Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001GCOM
Model Year Start: 2020 Model: Corolla Prod Date Range: [01/2019 - 09/2022]
Title: HYBRID / BATTERY CONTROL: MOTOR GENERATOR CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): P0C5013,P0C501F,P0C5A13,P0C5A1F; Drive Motor "A" Position Sensor Circuit "A" Circuit Open; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]

DTC

P0C5013

Drive Motor "A" Position Sensor Circuit "A" Circuit Open

DTC

P0C501F

Drive Motor "A" Position Sensor Circuit "A" Circuit Intermittent

DTC

P0C5A13

Drive Motor "A" Position Sensor Circuit "B" Circuit Open

DTC

P0C5A1F

Drive Motor "A" Position Sensor Circuit "B" Circuit Intermittent

DTC SUMMARY

MALFUNCTION DESCRIPTION

These DTCs indicate that the resolver output signal is abnormal. The cause of this malfunction may be one of the following:

Area

Main Malfunction Description

Inverter low-voltage circuit

The connectors are not connected properly

Hybrid Vehicle Transaxle Assembly
  • Open circuit in the motor resolver circuit
  • Motor (MG2) internal malfunction (entry of foreign matter, etc.)

Wire harness between the resolver and inverter with converter assembly
  • Open circuit in the wire harness
  • The connectors are not connected properly

Inside of inverter

Inverter with converter assembly internal circuit malfunction

DESCRIPTION

Refer to the system description for the Motor Resolver Circuit.

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DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P0C5013

Drive Motor "A" Position Sensor Circuit "A" Circuit Open

Open in motor resolver sin phase circuit

(1 trip detection logic)
  • Inverter with converter assembly
  • Hybrid vehicle transaxle assembly
  • Wire harness or connector

Comes on

Master Warning:

Comes on

P0C501F

Drive Motor "A" Position Sensor Circuit "A" Circuit Intermittent

Open in motor resolver sin phase circuit detected when DTC P0C7917, P0D3319, P1C5D19 or P1C5F19 is stored.

(1 trip detection logic)
  • Inverter with converter assembly
  • Hybrid vehicle transaxle assembly
  • Wire harness or connector

Does not come on

Master Warning:

Does not come on

P0C5A13

Drive Motor "A" Position Sensor Circuit "B" Circuit Open

Open in motor resolver cos phase circuit

(1 trip detection logic)
  • Inverter with converter assembly
  • Hybrid vehicle transaxle assembly
  • Wire harness or connector

Comes on

Master Warning:

Comes on

P0C5A1F

Drive Motor "A" Position Sensor Circuit "B" Circuit Intermittent

Open in motor resolver cos phase circuit detected when DTC P0C7917, P0D3319, P1C5D19 or P1C5F19 is stored.

(1 trip detection logic)
  • Inverter with converter assembly
  • Hybrid vehicle transaxle assembly
  • Wire harness or connector

Does not come on

Master Warning:

Does not come on

HINT:

If either of these DTCs is output, an open in the sin or cos phase circuit is suspected.

MONITOR DESCRIPTION

The motor generator control ECU monitors the motor resolver output signal. If the motor generator control ECU detects output signals that are out of the normal range or specification, it will conclude that there is a malfunction in the motor resolver. If a malfunction is detected, the motor generator control ECU will illuminate the MIL and set a DTC.

MONITOR STRATEGY

Related DTCs

P0C50 (INF P0C5013): Circuit discontinuity

P0C5A (INF P0C5A13): Circuit discontinuity

Required sensors/components

Motor resolver

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

Motor generator control ECU

DTC P0C50 (INF P0C5013) is not detected

DTC P0C5A (INF P0C5A13) 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.

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

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  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 5 seconds or more. [*1]
  7. Turn the power switch on (READY) and wait for 5 seconds or more. [*2]
  8. Depress the accelerator pedal of the vehicle with the engine stopped and the shift lever in P to start the engine. [*3]
  9. Drive the vehicle forward with the shift lever in D for 5 m (16 ft.) or more. [*4]
  10. Drive the vehicle backward with the shift lever in R for 5 m (16 ft.) or more. [*5]

    HINT:

    [*1] to [*5]: Normal judgment procedure.

