Symptom Troubleshooting [Engine Control System [Skyactiv-G 2.0]]: Other Mazda 3 BM

FOREWORD [SKYACTIV-G 2.0]

1. If there is any vehicle malfunction complaint lodged by a customer, perform malfunction diagnosis according to the troubleshooting procedure.

Troubleshooting Procedure Flow Chart. Scheme 281

Scheme 282

Scheme 283

1. If the malfunction does not recur, verify the malfunction cause by performing the following actions: Based on the repair order form, attempt to drive the vehicle or perform tests to replicate the malfunction, record the data (such as PCM circuit voltage) at that time, and detect the malfunction cause. Shake the wiring harness or connector of the electrical component which is suspected to be the cause of the malfunction, and inspect for malfunction or occurrence of any DTCs. (Scheme 282): Shaking Electrical Component Connector Inspect the female terminals on the connector of the electric component which is suspected to be the cause of the malfunction for poor connection. (Scheme 283): Inspecting Female Terminal Of Connector

NO.1 BLOWN FUSES [SKYACTIV-G 2.0]

1 BLOWN FUSES [TROUBLESHOOTING HINTS] Inspect condition of fuse

Scheme 284

NO.2 MIL ILLUMINATES [SKYACTIV-G 2.0]

2 MIL ILLUMINATES DESCRIPTION MIL illuminates incorrectly. POSSIBLE CAUSE MIL illuminates for emission-related concern (DTC is stored in PCM) Short to ground in wiring harness between the following terminals: Instrument cluster terminal 2D-PCM terminal 2AL Instrument cluster terminal 2B-PCM terminal 2AK Open circuit in wiring harness between the following terminals: Instrument cluster terminal 2D-PCM terminal 2AL Instrument cluster terminal 2B-PCM terminal 2AK Instrument cluster malfunction NOTE: If MIL blinks at a steady rate, a misfire condition could possibly exist

NO.3 WILL NOT CRANK [SKYACTIV-G 2.0]

3 WILL NOT CRANK DESCRIPTION Starter does not work. POSSIBLE CAUSE Poor connection of coil antenna connector Instrument cluster or related wiring harness malfunction Immobilizer system malfunction PCM continuous memory DTC is stored Open circuit in wiring harness between the following terminals: Main relay terminal E-PCM terminal 2K Main relay terminal C-PCM terminal 2S, 1CK DLC-2-PCM terminal 2AK, 2AL Main relay malfunction (stuck open) Open or poor ground circuit Poor connection of vehicle body ground Battery malfunction Fuse malfunction Starter relay malfunction Ignition switch or related wiring harness malfunction Starter relay related wiring harness malfunction Between starter relay terminal A and PCM terminal 2AZ Between starter relay terminal E and PCM terminal 2N Between ignition switch terminal B and starter relay terminal E Following circuit malfunction: Between battery positive terminal and starter relay terminal C Between battery positive terminal and starter terminal B Between starter relay terminal D and starter terminal S Starting system malfunction Following circuit and/or connector malfunction: Between coil antenna terminal B and instrument cluster terminal 2M Between coil antenna terminal A and instrument cluster terminal 2Q Between PCM terminal 2AL and instrument cluster terminal 2D Between PCM terminal 2AK and instrument cluster terminal 2B Seized/hydro locked engine, flywheel (MTX) or drive plate (ATX) Start circuit in ignition switch malfunction Open circuit in wiring harness between ignition switch and starter

Scheme 285

Related PIDs

NO.4 HARD TO START/LONG CRANK/ERRATIC START/ERRATIC CRANK [SKYACTIV-G 2.0]

NO.5 ENGINE STALLS-AFTER START/AT IDLE [SKYACTIV-G 2.0]

NO.6 CRANKS NORMALLY BUT WILL NOT START [SKYACTIV-G 2.0]

NO.7 SLOW RETURN TO IDLE [SKYACTIV-G 2.0]

