Toyota Corolla Cross: Immobiliser Amp Missing Message (B278E87)
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 when Malfunction Detected |
Fail-safe Function when Malfunction Detected |
|---|---|
|
engine cannot be started when transmitter battery is depleted by holding electrical key transmitter sub-assembly near engine switch and pressing and holding engine switch with shift lever in P |
Prohibits the engine from being started (the engine does not start). |
|
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 the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Key. 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.
Click here
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- Before replacing the certification ECU (smart key ECU assembly), refer to Registration.
Click here
- After performing repairs, confirm that no DTCs are output again.
PROCEDURE
|
1. | CLEAR DTC |
(a) Clear the DTCs.
Body Electrical > Smart Key > Clear DTCs
|
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| 2. |
CHECK FOR DTC |
(a) Press the engine 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 |
.gif) | REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
| B |
| USE SIMULATION METHOD TO CHECK |
READ NEXT:
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DESCRIPTION When an internal malfunction occurs in the ID code box (immobiliser code ECU), the certification ECU (smart key ECU assembly) stores this DTC.
DTC No. Detection Item
DTC Detec
Engine Immobiliser System Signal (Some Circuit Quantity, Reported via Serial Data) Invalid (B279986)
DESCRIPTION If there is a communication malfunction between the ECM and ID code box (immobiliser code ECU), or when the communication ID codes do not match, the ECM stores this DTC.
DTC No. De
Engine Immobiliser System Circuit Short to Battery (B279A12)
DESCRIPTION If the communication line (IMI - EFIO) between the ECM and ID code box (immobiliser code ECU) is stuck high, the ECM will store this DTC.
DTC No. Detection Item
DTC Detection
SEE MORE:
Terminals Of Ecu
TERMINALS OF ECU
CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY
HINT:
Check from the rear of the connector while it is connected to the air conditioning amplifier assembly.
Make sure to wait at least 2 minutes after turning the ignition switch off before performing an ECU terminal inspectio
Reassembly
REASSEMBLY CAUTION / NOTICE / HINT COMPONENTS (REASSEMBLY)
Procedure Part Name Code
1 SEAT TRACK REAR UPPER COVER
72125V -
- -
2 SEAT TRACK UPPER RAIL COVER
72266 -
- -
3 FRONT SEAT LOWER CUSHION SHIELD
