- DTC judgment completed
- System normal
| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000001NGKC |
| Model Year Start: 2021 | Model: Corolla | Prod Date Range: [04/2020 - 09/2022] |
| Title: 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: P003612,P003614,P014118,P102A9E; HO2S Heater Control Circuit Bank 1 Sensor 2 Circuit Short to Battery; 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022] | ||
|
DTC |
P003612 |
HO2S Heater Control Circuit Bank 1 Sensor 2 Circuit Short to Battery |
|
DTC |
P003614 |
HO2S Heater Control Circuit Bank 1 Sensor 2 Circuit Short to Ground or 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 P013611.
Click here
![2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: P013611,P013613,P013614,P013615,P013617,P01361C,P013623,P013A00; O2 Sensor Circuit Bank 1 Sensor 2 Circuit Short to Ground+](/t3Portal/stylegraphics/info.gif)
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). |
|
Comes on |
DTC stored |
|
|
P003614 |
HO2S Heater Control Circuit Bank 1 Sensor 2 Circuit Short to Ground or Open |
The heated oxygen sensor heater current is the specified value or less while the heater is operating (1 trip detection logic). |
|
Comes on |
DTC stored |
|
|
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). |
|
Comes on |
DTC stored |
|
|
P102A9E |
O2 Sensor Heater Performance Bank 1 Sensor 2 Stuck On |
The heated oxygen sensor heater current is higher than the specified value while the heater is not operating (1 trip detection logic). |
|
Comes on |
DTC stored |
|
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, P003614 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 (Case 1)
|
All of the following conditions are met |
- |
|
Auxiliary battery voltage |
10.5 V or higher |
|
Engine |
Running |
|
Starter |
Off |
|
Catalyst active air fuel ratio control |
Not operating |
|
Time after heater on |
10 seconds or more |
|
Learned heater off current operation |
Completed |
|
Learned heater off current operation |
Succeeded |
|
Heated oxygen sensor heater high current fail (P0038) |
Not detected |
|
Heater on current - Learned heater off current |
0.15 A or less |
|
Command to heater output |
On |
P0037 (Case 2)
|
All of the following conditions are met |
- |
|
Auxiliary battery voltage |
10.5 V or higher |
|
Engine |
Running |
|
Starter |
Off |
|
Catalyst active air fuel ratio control |
Not operating |
|
Time after heater on |
10 seconds or more |
|
Learned heater off current operation |
Completed |
|
Heater off current |
Higher than 3.5 A |
|
Heater current detected by heater monitor IC |
4 A or higher |
|
Heated oxygen sensor heater high current fail (P0038) |
Not detected |
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 |
|
Engine |
Running |
|
Starter |
Off |
|
Catalyst active air fuel ratio control |
Not operating |
|
Time after heater on |
10 seconds or more |
|
Learned heater off current operation |
Completed |
P0141
|
All of the following conditions are met |
- |
|
Heated oxygen sensor heater circuit fail (P0037, P0038 and P102D) |
Not detected |
|
Auxiliary Battery voltage |
10.5 V or higher |
|
Fuel cut |
Off |
|
Time after fuel cut on to off |
30 seconds or more |
|
Accumulated heater on time |
100 seconds or more |
|
Learned heater off current operation |
Completed |
|
Duration that heated oxygen sensor impedance is less than 15 kΩ |
2 seconds or more |
P102D
|
All of the following conditions are met |
- |
|
Auxiliary battery voltage |
10.5 V or higher |
|
Engine |
Running |
|
Starter |
Off |
|
Catalyst active air fuel ratio control |
Not operating |
|
Time after heater on |
10 seconds or more |
|
Learned heater off current operation |
Completed |
|
Heated oxygen sensor heater low current fail (P0037) |
Not detected |
|
Heated oxygen sensor heater high current fail (P0038) |
Not detected |
TYPICAL MALFUNCTION THRESHOLDS
P0037 (Case 1)
|
Heater on current - Learned heater off current |
0.15 A or less |
P0037 (Case 2)
|
Heater on current |
1 A or less |
P0038
|
Both of the following conditions are met |
- |
|
Heater current detected by heater monitor IC |
4 A or higher |
|
Command to heater output |
On |
P0141
|
Heater resistance |
Varies with sensor element temperature (Example: Higher than 23 Ω) |
P102D
|
Heater on current |
Higher than 1 A |
MONITOR RESULT
Refer to detailed information in Checking Monitor Status.
Click here
P0141: O2 Sensor Heater / O2 HEATER PERFORMANCE B1S2
|
Monitor ID |
Test ID |
Scaling |
Unit |
Description |
|---|---|---|---|---|
|
$42 |
$91 |
Multiply by 0.001 |
Ohm |
Oxygen sensor heater resistance 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
-
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG).
- Turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the power switch off and wait for at least 30 seconds.
- Turn the power switch on (IG) [A].
- Turn the Techstream on.
-
Put the engine in Inspection Mode (Maintenance Mode).
Click here
- Start the engine and idle it for 5 minutes or more [B].
-
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.
- Idle the engine for 5 minutes or more [D].
- Enter the following menus: Powertrain / Engine / Trouble Codes [E].
-
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.
- Enter the following menus: Powertrain / Engine / Utility / All Readiness.
- Input the DTC: P003612, P003614, P014118 or P102A9E.
-
Check the DTC judgment result.
Techstream Display
Description
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 P013611.
Click here
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.
- for Nickel Metal Hydride Battery: Click here
- for Lithium-ion Battery: Click here
(Select Powertrain in Health Check and then check the time stamp data.)
Click here
-
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.
- for Nickel Metal Hydride Battery: Click here
- for Lithium-ion Battery: Click here
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
- 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
). 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
HINT:
Perform "Inspection After Repair" after replacing the heated oxygen sensor.
Click here
| NG |
|
|
|
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 |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (NO. 1 INTEGRATION RELAY - HEATED OXYGEN SENSOR) |
|
|
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) - C77-56 (HT1B) |
Always |
Below 1 Ω |
|
C57-1 (HT1B) or C77-56 (HT1B) - Body ground and other terminals |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
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.
|
|
5. |
CHECK WHETHER DTC OUTPUT RECURS (DTC P003612, P003614, 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, P003614, P014118 or P102A9E is output |
B |
| A |
|
| B |
|
|
|