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.
TCCS Resistance Tests
The TCCS can be checked using an ohmmeter. Before making resistance tests, turn ignition off and disconnect wiring connectors at ECU. Insert ohmmeter probes into wiring connectors from wire side. Measure resistance at connector terminals, NOT ECU terminals.
| Code No. | Probable Cause |
|---|---|
| 1 | System Normal |
| 2 | Airflow Meter or Circuit,ECU |
| 3 | Ignitor or Circuit, ECU |
| 4 | Water Thermo Sensor or Circuit,ECU |
| 5 | Oxygen Sensor or Circuit, ECU |
| 6 | Ignitor or Circuit, Distributor, ECU |
| 7 | Throttle Position Sensor or Circuit, ECU |
| 8 | Intake Air Temp. Sensor or Circuit, ECU |
| 10 | VSS or Ckt, Main Relay or Ckt, Ignition Ckt, Starter Ckt, ECU |
| 11 | A/C Switch, Throttle Position Sensor or Circuit, ECU |
| 12 | Knock Sensor or Circuit, ECU |
| 13 | Knock Control CPU, ECU |
Use the Manual With the Right Hardware
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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.
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