OPERATION CHECK CHECK PRE-COLLISION SYSTEM SETTING (a) Turn the ignition switch to ON. (b) Operate the steering pad switch assembly to change the setting of PCS on the multi-information display to "On" and check that the pre-collision system turns on. HINT: When the ignition switch is turned to ON, the pre-collision system will automatically turn on. This can be changed through a customize setting using the Techstream. (c) Operate the steering pad switch assembly to change the PCS setting to "Off" and check that the PCS warning light illuminates. 
CHECK PRE-COLLISION SYSTEM SENSITIVITY SETTING (a) Turn the ignition switch to ON. (b) Operate the steering pad switch assembly to select Change PCS Sensitivity and check that the warning timing adjustment display on the multi-information display changes between "Far", "Mid" and "Near" accordingly. HINT:
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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 ...
