REMOVAL PROCEDURE 1. REMOVE NO. 1 ENGINE UNDER COVER 2. REMOVE DIFFERENTIAL VACUUM ACTUATOR ASSEMBLY  (a) Disconnect the differential actuator hose. (b) Disconnect the differential actuator connector. (c) Remove the 4 bolts and differential vacuum actuator assembly. |
Toyota Tundra Service Manual > Touch Select 2-4 And High-low System: Automatic Disconnecting Differential Motor Limit Switch Circuit (P17A4)
DESCRIPTION When the A.D.D. actuator is switching between 2WD and 4WD, the DL1 and DL2 terminals of the limit switch are in one of the ON/OFF combinations listed in the table below. Terminal In 2WD Switching between 2WD and 4WD In 4WD DL1 OFF (OPEN) ON (GND) ON (GND) DL2 ON (GND) ON (GND) OFF (OPEN) ...
