Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Test NTC-1A: No Trouble Code Test Menu
Select symptom that most accurately describes vehicle's driveability problem. See NO TROUBLE CODE SYMPTOM table. Perform NTC tests that pertain to this symptom. See NO TROUBLE CODE TEST MENU table. Perform NTC test in specified sequence until driveability problem is found.
| Application | Perform NTC Tests |
|---|---|
| Hard Start | 2A , 4A -9A , 12A -13A & 16A -17A |
| Start & Stall | 2A -3A , 5A -9A & 12A |
| Hesitation/Sag/Stumble | 2A -13A & 16A -18A |
| Surge | 2A -3A , 5A -10A , 12A & 16A |
| Lack Of Power/Sluggish | 2A -3A , 5A -10A & 12A |
| Spark Knock/Detonation | 2A -3A , 5A -10A , 12A & 16A |
| Cuts Out/Misses | 2A -3A , 5A , 9A -10A & 12A |
| Backfire | 2A -3A , 5A & 8A -10A |
| Runs Rough/Unstable Idle/Erratic Idle | 2A -13A & 16A -18A |
| Poor Fuel Economy | 2A -13A & 16A -18A |
| Application | Test |
|---|---|
| Checking Secondary Ignition | NTC-2A |
| Checking PCM Power & Ground Circuits | NTC-3A |
| Checking Engine Vacuum | NTC-4A |
| Checking Fuel Delivery/Pressure | NTC-5A |
| Checking ECT Sensor Calibration | NTC-6A |
| Checking TP Sensor Calibration | NTC-7A |
| Checking MAP Sensor Calibration | NTC-8A |
| Checking Minimum Idle Air Flow | NTC-9A |
| Checking HO2S Switching | NTC-10A |
| Checking HO2S Heater | NTC-11A |
| Checking IAC Motor | NTC-12A |
| Checking Engine Mechanical Systems | NTC-13A |
| Checking Brake Switch | NTC-15A |
| Checking EVAP System | NTC-16A |
| Checking IAT Sensor | NTC-17A |
| Checking P/N Switch (A/T) | NTC-18A |
| Checking Oil Pressure Sensor | NTC-19A |
| Checking A/C System | NTC-20A |
| Checking Radiator Fan Operation | NTC-21A |
| Checking Charging System | NTC-22A |
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.