NTC-1A No Trouble Code Menu - Start Here
Perform TEST TC-1A Before Proceeding
1. Check for Technical Service Bulletins and manual updates that are related to the symptoms.
NO TROUBLE CODE COMPLETE TEST
Perform TESTS NTC-2A through NTC-16A--in sequence--until the problem is located.
NO TROUBLE CODE MENU
Checking Secondary Ignition And Timing NTC-2A Checking Secondary Ignition and Timing
Checking Fuel Pressure NTC-3A Checking Fuel Pressure
Checking Coolant Sensor Cal. and Rad. Fan Operation NTC-4A Checking ECT Calibration and RAD Fan Operation
Checking TPS Calibration NTC-5A Checking Throttle Position Sensor Calibration
Checking MAP Sensor Calibration NTC-6A Checking MAP Sensor Calibration
Checking Oxygen Sensor Switching NTC-7A Checking For Oxygen Sensor Switching
Checking Oxygen Sensor Heater NTC-8A Checking Oxygen Sensor Heating
Checking Idle Air Control Motor NTC-9A Checking Idle Air Control Motor
Checking Solenoid Operation NTC-10A Checking Solenoid Operation
Checking Park/neutral Switch NTC-11A Checking Park/Neutral Safety Switch Input
Checking PCM Power and Ground Circuits NTC-12A Checking the PCM Power & Ground Circuits
Checking EGR System NTC-13A Checking the EGR System
Checking Engine Vacuum NTC-14A Checking the Engine Vacuum
Checking Minimum Idle Air Flow NTC-15A Checking the Minimum Idle Air Flow
Checking Engine Mechanical Systems NTC-16A Checking the Engine Mechanical Systems
NO TROUBLE CODE QUICK INDIVIDUAL TEST
If you suspect any of the above items to be the cause of the vehicle's driveability problem, perform the associated test(s) individually. Return to the No Trouble Code menu if driveability problem still exists, or perform No Trouble Code Complete Test.
NO TROUBLE CODE QUICK SYMPTOM TEST
Symptom checks cannot be used properly unless the driveability problem characteristic actually happens while the vehicle is being tested. To reduce diagnostic time, ensure that TC-1A and appropriate GENERAL INFORMATION sections have been reviewed before attempting to diagnose a symptom.
Select the symptom that most accur5ately describes the vehicle`s driveability problem and then perform the test routine the pertains to this symptom. Perform each routine test in sequence until the problem is found.
Symptom Diagnostic Test Routine
Hard Start NTC-2A,3A,4A,5A,6A,7A,9A,12A,15A,16A
Start and Stall NTC-2A,3A,4A,5A,6A,9A,12A,16A
Hesitation/Sag/Stumble No Trouble Code Complete Test (Step 1)
Surge NTC-2A,3A,4A,5A,6A,7A,9A,12A,13A,16A
Lack of Power Sluggish NTC-2A,3A,4A,5A,6A,7A,9A,12A,14A,16A
Spark Knock/Detonation NTC-2A,3A,4A,5A,6A,7A,9A,12A,13A,16A
Cuts Out/Misses NTC-2A,3A,7A,10A,12A,14A,16A
Backfire/Popback NTC-2A,3A,6A,7A,12A,14A,16A
Runs Rough/Idle Erratic No Trouble Code Complete Test (Step 1)
Poor Fuel Economy No Trouble Code Complete Test (Step 1)