NO.8 ENGINE RUNS ROUGH/ROLLING IDLE [SKYACTIV-G 2.0]

NO.9 FAST IDLE/RUNS ON [SKYACTIV-G 2.0]

NO.10 LOW IDLE/STALLS DURING DECELERATION [SKYACTIV-G 2.0]

NO.11 ENGINE STALLS/QUITS, ENGINE RUNS ROUGH, MISSES, BUCK/JERK, HESITATION/STUMBLE, SURGES [SKYACTIV-G 2.0]

NO.12 LACK/LOSS OF POWER-ACCELERATION/CRUISE [SKYACTIV-G 2.0]

NO.13 KNOCKING/PINGING-ACCELERATION/CRUISE [SKYACTIV-G 2.0]

NO.14 POOR FUEL ECONOMY [SKYACTIV-G 2.0]

14 POOR FUEL ECONOMY DESCRIPTION Fuel economy is unsatisfactory. POSSIBLE CAUSE Engine cooling system malfunction PCM DTC is stored Erratic signal to PCM APP sensor or related circuit malfunction ECT sensor No.1 or related circuit malfunction IAT sensor No.1 (integrated in MAF sensor/IAT sensor No.1) or related circuit malfunction MAF sensor or related circuit malfunction MAP sensor or related circuit malfunction TP sensor or related circuit malfunction Intermittent open or short circuit MAF sensor, APP sensor, TP sensor Improper operation of cooling fan control system Improper operation of A/C system Incorrect fuel injection timing Fuel injector malfunction Short to power supply in wiring harness between ignition switch terminal A and PCM terminal 2H Contaminated air cleaner element Air leakage or restriction in intake-air system Poor fuel quality Improper coolant level Clutch slippage (MTX) Improper ATF level (ATX) Brake dragging Tire air pressure malfunction Vacuum leakage Fuel leakage Contamination in MAF sensor Tires, wheels (large size) Change of intake air system components and exhaust system components Engine operation time is longer than traveled distance Vehicle is driven in congested traffic frequently Left idling for long periods Amount of fuel injection increases Overloaded Frequent acceleration/deceleration Frequently driving on ascending roads Travel distance per one drive is short (amount of time for warm-up is long during engine operation) Improper load signal input Improper A/C request signal Driver forgets to switch electronic device off Electronic device is frequently used with engine stopped (no power generation) Vehicle left undriven for long periods Large amount of parasitic draw (especially after-market electronic devices) Erratic or no signal from CMP sensor Loose installation Damaged trigger wheel (intake camshaft and/or exhaust camshaft) Open or short circuit in related wiring harness Erratic signal from CKP sensor Loose installation Damaged trigger wheel (crankshaft pulley) Open or short circuit in related wiring harness Inadequate fuel pressure (high-pressure side) Fuel pressure sensor malfunction High pressure fuel pump malfunction Spill valve control solenoid valve control circuit malfunction (damage to driver in PCM caused by short circuit to ground system) Spill valve control solenoid valve (built-into high pressure fuel pump) malfunction Relief valve (built-into high pressure fuel pump) malfunction Fuel line restricted or clogged Fuel pump unit malfunction Improper engine compression Improper intake valve timing due to timing chain jumping Improper exhaust valve timing due to timing chain jumping Spark plug malfunction Exhaust system and/or TWC restriction PCV valve malfunction Injector driver (built-into PCM) malfunction WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injury or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual. (See BEFORE SERVICE PRECAUTION [SKYACTIV-G 2.0] .) (See AFTER SERVICE PRECAUTION [SKYACTIV-G 2.0] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to the fuel pipe and quick release connector. Always clean the quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material

Scheme 286

NO.15 EMISSION COMPLIANCE [SKYACTIV-G 2.0]

NO.16 HIGH OIL CONSUMPTION/LEAKAGE [SKYACTIV-G 2.0]

NO.17 COOLING SYSTEM CONCERNS-OVERHEATING [SKYACTIV-G 2.0]

