Symptom Diagnostic Index

Confirm trouble symptom using the following diagnostic index, then go to appropriate troubleshooting chart.

DIAGNOSTIC INDEX

No.	TROUBLESHOOTING ITEM		DESCRIPTION
1	Melting of main or other fuses		-
2	MIL illuminates		The MIL is illuminated incorrectly.
3	Will not crank		The starter does not work.
4	Hard to start/long crank/erratic start/erratic crank		The starter cranks the engine at normal speed but the engine requires excessive cranking time before starting. The battery is in normal condition.
5	Engine stalls	After start/at idle	The engine stops unexpectedly at idle and/or after start.
6	Cranks normally but will not start		The starter cranks the engine at normal speed but the engine will not run. Refer to the symptom troubleshooting "NO.5 ENGINE STALLS-AFTER START/AT IDLE " if this symptom appears after engine stall. Fuel is in the tank. Battery is in normal condition.
7	Slow return to idle		The engine takes more time than normal to return to idle speed.
8	Engine runs rough/rolling idle		The engine speed fluctuates between the specified idle speed and lower speed and the engine shakes excessively. The idle speed is too slow and the engine shakes excessively.
9	Fast idle/runs on		The engine speed continues at fast idle after warm-up. The engine runs after the ignition switch is turned off.
10	Low idle/stalls during deceleration		The engine stops unexpectedly at the beginning of deceleration or recovery from deceleration.
11	Engine stalls/quits	Acceleration/cruise	The engine stops unexpectedly at beginning of acceleration or during acceleration. The engine stops unexpectedly while cruising.
	Engine runs rough	Acceleration/cruise	The engine speed fluctuates during acceleration or cruising.
	Misses	Acceleration/cruise	The engine misses during acceleration or cruising.
	Buck/jerk	Acceleration/cruise/deceleration	The vehicle bucks/jerks during acceleration, cruising, or deceleration.
	Hesitation/stumble	Acceleration	Momentary pause at beginning of acceleration or during acceleration.
	Surges	Acceleration/cruise	Momentary minor irregularity in engine output.
12	Lack/loss of power	Acceleration/cruise	Performance is poor under load (such as power down when climbing hills).
13	Knocking/pinging	Acceleration/cruise	Sound is produced when air/fuel mixture is ignited by something other than spark plug (such as hot spot in combustion chamber).
14	Poor fuel economy		Fuel economy is unsatisfactory.
15	Emission compliance		Fails emissions test.
16	High oil consumption/leakage		Oil consumption is excessive.
17	Cooling system concerns Overheating		The engine runs at higher than normal temperature/overheats.
18	Cooling system concerns Runs cold		The engine does not reach normal operating temperature.
19	Exhaust smoke		Blue, black, or white smoke from exhaust system.
20	Fuel odor (in engine compartment)		Gasoline fuel smell or visible leakage.
21	Engine noise		Engine noise from under hood.
22	Vibration concerns (engine)		Vibration from under hood or driveline.
23	A/C does not work sufficiently		The A/C compressor magnetic clutch does not engage when the A/C is turned on.
24	A/C is always on or A/C compressor runs continuously		The A/C compressor magnetic clutch does not disengage.
25	A/C is not cut off under wide open throttle conditions		The A/C compressor magnetic clutch does not disengage under WOT.
26	Exhaust sulphur smell		Rotten egg smell (sulphur) from exhaust.
27	Fuel refill concerns		Fuel tank does not fill smoothly.
28	Fuel filling shut off concerns		Fuel does not shut off properly.
29	Spark plug condition		Incorrect spark plug condition.
30	ATX concerns	Upshift/downshift/engagement	ATX concerns not related to engine performance.