Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM10000000294YU |
Model Year Start: 2023 |
Model: GR Corolla |
Prod Date Range: [09/2022 -
] |
Title: THEFT DETERRENT / KEYLESS ENTRY: IMMOBILISER SYSTEM (w/o Smart Key System): B2780; Push Switch / Key Unlock Warning Switch Malfunction; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - ] |
DTC
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B2780
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Push Switch / Key Unlock Warning Switch Malfunction
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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.
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Detection Item
|
DTC Detection Condition
|
Trouble Area
|
Note
|
B2780
|
Push Switch / Key Unlock Warning Switch Malfunction
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The unlock warning switch assembly is not detected as being on when the ignition switch is ON (1 trip detection logic*).
|
-
Wire harness or connector
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Unlock warning switch assembly
-
Transponder key ECU assembly
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DTC Output Confirmation Operation:
-
Insert the door control transmitter assembly into the ignition key cylinder.
|
-
*: Only output while a malfunction is present.
Vehicle Condition and Fail-safe Operation when Malfunction Detected
Vehicle Condition when Malfunction Detected
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Fail-safe Operation when Malfunction Detected
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-
Hybrid control system cannot be started*1
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Engine cannot be started*2
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-
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-
*1: for HV Model
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*2: for Gasoline Model
Related Data List and Active Test
DTC No.
|
Data List and Active Test
|
B2780
|
Key SW
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
If the transponder key ECU assembly is replaced, refer to Registration.
Click here
-
After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".
PROCEDURE
1.
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INSPECT UNLOCK WARNING SWITCH ASSEMBLY
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(a) Remove the unlock warning switch assembly.
Click here
(b) Inspect the unlock warning switch assembly.
Click here
OK
|
|
|
2.
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CHECK HARNESS AND CONNECTOR (UNLOCK WARNING SWITCH ASSEMBLY - TRANSPONDER KEY ECU ASSEMBLY - BODY GROUND)
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(a) Disconnect the I67 transponder key ECU assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
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Condition
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Specified Condition
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I13-1 (UN+) - I67-5 (KSW)
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Always
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Below 1 Ω
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I13-2 (UN-) - Body ground
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Always
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Below 1 Ω
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I13-1 (UN+) or I67-5 (KSW) - Other terminals and body ground
|
Always
|
10 kΩ or higher
|
NG |
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REPAIR OR REPLACE HARNESS OR CONNECTOR
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|