NO.18 COOLING SYSTEM CONCERNS-RUNS COLD [SKYACTIV-G 2.0]

NO.19 EXHAUST SMOKE [SKYACTIV-G 2.0]

NO.20 FUEL ODOR (IN ENGINE COMPARTMENT) [SKYACTIV-G 2.0]

NO.23 A/C DOES NOT WORK SUFFICIENTLY [SKYACTIV-G 2.0]

23 A/C DOES NOT WORK SUFFICIENTLY DESCRIPTION A/C compressor magnetic clutch does not engage when A/C switch is turned on. POSSIBLE CAUSE PCM, instrument cluster or climate control unit DTC is stored Refrigerant pressure sensor malfunction Improper refrigerant charging amount Seized A/C compressor Evaporator temperature sensor malfunction Open or short circuit in wiring harness between the following terminals: Evaporator temperature sensor terminal B-Climate control unit terminal 1C Evaporator temperature sensor terminal A-Climate control unit terminal 1G Instrument cluster malfunction (Does not receive A/C request signal from climate control unit or transmit it to PCM) Climate control unit malfunction (A/C switch malfunction or climate control unit does not determine A/C request or transmit A/C request signal) Open circuit in wiring harness between magnetic clutch and body ground A/C relay stuck open Open circuit in wiring harness between the following terminals: Ignition switch (IG2)-A/C relay terminal A Battery positive terminal-A/C relay terminal C A/C relay terminal D-Magnetic clutch terminal A Open circuit in wiring harness between A/C relay terminal E and PCM terminal 2AF

Scheme 287

NO.24 A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY [SKYACTIV-G 2.0]

24 A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY DESCRIPTION A/C compressor magnetic clutch does not disengage. POSSIBLE CAUSE PCM, instrument cluster or climate control unit DTC is stored Short to power supply in wiring harness between A/C relay terminal D and magnetic clutch terminal A Magnetic clutch engagement is stuck Climate control unit malfunction (Climate control unit always transmits A/C request signal) A/C relay is stuck closed Short to ground in wiring harness between A/C relay terminal E and PCM terminal 2AF

Scheme 288

NO.25 A/C IS NOT CUT OFF UNDER WIDE OPEN THROTTLE CONDITIONS [SKYACTIV-G 2.0]

NO.26 EXHAUST SULPHUR SMELL [SKYACTIV-G 2.0]

NO.28 FUEL FILLING SHUT OFF CONCERNS [SKYACTIV-G 2.0]

NO.29 SPARK PLUG CONDITION [SKYACTIV-G 2.0]

NO.30 OIL PRESSURE WARNING LIGHT ILLUMINATES [SKYACTIV-G 2.0]

30 OIL PRESSURE WARNING LIGHT ILLUMINATES DESCRIPTION Oil pressure warning light illuminates incorrectly. POSSIBLE CAUSE Engine oil malfunction Engine oil deterioration Fuel penetration into engine oil Oil pressure switch malfunction Engine oil solenoid valve malfunction Oil strainer malfunction Oil pump malfunction Short to ground in wiring harness between the following terminals: Instrument cluster terminal 2D-PCM terminal 2AL Instrument cluster terminal 2B-PCM terminal 2AK Open circuit in wiring harness between the following terminals: Instrument cluster terminal 2D-PCM terminal 2AL Instrument cluster terminal 2B-PCM terminal 2AK Instrument cluster malfunction

Scheme 289

Water Sprinkling Method

If a malfunction occurs only during high humidity or rainy/snowy weather, perform the following steps

Scheme 290

1. Connect the M-MDS to the DLC-2 if you are inspecting sensors or switches.
2. Switch the ignition to ON (engine off). NOTE: If the engine starts and runs, perform the following steps at idle.
3. Access the PIDs for the sensor or the switch if you are inspecting sensors or switches.
4. If you are inspecting the switch, turn it on manually.
5. Spray water onto the vehicle or run it through a car wash. If the PID value is unstable or a malfunction occurs, repair or replace parts if necessary. (Scheme 287): Spraying Water Onto Vehicle

