Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000026EFA
Model Year Start: 2023 Model: Corolla Prod Date Range: [09/2022 -           ]
Title: 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: P003612,P003613,P014118,P102A9E; HO2S Heater Control Circuit Bank 1 Sensor 2 Circuit Short to Battery; 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]

DTC

P003612

HO2S Heater Control Circuit Bank 1 Sensor 2 Circuit Short to Battery

DTC

P003613

A/F (O2) Heater Control Circuit Bank 1 Sensor 2 Circuit Open

DTC

P014118

O2 Sensor Heater Circuit Bank 1 Sensor 2 Circuit Current Below Threshold

DTC

P102A9E

O2 Sensor Heater Performance Bank 1 Sensor 2 Stuck On

DESCRIPTION

Refer to DTC P013613.

Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: P013613,P013617,P01361C,P013623,P013A00; O2 Sensor Circuit Bank 1 Sensor 2 Circuit Open+

HINT:

  • When any of these DTCs are stored, the ECM enters fail-safe mode. The ECM turns off the heated oxygen sensor heater in fail-safe mode. Fail-safe mode continues until the power switch is turned off.
  • The heated oxygen sensor heater circuit uses a relay on the +B side of the circuit.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P003612

HO2S Heater Control Circuit Bank 1 Sensor 2 Circuit Short to Battery

The heated oxygen sensor heater current is the specified value or higher while the heater is operating (1 trip detection logic).

  • Short in heated oxygen sensor (sensor 2) heater circuit
  • Heated oxygen sensor (sensor 2)
  • ECM

Comes on

DTC stored

  • SAE Code: P0038
  • DTC for Mexico Models: Applies

P003613

A/F (O2) Heater Control Circuit Bank 1 Sensor 2 Circuit Open

The heated oxygen sensor heater current is less than the specified value while the heater is operating (1 trip detection logic).

  • Open or short in oxygen sensor (sensor 2) heater circuit
  • Oxygen sensor (sensor 2)
  • EFI-MAIN NO. 2 relay
  • ECM

Comes on

DTC stored

  • SAE Code: P0037
  • DTC for Mexico Models: Applies

P014118

O2 Sensor Heater Circuit Bank 1 Sensor 2 Circuit Current Below Threshold

The cumulative heater resistance correction value exceeds the threshold (2 trip detection logic).

  • Open or short in heated oxygen sensor (sensor 2) heater circuit
  • Heated oxygen sensor (sensor 2)
  • ECM

Comes on

DTC stored

  • SAE Code: P0141
  • DTC for Mexico Models: Does not apply

P102A9E

O2 Sensor Heater Performance Bank 1 Sensor 2 Stuck On

The heated oxygen sensor heater voltage is the specified value or less while the heater is not operating (1 trip detection logic).

  • Short in heated oxygen sensor (sensor 2) heater circuit
  • Heated oxygen sensor (sensor 2)
  • ECM

Comes on

DTC stored

  • SAE Code: P102D
  • DTC for Mexico Models: Applies

MONITOR DESCRIPTION

The sensing portion of the heated oxygen sensor has a zirconia element which is used to detect the oxygen concentration in the exhaust gas. If the zirconia element is at the appropriate temperature, and the difference between the oxygen concentrations surrounding the inside and outside surfaces of the sensor is large, the zirconia element generates voltage. In order to increase the oxygen concentration detecting capacity of the zirconia element, the ECM supplements the heat from the exhaust with heat from a heating element inside the sensor.

Heated Oxygen Sensor Heater Range Check and Heater Performance (Stuck ON) (P003612, P003613 and P102A9E):

  • The ECM monitors the current applied to the heated oxygen sensor heater to check the heater for malfunctions.

    If the heater current is outside the normal range, the signal transmitted by the heated oxygen sensor becomes inaccurate. When the current in the heated oxygen sensor heater is outside the normal operating range, the ECM interprets this as a malfunction of the sensor heater and stores a DTC.

Heated Oxygen Sensor Heater Performance (Heater Impedance) (P014118):

  • After the accumulated heater on time exceeds 100 seconds, the ECM calculates the heater resistance using auxiliary battery voltage and the current applied to the heater. If the resistance is above the threshold value, the ECM determines that there is a malfunction in the heated oxygen sensor heater and stores DTC P014118.

