Troubleshooting; Engine Symptom Troubleshooting - Mazda 6 2002 Workshop Manual

ENGINE SYMPTOM TROUBLESHOOTING

• Confirm trouble symptom using the following diagnostic inde, then go to appropriate troubleshooting chart.
Diagnostic Inde
No. TROUBLESHOOTING ITEM
1 Melting of main or other fuses
2 MIL illuminates
3 Will not crank
Hard to start/long crank/erratic start/erratic
4
crank
5 Engine stalls.
6 Cranks normally but will not start
7 Slow return to idle
8 Engine runs rough/rolling idle
9 Fast idle/runs on
10 Low idle/stalls during deceleration
Engine stalls/quits.
Engine runs rough.
Misses
11
Buck/jerk
Hesitation/stumble
Surges
12 Lack/loss of power
13 Knocking/pinging
14 Poor fuel economy
15 Emission compliance
16 High oil consumption/leakage
Cooling system
17
concerns
Cooling system
18
concerns
19 Ehaust smoke
20 Fuel odor (in engine compartment)
21 Engine noise
22 Vibration concerns (engine)
23 A/C does not work sufficiently.
A/C is always on or A/C compressor runs
24
continuously.
25 A/C is not cut off under WOT conditions.
26 Ehaust sulphur smell
27 Constant voltage
28 Spark plug condition
29 ATX concerns
End Of Sie

TROUBLESHOOTING

TROUBLESHOOTING
MIL is illuminated incorrectly.
Starter does not work.
Starter cranks engine at normal speed but engine requires ecessive
cranking time before starting.
After start/at idle Engine stops unepectedly at idle and/or after start.
Starter cranks engine at normal speed but engine will not run.
Engine takes more time than normal to return to idle speed.
Engine speed fluctuates between specified idle speed and lower
speed and engine shakes ecessively.
Engine speed continues at fast idle after warm-up.
Engine runs after ignition switch is turned to off.
Engine stops unepectedly at beginning of deceleration or recovery
from deceleration.
Engine stops unepectedly at beginning of acceleration or during
Acceleration/cruise acceleration.
Engine stops unepectedly while cruising.
Acceleration/cruise Engine speed fluctuates during acceleration or cruising.
Acceleration/cruise Engine misses during acceleration or cruising.
Acceleration/cruise/
Vehicle bucks/jerks during acceleration, cruising, or deceleration.
deceleration
Acceleration Momentary pause at beginning of acceleration or during acceleration
Acceleration/cruise Momentary minor irregularity in engine output
Performance is poor under load.
Acceleration/cruise
(e.g., power down when climbing hills)
Sound is produced when air/fuel miture is ignited by something other
Acceleration/cruise
than spark plug. (e.g., hot spot in combustion chamber)
Fuel economy is unsatisfactory.
Fails emissions test.
Oil consumption is ecessive.
Overheating Engine runs at higher than normal temperature/overheats.
Runs cold Engine does not reach normal operating temperature.
Blue, black, or white smoke from ehaust system
Gasoline fuel smell or visible leakage
Engine noise from under hood
Vibration from under hood or driveline
A/C compressor magnetic clutch does not engage when A/C is turned
on.
A/C compressor magnetic clutch does not disengage.
A/C compressor magnetic clutch does not disengage under WOT.
Rotten egg smell (sulphur) from ehaust
Incorrect constant voltage
Incorrect spark plug condition
Upshift/downshift/
ATX concerns not related to engine performance
engagement
DESCRIPTION
—
A6E398018881W01
F
F–181