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/Preliminary Vehicle Diagnosis Worksheet.pdf
PRELIMINARY VEHICLE DIAGNOSIS WORKSHEET The purpose of this form is to help you gather some preliminary information on your vehicle before you retrieve any codes By having a complete account of your vehicle s current problem s you will be able to systematically pinpoint the problem s by comparing your answers to the fault codes you retrieve You can also provide this information to your mechanic to guide him or her in the right direction and possibly avoid any costly and unnecessary diagnostics or repairs It is important for you to complete this form to help you and or your mechanic have a clear understanding of your vehicle s problem s NAME DATE VIN VIN Vehicle Identification Number found at the base of the windshield on a metallic plate or at the driver door latch area Please consult your vehicle owner s manual YEAR MAKE MODEL ENGINE SIZE VEHICLE MILEAGE TRANSMISSION Automatic Manual Please check all items that apply in all categories DESCRIBE THE PROBLEM WHEN DID YOU FIRST NOTICE THE PROBLEM Just Started Started Last Week Started Last Month Other LIST ANY PREVIOUS REPAIRS D ONE IN THE PAST 6 MONTHS PROBLEMS STARTING No Symptoms Will Not Crank Cranks But Will Not Start Starts But Takes A Long Time ENGINE QUITS OR STALLS No Symptoms Right After Starting When Shifting Into Gear During Steady Speed Driving Right After Vehicle Comes To a Stop While Idling During Acceleration When Parking IDLING CONDITIONS No Symptoms Is Too Slow At All Times Is Too Fast Sometimes It s Too Fast or Too Slow Is Rough or Uneven Fluctuates Up and Down RUNNING CONDITIONS No Symptoms Runs Rough Lacks Power Bucks and Jerks Poor Fuel Economy Hesitates or Stumbles On Accelerations Backfires Misfires or Cuts Out Engine Knocks Pings or Rattles Surges Dieseling or Run On AUTOMATIC TRANSMISSION PROBLEMS if applicable No Symptoms Shifts too early or too late Changes Gear Incorrectly Vehicle Does Not Move When In Gear Jerks or Bucks PROBLEM OCCURS Morning Afternoon Anytime ENGINE TEMPERATURE WHEN PROBLEM IS NOTICED Cold Warm Hot DRIVING CONDITIONS WHEN PROBLEM OCCURS Short Less Than 2 Miles 2 10 Miles Long More Than 10 Miles Stop and Go While Turning While Braking At Gear Engagement With A C Operating With Headlights On During Acceleration Mostly Driving Downhill Mostly Driving Uphill Mostly Driving Level Mostly Driving Curvy Roads Driving on Rough Roads DRIVING HABITS Mostly City Driving Highway Park Vehicle Inside Park Vehicle Outside Drive Less Than 10 Miles Per Day Drive 10 to 50 Miles Per Day Drive More Than 50 Miles Per Day GASOLINE USED 87 Octane 89 Octane 91 Octane More than 91 Octane WEATHER CONDITIONS WHEN PROBLEM OCCURS 32 55 F 0 13 C Below Freezing 32 F 0 C Above 55 F 13 C CHECK ENGINE LIGHT DASH WARNING LIGHT Light on Sometimes Light on Always Light Never On PECULIAR SMELLS Hot Sulfur rotten egg Burning Rubber Gasoline Oil Burning Electrical STRANGE NOISES Rattle Knock Squeak Other
