On-vehicle Inspection ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT MAIN BODY ECU (ACC RELAY)  (a) Measure the resistance of the ACC relay circuit. (1) Measure the resistance according to the value(s) in the table below. Standard Resistance:
If the result is not as specified, replace the main body ECU. |
Toyota Tundra Service Manual > Can Communication System: Main Body ECU Communication Stop Mode
DESCRIPTION Detection Item Symptom Trouble Area Main Body ECU Communication Stop Mode Any of the following conditions are met: Communication stop for "Main Body" is indicated on the "Communication Bus Check" screen of the Techstream. Communication system DTCs (DTCs that start with U) that correspond ...
