Toyota Tundra Service Manual > Touch Select 2-4 And High-low System: Lost Communication with ECM / PCM "A" (U0100,U0122)
DESCRIPTION This DTC is detected if communication is lost between the ECM and skid control ECU. DTC Code DTC Detection Condition Diagnosis Condition Malfunction Status Malfunction Time Other Trouble Area U0100 Ignition switch ON Communication is lost between ECM and 4 wheel drive control ECU 5 secon ...
