Symptom Troubleshooting[Engine Control System (Z6)]; Engine Symptom Troubleshooting [Z6] - Mazda 3 Workshop Manual

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
SYMPTOM
TROUBLESHOOTING[ENGINE
CONTROL SYSTEM (Z6)]

ENGINE SYMPTOM TROUBLESHOOTING [Z6]

• Confirm trouble symptom using the following diagnostic index, then go to appropriate troubleshooting
chart.
Diagnostic Index
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
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The MIL is illuminated incorrectly.
The starter does not work.
The starter cranks the engine at normal speed but
the engine requires excessive cranking time before
starting.
The engine stops unexpectedly at idle and/or after
After start/at idle
start.
The starter cranks the engine at normal speed but
the engine will not run.
The engine takes more time than normal to return to
idle speed.
The engine speed fluctuates between specified idle
speed and lower speed and the engine shakes
excessively.
The engine speed continues at fast idle after warm-
up.
The engine runs after the ignition switch is turned off.
The engine stops unexpectedly at beginning of
deceleration or recovery from deceleration.
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B3E010318881W32