Symptom Diagnostic Index

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

DIAGNOSTIC INDEX

No.	TROUBLESHOOTING ITEM		DESCRIPTION	PAGE
1	Melting of main or other fuses		-	(See NO. 1 MELTING OF MAIN OR OTHER FUSES .)
2	MIL illuminates		The MIL is illuminated incorrectly.	(See NO. 2 MIL ILLUMINATES .)
3	Will not crank		The starter does not work.	(See NO. 3 WILL NOT CRANK .)
4	Hard to start/long crank/erratic start/erratic crank		The starter cranks engine at normal speed but engine requires excessive cranking time before starting. The battery is in normal condition.	(See NO. 4 HARD TO START/LONG CRANK/ERRATIC START/ERRATIC CRANK .)
5	Engine stalls	After start/at idle	Engine stops unexpectedly.	(See NO. 5 ENGINE STALLS-AFTER START/AT IDLE .)
6	Cranks normally but will not start		The starter cranks engine at normal speed but the engine will not run.	(See NO. 6 CRANKS NORMALLY BUT WILL NOT START .)
7	Slow return to idle		Engine takes more time than normal to return to idle speed.	(See NO. 7 SLOW RETURN TO IDLE .)
8	Engine runs rough/rolling idle		Engine speed fluctuates between specified idle speed and lower speed and engine shakes excessively. Idle speed is too slow and engine shakes excessively.	(See NO. 8 ENGINE RUNS ROUGH/ROLLING IDLE .)
9	Fast idle/runs on		The engine speed continues at fast idle after warm-up. The engine runs after the ignition is off.	(See NO. 9 FAST IDLE/RUNS ON .)
10	Low idle/stalls during deceleration		Engine stops unexpectedly at the beginning of deceleration or recovery from deceleration.	(See NO. 10 LOW IDLE/STALLS DURING DECELERATION .)
11	Engine stalls/quits	Acceleration/cruise	Engine stops unexpectedly at the beginning of acceleration or during acceleration. Engine stops unexpectedly while cruising.	(See NO. 11 ENGINE STALLS/QUITS, ENGINE RUNS ROUGH, MISSES, BUCK/JERK, HESITATION/STUMBLE, SURGES .)
	Engine runs rough	Acceleration/cruise	Engine speed fluctuates during acceleration or cruising.
	Misses	Acceleration/cruise	Engine misses during acceleration or cruising.
	Buck/jerk	Acceleration/cruise/deceleration	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).	(See NO. 12 LACK/LOSS OF POWER-ACCELERATION/CRUISE .)
13	Knocking/pinging	Acceleration/cruise	Sound is heard when air/fuel mixture is ignited by something other than spark plug (such as hot spot in combustion chamber).	(See NO. 13 KNOCKING/PINGING-ACCELERATION/CRUISE .)
14	Poor fuel economy		Fuel economy is unsatisfactory.	(See NO. 14 POOR FUEL ECONOMY .)
15	Emission compliance		Fails emissions test.	(See NO. 15 EMISSION COMPLIANCE .)
16	High oil consumption/leakage		Oil consumption is excessive.	(See NO. 16 HIGH OIL CONSUMPTION/LEAKAGE .)
17	Cooling system concerns	Overheating	Engine runs at higher than normal temperature/overheats.	(See NO. 17 COOLING SYSTEM CONCERNS-OVERHEATING .)
18	Cooling system concerns	Runs cold	Engine takes excessive time to reach normal operating temperature.	(See NO. 18 COOLING SYSTEM CONCERNS-RUNS COLD .)
19	Exhaust smoke		Blue, black, or white smoke from exhaust system.	(See NO. 19 EXHAUST SMOKE .)
20	Fuel odor (in engine compartment)		Gasoline fuel smell or visible leakage.	(See NO. 20 FUEL ODOR (IN ENGINE COMPARTMENT) .)
21	Engine noise		Engine noise from under hood.	(See NO. 21 ENGINE NOISE .)
22	Vibration concerns (engine)		Vibration from under hood or driveline.	(See NO. 22 VIBRATION CONCERNS (ENGINE) .)
23	A/C does not work sufficiently		A/C compressor magnetic clutch does not engage when the A/C switch is turned on.	(See NO. 23 A/C DOES NOT WORK SUFFICIENTLY .)
24	A/C is always on or A/C compressor runs continuously		A/C compressor magnetic clutch does not disengage.	(See NO. 24 A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY .)
25	A/C does not cut off under wide open throttle conditions		A/C compressor magnetic clutch does not disengage under WOT.	(See NO. 25 A/C DOES NOT CUT OFF UNDER WIDE OPEN THROTTLE CONDITIONS .)
26	Exhaust sulphur smell		Rotten egg smell (sulphur) from exhaust.	(See NO. 26 EXHAUST SULPHUR SMELL .)
27	Fuel refill concerns		Fuel tank is not filled smoothly.	(See NO. 27 FUEL REFILL CONCERNS .)
28	Fuel filling shut off concerns		Fuel does not shut off properly.	(See NO. 28 FUEL FILLING SHUT OFF CONCERNS .)
29	Spark plug condition		Incorrect spark plug condition.	(See NO. 29 SPARK PLUG CONDITION .)
30	ATX concerns	Upshift/downshift engagement	ATX concerns not related to engine performance.	(See SYMPTOM TROUBLESHOOTING ITEM TABLE [AY6A-EL] .)