Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM10000000255TE
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [09/2022 -           ]
Title: G16E-GTS (ENGINE CONTROL): SFI SYSTEM: P012A11; Turbocharger/Supercharger Inlet Pressure Sensor "A" Circuit Low Circuit Short to Ground; 2023 - 2025 MY GR Corolla [09/2022 -        ]

DTC

P012A11

Turbocharger/Supercharger Inlet Pressure Sensor "A" Circuit Low Circuit Short to Ground

DESCRIPTION

The internal sensor in the manifold absolute pressure sensor detects the air inlet duct internal pressure as a voltage.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Note

P012A11

Turbocharger/Supercharger Inlet Pressure Sensor "A" Circuit Low Circuit Short to Ground

The output voltage from the manifold absolute pressure sensor is below 0.6 V for 3 seconds or more (1 trip detection logic).
  • Open or short in manifold absolute pressure sensor circuit
  • Manifold absolute pressure sensor
  • ECM

Does not come on

SAE Code: P012C

HINT:

When a DTC is output, check the Data List item "Turbocharger/Supercharger Inlet Pressure Bank1" using the GTS.

Click here 2023 - 2025 MY GR Corolla [09/2022 -        ]; G16E-GTS (ENGINE CONTROL): SFI SYSTEM: DATA LIST / ACTIVE TEST

DTC No.

Turbocharger/Supercharger Inlet Pressure Bank1

Malfunction

P012A11

Approximately 0 kPa [0 psi]
  • Short in PIC circuit to ground
  • Short in PIC circuit to EPR circuit
  • Open in VCPR circuit

If the Data List displays a normal value, the normal value may be due to a temporary recovery from the malfunction condition. Check for intermittent problems.

MONITOR DESCRIPTION

The ECM calculates the air inlet duct internal pressure from the manifold absolute pressure sensor output voltage. If the manifold absolute pressure sensor output voltage is not within the normal range, there may be a malfunction in the manifold absolute pressure sensor or an open or short circuit. In this case, the ECM stores a DTC.

Example:

When the sensor output voltage is below 0.6 V for 3 seconds or more, the ECM stores a DTC.

CONFIRMATION DRIVING PATTERN

  1. Connect the GTS to the DLC3.
  2. Turn the ignition switch to ON and turn the GTS on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  4. Turn the ignition switch off and wait for at least 30 seconds.
  5. Turn the ignition switch to ON and turn the GTS on.
  6. Start the engine and wait 5 seconds or more.
  7. Enter the following menus: Powertrain / Engine / Trouble Codes.
  8. Read the pending DTCs.

    HINT:

    • If a pending DTC is output, the system is malfunctioning.
    • If a pending DTC is not output, perform the following procedure.
  9. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  10. Input the DTC: P012A11.
  11. Check the DTC judgment result.

    GTS 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

    HINT:

    • If the judgment result shows NORMAL, the system is normal.
    • If the judgment result shows ABNORMAL, the system has a malfunction.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

HINT:

Read Freeze Frame Data using the GTS. The ECM 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 HARNESS AND CONNECTOR

HINT:

Make sure that the connector is properly connected. If it is not, securely connect it and check for DTCs again.

(a) Disconnect the manifold absolute pressure sensor connector.

(b) Turn the ignition switch to ON.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

C134-3(VC) - C134-1(E2)

Ignition switch ON

4.5 to 5.5 V

C134-2(PIC) - C134-1(E2)

Ignition switch ON

3.0 to 5.5 V

*a

Front view of wire harness connector

(to Manifold Absolute Pressure Sensor)

(d) Turn the ignition switch off and wait for at least 30 seconds.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

C134-3(VC) - C134-2(PIC)

Ignition switch off

171 to 189 kΩ
OK

REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR

NG

2.

CHECK HARNESS AND CONNECTOR (MANIFOLD ABSOLUTE PRESSURE SENSOR - ECM)

(a) Disconnect the manifold absolute pressure sensor connector.

(b) Disconnect the ECM connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

C134-3(VC) - C142-82(VCPC)

Always

Below 1 Ω

C134-2(PIC) or C142-105(PIC) - Body ground and other terminals

Always

10 kΩ or higher
OK

REPLACE ECM 2023 MY GR Corolla [09/2022 - 11/2022]; G16E-GTS (ENGINE CONTROL): ECM: REMOVAL 2023 - 2025 MY GR Corolla [11/2022 -        ]; G16E-GTS (ENGINE CONTROL): ECM: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR