Fault Diagnosis

Engine

• Engine fails to rotate when attempting to start
• Engine rotates, but will not start
• Engine difficult to start when cold
• Engine difficult to start when hot
• Starter motor noisy or excessively-rough in engagement
• Engine starts, but stops immediately
• Engine idles erratically
• Engine misfires at idle speed
• Engine misfires throughout the driving speed range
• Engine hesitates on acceleration
• Engine stalls
• Engine lacks power
• Engine backfires
• Oil pressure warning light illuminated with engine running
• Engine runs-on after switching off
• Engine noises

Cooling system

• Overheating
• Overcooling
• External coolant leakage
• Internal coolant leakage
• Corrosion

Fuel and exhaust systems

• Excessive fuel consumption
• Fuel leakage and/or fuel odour
• Excessive noise or fumes from exhaust system

Clutch

• Pedal travels to floor - no pressure or very little resistance
• Clutch fails to disengage (unable to select gears)
• Clutch slips (engine speed increases, with no increase in vehicle speed)
• Judder as clutch is engaged
• Noise when depressing or releasing clutch pedal

Manual gearbox

• Noisy in neutral with engine running
• Noisy in one particular gear
• Difficulty engaging gears
• Jumps out of gear
• Vibration
• Lubricant leaks

Automatic transmission

• Fluid leakage
• Transmission fluid brown, or has burned smell
• General gear selection problems
• Transmission will not downshift (kickdown) with accelerator fully depressed
• Engine will not start in any gear, or starts in gears other than Park or Neutral
• Transmission slips, shifts roughly, is noisy, or has no drive in forward or reverse gears

Driveshafts

• Clicking or knocking noise on turns (at slow speed on full-lock)
• Vibration when accelerating or decelerating

Braking system

• Vehicle pulls to one side under braking
• Noise (grinding or high-pitched squeal) when brakes applied
• Excessive brake pedal travel
• Brake pedal feels spongy when depressed
• Excessive brake pedal effort required to stop vehicle
• Judder felt through brake pedal or steering wheel when braking
• Brakes binding
• Rear wheels locking under normal braking

Suspension and steering systems

• Vehicle pulls to one side
• Wheel wobble and vibration
• Excessive pitching and/or rolling around corners, or during braking
• Wandering or general instability
• Excessively-stiff steering
• Excessive play in steering
• Lack of power assistance
• Tyre wear excessive

Electrical system

• Battery will not hold a charge for more than a few days
• Ignition/no-charge warning light remains illuminated with engine running
• Ignition/no-charge warning light fails to come on
• Lights inoperative
• Instrument readings inaccurate or erratic
• Horn inoperative, or unsatisfactory in operation
• Windscreen/tailgate wipers inoperative, or unsatisfactory in operation
• Windscreen/tailgate washers inoperative, or unsatisfactory in operation
• Electric windows inoperative, or unsatisfactory in operation
• Central locking system inoperative, or unsatisfactory in operation