Toyota Avalon (XX50): Motor Shutdown Stuck Off (P1C6A9F). Generator Shutdown Stuck Off (P1C6C9F). Hybrid/EV Battery Current Sensor for Driving Control Voltage Out of Range (P1C9F1C)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Engine / Hybrid / Battery Control / Hybrid Control System / Motor Shutdown Stuck Off (P1C6A9F). Generator Shutdown Stuck Off (P1C6C9F). Hybrid/EV Battery Current Sensor for Driving Control Voltage Out of Range (P1C9F1C)

Motor Shutdown Stuck Off (P1C6A9F)

DTC SUMMARY

MALFUNCTION DESCRIPTION

The hybrid vehicle control ECU detects malfunctions which prevent the motor (MG2) inverter shutdown circuit shutting down the hybrid vehicle control system. Detection is performed during the shutdown sequence when the power switch is turned off. If motor (MG2) inverter operation is detected after a shutdown signal was sent to the motor (MG2) inverter, the hybrid vehicle control ECU will determine that there is a malfunction and store this DTC.

The cause of this malfunction may be the following:

Inverter with converter assembly SDWN (MG2) internal circuit malfunction
  • Inverter with converter assembly malfunction

DESCRIPTION

The motor generator control ECU (MG ECU) sends shutdown signals to the inverter to cut the power supply to the generator (MG1) and motor (MG2). If the power switch is turned off, the motor generator control ECU (MG ECU) will send a GSDN (MG1 Shutdown Signal) signal and MSDN (MG2 shutdown signal) signal to check the function of the HV gate block. If a shutdown malfunction is detected, this DTC will be stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P1C6A9F

Motor Shutdown Stuck Off

When the HV gate block function check is performed (when the power switch is turned from on (READY) to off), the MSDN (MG2 shutdown) signal is sent but the motor (MG2) inverter current and voltage (VH) do not decrease.

(1 trip detection logic)

Inverter with converter assembly

Does not come on

Master Warning Light:

Comes on
Related Data List

DTC No.

Data List

P1C6A9F
  • Ready Signal
  • VH-Voltage after Boosting

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

  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 (READY) and wait for 30 seconds or more.
  6. Turn the power switch off and wait for 2 minutes or more.
  7. Turn the power switch on (IG) and turn the Techstream on.
  8. Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.
  9. 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 driving pattern again.

PROCEDURE

1.

REPLACE INVERTER WITH CONVERTER ASSEMBLY

Click here

NEXT

END

Generator Shutdown Stuck Off (P1C6C9F)

DTC SUMMARY

MALFUNCTION DESCRIPTION

The hybrid vehicle control ECU detects malfunctions which prevent the generator (MG1) inverter shutdown circuit from shutting down the hybrid vehicle control system. Detection is performed during the shutdown sequence when the power switch is turned off. If generator (MG1) inverter operation is detected after a shutdown signal was sent to the generator (MG1) inverter, the hybrid vehicle control ECU will determine that there is a malfunction and store this DTC.

The cause of this malfunction may be the following:

Inverter with converter assembly SDWN (MG1) internal circuit malfunction
  • Inverter with converter assembly malfunction

DESCRIPTION

Refer to the description for DTC P1C6A9F.

Click here

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P1C6C9F

Generator Shutdown Stuck Off

When the HV gate block function check is performed (when the power switch is turned from on (READY) to off), the GSDN (MG1 shutdown) signal is sent but the generator (MG1) inverter current and voltage (VH) do not decrease.

(1 trip detection logic)

Inverter with converter assembly

Does not come on

Master Warning Light:

Comes on
Related Data List

DTC No.

Data List

P1C6C9F
  • Ready Signal
  • VH-Voltage after Boosting

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

  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 (READY) and wait for 30 seconds or more.
  6. Turn the power switch off and wait for 2 minutes or more.
  7. Turn the power switch on (IG) and turn the Techstream on.
  8. Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.
  9. 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 driving pattern again.

PROCEDURE

1.

REPLACE INVERTER WITH CONVERTER ASSEMBLY

Click here

NEXT

END

Hybrid/EV Battery Current Sensor for Driving Control Voltage Out of Range (P1C9F1C)

DESCRIPTION

Refer to the description for DTC P0ABF11.

Click here

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P1C9F1C

Hybrid/EV Battery Current Sensor for Driving Control Voltage Out of Range

The difference between IBA and IB0 exceeds the threshold.

(1 trip detection logic)

Battery voltage sensor

Comes on

Master Warning Light:

Comes on

IB0 is used for battery control and IBA is used for driving control. Although IB0 and IBA receive voltage output by the battery current sensor through the same terminal, their output may differ as they are connected through separate filter circuits within the battery voltage sensor.

Related Data List

DTC No.

Data List

P1C9F1C
  • Hybrid Battery Current for Hybrid Battery Control
  • Hybrid Battery Current for Driving Control

MONITOR DESCRIPTION

If the battery voltage sensor detects a malfunction in the battery voltage sensor circuit, the hybrid vehicle control ECU will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs

P1CA0 (INF P1C9F1C): Current sensor malfunction

Required sensors/components

Battery voltage sensor

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

Battery voltage sensor

DTC P1CA0 (INF P1C9F1C) 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

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

    Click here

  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 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.

  7. Enter the following menus: Powertrain / Hybrid Control / 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.

PROCEDURE

1.

CHECK DTC OUTPUT (HYBRID CONTROL)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

(d) Check and record any HV system DTCs and freeze frame data.

Powertrain > Hybrid Control > Trouble Codes

Result

Proceed to

P0AFC00, P0AFC96, P308A12, P1CBB12, P1CBB14, P0ABF15, P0ABF28 or P0ABF2A is not output.

A

P0AFC00, P0AFC96, P308A12, P1CBB12, P1CBB14, P0ABF15, P0ABF28 or P0ABF2A is output.

B

(e) Turn the power switch off.

A

REPLACE BATTERY VOLTAGE SENSOR

B

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

Hybrid/EV Battery "A" Voltage Sensor/Boosting Converter Voltage Sensor "A" Signal Compare Failure (P1C2D62)

Hybrid/EV Battery Current Sensor for Driving Control Circuit Short to Ground (P1C9F11,P1C9F15). Engine Failed to Start Mechanical Linkage Failure (P1C7779). High Voltage Power Resource Circuit Consump

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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual

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