INSPECTION PROCEDURE 1. INSPECT REAR DOOR LOCK ASSEMBLY LH (a) Check the door lock motor. (1) Apply battery voltage to the door lock and check operation of the door lock. 
OK:
(b) Check the door lock position switch. (1) Measure the resistance according to the value(s) in the table below. Standard resistance:
2. INSPECT REAR DOOR LOCK ASSEMBLY RH (a) Check the door lock motor. (1) Apply battery voltage to the door lock and check operation of the door lock. 
OK:
(b) Check the door lock position switch. (1) Measure the resistance according to the value(s) in the table below. Standard resistance:
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Toyota Tundra Service Manual > Audio And Visual System: Vehicle Speed Signal Circuit between Radio Receiver and Combination Meter
DESCRIPTION Audio function: This circuit is necessary for the automatic sound levelizer (ASL) built into the radio and display receiver assembly. ASL function: Speed signals are received from the combination meter assembly and used for the ASL. The ASL function automatically adjusts the sound volume ...
