Toyota Corolla Cross: ID-BOX Missing Message (B278987)
DESCRIPTION
This DTC is stored when LIN communication between the certification ECU (smart key ECU assembly) and ID code box (immobiliser code ECU) stops for 10 seconds or more.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
|
B278987 |
ID-BOX Missing Message |
No communication between certification ECU (smart key ECU assembly) and ID code box (immobiliser code ECU) for 10 seconds or more. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- Inspect the fuses for circuits related to this system before performing the following procedure.
- 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 / 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.
- If the certification ECU (smart key ECU assembly) or ID code box (immobiliser
code ECU) is replaced, refer to Registration.
- for HEV Model: Click here
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- for Gasoline Model: Click here
- for HEV Model: Click here
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ID CODE BOX (IMMOBILISER CODE ECU)) |
(a) Disconnect the I222 certification ECU (smart key ECU assembly) connector.
(b) Disconnect the I20 ID code box (immobiliser code ECU) connector.
(c) Measure the resistance according to the value(s) in the table below.
NOTICE:
Make sure that each ECU is in sleep mode before performing the inspection. To enter sleep mode, turn the ignition switch from ON to off and wait for 180 seconds or more without operating any switches.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
I222-8 (LIN) - I20-2 (LIN1) |
Ignition switch off |
Below 1 Ω |
|
I222-8 (LIN) - Body ground |
Always |
10 kΩ or higher |
|
I20-2 (LIN1) - Body ground |
Always |
10 kΩ or higher |
| NG | .gif) |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
.gif)
|
2. |
CHECK HARNESS AND CONNECTOR (ID CODE BOX (IMMOBILISER CODE ECU) - AUXILIARY BATTERY AND BODY GROUND) |
(a) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
I20-1 (+B) -I20-5 (GND) |
Ignition switch off |
11 to 14 V |
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I20-5 (GND) - Body ground |
Always |
Below 1 Ω |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
3. |
REPLACE ID CODE BOX (IMMOBILISER CODE ECU) |
(a) Replace the ID code box (immobiliser code ECU).
HINT:
Click here
|
|
4. |
REGISTER ECU CODE REGISTRATION |
(a) Register the recognition codes in the ECUs.
- for HEV Model: Click here
- for Gasoline Model:: Click here
|
|
5. |
CLEAR DTC |
(a) Clear the DTCs.
Body Electrical > Smart Key > Clear DTCs
|
|
6. |
CHECK FOR DTC |
(a) Check for DTCs.
Body Electrical > Smart Key > Trouble Codes|
Result |
Proceed to |
|---|---|
|
B278987 is not output |
A |
|
B278987 is output |
B |
| A | |
END (ID CODE BOX (IMMOBILISER CODE ECU) WAS DEFECTIVE) |
| B | |
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
READ NEXT:
Power Source Control System Missing Message (B278C87)
DESCRIPTION
When an internal malfunction is detected in the certification ECU (smart key
ECU assembly), this DTC is stored.
DTC No.
Detection Item
DTC Detection Co
Removal
REMOVAL
CAUTION / NOTICE / HINT
COMPONENTS (REMOVAL)
Procedure
Part Name Code
1
PRECAUTION
-
SEE MORE:
Hybrid/EV Battery Negative Contactor Actuator Stuck Closed (P0AA373)
DTC SUMMARY MALFUNCTION DESCRIPTION The hybrid vehicle control ECU detects a stuck closed malfunction of a system main relay on the HV battery negative side.
The cause of this malfunction may be one of the following: Inverter voltage sensor (VH) internal circuit malfunction
Voltage sensor
Precaution
PRECAUTION
PRECAUTION WHEN REPLACING CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)
(a) When the central gateway ECU (network gateway ECU) is replaced, update the
ECU security key.
Click here
PRECAUTIONS FOR DISCONNECTING CABLE FROM NEGATIVE (-) BATTERY TERMINAL
NOTICE:
After the ignition sw
