no malfunction: Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [L5] .) High: Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [L5] .)
16		No	Go to the next step.
17	Access the following PIDs using the M-MDS: (See ON-BOARD DIAGNOSTIC TEST [L5] .) ECT 02S11 (When engine can be started) 02S12 (When engine can be started) MAF Are the PIDs normal? (See PCM INSPECTION [L5] .)	Yes	Inspect the PCM ground condition. Repair or replace the malfunctioning part according to the inspection results.
17		No	Repair or replace the malfunctioning part according to the inspection results.
18	Verify test results. If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [L5] .) If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform 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 PIDs for the switch you are inspecting.
Vibrate the sensor slightly with your finger. If PID value is unstable or malfunction occurs, check for poor connection or poorly mounted sensor or both.

Scheme 46

Scheme 46: 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 the engine starts and runs, perform the following steps during idle.
Prepare the output state control function for actuators or relays that you are inspecting.
Vibrate the actuator or relay with your finger for 3 s after output state control function is activated. If variable click sound is heard, check for poor connection or poorly mounted actuator or both, or the relay. NOTE: Vibrating relays too strongly may result in open relays.

Input Signal System Inspection Procedure

Find an irregular signal. (See «FINDING IRREGULAR SIGNALS»(ref-375348-S23845415642010102800000) .)
Locate source. (See «LOCATING THE SOURCE OF UNUSUAL SIGNALS»(ref-375348-S27072412662010102800000) .)
Repair or replace the malfunctioning part.
Confirm that the irregular signal is no longer detected.

GND system inspection for thermistor type

Confirm that terminal sensor #3 is at 0 V. If it is at 0 V , inspect the sensor. If necessary, replace the sensor. If not, inspect for the following: Open circuit in wiring harness Female terminal opening is loose Coupler (pin holder) damage Pin discoloration (blackness) Harness/pin crimp is loose or disconnected

Intake Manifold Vacuum Inspection

Verify air intake hoses are installed properly.
Start the engine and run it at idle.
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 70 kPa {525 mmHg, 21 inHg} NOTE: Air suction can be located by engine speed change when lubricant is sprayed on the area where suction is occurring. Air suction at throttle body, intake manifold and PCV valve installation points EGR valve (stuck open) Fuel injector insulator Engine compression (See «COMPRESSION INSPECTION [L5]»(ref-375350-S22657578122010102800000) .)

Engine coolant temperature compensation inspection

Connect the M-MDS to the DLC-2.
Access the following PIDs: (See «ON-BOARD DIAGNOSTIC TEST [L5]»(ref-375346-S33142303032010102800000) .) 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 [L5]»(ref-375347-S21590208092010102800000) .) Electronic throttle body and related wiring harness (See «THROTTLE POSITION (TP) SENSOR INSPECTION [L5]»(ref-375347-S03242475022010102800000) .)

Load compensation inspection

Start the engine and idle it.
Connect the M-MDS to the DLC-2.
Verify that P0506:00 or P0507:00 is not displayed. If P0506:00 or P0507:00 are displayed, perform DTC inspection. (See «DTC P0506:00 [L5]»(ref-375346-S38160617902010102800000) .) (See «DTC P0507:00 [L5]»(ref-375346-S09841084472010102800000) .)
Access the RPM PID. (See «ON-BOARD DIAGNOSTIC TEST [L5]»(ref-375346-S33142303032010102800000) .) 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 load condition is not as specified, inspect the following: A/C system (A/C request signal always on or off See «NO.23 A/C DOES NOT WORK SUFFICIENTLY [L5]»(ref-375348-S15070232742010102800000) .) (See «NO.24 A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY [L5]»(ref-375348-S04137881912010102800000) .) Electrical load Charging system (See «BATTERY INSPECTION [L5]»(ref-375359-S42289997662010102800000) .) (See «GENERATOR INSPECTION [L5]»(ref-375359-S37098196932010102800000) .) PSP switch (See «POWER STEERING PRESSURE (PSP) SWITCH INSPECTION [L5]»(ref-375347-S39782814022010102800000) .) Idle-up speed (P, N position) No load: 600-700 rpm A/C on: 600-800 rpm Electrical loads on: 650-750 rpm Power steering operating: 670-770 rpm

