INSPECTION PROCEDURE 1. INSPECT SKID CONTROL BUZZER ASSEMBLY
(b) Disconnect the skid control buzzer connector. (c) Check the connector and terminals for deformation and corrosion. OK: No deformation or corrosion. (d) Connect a positive (+) lead from the battery to terminal 1, and a negative (-) lead to terminal 2 of the skid control buzzer, and check that the buzzer sounds. OK: The skid control buzzer assembly sounds. If the result is not as specified, replace the skid control buzzer assembly. |
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 ...