PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary. PROBLEM SYMPTOM TABLE
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Toyota Tundra Service Manual > Meter / Gauge System: Lost Communication with ECM / PCM "A" (U0100)
DESCRIPTION The combination meter communicates with the ECM via the CAN line. DTC Code DTC Detection Condition Trouble Area U0100 When either of following conditions is detected: Vehicle speed 5 km/h (3 mph) or more and IG voltage 10.5 V or more No communication with ECM continues for 3 seconds or m ...