Mazda Mazda6 - Page 148

F1–60
TROUBLESHOOTING
X: Applicable
Possible factor
Troubleshooting item
Injectors malfunction (Leakage or clogging, inope-rative Fuel leakage from fuel system (including insulator, injector O-ring) Fuel filters restriction or clogging CMP sensor is damaged. (e.g. open or short circuit) Camshaft is damaged. Improper air/fuel mixture ratio control Exhaust system restriction or clogging Catalytic converter malfunction EGR system malfunction (Unleaded gasoline models) EVAP control system malfunction PCV valve malfunction Constant voltage supply circuit malfunction Main relay malfunction (Mechanically or electrically) ECT sensor malfunction TR sensor misadjustment (ATX) TR sensor malfunction (ATX) Break switch and related circuit malfunction Manifold absolute pressure sensor and related circuit malfunction HO2S and related circuit malfunction (Unleaded gasoline models) Variable resistor misadjustment (Leaded gasoline models) Improper electrically controlled 4WD system operation
1 Melting of main or other fuses
2 MIL illuminates x x x x x x x
3 Will not crank xx
4 Hard to start/lon
g
crank/erratic start/erratic
crank
x xx xxx x
5 Engine stalls. After start/at idle x x x x x x x x x
6 Cranks normally but will not start x x x x xxxxx x
7 Slow return to idle x
8 Engine runs rough/rolling idle x xxxxx xxx x
9 Fast idle/runs on x
10 Low idle/stalls during deceleration x x x x x
En
g
ine stalls/
q
uits
.
Acceleration/cruis
e
x xxxxx xxxxx x
En
g
ine runs rou
g
h. Acceleration/cruis
e
x xxxxx xxxxx x
Misses Acceleration/cruis
e
x xxxxx xxxxx x
Buck/jerk Acceleration/cruise/
deceleration
x xxxxx xxxxx x
Hesitation/stumble Acceleration x xxxxx xxxxx x
11
Surges Acceleration/cruise x xxxxx xxxxx x
12 Lack/loss of power Acceleration/cruise x x x x x x x x
13 Knocking/pinging Acceleration/cruise x
14 Poor fuel economy x x x x x x
15 Emission compliance xxxxxxxxx x
16 High oil consumption/leakage x
17 Cooling system concerns Overheating
18 Cooling system concerns Runs cold
19 Exhaust smoke x x
20 Fuel odor (in engine compartment) x x
21 Engine noise
22 Vibration concerns (engine) x
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 x x
27 Constant voltage x x x x x
28 Spark plug condition x x x x
29 ATX concerns Upshift/downshift/en
gagement
See Section K, TROUBLESHOOTING
A6E39802003