Toyota Tundra Service Manual: Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART

HINT:

If a trouble code is displayed during the DTC check, inspect the trouble areas listed for that code. For details of the code, refer to the "See page" below.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.

LIN Communication System

DTC Code	Detection Item	See page
B1206	P/W Master Switch Communication Stop
B1273	Sliding Roof ECU Communication Stop
B2321	Driver Side Door ECU Communication Stop
B2322	Front Passenger Side Door ECU Communication Stop
B2325	LIN Communication Bus Malfunction

Toyota Tundra Service Manual > Engine Immobiliser System (w/o Smart Key System): Push Switch / Key Unlock Warning Switch Malfunction (B2780)
DESCRIPTION This DTC is stored if the transponder key ECU assembly does not detect that the unlock warning switch assembly is on even when the ignition switch is ON. DTC No. Detection Item DTC Detection Condition Trouble Area Note B2780 Push Switch / Key Unlock Warning Switch Malfunction The unlock ...

Toyota Tundra Owners Manual