DTC U0001-88: High Speed CAN Communication CAN Bus - Bus off: Action
- Check the powertrain control module and anti-lock brake system control module for other CAN bus off DTCs and refer to the relevant DTC index. Refer to the appropriate system wiring diagrams and check the module connector and power/ground circuits. Refer to network communication service information. Using the manufacturers approved diagnostic system, complete a CAN integrity test. Check fuses, examine fuse-box for water ingress, moisture or loose plugs. Refer to the appropriate system wiring diagrams and connect an Ohm meter between the pins for CAN high and CAN low. If the resistance is 0 Ohm with a short circuit at CAN bus, renew the transmission control module. If the resistance is infinite with open circuit at CAN bus, renew the transmission control module. A correct resistance should be approximately 40kOhm