Toyota Tundra Service Manual: Inspection

INSPECTION

PROCEDURE

1. INSPECT VSC OFF SWITCH

(a) Measure the resistance according to the value(s) in the table below.

Standard resistance:

Tester Connection	Switch Condition	Specified Condition
6 - 9	Pressed	Below 1 Ω
6 - 9	Not pressed	10 kΩ or higher

If the result is not as specified, replace the VSC OFF switch.

Toyota Tundra Service Manual > Sfi System: Catalyst System Efficiency Below Threshold (Bank 1) (P0420,P0430)
MONITOR DESCRIPTION The ECM uses sensors mounted in front of and behind the Three-Way Catalytic Converter (TWC) to monitor its efficiency. The first sensor, the Air-Fuel Ratio (A/F) sensor, sends pre-catalyst information to the ECM. The second sensor, the Heated Oxygen (HO2) sensor, sends post-catal ...

Toyota Tundra Owners Manual