NTC-1A No Trouble Code Menu - Start Here
NOTE: Perform TEST TC-1A before proceeding.
1. Check for Technical Service Bulletins and manual updates that relate to the symptoms.
NO TROUBLE CODE INDIVIDUAL TEST
- If you suspect any of the items in the menu below to be the cause of the driveability problem, perform the associated test(s) individually.
- If problem still exists, perform NO TROUBLE CODE COMPLETE TEST, in sequence, until the problem is located.
NO TROUBLE CODE COMPLETE TEST
2. If there are no obvious suspects, perform TESTS NTC-2A through NTC-16A, in sequence, until the problem is located.
Secondary Ignition And Timing NTC- 2A NTC-2A Checking Secondary Ignition and Timing
Fuel Pressure NTC- 3A NTC-3A Checking Fuel Pressure
Coolant Sensor Cal. and Rad Fan Operation NTC- 4A NTC-4A Checking ECT Calibration and RAD Fan Operation
Throttle Position Sensor Calibration NTC- 5A NTC-5A Checking Throttle Position Sensor Calibration
Map Sensor Calibration NTC- 6A NTC-6A Checking MAP Sensor Calibration
Oxygen Sensor Switching NTC- 7A NTC-7A Checking For Oxygen Sensor Switching
Oxygen Sensor Heating NTC- 8A NTC-8A Checking Oxygen Sensor Heating
Idle Air Control Motor Operation NTC- 9A NTC-9A Checking Idle Air Control Motor
Solenoid Operation NTC-10A NTC-10A Checking Solenoid Operation
Park/neutral Switch (MVLPS) NTC-11A NTC-11A Checking Park/Neutral Safety Switch (MVLPS)
PCM Power & Ground Circuits NTC-12A NTC-12A Checking the PCM Power & Ground Circuits
EGR System NTC-13A NTC-13A Checking the EGR System
Engine Vacuum NTC-14A NTC-14A Checking the Engine Vacuum
Minimum Idle Air Flow NTC-15A NTC-15A Checking the Minimum Idle Air Flow
Engine Mechanical Systems NTC-16A NTC-16A Checking the Engine Mechanical Systems
NO TROUBLE CODE SYMPTOM CHECKS
NOTE: The following tests cannot be used properly unless the driveability problem actually occurs while the vehicle is being tested.
TIP: To reduce diagnostic time, familiarize yourself with TC-1A and the appropriate diagnostic sections prior to attempting diagnosis.
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 above.
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,10A,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/Unstable/Erratic Idle NO TROUBLE CODE COMPLETE TEST above.
Poor Fuel Economy NO TROUBLE CODE COMPLETE TEST above.