DESCRIPTION The IG circuit is the power source for the tire pressure warning ECU and receiver. WIRING DIAGRAM ![]() CAUTION / NOTICE / HINT NOTICE:
HINT: Inspect the fuses for circuits related to this system before performing the following inspection procedure. PROCEDURE
(b) Measure the voltage according to the value(s) in the table below. Standard Voltage:
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
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Toyota Tundra Service Manual > Navigation System: AV Signal Stoppage (Low Battery Voltage) (B158F)
DESCRIPTION This DTC is stored when a video or audio signal is interrupted due to battery voltage input to the navigation receiver assembly dropping temporarily. DTC Code DTC Detection Condition Trouble Area B158F A video or audio signal is interrupted when the battery voltage drops. Navigation rece ...