INSPECTION PROCEDURE 1. INSPECT UNLOCK WARNING SWITCH ASSEMBLY 
(a) Measure the resistance according to the value(s) in the table below. Standard resistance:
If the result is not as specified, replace the unlock warning switch assembly. Text in Illustration
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Toyota Tundra Service Manual > Can Communication System: Check Bus 4 Line for Short to GND
DESCRIPTION There may be a short circuit between one of the CAN bus lines and GND when there is no resistance between terminal 22 (CA2H) of the central gateway ECU (network gateway ECU) and terminal 4 (CG) of the DLC3, or terminal 7 (CA2L) of the central gateway ECU (network gateway ECU) and termina ...