If data monitor function of M-MDS is used

1. Warm up the engine and idle it.
2. Connect the M-MDS to the DLC-2.
3. Select the RPM and the FUELPW PIDs. (See «ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.0]»(ref-579395-S07770122602013100700000) .)
4. Monitor both PIDs while performing the following steps: Depress the accelerator pedal and increase the RPM PID to 4,000 rpm . Quickly release the accelerator pedal (brake pedal is not depressed) and verify that the FUELPW PID is 0 msec , and 2-5 msec when the RPM PID drops below 1,200 rpm . If not as specified, inspect the following: ECT sensor No.1 and related wiring harness (See «ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [SKYACTIV-G 2.0]»(ref-579396-S25439123242013100700000) .)

If data monitor function of M-MDS is not used

1. Warm up the engine and idle it.
2. Measure the fuel injector control signal wave profile using the oscilloscope 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 wave profile constant B+ , and the wave appears when the engine speed drops below 1,200 rpm . (See «PCM INSPECTION [SKYACTIV-G 2.0]»(ref-579396-S14636467412013100700000) .) If not as specified, inspect the following: ECT sensor No.1 and related wiring harness (See «ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [SKYACTIV-G 2.0]»(ref-579396-S25439123242013100700000) .)

If simulation function of M-MDS is not used

1. Start the engine.
2. Disconnect the vacuum hose between the purge solenoid valve and the charcoal canister.
3. 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-PCM terminal 1AI) Purge solenoid valve (See «PURGE SOLENOID VALVE INSPECTION [SKYACTIV-G 2.0]»(ref-579420-S15551593862013100700000) .)
4. Warm up the engine to the normal operating temperature.
5. Stop the engine.
6. Connect the M-MDS to the DLC-2 and verify that DTC P0443:00 is displayed. Perform the DTC inspection. (See «DTC P0443:00 [SKYACTIV-G 2.0]»(ref-579395-S31900149262013100700000) .)
7. Switch the ignition to ON.
8. Select the ECT PID. (See «ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.0]»(ref-579395-S07770122602013100700000) .)
9. Verify that the engine coolant temperature is above 60 °C {140 °F} . If the M-MDS indicates that the temperature is below 60 °C {140 °F} , perform the ECT sensor No.1 inspection. (See «ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [SKYACTIV-G 2.0]»(ref-579396-S25439123242013100700000) .)
10. Set the vehicle on a 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 contact or be caught up in any of the rotating parts.
11. Drive the vehicle at an engine speed to approx. 2000 rpm for 30 s or more .
12. Put a finger to the purge solenoid valve and verify that there is no vacuum applied during Step 2. If there is no vacuum, inspect the following: Wiring harness and connector (Main relay-Purge solenoid valve-PCM terminal 1AI) Purge solenoid valve (See «PURGE SOLENOID VALVE INSPECTION [SKYACTIV-G 2.0]»(ref-579420-S15551593862013100700000) .) MAF, APP1, APP2, TP REL and LOAD PIDs If there is vacuum, inspect the following: Vacuum hose (Purge solenoid valve-Charcoal canister)

When idling cannot be continued

1. Connect the M-MDS to the DLC-2 and verify that DTC P2090:00 or P2091:00 is displayed. (See «ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.0]»(ref-579395-S07770122602013100700000) .) Perform the DTC inspection. (See «DTC P2090:00 [SKYACTIV-G 2.0]»(ref-579395-S09802887712013100700000) .) (See «DTC P2091:00 [SKYACTIV-G 2.0]»(ref-579395-S25717487842013100700000) .)
2. Remove the OCV and verify that the spool valve is at maximum advanced position. (See «OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [SKYACTIV-G 2.0]»(ref-579373-S24188399892013100700000) .)
3. Connect the OCV.
4. Switch the ignition to ON.
5. Verify that the spool valve is at the maximum advanced position. If the spool valve is stuck in the retard direction, inspect for the following: Short circuit in wiring harnesses or connectors between OCV and PCM
6. Inspect the hydraulic variable valve timing actuator. (See «HYDRAULIC VARIABLE VALVE TIMING ACTUATOR INSPECTION [SKYACTIV-G 2.0]»(ref-579373-S31770090002013100700000) .)

