Mazda Mazda6 Workshop Manual Supplement page 146

QUICK DIAGNOSTIC CHART
Troubleshooting item
1 Melting of main or other fuses
2 MIL illuminates
3 Will not crank
4 Hard to start/long crank/erratic start/erratic
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
11 Engine stalls/quits.
Engine runs rough.
Misses
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
17 Cooling system concerns
18 Cooling system concerns
19 Exhaust smoke
20 Fuel odor (in engine compartment)
21 Engine noise
22 Vibration concerns (engine)
23 A/C does not work sufficiently.
24 A/C is always on or A/C compressor runs
continuously.
25 A/C is not cut off under WOT conditions.
26 Exhaust sulfur smell
27 Constant voltage
28 Spark plug condition
29 ATX concerns
F1–58
TROUBLESHOOTING
Possible factor
x x
After start/at idle
Acceleration/cruise
Acceleration/cruise
Acceleration/cruise
Acceleration/cruise/
deceleration
Acceleration
Acceleration/cruise
Acceleration/cruise
Acceleration/cruise
Overheating
Runs cold
Upshift/downshift
engagement
x x x x
x x x
x x x
x x
x x
x x
x x
x x
x x
x x
x x
x
x x
x x
x x x
x
x
x
See Section K, TROUBLESHOOTING
X:
x
x
x
x x x
x x
x x x x x
x x
x x
x x
x x x
x
A6E398018881202
Applicable
x
x
x
x
x x
x
x
x
x
x
x
x
x
x
A6E39802001