Throttle position (TP) sweep inspection

Connect the M-MDS to the DLC-2.
Turn the ignition switch to the ON position.
Verify that none of the following DTC are displayed: P0122:00, P0123:00, P0222:00, P0223:00, P0638:00, P2100:00, P2101:00, P2107:00, P2108:00, P2119:00, P2122:00, P2123:00, P2127:00, P2128:00, P2135:00, P2138:00 If any one DTC is displayed, perform DTC inspection. (See «DTC TABLE [L5]»(ref-375346-S28771957642010102800000) .)
Access the TP_REL PID.
Verify that the PID reading is within the TP_REL value. (See «PCM INSPECTION [L5]»(ref-375347-S07672034272010102800000) .) If the PID reading is out of range, perform the following: Remove the air duct from the throttle body. Verify that the throttle valve opens when the accelerator pedal is depressed. If the throttle valve opens, inspect the TP sensor and related wiring harness. If the throttle valve does not open, inspect the throttle actuator control motor and related wiring harness.
Gradually depress the throttle pedal and verify that the PID reading increases accordingly. If the PID reading drops momentarily, inspect the following: TP sensor
Fully depress the throttle pedal and verify that the PID reading is within WOT value. (See «PCM INSPECTION [L5]»(ref-375347-S07672034272010102800000) .) If the PID reading is out of range, perform the followings: Remove the air duct from throttle body. Verify that the throttle valve opens when throttle pedal is depressed. If the throttle valve opens, inspect the TP sensor and related wiring harness. If the throttle valve does not open, inspect the throttle actuator control motor and related wiring harness.

Fuel Cut Control System Inspection

Warm up engine and idle it.
Turn off the electrical loads and A/C switch.
Connect the M-MDS to the DLC-2.
Access RPM PID.
Listen for the fuel injector operation sound at all cylinders using the soundscope and monitor both PIDs while performing the following steps: Depress the accelerator pedal and increase the engine speed to 4,000 rpm. Quickly release the accelerator pedal (brake pedal is not depressed) and verify that the fuel injector operation sound stops, and starts again when the engine speed drops below 1,200 rpm. If not as specified, inspect the following: ECT sensor and related wiring harness (See «ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [L5]»(ref-375347-S21590208092010102800000) .) TR switch and related wiring harness (See «TRANSAXLE RANGE (TR) SWITCH INSPECTION [FS5A-EL]»(ref-375372-S32402115102010102800000) .)

Fuel Pump Control System Inspection

Crank the engine and verify that fuel pump relay operation sound is heard.
If operation sound is not heard, inspect the following: Fuel pump relay (See «RELAY INSPECTION [L5]»(ref-375343-S34496125032010102800000) .) Wiring harness and connectors (Main relay-Fuel pump relay terminal 2-PCM terminal 1BG

Spark Test

Disconnect the fuel pump relay.
Verify that each ignition coil and connector is connected properly.
Inspect the ignition system in the following procedure. 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.

STEP	INSPECTION		ACTION
1	Disconnect the ignition coil from the spark plugs. Remove the spark plugs. (See SPARK PLUG REMOVAL/INSTALLATION [L5] .) Verify that the spark plugs do not have carbon deposits. Is there any malfunction?	Yes	Perform no-load racing at 4,000 rpm for 2 min , 2 times to burn off the carbon deposits. Repeat Step 1.
1		No	Go to the next step.
2	Inspect the spark plugs for damage, wear, and proper plug gap. Is there any malfunction?	Yes	Replace spark plugs, then go to Step 1. (See SPARK PLUG REMOVAL/INSTALLATION [L5] .)
2		No	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.
3		No	Some cylinders do not spark: Go to the next step. All cylinders do not spark: Go to Step 5.
4	Inspect for open or short circuit between the following terminals (wiring harness-side): Ignition coil NO.1 terminal C-PCM terminal 2G Ignition coil NO.2 terminal C-PCM terminal 2K Ignition coil NO.3 terminal C-PCM terminal 2L Ignition coil NO.4 terminal C-PCM terminal 2H Is there any malfunction?	Yes	Repair or replace the suspected wiring harness, then go to Step 1.
4		No	Inspect and replace the ignition coil, then go to Step 1. (See IGNITION COIL INSPECTION [L5] .) (See IGNITION COIL REMOVAL/INSTALLATION [L5] .)
5	Turn the ignition switch to the ON position (engine off). Measure the voltage at the terminal A (wiring harness-side) in each ignition coils. Is the voltage B+ ?	Yes	Go to the next step.
5		No	Inspect the power supply circuit of ignition coils. Repair or replace the suspected wiring harness, then go to Step 1.
6	Inspect the PCM and ignition coil connector or terminals for poor connection. Is there any malfunction?	Yes	Repair or replace the malfunctioning connector or terminals, then go to Step 1.
6		No	Go to the next step.
7	Inspect the CKP sensor and crankshaft pulley. (See CRANKSHAFT POSITION (CKP) SENSOR INSPECTION [L5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to Step 1.
7		No	Inspect for open or short circuit in wiring harness and connector of CKP sensor. Repair or replace the malfunctioning part according to the inspection results, then go to Step 1.

