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TROUBLESHOOTING
Troubleshooting CONTENTS Section
Symptom
Engine Engine will not rotate when attempting to start Engine rotates but will not start Starter motor operates without turning engine Engine hard to start when cold Engine hard to start when hot Starter motor noisy or engages roughly Engine starts but stops immediately Engine lopes' while idling or idles erratically Engine misses at idle speed Excessively high idle speed Battery will not hold a charge Alternator light stays on Alternator light fails to come on when key is turned on Engine misses throughout driving speed range Hesitation cr stumble during acceleration Engine stalls Engine lacks power Engine backfires Engine surges while holding accelerator steady Pinging or knocking engine sounds when engine is under load Engine diesels (continues to run) after being turned off Low oil pressure Excessive oil consumption Excessive fuel consumption Fuel odor Miscellaneous engine noises
Cooling system 27 Overheating 28 Overcooling 29 External coolant leakage 30 Internal coolant leakage 31 Abnormal coolant loss 32 Poor coolant circulation 33 Corrosion
Clutch 34 35 36 37 38 39
Fails to release (pedal pressed to the floor - shift lever does not move freely in and out of Reverse) Clutch slips (engine speed increases with no increase in vehicle speed) Grabbing (chattering) as clutch is engaged Squeal or rumble with clutch fully engaged (pedal released) Squeal or rumble with clutch fully disengaged (pedal depressed) Clutch pedal stays on floor when disengaged
Manual transmission 40 41
Noisy in Neutral with engine running Noisy in all gears
Section
42 43 44 45
Symptom
Noisy in one particular gear Slips out of high gear Difficulty in engaging gears Oil leakage
Automatic transmission 46 47 48 49
General shift mechanism problems Transmission will not downshift with accelerator pedal pressed to the floor Transmission slips, shifts rough, is noisy or has no drive in forward or reverse gears Fluid leakage
Transfer case 50 51 52 53
Transfer case is difficult to shift into the desired range Transfer case noisy in all gears Noisy or jumps out of four-wheel drive Low range Lubricant leaks from the vent or output shaft seals
Driveshaft 54 55 56 57
Oil leak at front of driveshaft Knock or clunk when the transmission is under initial load (just after transmission is put into gear) Metallic grinding sound consistent with vehicle speed Vibration
Axles 58 59 60
Noise Vibration Oil leakage
Brakes 61 62 63 64 65 66 67
Vehicle pulls to one side during braking Noise (high-pitched squeal with the brakes applied) Excessive brake pedal travel Brake pedal feels spongy when depressed Excessive effort required to stop vehicle Pedal travels to the floor with little resistance Brake pedal pulsates during brake application
Suspension and steering systems 68 69 70 71 72 73 74 75 76 77
Vehicle pulls to one side Shimmy, shake or vibration Excessive pitching and/or rolling around corners or during braking Excessively stiff steering Excessive play in steering Lack of power assistance Excessive tire wear (not specific to one area) Excessive tire wear on outside edge Excessive tire wear on inside edge Tire tread worn in one place