When idling can be continued

If simulation function of M-MDS is used

1. Warm up the engine to normal operating temperature.
2. Connect the M-MDS to the DLC-2.
3. Verify that DTC P2090:00 or P2091:00 is displayed. (See «ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.0]»(ref-579395-S07770122602013100700000) .) Perform the DTC inspection. (See «DTC P2090:00 [SKYACTIV-G 2.0]»(ref-579395-S09802887712013100700000) .) (See «DTC P2091:00 [SKYACTIV-G 2.0]»(ref-579395-S25717487842013100700000) .)
4. Start the engine and let it idle.
5. Select the VT EX_DES PID. (See «ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.0]»(ref-579395-S07770122602013100700000) .)
6. Increase the OCV duty value and verify that the engine idles rough or stalls. If as specified, inspect the timing belt component (valve timing deviation). (See «HYDRAULIC VARIABLE VALVE TIMING ACTUATOR INSPECTION [SKYACTIV-G 2.0]»(ref-579373-S31770090002013100700000) .) If not as specified, go to the next step.
7. Remove the OCV while the connector is connected. (See «OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [SKYACTIV-G 2.0]»(ref-579373-S24188399892013100700000) .)
8. Switch the ignition to ON.
9. Select the VT EX_DES PID. (See «ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.0]»(ref-579395-S07770122602013100700000) .)
10. Increase the OCV duty value and verify that the spool valve operates in the retard direction. If as specified, inspect the following hydraulic passage for restriction and/or leakage: Oil pressure switch-OCV OCV-Exhaust camshaft Exhaust camshaft internal passage If not as specified, inspect the following: OCV operation (See «OIL CONTROL VALVE (OCV) INSPECTION [SKYACTIV-G 2.0]»(ref-579373-S05518927242013100700000) .)
11. If they are normal, replace the exhaust camshaft pulley. (See «ELECTRIC VARIABLE VALVE TIMING ACTUATOR, HYDRAULIC VARIABLE VALVE TIMING ACTUATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0]»(ref-579373-S35314981532013100700000) .) If simulation function of M-MDS is not used
12. Connect the M-MDS to the DLC-2 and verify that DTC P2090:00 or P2091:00 is displayed. Perform the DTC inspection. (See «DTC P2090:00 [SKYACTIV-G 2.0]»(ref-579395-S09802887712013100700000) .) (See «DTC P2091:00 [SKYACTIV-G 2.0]»(ref-579395-S25717487842013100700000) .)
13. Disconnect the OCV connector.
14. Warm up the engine and idle it.
15. Apply the battery voltage to the OCV and verify that the engine idles rough or stalls. If the engine idles rough or stalls, inspect the timing belt component (valve timing deviation). If the engine does not idle rough or stalls, go to the next step.
16. Remove the OCV and perform the spool valve operation inspection. (See «OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [SKYACTIV-G 2.0]»(ref-579373-S24188399892013100700000) .) If not as specified, inspect the following: OCV (See «OIL CONTROL VALVE (OCV) INSPECTION [SKYACTIV-G 2.0]»(ref-579373-S05518927242013100700000) .) Harnesses and connectors between OCV and PCM have an open or short circuit If as specified, inspect the following hydraulic passages for restriction or leakage or both: Oil pressure switch-OCV OCV-Exhaust camshaft Exhaust camshaft internal passage
17. If they are normal, replace the exhaust camshaft pulley. (See «ELECTRIC VARIABLE VALVE TIMING ACTUATOR, HYDRAULIC VARIABLE VALVE TIMING ACTUATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0]»(ref-579373-S35314981532013100700000) .)