DIAGNOSTIC PROCEDURE

EGR Control System Inspection

Crank the engine and verify that EGR valve operation (initial operation) sound is heard. If the operation sound is not heard, connect the M-MDS to the DLC-2 and verify that the DTC P0403:00 is shown. Perform DTC inspection. (See «DTC P0403:00 [L5]»(ref-375346-S40412561592010102800000) .)
Start the engine and idle it.
Warm up the engine to normal operating temperature.
Access the following PIDs: (See «ON-BOARD DIAGNOSTIC TEST [L5]»(ref-375346-S33142303032010102800000) .) APP1 APP2 ECT RPM SEGRP_DSD VSS
Idle the vehicle and verify that the SEGRP value is 0.
Put the vehicle in drive.
Depress the accelerator pedal and verify that the SEGRP_DSD value is increased. If the EGR valve increases, inspect the following: EGR valve (stuck open or close) (See «EGR VALVE INSPECTION [L5]»(ref-375355-S05507616232010102800000) .) Wiring harness and connectors (Main relay-EGR valve-PCM) If the SEGRP_DSD value does not increase, inspect the VSS, APP1, APP2, TP_REL and ECT PIDs. (See «PCM INSPECTION [L5]»(ref-375347-S07672034272010102800000) .)
Stop the vehicle and verify that the SEGRP value returns to 0.

Purge Control System inspection

Start the engine.
Disconnect the vacuum hose between the purge solenoid valve and the charcoal canister.
Put a finger to the purge solenoid valve and verify that there is no vacuum applied when the engine is cold. If there is a vacuum, inspect the following: Wiring harness and connectors (Purge solenoid valve terminal A-PCM terminal 1BA) Purge solenoid valve (See «PURGE SOLENOID VALVE INSPECTION [L5]»(ref-375355-S29441551692010102800000) .)
Warm up the engine to the normal operating temperature.
Stop the engine.
Connect the M-MDS to the DLC-2 and verify that the DTC P0443:00 is shown. Perform DTC inspection. (See «DTC P0443:00 [L5]»(ref-375346-S08316861922010102800000) .)
Turn the ignition switch to the ON position.
Access the ECT PID. (See «ON-BOARD DIAGNOSTIC TEST [L5]»(ref-375346-S33142303032010102800000) .)
Verify that the engine coolant temperature is more than 60°C {140°F} . If the M-MDS indicates less than 60°C {140°F} , perform the ECT sensor inspection. (See «ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [L5]»(ref-375347-S21590208092010102800000) .)
Set the vehicle on the dynamometer or chassis roller. WARNING: When the dynamometer or chassis roller is operating, there is a possibility that the operator may come into contact with or be caught up in the rotating parts, leading to serious injuries or death. When performing work while the dynamometer or chassis roller is operating, be careful not to come into contact with or be caught up in any of the rotating parts.
Drive vehicle at engine speed approx. 2,000 rpm for 30 s or more.
Put a finger to the purge solenoid valve and verify that there is no vacuum applied while step 2. If there is no vacuum, inspect the following: Wiring harness and connector (Main relay-Purge solenoid valve-PCM terminal 1 BA) Purge solenoid valve (See «PURGE SOLENOID VALVE INSPECTION [L5]»(ref-375355-S29441551692010102800000) .) MAF, APP1, APP2, TP_REL and LOAD PIDs (See «PCM INSPECTION [L5]»(ref-375347-S07672034272010102800000) .) If there is vacuum, inspect the following: Vacuum hose (Purge solenoid valve-Charcoal canister)

