Toyota Corolla Cross: Lost Communication with Hybrid/EV Powertrain Control Module Missing Message (U029387)
DESCRIPTION
The battery ECU assembly transmits and receives signals via CAN communication to and from the hybrid vehicle control ECU.
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DTC No. | Detection Item |
DTC Detection Condition |
Trouble Area | MIL |
Warning Indicate | Note |
|---|---|---|---|---|---|---|
|
U029387 | Lost Communication with Hybrid/EV Powertrain Control Module Missing Message |
A CAN communication error between the battery ECU assembly and hybrid vehicle control ECU (CAN communication system malfunction) occurs (1 trip detection logic) |
CAN communication system |
Comes on | Master Warning: Comes on | SAE Code: U0293 |
MONITOR DESCRIPTION
If the battery ECU assembly cannot communicate with the hybrid vehicle control ECU via CAN communication, it will illuminate the MIL and store a DTC.
MONITOR STRATEGY
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Related DTCs | U0293 (INF U029387): Lost communication with Hybrid control module |
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Required sensors/components | Battery ECU assembly |
|
Frequency of operation | Continuous |
|
Duration | TMC's intellectual property |
|
MIL operation | Immediately |
|
Sequence of operation | None |
TYPICAL ENABLING CONDITIONS
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The monitor will run whenever the following DTCs are not stored |
TMC's intellectual property |
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Other conditions belong to TMC's intellectual property |
- |
TYPICAL MALFUNCTION THRESHOLDS
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TMC's intellectual property | - |
COMPONENT OPERATING RANGE
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Battery ECU assembly | DTC U0293 (INF U029387) is not detected |
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
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- When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here
- Connect the GTS to the DLC3.
- Turn the ignition switch to ON and turn the GTS on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the ignition switch off and wait for 2 minutes or more.
- Turn the ignition switch to ON and turn the GTS on.
- With ignition switch ON and wait for 2 minutes or more.[*1]
HINT:
[*1]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
- Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
- Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform the normal judgment procedure again.
PROCEDURE
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1. | CHECK DTC OUTPUT (HV BATTERY) |
(a) Check for DTCs.
Powertrain > HV Battery > Trouble Codes(b) Turn the ignition switch off.
| NEXT | .gif) | GO TO CAN COMMUNICATION SYSTEM |