MONITOR STRATEGY

Related DTCs

P0037: Heated oxygen sensor (sensor 2) heater range check (low current)

P0038: Heated oxygen sensor (sensor 2) heater range check (high current)

P0141: Heated oxygen sensor (sensor 2) heater performance

P102D: Heated oxygen sensor (sensor 2) heater performance

Required Sensors/Components (Main)

Heated oxygen sensor (sensor 2) heater

Required Sensors/Components (Related)

-

Frequency of Operation

Continuous: P0037, P0038, P102D

Once per driving cycle: P0141

Duration

0.5 seconds: P0037, P102D

Within 3 seconds: P0038

10 seconds: P0141

MIL Operation

Immediate: P0037, P0038, P102D

2 driving cycles: P0141

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

P0037

All of the following conditions are met

-

Auxiliary battery voltage

10.5 V or higher

Time after heater on

5 seconds or more

Oxygen sensor heater performance fail (P102D)

Not detected

Heater high current cutout

Off

P0038

Monitor runs whenever the following DTCs are not stored

None

All of the following conditions are met

-

Auxiliary battery voltage

10.5 V or higher

Time after heater on

5 seconds or more

Heater high current cutout

Off

P0141

All of the following conditions are met

-

Heated oxygen sensor heater circuit fail (P0037, P0038 and P102D)

Not detected

Oxygen Sensor circuit fail (P0137, P22AC)

Not detected

Oxygen Sensor positive terminal voltage

Higher than 1.7 V

Auxiliary Battery voltage

11 V or higher

Either of the following conditions is met

A or B

A. All of the following conditions are met

-

Fuel cut

Off

Time after fuel cut on to off

30 seconds or more

Accumulated heater on time

100 seconds or more

B. Accumulated heater ON time

250 seconds or more

P102D

Monitor runs whenever the following DTCs are not stored

None

Auxiliary battery voltage

10.5 V or higher

TYPICAL MALFUNCTION THRESHOLDS

P0037

Heater on current

Less than 0.15 A

P0038

Heater current

4.05 A or higher

P0141

Oxygen Sensor impedance

Higher than 2000 Ω

P102D

Heater terminal voltage level while heater OFF

Low

MONITOR RESULT

Refer to detailed information in Checking Monitor Status.

Click here 2020 - 2025 MY Corolla Corolla HV [01/2019 -        ]; 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: CHECKING MONITOR STATUS

P0141: O2 Sensor Heater / O2 HEATER PERFORMANCE B1S2

Monitor ID

Test ID

Scaling

Unit

Description

$42

$92

Multiply by 1

Ohm

Oxygen sensor impedance bank 1 sensor 2

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 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR

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

    Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR

  1. Connect the Techstream to the DLC3.
  2. Turn the power switch on (IG).
  3. Turn the Techstream on.
  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  5. Turn the power switch off and wait for at least 30 seconds.
  6. Turn the power switch on (IG) [A].
  7. Turn the Techstream on.
  8. Put the engine in Inspection Mode (Maintenance Mode).

    Click here 2019 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 -        ]; INTRODUCTION: REPAIR INSTRUCTION: INSPECTION MODE PROCEDURE

  9. Start the engine and idle it for 5 minutes or more [B].
  10. With the vehicle stationary, depress the accelerator pedal and maintain an engine speed of 2500 rpm for 1 minute [C].

    HINT:

    During charge control, the engine speed is set at idle. Therefore, the engine speed will not increase when the accelerator pedal is depressed. In this case, perform steps [C] and [D] after charge control has completed.

  11. Idle the engine for 5 minutes or more [D].
  12. Enter the following menus: Powertrain / Engine / Trouble Codes [E].
  13. 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.
  14. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  15. Input the DTC: P003612, P003613, P014118 or P102A9E.
  16. 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

    HINT:

    • If the judgment result is NORMAL, the system is normal.
    • If the judgment result is ABNORMAL, the system has a malfunction.
    • If the judgment result is INCOMPLETE, perform steps [B] through [E] again.
    • [A] to [E]: Normal judgment procedure.

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

    • When clearing the permanent DTCs, do not disconnect the cable from the auxiliary battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.

WIRING DIAGRAM

Refer to DTC P013613.

Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: P013613,P013617,P01361C,P013623,P013A00; O2 Sensor Circuit Bank 1 Sensor 2 Circuit Open+

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • Vehicle Control History may be stored in the hybrid vehicle control ECU if the engine is malfunctioning. Certain vehicle condition information is recorded when Vehicle Control History is stored. Reading the vehicle conditions recorded in both the freeze frame data and Vehicle Control History can be useful for troubleshooting.

    Click here 2023 - 2025 MY Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY with PA10): VEHICLE CONTROL HISTORY (RoB)

    (Select Powertrain in Health Check and then check the time stamp data.)

    Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR

  • If any "Engine Malfunction" Vehicle Control History item has been stored in the hybrid vehicle control ECU, make sure to clear it. However, as all Vehicle Control History items are cleared simultaneously, if any Vehicle Control History items other than "Engine Malfunction" are stored, make sure to perform any troubleshooting for them before clearing Vehicle Control History.

    Click here 2023 - 2025 MY Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY with PA10): VEHICLE CONTROL HISTORY (RoB)

HINT:

  • The operation of the heated oxygen sensor heater can be checked by referring to the Data List items "O2 Sensor Heater B1S2" and "O2 Sensor Heater Current Value B1S2".

    Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: DATA LIST / ACTIVE TEST

  • Sensor 1 refers to the sensor closest to the engine assembly.
  • Sensor 2 refers to the sensor farthest away from the engine assembly.
  • When the value of the Data List item O2 Sensor Heater Current Value B1S2 is not 0 A, the heater is on.
  • Change the fuel injection volume using the Active Test "Control the Injection Volume for A/F Sensor" and monitor the heated oxygen sensor output voltage (Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: P013613,P013617,P01361C,P013623,P013A00; O2 Sensor Circuit Bank 1 Sensor 2 Circuit Open ). If the sensor output voltage does not change (almost no reaction) while performing the Active Test, the sensor may be malfunctioning.
  • Read freeze frame data using the Techstream. 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.

INSPECT HEATED OXYGEN SENSOR (HEATER RESISTANCE)

(a) Inspect the heated oxygen sensor.

Click here 2020 - 2025 MY Corolla Corolla HV [01/2019 -        ]; 2ZR-FXE (ENGINE CONTROL): HEATED OXYGEN SENSOR: INSPECTION

HINT:

Perform "Inspection After Repair" after replacing the heated oxygen sensor.

Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION

NG

REPLACE HEATED OXYGEN SENSOR

OK

2.

CHECK TERMINAL VOLTAGE (POWER SOURCE OF HEATED OXYGEN SENSOR)

*a

Front view of wire harness connector

(to Heated Oxygen Sensor)

(a) Disconnect the heated oxygen sensor connector.

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

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

C57-2 (+B) - Body ground

Power switch on (IG)

11 to 14 V

NG

GO TO STEP 6

OK

3.

CHECK HARNESS AND CONNECTOR (HEATED OXYGEN SENSOR - ECM)

(a) Disconnect the heated oxygen 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

C57-1 (HT1B) - C147-56 (HT1B)

Always

Below 1 Ω

C57-1 (HT1B) or C147-56 (HT1B) - Body ground and other terminals

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Clear the DTCs.

Powertrain > Engine > Clear DTCs

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

NEXT

5.

CHECK WHETHER DTC OUTPUT RECURS (DTC P003612, P003613, P014118 OR P102A9E)

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

(b) Enter the following menus: Powertrain / Engine / Trouble Codes.

(c) Read the pending DTCs.

Powertrain > Engine > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTC P003612, P003613, P014118 or P102A9E is output

B

A

CHECK FOR INTERMITTENT PROBLEMS

B

REPLACE ECM 2023 MY Corolla Corolla HV [09/2022 - 11/2022]; 2ZR-FXE (ENGINE CONTROL): ECM: REMOVAL 2023 - 2025 MY Corolla Corolla HV [11/2022 -        ]; 2ZR-FXE (ENGINE CONTROL): ECM: REMOVAL

6.

INSPECT EFI-MAIN NO. 2 RELAY

(a) Inspect the EFI-MAIN NO. 2 relay.

Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; 2ZR-FXE (ENGINE CONTROL): RELAY: ON-VEHICLE INSPECTION

NG

REPLACE EFI-MAIN NO. 2 RELAY

OK

7.

CHECK TERMINAL VOLTAGE (POWER SOURCE OF EFI-MAIN NO. 2 RELAY)

*1

No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly

*2

EFI-MAIN NO. 2 Relay

(a) Remove the EFI-MAIN NO. 2 relay from the No. 1 engine room relay block and No. 1 junction block assembly.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

5 (EFI-MAIN NO. 2 relay) - Body ground

Always

11 to 14 V

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (AUXILIARY BATTERY - EFI-MAIN NO. 2 RELAY)

OK

8.

CHECK HARNESS AND CONNECTOR (EFI-MAIN NO. 2 RELAY - BODY GROUND)

(a) Remove the EFI-MAIN NO. 2 relay from the No. 1 engine room relay block and No. 1 junction block assembly.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

1 (EFI-MAIN NO. 2 relay) - Body ground

Always

Below 1 Ω

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

9.

CHECK HARNESS AND CONNECTOR (EFI-MAIN NO. 2 RELAY - HEATED OXYGEN SENSOR)

(a) Remove the EFI-MAIN NO. 2 relay from the No. 1 engine room relay block and No. 1 junction block assembly.

(b) Disconnect the heated oxygen sensor connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

3 (EFI-MAIN NO. 2 relay) - C57-2 (+B)

Always

Below 1 Ω

3 (EFI-MAIN NO. 2 relay) or C57-2 (+B) - Body ground and other terminals

Always

10 kΩ or higher

OK

REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI-MAIN NO. 1 RELAY - EFI-MAIN NO. 2 RELAY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR