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Section: Testing & Diagnostics

On-Board Diagnostic - Engine Control System (Lf, L3)

On-Board Diagnostic - Engine Control System (L3 with TC)

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Symptom Troubleshooting (L3 with TC): Overview Mazda 3 BK рестайлинг

Testing & Diagnostics 13 illustrations ~282 words

Scheme 180

Scheme 180: SYMPTOM TROUBLESHOOTING WIRING DIAGRAM [L3 WITH TC]

Scheme 181

Scheme 182

Scheme 182: FOREWORD [L3 WITH TC]

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 [L3 WITH TC]»(/mazda/3/bk-2006-2009/remont/testing-diagnostics/#on-board-diagnostic-engine-control-system-l3-with-tc).) If no DTC exists and the MIL does not illuminate or flash, diagnose the applicable symptom troubleshooting. (See «QUICK DIAGNOSTIC CHART [L3 WITH TC]» ).

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

Diagnostic Index

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

DIAGNOSTIC INDEX DESCRIPTION

Scheme 183

Scheme 183: CONTROL SYSTEM DEVICE AND CONTROL RELATIONSHIP CHART [L3 WITH TC]

Scheme 184

Scheme 185

Scheme 185: QUICK DIAGNOSTIC CHART [L3 WITH TC]

Scheme 186

Scheme 187

Scheme 188

Scheme 189

Scheme 190

Scheme 191

Scheme 192

Scheme 192: NO.1 MELTING OF MAIN OR OTHER FUSES [L3 WITH TC]

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

FUSES DESCRIPTION

Main Relay Operation Inspection

Verify that the main relay clicks when the ignition switch is turned to ON position and then off. If there is no operation sound, inspect the following: Main relay (See «RELAY INSPECTION».) Wiring harness and connector between ignition switch and main relay terminal A. Wiring harness and connector between PCM terminal 1 AT and main relay terminal B.

Variable Swirl System Operation Inspection

Connect the M-MDS to the DLC-2.
Access the ECT PID.
Verify that the ECT PID is below 60°C {140°F}.
Start the engine.
Inspect the rod operation under the following conditions

Rod operation

Engine speed	3,750 rpm
Engine speed	Below	Above
Shutter valve actuator	Operate	Not operate

ROD OPERATION SPECIFICATIONS

If the rod operation is not specified, inspect as follows

Perform the KOER self-test using the M-MDS and verify that DTCs No. P2004, P2006, P2009 or P2010 are not displayed. If DTC No. P2004, P2006, P2009 or P2010 are displayed, perform DTC inspection. (See «DTC TABLE [L3 WITH TC]»(/mazda/3/bk-2006-2009/remont/testing-diagnostics/#on-board-diagnostic-engine-control-system-l3-with-tc) .)