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 > Can Communication System: Check Bus 3 Line for Short to GND
DESCRIPTION There may be a short circuit between one of the CAN bus wires and +B when no resistance exists between terminal 6 (CA3H) of the central gateway ECU (network gateway ECU) and terminal 4 (CG) of the DLC3, or terminal 21 (CA3L) of the central gateway ECU (network gateway ECU) and terminal 4 ...
