1.15.3.4 Cold start Rationality Check

A cold start rationality check of the temperature signal (via CAN) is performed by comparing the ambient air temperature with the intake air temperature.

A TUMPnpl fault will be set if the difference (positive) between the measured ambient air and the intake air temperature exceeds an upper calibrated threshold.

A TUMPsig will be set if the difference (positive) between the measured ambient air and the intake air temperature exceeds a lower calibrated threshold.