Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM100000001N34M |
Model Year Start: 2021 |
Model: Corolla |
Prod Date Range: [04/2020 - 09/2022] |
Title: HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY with P610): P0A1D94; Hybrid/EV Powertrain Control Module Unexpected Operation; 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022] |
DTC
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P0A1D94
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Hybrid/EV Powertrain Control Module Unexpected Operation
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DESCRIPTION
The battery ECU assembly monitors the hybrid vehicle control ECU via CAN communication. If the battery ECU assembly detects that the hybrid vehicle control ECU is malfunctioning, it will illuminate the MIL and store a DTC.
DTC No.
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Detection Item
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DTC Detection Condition
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Trouble Area
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MIL
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Warning Indicate
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P0A1D94
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Hybrid/EV Powertrain Control Module Unexpected Operation
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Hybrid vehicle control ECU internal malfunction:
An abnormal signal from the hybrid vehicle control ECU is detected by the battery ECU assembly.
(1 trip detection logic)
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Hybrid vehicle control ECU
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Comes on
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Master Warning:
Comes on
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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
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P0A1D (INF P0A1D94): Hybrid powertrain control module
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Required sensors/components
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Hybrid vehicle control ECU assembly
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Frequency of operation
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Continuous
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Duration
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TMC's intellectual property
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MIL operation
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Immediately
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Sequence of operation
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None
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TYPICAL ENABLING CONDITIONS
The monitor will run whenever the following DTCs are not stored
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TMC's intellectual property
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Other conditions belong to TMC's intellectual property
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-
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TYPICAL MALFUNCTION THRESHOLDS
TMC's intellectual property
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-
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COMPONENT OPERATING RANGE
Hybrid vehicle control ECU assembly
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DTC P0606 (INF P060694) is not detected
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CONFIRMATION DRIVING PATTERN
HINT:
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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
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Connect the Techstream to the DLC3.
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Turn the power switch on (IG) and turn the Techstream on.
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Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
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Turn the power switch off and wait for 2 minutes or more.
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Turn the power switch on (IG) and turn the Techstream on.
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With power switch on (IG) 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.
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Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
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Check the DTC judgment result.
HINT:
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If the judgment result shows NORMAL, the system is normal.
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If the judgment result shows ABNORMAL, the system has a malfunction.
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If the judgment result shows INCOMPLETE or N/A, perform the normal judgment procedure again.
CAUTION / NOTICE / HINT
NOTICE:
After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.
Click here
HINT:
As the battery cooling blower assembly speed is excessively low, there is a possibility of an open or short to ground in connected circuits, or motor locking.
PROCEDURE
1.
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CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR)
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(a) Check the connector connections and contact pressure of the relevant terminals for the hybrid vehicle control ECU.
Click here
OK:
The connectors are connected securely and there are no contact problems.
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NG |
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CONNECT SECURELY
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OK
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2.
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CHECK CONNECTOR CONNECTION CONDITION (BATTERY ECU ASSEMBLY CONNECTOR)
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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 power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.
(b) Remove the No. 1 HV battery protector.
Click here
(c) Check the connector connections and contact pressure of the relevant terminals for the battery ECU assembly.
Click here
OK:
The connector is connected securely and there are no contact problems.
|
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(d) Install the No. 1 HV battery protector.
NG |
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CONNECT SECURELY
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OK
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|
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3.
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CHECK CONNECTOR CONNECTION CONDITION (FLOOR WIRE CONNECTOR)
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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 power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.
(b) Remove the No. 4 HV battery protector.
Click here
(c) Check the connector connections and contact pressure of the relevant terminals for the HV battery.
Click here
OK:
The connector is connected securely and there are no contact problems.
|
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(d) Install the No. 4 HV battery protector.
NG |
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CONNECT SECURELY
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OK
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4.
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REPLACE HYBRID VEHICLE CONTROL ECU
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Click here
NEXT |
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END
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