DTC U0073/42 Control Module Communication Bus OFF; DTC U0100/65 Lost Communication with ECM / PCM: Description
WARNING: This page is about a different car, the 2007 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.
The translate ECU inputs the signals from the ECM via the CAN communication system.
DTC DETECTION CONDITION CHART
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| U0073/42 | Both of following conditions are met when IG1 voltage is 0.5 V or higher and vehicle speed is 15 km/h (9 mph) or faster:
|
Communication line between ECM and translate ECU (CAN communication line) |
| U0100/65 | Both of following conditions are met when IG1 voltage is 0.S V or higher and vehicle speed is 15 km/h (9 mph) or faster:
|
Communication line between ECM and translate ECU (CAN communication line) |
HINT:
For CAN communication malfunctions, after the malfunction is determined using the translate ECU, the results are sent to the skid control ECU. In total, this takes 7 seconds.