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 key is in the ignition key cylinder. Under normal conditions, the unlock warning switch assembly is ON when the key is in the ignition key cylinder.
DTC No. |
DTC Detection Condition |
Trouble Area |
DTC Output Confirmation Operation |
---|---|---|---|
B2780 |
The unlock warning switch assembly is not detected as being on when the ignition switch is ON (1 trip detection logic*). |
|
Insert the door control transmitter assembly into the ignition key cylinder. |
Vehicle Condition when Malfunction Detected |
Fail-safe Operation when Malfunction Detected |
---|---|
Engine cannot be started |
- |
DTC No. |
Data List and Active Test |
---|---|
B2780 |
Key SW |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
PROCEDURE
1. |
CLEAR DTC |
(a) Clear the DTCs (See page ).
|
2. |
CHECK FOR DTC |
(a) Perform "DTC Output Confirmation Operation" procedure.
(b) Check for DTCs (See page ).
OK:
DTC B2780 is not output.
Result
Result |
Proceed to |
---|---|
DTC B2780 is output |
A |
DTC B2780 is not output |
B |
B |
USE SIMULATION METHOD TO CHECK |
|
3. |
INSPECT UNLOCK WARNING SWITCH ASSEMBLY |
(a) Remove the unlock warning switch assembly (See page ).
(b) Inspect the unlock warning switch assembly (See page ).
NG |
REPLACE UNLOCK WARNING SWITCH ASSEMBLY |
|
4. |
CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU ASSEMBLY - UNLOCK WARNING SWITCH ASSEMBLY - BODY GROUND) |
(a) Disconnect the T10 transponder key ECU assembly connector.
(b) Disconnect the U1 unlock warning switch assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
T10-3 (KSW) - U1-1 |
Always |
Below 1 Ω |
T10-3 (KSW) or U1-1 - Body ground |
Always |
10 kΩ or higher |
U1-2 - Body ground |
Always |
Below 1 Ω |
OK |
REPLACE TRANSPONDER KEY ECU ASSEMBLY |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Customizable features
Your vehicle includes a variety of electronic features that can be personalized
to your preferences. Programming these preferences requires specialized equipment
and may be performed by an authorized Toyota dealership.
Some function settings are changed simultaneously with other functions being ...
Components
COMPONENTS
ILLUSTRATION
*A
for Double Cab
*B
for Access Cab
*1
AUTO HIGH BEAM SWITCH
*2
COWL SIDE TRIM BOARD LH
*3
FRONT DOOR SCUFF PLATE LH
*4
HOOD LOC ...
Precaution
PRECAUTION
1. EXPRESSIONS OF IGNITION SWITCH
The type of ignition switch used on this model differs depending on the specifications
of the vehicle. The expressions listed in the table below are used in this section.
Expression
Ignition Switch (Position)
Engine S ...