The TCM requests the ECM to illuminate the MIL via the CAN when the TCM sets the MIL illumination request DTC. If the ECM detects the MIL illumination request signal, the DTC is set.
Condition for running the DTC
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC U0001 High Speed CAN Communication Bus".
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC U0101 Lost Communication with TCM".
Condition for setting the DTC
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC type definitions".
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC type definitions".