1 | Fault code | |
2 | Fault storage Activation of malfunction indicator lamp for engine diagnosis (EURO3/4) or CHECK ENGINE (MIL) | after the end of the test period and faults after two successive driving cycles with faults |
3 | Frequency of the test | continuous |
4 | Checked signal or status | Limits for coolant temperature/plausibility |
5 | Fault setting conditions Lower limit Upper limit Plausibility |
Fault, if the resistance is greater than approx. 80 kΩ (approx. -39 °C) Fault, if the resistance is less than approx. 45 Ω (approx. +170 °C) The increase in temperature after a cold start is compared to a stored temperature model (characteristic). Depending on the start temperature and the engine speed, at least +15 °C must be reached after approx. 120 - 1200 s. |
6 | | In the event of a fault, driving continues at a substitute value from the temperature model. If the signal becomes plausible again, the system changes over to the signal from the coolant temperature sensor. |