Diagnostic Index

WARNING: This page is about a different variant/trim than selected.

Verify malfunction symptoms using the following diagnostic index, then go to the appropriate troubleshooting chart.

SYMPTOM TROUBLESHOOTING PART DESCRIPTION

TROUBLESHOOTING ITEM		DESCRIPTION
Blown fuses		Fuse is damaged.
Check engine light illuminates		Check engine light illuminates incorrectly.
Will not crank		Starter does not work.
Hard to start/long crank/erratic start/erratic crank		Starter cranks engine at normal speed but engine requires excessive cranking time before starting. Battery is operating normally.
Engine stalls-after start/at idle		Stalling occurs if vehicle is left idling under no load. Stalling occurs when load (electric, A/C) is applied during idling. Stalling occurs if the accelerator pedal is depressed from an idling condition when accelerating from a stop.
Cranks normally but will not start		Cranking occurs but no ignition.
Engine oil warning light illuminated/message related to engine hydraulic pressure malfunction indicated in display		Engine oil warning light illuminated. Message related to engine hydraulic pressure malfunction indicated in display.
Low fuel warning light flashes/message related to low fuel level indicated in display		The low fuel warning light flashes. A message related to a low fuel level is indicated in the display.
Engine runs rough/rolling idle		Idle speed lower than the specification. Idling speed unstable, increases/decreases.
Fast idle/runs on		Engine speed continues at fast idle after warm-up. Engine runs after ignition is switched off.
Low idle/stalls during deceleration		Engine speed decreases when the accelerator pedal is released. Stalls during deceleration with the accelerator pedal fully released. When the accelerator pedal is fully released, vehicle stalls directly after vehicle stops.
Engine stalls/quits, engine runs rough, misses, buck/jerk, hesitation/stumble, surges		Stalling occurs while driving with the throttle open.
Lack/loss of power-acceleration/cruise		Engine speed increase delays when the accelerator pedal is fully depressed.
Knocking/pinging-acceleration/cruise		Abnormal combustion occurs under the condition such as the temperature in the combustion chamber is too high resulting in abnormal noise. Knocking sound occurs from the engine compartment during acceleration.
Poor fuel economy		The fuel consumption is high compared to the customer's expectations or the previous fuel consumption.
Emission compliance		Fails emissions test.
High oil consumption/leakage		Oil consumption is excessive.
Cooling system concerns-overheating		The engine coolant temperature is abnormally high.
Cooling system concerns-runs cold		Engine does not reach normal operating temperature.
Exhaust smoke		Blue, black, or white smoke from exhaust system.
Fuel odor (in engine compartment)		Gasoline fuel smell or visible leakage.
Engine noise		Engine noise from under hood.
Vibration concerns (engine)		Vibration from under hood or driveline.
A/C does not work sufficiently		A/C compressor magnetic clutch does not engage when A/C switch is turned on. Compressor valve inoperative
A/C is always on or A/C compressor runs continuously		A/C compressor magnetic clutch does not disengage.
Sulfuric smell occurs		Rotten egg smell (sulphur) from exhaust.
Fuel refill concerns		Fuel tank does not fill smoothly.
Fuel filling shut off concerns		Fuel does not shut off properly.
Spark plug condition		Incorrect spark plug condition.
No cylinder deactivation		Cylinder deactivation control does not operate.
ATX concerns	Upshift/downshift/engagement	ATX concerns not related to engine performance. (See SYMPTOM TROUBLESHOOTING ITEM TABLE [ET6A-EL, ET6AX-EL] .) (See SYMPTOM TROUBLESHOOTING ITEM TABLE [EV6A-EL, EV6AX-EL] .)