Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM1000000015DPU
Model Year Start: 2018 Model: Camry HV Prod Date Range: [07/2017 -           ]
Title: HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY): P0A1D94; Hybrid/EV Powertrain Control Module Unexpected Operation; 2018 - 2024 MY Camry HV [07/2017 -        ]

DTC

P0A1D94

Hybrid/EV Powertrain Control Module Unexpected Operation

DESCRIPTION

The battery ECU assembly monitors the hybrid vehicle control ECU assembly via CAN communication. If the battery ECU assembly detects that the hybrid vehicle control ECU assembly is malfunctioning, it will illuminate the MIL and store a DTC.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P0A1D94

Hybrid/EV Powertrain Control Module Unexpected Operation

Hybrid vehicle control ECU assembly internal malfunction:

An abnormal signal from the hybrid vehicle control ECU assembly is detected by the battery ECU assembly.

(1 trip detection logic)

Hybrid vehicle control ECU assembly

Comes on

Master Warning Light:

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

P0A1D (INF P0A1D94): Hybrid powertrain control module

Required sensors/components

Hybrid vehicle control ECU assembly

Frequency of operation

Continuous

Duration

TMC's intellectual property

MIL operation

Immediately

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

DTC P0A1D (INF P0A1D94) 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 2018 - 2024 MY Camry HV [07/2017 -        ]; HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY): UTILITY

  • When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

    Click here 2018 - 2024 MY Camry HV [07/2017 -        ]; HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY): DTC CHECK / CLEAR

  1. Connect the Techstream to the DLC3.
  2. Turn the power switch on (IG) and turn the Techstream on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  4. Turn the power switch off and wait for 2 minutes or more.
  5. Turn the power switch on (IG) and turn the Techstream on.
  6. 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.

  7. Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
  8. 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 or N/A, perform the normal judgment procedure again.

CAUTION / NOTICE / HINT

CAUTION:

  • Before the following operations are conducted, take precautions to prevent electric shock by turning the power switch off, wearing insulated gloves, and removing the service plug grip from HV battery.
    • Inspecting the high-voltage system
    • Disconnecting the low voltage connector of the inverter with converter assembly
    • Disconnecting the low voltage connector of the HV battery
  • To prevent electric shock, make sure to remove the service plug grip to cut off the high voltage circuit before servicing the vehicle.
  • After removing the service plug grip from the HV battery, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
  • After removing the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.

    *a

    Without waiting for 10 minutes

    Click here 2018 - 2020 MY Camry HV [07/2017 - 10/2020]; HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY): PRECAUTION 2021 - 2024 MY Camry HV [10/2020 -        ]; HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY): PRECAUTION

    HINT:

    Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

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 2018 - 2019 MY Camry HV [07/2017 - 09/2019]; INTRODUCTION: REPAIR INSTRUCTION: PRECAUTION 2020 - 2024 MY Camry HV [09/2019 -        ]; INTRODUCTION: REPAIR INSTRUCTION: PRECAUTION

PROCEDURE

1.

CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU ASSEMBLY)

(a) Check the connections of the hybrid vehicle control ECU assembly connector.

Click here 2018 - 2024 MY Camry HV [07/2017 -        ]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: ELECTRONIC CIRCUIT INSPECTION PROCEDURE

OK:

The connectors are connected securely and there are no contact problems.

NG

CONNECT SECURELY

OK

2.

CHECK CONNECTOR CONNECTION CONDITION (BATTERY ECU ASSEMBLY)

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 hose.

Click here 2018 - 2020 MY Camry HV [07/2017 - 10/2020]; HYBRID / BATTERY CONTROL: BATTERY ECU (for LITHIUM-ION BATTERY): REMOVAL+ 2021 - 2024 MY Camry HV [10/2020 -        ]; HYBRID / BATTERY CONTROL: BATTERY ECU (for LITHIUM-ION BATTERY): REMOVAL+

(c) Check the connector connections and contact pressure of the relevant terminals for the battery ECU assembly.

Click here 2018 - 2024 MY Camry HV [07/2017 -        ]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: ELECTRONIC CIRCUIT INSPECTION PROCEDURE

OK:

The connector is connected securely and there are no contact problems.

(d) Install the No. 1 HV battery hose.

NG

CONNECT SECURELY

OK

3.

CHECK CONNECTOR CONNECTION CONDITION (NO. 1 HYBRID BATTERY PACK WIRE))

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 2018 - 2020 MY Camry HV [07/2017 - 10/2020]; HYBRID / BATTERY CONTROL: HV BATTERY (for LITHIUM-ION BATTERY): REMOVAL+ 2021 - 2024 MY Camry HV [10/2020 -        ]; HYBRID / BATTERY CONTROL: HV BATTERY (for LITHIUM-ION BATTERY): REMOVAL+

(c) Check the connector connections and contact pressure of the relevant terminals for the HV battery connector.

Click here 2018 - 2024 MY Camry HV [07/2017 -        ]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: ELECTRONIC CIRCUIT INSPECTION PROCEDURE

OK:

The connector is connected securely and there are no contact problems.

(d) Install the No. 4 HV battery protector.

NG

CONNECT SECURELY

OK

4.

REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY

Click here 2018 - 2020 MY Camry HV [07/2017 - 10/2020]; HYBRID / BATTERY CONTROL: HYBRID VEHICLE CONTROL ECU: REMOVAL 2021 - 2024 MY Camry HV [10/2020 -        ]; HYBRID / BATTERY CONTROL: HYBRID VEHICLE CONTROL ECU: REMOVAL

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