Set Condition

WARNING: This page is about a different variant/trim than selected.

The failure is detected if at least one of the following malfunctions is verified:

1) Toggle Bit Check and Parity Bit Check: A signal toggle bit and a signal parity bit are sent by the PCM within the CAN message. In order to be sure the message is continuously updated, the value of the toggle bit changes from 0 to 1 and vice versa every two messages. In order to be sure the message is valid, the parity bit value is set so that the sum of specific signals bits (the PDL_POS) of the message content plus the toggle bit plus the parity bit is an even number. If the toggle bit value does not change or the signal parity is not verified for a calibrated amount of time then DTC U11D4 is set.

2) Signal Not Available Check: When the signal is not available, the PCM sends a SNA default value to the TCM. If the TCM reads this value then DTC U11D4 is set.