    The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

  11. Enter the following menus: Powertrain / Motor Generator / Utility / All Readiness.
  12. 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.

WIRING DIAGRAM

Refer to the wiring diagram for the Motor Resolver Circuit.

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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.

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    HINT:

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

    *a

    Without waiting for 10 minutes

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.

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HINT:

  • If the problem symptom cannot be reproduced, performing a road test on a road on which the vehicle tends to vibrate will make it easier to reproduce the symptom.
  • If the resolver is malfunctioning, the vehicle may not drive smoothly.
  • When inspecting the connectors, if it is difficult to judge if a connector was disconnected, deformed or improperly secured, disconnect and reconnect the connector and then check for DTCs again. Check if the same DTC is output. If the same DTC is not output, improper connection of connectors is suspected.
  • As a malfunction detection threshold may be exceeded when performing the vibration or heat connector inspections, make sure to perform the following inspection to check that the DTC was not stored due to the malfunction of a part.

PROCEDURE

1.

CHECK DTC OUTPUT

(a) Connect the Techstream to the DLC3.

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

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

(d) Check for DTCs.

Powertrain > Hybrid Control > Trouble Codes

Powertrain > Motor Generator > Trouble Codes

Result

Proceed to

P0C5013, P0C501F, P0C5A13 or P0C5A1F only is output, or DTCs except the ones in the table below are also output.

A

DTCs of hybrid control system in the tables below are output.

B

DTCs of motor generator control system in the tables below are output.

C

Table 1

Malfunction Content

System

Relevant DTC

Insulation Malfunction

Hybrid control system

P1C7C49

Hybrid/EV Battery Voltage System Isolation (A/C Area) Internal Electronic Failure

P1C7D49

Hybrid/EV Battery Voltage System Isolation (Hybrid/EV Battery Area) Internal Electronic Failure

P1C7E49

Hybrid/EV Battery Voltage System Isolation (Transaxle Area) Internal Electronic Failure

P1C7F49

Hybrid/EV Battery Voltage System Isolation (Direct Current Area) Internal Electronic Failure

Table 2

Malfunction Content

System

Relevant DTC

Microcomputer malfunction

Motor generator control system

P1C2B1C

Drive Motor "A" Control Module A/D Converter Circuit Voltage Out of Range

P1C2B49

Drive Motor "A" Control Module A/D Converter Circuit Internal Electronic Failure

Hybrid control system

P0A1B49

Drive Motor "A" Control Module Internal Electronic Failure

Power source circuit malfunction

Motor generator control system

P06B01C

Generator Control Module Position Sensor REF Power Source Circuit Voltage Out of Range

P06D61C

Generator Control Module Offset Power Circuit Voltage Out of Range

Communication malfunction

Motor generator control system

P312487

Lost Communication between Drive Motor "A" and HV ECU Missing Message

HINT:

  • P0C5013, P0C501F, P0C5A13 or P0C5A1F may be output as a result of the malfunction indicated by the DTCs above.
    1. The chart above is listed in inspection order of priority.
    2. Check DTCs that are output at the same time by following the listed order. (The main cause of the malfunction can be determined without performing unnecessary inspections.)

(e) Turn the power switch off.

B

GO TO DTC CHART (HYBRID CONTROL SYSTEM) 2020 MY Corolla Corolla HV [01/2019 - 04/2020]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): DIAGNOSTIC TROUBLE CODE CHART 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): DIAGNOSTIC TROUBLE CODE CHART

C

GO TO DTC CHART (MOTOR GENERATOR CONTROL SYSTEM)

A

2.

CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR)

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Result

Proceed to

OK

A

NG (The connector is not connected securely.)

B

NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.)

C
B

CONNECT SECURELY
C

REPAIR OR REPLACE HARNESS OR CONNECTOR
A

3.

CHECK MOTOR RESOLVER CIRCUIT

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HINT:

If the "Motor Resolver Circuit" inspection results are normal, perform the next step.

NEXT

REFER TO REPLACE INVERTER WITH CONVERTER ASSEMBLY PARTS