| Last Modified: 05-08-2025 | 6.11:8.1.0 | Doc ID: RM100000001OBDO |
| Model Year Start: 2020 | Model: RAV4 HV | Prod Date Range: [06/2020 - ] |
| Title: HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY): P0A1F94; Hybrid/EV Battery Energy Control Module Unexpected Operation; 2020 - 2025 MY RAV4 HV [06/2020 - ] | ||
|
DTC |
P0A1F94 |
Hybrid/EV Battery Energy Control Module Unexpected Operation |
DTC SUMMARY
MALFUNCTION DESCRIPTION
The hybrid vehicle control ECU assembly (main CPU) monitors the battery ECU assembly.
The cause of this malfunction may be the following:
Battery ECU assembly internal malfunction
- Battery ECU assembly malfunction
DESCRIPTION
The hybrid vehicle control ECU assembly (main CPU) monitors the battery ECU assembly and stores this DTC when it detects a malfunction.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
Warning Indicate |
|---|---|---|---|---|---|
|
P0A1F94 |
Hybrid/EV Battery Energy Control Module Unexpected Operation |
The battery ECU assembly value received by the hybrid vehicle control ECU assembly (main CPU) exceeds the threshold for a certain period of time. (1 trip detection logic) |
Battery ECU assembly |
Comes on |
Master Warning: Comes on |
MONITOR DESCRIPTION
The battery ECU assembly monitors the hybrid vehicle control ECU assembly via CAN communication. If the battery ECU assembly detects a malfunction in the hybrid vehicle control ECU assembly, it will illuminate the MIL and store a DTC.
MONITOR STRATEGY
|
Related DTCs |
P0A1F (INF P0A1F94): Battery Energy Control Module |
|
Required sensors/components |
Battery ECU assembly |
|
Frequency of operation |
Continuous |
|
Duration |
TMC's intellectual property |
|
MIL operation |
1 driving cycle |
|
Sequence of operation |
None |
TYPICAL ENABLING CONDITIONS
|
The monitor will run whenever the following DTCs are not stored |
TMC's intellectual property |
|
Other conditions belong to TMC's intellectual property |
- |
TYPICAL MALFUNCTION THRESHOLDS
|
TMC's intellectual property |
- |
COMPONENT OPERATING RANGE
|
Hybrid vehicle control ECU assembly |
P0A1F (INF P0A1F94) 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
![2020 - 2025 MY RAV4 HV [06/2020 - ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY): UTILITY](/t3Portal/stylegraphics/info.gif)
-
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here
- Connect the Techstream to the DLC3.
- Turn the ignition switch to ON and turn the Techstream 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 Techstream on.
-
Turn the ignition switch to ON (READY) and wait for 10 seconds 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 / Hybrid Control / 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
|
1. |
CHECK DTC OUTPUT (HYBRID CONTROL, HV BATTERY) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Enter the following menus: Powertrain / Hybrid Control and HV Battery / Trouble Codes.
(d) Check for DTCs.
Powertrain > Hybrid Control > Trouble Codes
Powertrain > HV Battery > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
"P0A1F94" only is output, or DTCs except the ones in the table below are also output. |
A |
|
Simultaneous output of DTCs of hybrid control systems other than P0A1F94. |
B |
|
Any of the following DTCs are also output. |
C |
|
System |
Relevant DTC |
|
|---|---|---|
|
Hybrid battery system |
P1A001C |
Hybrid Battery Stack 2 Cell Voltage Detection Voltage Out of Range |
|
P301A1C |
Hybrid Battery Stack 1 Cell Voltage Detection Voltage Out of Range |
|
(e) Turn the ignition switch off.
| A |
|
REPLACE BATTERY ECU ASSEMBLY
|
| B |
|
GO TO DTC CHART (HYBRID CONTROL SYSTEM)
|
|
|
2. |
CHECK DTC |
(a) Check the DTCs that were output when the vehicle was brought to the workshop.
|
Result |
Proceed to |
|---|---|
|
"P1A001C" is also output. |
A |
|
"P301A1C" is also output. |
B |
| B |
|
|
|
3. |
CHECK CONNECTOR CONNECTION CONDITION (BATTERY ECU ASSEMBLY CONNECTOR) |
CAUTION:
Be sure to wear insulated gloves and protective goggles.
(a) Check that the service plug grip is not installed.
NOTICE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.
(b) Remove the No. 1 HV battery hose.
Click here
|
(c) Check the connections of the z27 battery ECU assembly connector. Click here
OK: The connector is connected securely and there are no contact problems. |
|
(d) Install the No. 1 HV battery hose.
|
Result |
Proceed to |
|
|---|---|---|
|
OK |
A |
|
|
Not connected securely |
The terminals are not damaged or corroded |
B |
|
Not connected securely |
The terminals are damaged or corroded |
C |
| B |
|
CONNECT SECURELY |
| C |
|
REPLACE NO. 2 HV SUPPLY STACK SUB-ASSEMBLY
|
|
|
4. |
CHECK FREEZE FRAME DATA |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Enter the following menus: Powertrain / HV battery / Trouble Codes.
(d) Read the value of freeze frame data items "Hybrid/EV battery cell 36 voltage" through "Hybrid/EV battery cell 70 voltage" for DTC P1A001C and make a note if the value of any is 1.6 V or less.
Powertrain > HV Battery > Trouble Codes
(e) Turn the ignition switch off.
|
|
5. |
CHECK NO. 2 HV SUPPLY STACK SUB-ASSEMBLY (HYBRID BATTERY CELL VOLTAGE) |
Click here
|
Result |
Proceed to |
|---|---|
|
The voltage between the terminals is 1.6 V or less. |
A |
|
Other than above |
B |
| A |
|
REPLACE NO. 2 HV SUPPLY STACK SUB-ASSEMBLY
|
| B |
|
REPLACE BATTERY ECU ASSEMBLY
|
|
6. |
CHECK CONNECTOR CONNECTION CONDITION (BATTERY ECU ASSEMBLY CONNECTOR) |
CAUTION:
Be sure to wear insulated gloves and protective goggles.
(a) Check that the service plug grip is not installed.
NOTICE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.
(b) Remove the No. 1 HV battery hose.
Click here
|
(c) Check the connections of the z29 battery ECU assembly connector. Click here
OK: The connector is connected securely and there are no contact problems. Result:
|
|
|||||||||||||
(d) Install the No. 1 HV battery hose.
| B |
|
CONNECT SECURELY |
| C |
|
REPLACE NO. 1 HV SUPPLY STACK SUB-ASSEMBLY
|
|
|
7. |
CHECK FREEZE FRAME DATA |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Enter the following menus: Powertrain / HV battery / Trouble Codes.
(d) Read the value of freeze frame data items "Hybrid/EV battery cell 1 voltage" through "Hybrid/EV battery cell 35 voltage" for DTC P301A1C and make a note if the value of any is 1.6 V or less.
Powertrain > HV Battery > Trouble Codes
(e) Turn the ignition switch off.
|
|
8. |
CHECK NO. 1 HV SUPPLY STACK SUB-ASSEMBLY (HYBRID BATTERY CELL VOLTAGE) |
Click here
|
Result |
Proceed to |
|---|---|
|
The voltage between the terminals is 1.6 V or less. |
A |
|
Other than above |
B |
| A |
|
REPLACE NO. 1 HV SUPPLY STACK SUB-ASSEMBLY
|
| B |
|
REPLACE BATTERY ECU ASSEMBLY
|
|
|