DTC Detection Logic
| DTC | Trouble diagnosis name | DTC detecting condition | Possible causes |
|---|---|---|---|
| C1A21 | UNIT HIGH TEMP | Temperature detected by the temperature sensor integrated in ICC sensor remains less than -45 °C (-49 °F) or more than 105 °C (221 °F) for 5 seconds or more | Temperature around the ICC sensor becomes extremely low or high |