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 > Sfi System: Readiness Monitor Drive Pattern
READINESS MONITOR DRIVE PATTERN 1. PURPOSE OF READINESS TESTS The On-Board Diagnostic (OBD II) system is designed to monitor the performance of emission related components, and indicate any detected abnormalities with DTCs (Diagnostic Trouble Codes). Since various components need to be monitored dur ...
