Engine mechanism - Engine assembly
CO
HC
Trouble occurrence
Possible causes
28
Normal
High
Unstable idle speed
Low
High
Unstable idle speed
(HC readings not stable)
High
High
Unstable idle speed
(black smoke emission)
1. Ignition system malfunction
Ignition timing incorrect
Spark plug too dirty, short circuit or clearance
incorrect
2. Valve clearance incorrect
3. Air inlet and exhaust valve leaky
4. Cylinder leaky
1. Vacuum leak:
PCV hose
Intake manifold
Throttle body
Idle speed stepping motor
Vacuum booster and pipelines
2. Fire caused by too thin mixing ratio
1. Air filter core blocked
2. PCV valve blocked
3. EFI system malfunction
Fuel pressure regulator malfunction
Water temperature sensor malfunction
Intake pressure sensor malfunction
ECU malfunction
Injection nozzle malfunction
Throttle position sensor malfunction
Summary of Contents for FC
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Page 302: ...Light Side turning light Side turning light Components Side turning light 291 ...
Page 409: ...Electric glass lifter Electrical schematic diagram Electric glass lifter 398 ...
Page 412: ...Electric rearview mirror Electrical schematic diagram Electric rearview mirror 401 ...
Page 413: ...Reversing radar system Electrical schematic diagram Reversing radar system 402 ...
Page 414: ...Safety airbag system Electrical schematic diagram Safety airbag system 403 ...
Page 418: ...Combination instrument Electrical schematic diagram Combination instrument 407 ...