| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM1000000026XCH |
| Model Year Start: 2023 | Model: Corolla | Prod Date Range: [09/2022 - ] |
| Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): B278E87; Immobiliser Amp Missing Message; 2023 - 2025 MY Corolla Corolla HV [09/2022 - ] | ||
|
DTC |
B278E87 |
Immobiliser Amp Missing Message |
DESCRIPTION
A transponder key amplifier is built into the certification ECU (smart key ECU assembly).
When a communication malfunction occurs with the transponder key amplifier inside the certification ECU (smart key ECU assembly), this DTC is stored.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
Note |
|---|---|---|---|---|
|
B278E87 |
Immobiliser Amp Missing Message |
A communication malfunction with the transponder key amplifier inside the certification ECU (smart key ECU assembly) is detected. (1-trip detection logic*). |
Certification ECU (smart key ECU assembly) |
DTC Output Confirmation Operation:
|
- *: Only detected while a malfunction is present and the ignition switch is ON.
Vehicle Condition and Fail-safe Function when Malfunction Detected
|
Vehicle Condition when Malfunction Detected |
Fail-safe Function when Malfunction Detected |
|---|---|
|
Hybrid control system cannot be started when transmitter battery is depleted by holding electrical key transmitter sub-assembly near power switch and pressing and holding power switch with shift position in P |
- |
Related Data List and Active Test Items
|
DTC No. |
Data List and Active Test |
|---|---|
|
B278E87 |
- |
CAUTION / NOTICE / HINT
NOTICE:
-
When using the GTS with the ignition switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins.
Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Start Key(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.
-
The smart key system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly.
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![2023 MY Corolla Corolla HV [09/2022 - 11/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): HOW TO PROCEED WITH TROUBLESHOOTING](/t3Portal/stylegraphics/info.gif)
-
Before replacing the certification ECU (smart key ECU assembly), refer to Registration.
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- After performing repairs, confirm that no DTCs are output again.
PROCEDURE
|
1. |
CLEAR DTC |
(a) Clear the DTCs.
Body Electrical > Smart Key > Clear DTCs
|
|
2. |
CHECK FOR DTC |
(a) Press the power switch with the electric key transmitter sub-assembly not in the cabin.
(b) Check for DTCs.
Body Electrical > Smart Key > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTC B278E87 is output |
A |
|
DTC B278E87 is not output |
B |
| A |
|
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
|
| B |
|
|
|