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. Under normal conditions, the unlock warning switch assembly is on when the ignition switch is ON.
DTC Code |
DTC Detection Condition |
Trouble Area |
---|---|---|
B2780 |
The unlock warning switch assembly is not detected as being on when the ignition switch is ON. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
When the transponder key ECU assembly is replaced, refer to Registration (See
page ).
PROCEDURE
1. |
CLEAR DTC |
(a) Clear the DTCs (See page ).
|
2. |
CHECK FOR DTC |
(a) Check for DTCs (See page ).
OK:
DTC B2780 is not output.
OK | ![]() |
USE SIMULATION METHOD TO CHECK |
|
3. |
INSPECT UNLOCK WARNING SWITCH ASSEMBLY |
(a) Remove the unlock warning switch assembly (See page
|
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
1 - 2 |
Pushed |
Below 1 Ω |
Not pushed |
10 kΩ or higher |
NG | ![]() |
REPLACE UNLOCK WARNING SWITCH ASSEMBLY |
|
4. |
CHECK HARNESS AND CONNECTOR (UNLOCK WARNING SWITCH - TRANSPONDER KEY ECU AND BODY GROUND) |
(a) Disconnect the F18 switch connector.
(b) Disconnect the F34 ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F34-3 (KSW) - F18-1 |
Always |
Below 1 Ω |
F34-3 (KSW) or F18-1 - Body ground |
Always |
10 kΩ or higher |
F18-2 - Body ground |
Always |
Below 1 Ω |
OK | ![]() |
REPLACE TRANSPONDER KEY ECU ASSEMBLY |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
HINT:
If a trouble code is output during the DTC check, inspect the trouble areas listed
for that code. For details of the code, refer to the "See page" below.
Smart Key System (for Start Function)
DTC C ...
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
Use these procedures to troubleshoot the automatic running board system.
PROCEDURE
1.
VEHICLE BROUGHT TO WORKSHOP
NEXT
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