REMOVAL PROCEDURE 1. PRECAUTION NOTICE: After turning the ignition switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work. Click here 2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system. NOTICE: When disconnecting the cable, some systems need to be initialized after the cable is reconnected. Click here 3. REMOVE FRONT DOOR SCUFF PLATE LH (a) for Double Cab: Click here (b) for CrewMax: Click here 4. REMOVE COWL SIDE TRIM BOARD LH (a) for Double Cab: Click here (b) for CrewMax: Click here 5. REMOVE INSTRUMENT SIDE PANEL LH (a) for Column Shift Type: Click here (b) for Floor Shift Type: Click here 6. REMOVE LOWER INSTRUMENT PANEL FINISH PANEL SUB-ASSEMBLY LH (a) for Column Shift Type: Click here (b) for Floor Shift Type: Click here 7. REMOVE LOWER NO. 1 INSTRUMENT PANEL AIRBAG ASSEMBLY Click here 8. REMOVE GLASS BREAKAGE SENSOR ECU 
(a) Disconnect each connector. (b) Remove the 2 nuts and junction block.
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Toyota Tundra Service Manual > 4wd Control Switch: On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT INDICATOR LIGHT (a) Inspect the 4HI Indicator Light: (1) Start the engine. (2) Change the 4WD control switch from 2WD to 4H. (3) Check the 4HI indicator light. OK: The 4HI indicator light comes on or the 4HI indicator light comes on after it is blinking. If ...