A/C Cut-off Control System Inspection

Start the engine.
Turn the A/C switch and the 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". (See «NO.23 A/C DOES NOT WORK SUFFICIENTLY [L5]»(ref-375348-S15070232742010102800000) .)
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 (See «RELAY INSPECTION [L5]»(ref-375343-S34496125032010102800000) .) Open or short to ground circuit in wiring harness and connectors (Ignition switch-A/C relay-PCM terminal 11) A/C related parts APP1, APP2 PIDs (See «PCM INSPECTION [L5]»(ref-375347-S07672034272010102800000) .)

Cooling Fan Control System Inspection

Connect the M-MDS to the DLC-2.
Start the engine and warm it up to normal operating temperature.
Perform the KOER self-test. (See «KOEO/KOER SELF TEST [L5]»(ref-375346-S16999365572010102800000) .)
Verify that the DTC P0480:00 is not shown and the cooling fan NO.1 and NO.2 operate during the KOER self-test. If DTC P0480:00 is shown, perform the DTC troubleshooting procedure. (See «DTC P0480:00 [L5]»(ref-375346-S30627597692010102800000) .) If the cooling fans do not operate, indicated order in accordance with fan operation conditions.

Evaporative Emission (EVAP) System Leak Inspection

To verify that the problem has been fixed properly after repairs, the run drive cycle or EVAP system leak inspection must be performed.

EVAP system test out line

The EVAP system test, which can substituted for the run drive cycle as an EVAP control system repair confirmation method, can detect the small/large leak or blockage without run-drive cycle. NOTE: M-MDS can not detect "VERY SMALL LEAK". To identify the leak point, please use the leak tester or ultrasonic leak detector.

Scheme 47

Scheme 47: EVAP system test description

Scheme 48

Scheme 49

The EVAP system test finds gas leaks or blockage of EVAP system using the changes of the fuel tank pressure. This test starts after sending an on-demand test signal from the M-MDS to the PCM. This test consists of three stages, and each stage is performed automatically as follows: Stage 1 test. (Test for large leak or blockage) M-MDS send the stage 1 test start signal to the PCM. PCM controls the CV solenoid valve and purge solenoid valve to control the tank pressure to the targeted value. M-MDS detect the large leak or the purge line blockage if the tank pressure does not arrive at the target vacuum in specified period. Stage 2 test. (Test for small leak) When fuel tank pressure arrived at the targeted pressure at stage 1 test, M-MDS send the stage 2 test signal to the PCM to turn off the purge solenoid to keep the tank pressure. M-MDS detect the small leak if the tank pressure can not keep within the target in specified period. Stage 3 test. (Test for blockage) M-MDS send the stage 3 test signal to the PCM to turn off the CV solenoid for check the blockage of EVAP system. M-MDS detect blockage of the CV solenoid valve or air filter if the tank pressure does not arrive at the target (atmosphere).

Symptom Troubleshooting [L5] - Engine: Diagnosis Mazda CX-7 I рестайлинг

SYMPTOM DIAGNOSTIC INDEX [L5]

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Diagnostic procedure

Inspection Method for Sensors

Scheme 46

Input Signal System Inspection Procedure

GND system inspection for thermistor type

Intake Manifold Vacuum Inspection

Engine coolant temperature compensation inspection

Load compensation inspection

Throttle position (TP) sweep inspection

Fuel Cut Control System Inspection

Fuel Pump Control System Inspection

Spark Test

EGR Control System Inspection

Purge Control System inspection

A/C Cut-off Control System Inspection

Cooling Fan Control System Inspection

Evaporative Emission (EVAP) System Leak Inspection

EVAP system test out line

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More articles — Symptom Troubleshooting [L5] - Engine

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