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Code 10 - Air Temperature (Ta) Sensor

  1. Turn ignition off. Remove appropriate fuse for 10 seconds to reset ECU. See ECU RESET FUSE CHART  . Start engine. Verify if CHECK ENGINE light is on and if LED is flashing Code 10. If Code 10 is present, go to next step. If Code 10 is not present, problem is intermittent. Check connectors at TA sensor and related circuits.
  2. Turn ignition off. Disconnect TA sensor connector, and measure resistance across TA sensor terminals. If resistance reading is not 1000-4000 ohms, replace TA sensor. If resistance reading is as specified, disconnect ohmmeter, and turn ignition on. Measure voltage between ground and Red/Yellow wire terminal. If voltage is about 5 volts, go to step 3). If voltage is not about 5 volts, go to step 4).
  3. Measure voltage between Red/White (+) and Green/White (-) wires. If voltage is not about 5 volts, repair open circuit in Green/White wire between ECU terminal C12 and TA sensor. If voltage is about 5 volts, substitute a known good ECU, and recheck. If condition is corrected, replace original ECU.
  4. Repair open or short in Red/Yellow wire between ECU terminal C5 and TA sensor. If wire is okay, substitute a known good ECU, and recheck. If condition is corrected, replace original ECU.
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