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HOMESERVICE MANUALSMAZDA20105 SPORT, 2.3 L, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISSYMPTOM TROUBLESHOOTING [L3] - ENGINESYMPTOM DIAGNOSTIC INDEXDIAGNOSTIC INDEX
2010 Mazda 5 Sport, 2.3 L, Standard

Diagnostic Index

2010 Mazda 5 Sport, 2.3 L, StandardSECTION Diagnostic Index
DIAGNOSTIC INDEX

No. TROUBLESHOOTING ITEM DESCRIPTION ACTION
1 Melting of main or other fuses - (See NO. 1 MELTING OF MAIN OR OTHER FUSES .)
2 MIL illuminates The MIL is illuminated incorrectly. (See NO. 2 MIL ILLUMINATES .)
3 Will not crank The starter does not work. (See NO. 3 WILL NOT CRANK .)
4 Hard to start/long crank/erratic start/erratic crank The starter cranks engine at normal speed but the engine requires excessive cranking time before starting.
The battery is in normal condition.		 (See NO. 4 HARD TO START/LONG CRANK/ERRATIC START/ERRATIC CRANK .)
5 Engine stalls After start/at idle Engine stops unexpectedly. (See NO. 5 ENGINE STALLS-AFTER START/AT IDLE .)
6 Cranks normally but will not start The starter cranks engine at normal speed but the engine will not run.
Refer to symptom troubleshooting "NO. 5 ENGINE STALLS-AFTER START/AT IDLE " if this symptom appears after engine stall.
Fuel is in tank.
Battery is in normal condition.		 (See NO. 6 CRANKS NORMALLY BUT WILL NOT START .)
7 Slow return to idle Engine takes more time than normal to return to idle speed. (See NO. 7 SLOW RETURN TO IDLE .)
8 Engine runs rough/rolling idle Engine speed fluctuates between specified idle speed and lower speed and the engine shakes excessively.
Idle speed is too slow and engine shakes excessively.		 (See NO. 8 ENGINE RUNS ROUGH/ROLLING IDLE .)
9 Fast idle/runs on The engine speed continues at fast idle after warm-up.
The engine runs after the ignition switch is turned off.		 (See NO. 9 FAST IDLE/RUNS ON .)
10 Low idle/stalls during deceleration Engine stops unexpectedly at the beginning of deceleration or recovery from deceleration. (See NO. 10 LOW IDLE/STALLS DURING DECELERATION .)
11 Engine stalls/quits Acceleration/cruise Engine stops unexpectedly at the beginning of acceleration or during acceleration. Engine stops unexpectedly while cruising. (See NO. 11 ENGINE STALLS/QUITS, ENGINE RUNS ROUGH, MISSES, BUCK/JERK, HESITATION/STUMBLE, SURGES .)
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 the 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). (See NO. 12 LACK/LOSS OF POWER-ACCELERATION/CRUISE .)
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). (See NO. 13 KNOCKING/PINGING-ACCELERATION/CRUISE .)
14 Poor fuel economy Fuel economy is unsatisfactory. (See NO. 14 POOR FUEL ECONOMY .)
15 Emission compliance Fails emissions test. (See NO. 15 EMISSION COMPLIANCE .)
16 High oil consumption/leakage Oil consumption is excessive. (See NO. 16 HIGH OIL CONSUMPTION/LEAKAGE .)
17 Cooling system concerns Overheating Engine runs at higher than normal temperature/overheats. (See NO. 17 COOLING SYSTEM CONCERNS-OVERHEATING .)
18 Cooling system concerns Runs cold Engine takes excessive time not reach normal operating temperature. (See NO. 18 COOLING SYSTEM CONCERNS-RUNS COLD .)
19 Exhaust smoke Blue, black, or white smoke from exhaust system (See NO. 19 EXHAUST SMOKE .)
20 Fuel odor (in engine compartment) Gasoline fuel smell or visible leakage (See NO. 20 FUEL ODOR (IN ENGINE COMPARTMENT) .)
21 Engine noise Engine noise from under hood (See NO. 21 ENGINE NOISE .)
22 Vibration concerns (engine) Vibration from under hood or driveline (See NO. 22 VIBRATION CONCERNS (ENGINE) .)
23 A/C does not work sufficiently A/C compressor magnetic clutch does not engage when the A/C switch is turned on. (See NO. 23 A/C DOES NOT WORK SUFFICIENTLY .)
24 A/C is always on or A/C compressor runs continuously A/C compressor magnetic clutch does not disengage. (See NO. 24 A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY .)
25 A/C is not cut off under wide open throttle conditions A/C compressor magnetic clutch does not disengage under WOT. (See NO. 25 A/C IS NOT CUT OFF UNDER WIDE OPEN THROTTLE CONDITIONS .)
26 Exhaust sulphur smell Rotten egg smell (sulphur) from exhaust (See NO. 26 EXHAUST SULPHUR SMELL .)
27 Fuel refill concerns Fuel tank is not filled smoothly. (See NO. 27 FUEL REFILL CONCERNS .)
28 Fuel filling shut off concerns Fuel does not shut off properly. (See NO. 28 FUEL FILLING SHUT OFF CONCERNS .)
29 Spark plug condition Incorrect spark plug condition. (See NO. 29 SPARK PLUG CONDITION .)
30 ATX concerns Upshift/downshift engagement ATX concerns not related to engine performance. (See AUTOMATIC TRANSAXLE CONTROL SYSTEM WIRING DIAGRAM .)
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.