Symptom Diagnostic Index

Confirm trouble symptom using the following diagnostic index, then go to the applicable 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 the normal speed but the engine requires excessive cranking time before starting. The battery is in the 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 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. The fuel is in the tank. The battery is in normal condition.	(See NO. 6 CRANKS NORMALLY BUT WILL NOT START ).
7	Slow return to idle		The engine takes more time than normal to return to idle speed.	(See NO. 7 SLOW RETURN TO IDLE ).
8	Engine runs rough/rolling idle		The engine speed fluctuates between the specified idle speed and a lower speed, and the engine shakes excessively. The idle speed is too slow and the 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 switch is turned off.	(See NO. 9 FAST IDLE/RUNS ON ).
10	Low idle/stalls during deceleration		The 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	The engine stops unexpectedly at the beginning of acceleration or during acceleration. The 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	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	The momentary pause at the beginning of acceleration or during acceleration.
	Surges	Acceleration/cruise	The momentary minor irregularity in the engine output.
12	Lack/loss of power	Acceleration/cruise	The performance is poor under load (e.g. power down when climbing hills).	(See NO. 12 LACK/LOSS OF POWER-ACCELERATION/CRUISE ).
13	Knocking/pinging/detonation	Acceleration/cruise	A sound is produced when the air/fuel mixture is ignited by something other than the spark plug (e.g. hot spot in combustion chamber).	(See NO. 13 KNOCKING/PINGING/DETONATION-ACCELERATION/CRUISE ).
14	Poor fuel economy		The 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		The oil consumption is excessive.	(See NO. 16 HIGH OIL CONSUMPTION/LEAKAGE ).
17	Cooling system concerns	Overheating	The engine runs at higher than normal temperature/overheats.	(See NO. 17 COOLING SYSTEM CONCERNS-OVERHEATING ).
18	Cooling system concerns	Runs cold	The engine takes excessive time to reach the normal operating temperature.	(See NO. 18 COOLING SYSTEM CONCERNS-RUNS COLD ).
19	Exhaust smoke		Blue, black, or white smoke from the exhaust system.	(See NO. 19 EXHAUST SMOKE ).
20	Fuel odor (in engine compartment)		Gasoline fuel odor or visible leakage.	(See NO. 20 FUEL ODOR (IN ENGINE COMPARTMENT) ).
21	Engine noise		Engine noise from under the 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		The 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		The 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 is not cut off under wide open throttle conditions		The A/C compressor magnetic clutch does not disengage under wide open throttle.	(See NO. 25 A/C IS NOT CUT OFF UNDER WIDE OPEN THROTTLE CONDITIONS ).
26	Exhaust sulphur smelt		Rotten egg smell (sulphur) from exhaust.	(See NO. 26 EXHAUST SULPHUR SMELL ).
27	Fuel refill concerns		The fuel tank does not fill smoothly.	(See NO. 27 FUEL REFILL CONCERNS ).
28	Fuel filling shut off concerns		The fuel does not shut off property.	(See NO. 28 FUEL FILLING SHUT OFF CONCERNS ).
29	Spark plug condition		Incorrect spark plug condition.	(See NO. 29 SPARK PLUG CONDITION ).
30	AT concerns	Upshift/downshift engagement	AT concerns not related to engine performance.	(See SYMPTOM TROUBLESHOOTING ITEM TABLE ).