Last Modified: 07-31-2024 6.11:8.1.0 Doc ID: RM100000001HSS9
Model Year Start: 2020 Model: Corolla Hatchback Prod Date Range: [03/2019 - 11/2022]
Title: K120 / K121 (CVT): K120 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: P158504; Acceleration Sensor Circuit System Internal Failure; 2020 - 2023 MY Corolla Corolla Hatchback [03/2019 - 11/2022]

DTC

P158504

Acceleration Sensor Circuit System Internal Failure

DESCRIPTION

The yaw rate and acceleration sensor is built into the airbag sensor assembly. The airbag sensor assembly sends yaw rate and acceleration sensor signals to the TCM via CAN communication. These signals are used for neutral control. If a yaw rate and acceleration sensor malfunction signal is received from the airbag sensor assembly, this DTC is stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P158504

Acceleration Sensor Circuit System Internal Failure

Yaw rate and acceleration sensor malfunction signal (abnormal yaw rate and acceleration sensor value) is received from the airbag sensor assembly for 3 seconds or more (1-trip detection logic).
  • Yaw rate and acceleration sensor (Airbag sensor assembly)
  • CAN communication system
  • Wire harness or connector
  • TCM

Does not come on

DTC stored

SAE Code:

P1585

CONFIRMATION DRIVING PATTERN

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.

HINT:

After repairs have been completed, clear the DTCs and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

  1. Connect the Techstream to the DLC3.
  2. Turn the engine 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 engine switch off and wait for 2 minutes or more.
  5. Turn the engine switch on (IG) and turn the Techstream on.
  6. Start the engine.
  7. Drive the vehicle while accelerating and decelerating repeatedly for several minutes.
  8. Stop the vehicle.
  9. Enter the following menus: Powertrain / Transmission / Utility / All Readiness.
  10. Input the DTC: P158504.
  11. Check the DTC judgment result.

    Techstream Display

    Description

    NORMAL
    • DTC judgment completed
    • System normal

    ABNORMAL
    • DTC judgment completed
    • System abnormal

    INCOMPLETE
    • DTC judgment not completed
    • Perform driving pattern after confirming DTC enabling conditions

    N/A
    • Unable to perform DTC judgment
    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    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 Confirmation Driving Pattern and check the DTC judgment result again.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Perform registration and/or initialization when parts related to the continuously variable transaxle system are replaced.

    Click here 2020 - 2022 MY Corolla Corolla Hatchback [01/2019 - 09/2022]; K120 / K121 (CVT): K120 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: PRECAUTION 2023 MY Corolla Corolla Hatchback [09/2022 - 11/2022]; K120 / K121 (CVT): K120 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: PRECAUTION

  • Check that no DTCs are stored after performing initialization.

    Click here 2019 - 2022 MY Corolla Corolla Hatchback [06/2018 - 09/2022]; K120 / K121 (CVT): K120 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: DTC CHECK / CLEAR 2023 MY Corolla Corolla Hatchback [09/2022 - 11/2022]; K120 / K121 (CVT): K120 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: DTC CHECK / CLEAR

  • Inspect the fuses for circuits related to this system before performing the following procedure.

HINT:

Read freeze frame data using the Techstream. The TCM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE

1.

CHECK DTC OUTPUT (IN ADDITION TO DTC P158504)

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Transmission / Trouble Codes.

Powertrain > Transmission > Trouble Codes

(e) Read the DTCs using the Techstream.

HINT:

  • If any CAN communication system DTCs are output, perform troubleshooting for the CAN communication system first.
  • If any DTCs other than P158504 are output, troubleshoot those DTCs first.

Result

Proceed to

Only DTC P158504 is output

A

DTC P158504 and other DTCs are output

B
B

GO TO DTC CHART 2020 - 2021 MY Corolla Corolla Hatchback [03/2019 - 06/2021]; K120 / K121 (CVT): K120 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: DIAGNOSTIC TROUBLE CODE CHART 2022 MY Corolla Corolla Hatchback [06/2021 - 09/2022]; K120 / K121 (CVT): K120 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: DIAGNOSTIC TROUBLE CODE CHART 2023 MY Corolla Corolla Hatchback [09/2022 - 11/2022]; K120 / K121 (CVT): K120 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: DIAGNOSTIC TROUBLE CODE CHART

A

2.

INSPECT AIRBAG SENSOR ASSEMBLY (CHECK SENSOR INSTALLATION)

(a) Check the airbag sensor assembly installation condition.

Click here 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: INSTALLATION 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: INSTALLATION

OK:

The airbag sensor assembly is not tilted and its installation bolts are tightened to the specified torque, the airbag sensor assembly bracket is not deformed and there are no foreign objects under the airbag sensor assembly.

NG

GO TO STEP 5

OK

3.

CHECK TERMINAL VOLTAGE (POWER SOURCE OF AIRBAG SENSOR ASSEMBLY)

(a) Disconnect the I47 airbag sensor assembly connector.

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

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

I47-36 (IG2) - Body ground

Engine switch on (IG)

11 to 14 V

(d) Turn the engine switch off.

(e) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

I47-33 (E1) - Body ground

Always

Below 1 Ω

I47-32 (E2) - Body ground

Always

Below 1 Ω

(f) Connect the I47 airbag sensor assembly connector.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (AIRBAG SENSOR ASSEMBLY POWER SOURCE CIRCUIT)
OK

4.

REPLACE AIRBAG SENSOR ASSEMBLY

(a) Replace the airbag sensor assembly.

Click here 2019 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 09/2022]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: COMPONENTS 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: COMPONENTS

NEXT

GO TO STEP 6

5.

REINSTALL OR REPLACE AIRBAG SENSOR ASSEMBLY

(a) Reinstall or replace the airbag sensor assembly.

Click here 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: INSTALLATION 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: INSTALLATION

NEXT

6.

PERFORM INITIALIZATION

(a) Perform Initialization.

Click here 2019 - 2022 MY Corolla Corolla Hatchback [06/2018 - 09/2022]; K120 / K121 (CVT): K120 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: INITIALIZATION 2023 MY Corolla Corolla Hatchback [09/2022 - 11/2022]; K120 / K121 (CVT): K120 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: INITIALIZATION

NEXT

7.

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED (DTC P158504)

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Clear the DTCs.

Powertrain > Transmission > Clear DTCs

(e) Turn the engine switch off and wait for at least 30 seconds.

(f) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

(g) Enter the following menus: Powertrain / Transmission / Trouble Codes.

(h) Read the DTCs.

Powertrain > Transmission > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTC P158504 is output

B
A

END
B

8.

REPLACE TCM

(a) Replace the TCM.

Click here 2020 - 2025 MY Corolla Corolla Hatchback [03/2019 -        ]; K120 / K121 (CVT): K120 TCM: COMPONENTS

NEXT

PERFORM REGISTRATION AND INITIALIZATION

for Registration: Click here 2019 - 2025 MY Corolla Corolla Hatchback [06/2018 -        ]; K120 / K121 (CVT): K120 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: REGISTRATION

for Initialization: Click here 2019 - 2022 MY Corolla Corolla Hatchback [06/2018 - 09/2022]; K120 / K121 (CVT): K120 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: INITIALIZATION 2023 MY Corolla Corolla Hatchback [09/2022 - 11/2022]; K120 / K121 (CVT): K120 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: INITIALIZATION