| Last Modified: 05-08-2025 | 6.11:8.1.0 | Doc ID: RM100000002FKQO |
| Model Year Start: 2024 | Model: RAV4 | Prod Date Range: [10/2023 - ] |
| Title: A25A-FKS (ENGINE CONTROL): SFI SYSTEM: U012087; Lost Communication with Starter / Generator Control Module Missing Message; 2024 - 2025 MY RAV4 [10/2023 - ] | ||
|
DTC |
U012087 |
Lost Communication with Starter / Generator Control Module Missing Message |
DESCRIPTION
The ECM and engine stop and start ECU send and receive signals via CAN communication.
If a communication error occurs between the ECM and engine stop and start ECU, the ECM stores this DTC.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
Note |
|---|---|---|---|---|---|
|
U012087 |
Lost Communication with Starter / Generator Control Module Missing Message |
There is no communication between the ECM and engine stop and start ECU (1 trip detection logic). |
|
Comes on |
|
MONITOR STRATEGY
|
Related DTCs |
U0120: Lost Communication with starter/generator control module |
|
Required Sensors/Components (Main) |
ECM |
|
Required Sensors/Components (Related) |
- |
|
Frequency of Operation |
Continuous |
|
Duration |
1.16 seconds |
|
MIL Operation |
Immediate |
|
Sequence of Operation |
None |
TYPICAL ENABLING CONDITIONS
|
Monitor runs whenever the following DTCs are not stored |
None |
|
All of the following conditions are met |
- |
|
Battery voltage |
10 V or higher |
|
Ignition switch |
ON |
|
Starter |
Off |
TYPICAL MALFUNCTION THRESHOLDS
|
Communication signal |
Lost communication with stop and start system control module |
CONFIRMATION DRIVING PATTERN
HINT:
-
After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
![2021 - 2025 MY RAV4 [08/2020 - ]; A25A-FKS (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR](/t3Portal/stylegraphics/info.gif)
-
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the ignition switch off and wait for at least 30 seconds.
- Turn the ignition switch to ON.
- Wait 5 seconds or more [A].
- Enter the following menus: Powertrain / Engine / Trouble Codes [B].
-
Read the pending DTCs.
HINT:
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
- Enter the following menus: Powertrain / Engine / Utility / All Readiness.
- Input the DTC: U012087.
-
Check the DTC judgment result.
HINT:
- If the judgment result is NORMAL, the system is normal.
- If the judgment result is ABNORMAL, the system has a malfunction.
- If the judgment result is INCOMPLETE, perform steps [A] through [B] again.
-
[A] to [B]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
- When clearing the permanent DTCs, do not disconnect the cable from the battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.
PROCEDURE
|
1. |
GO TO CAN COMMUNICATION SYSTEM |
(a) Refer to the CAN Communication System.
Click here
| NEXT |
|
END |
|
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