DESCRIPTION
Refer to DTC P013611.
Click here
HINT:
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 | Heated oxygen sensor heater current reaches high limit (1 trip detection logic). |
| Comes on | DTC stored | SAE Code: P0038 |
P003614 | HO2S Heater Control Circuit Bank 1 Sensor 2 Circuit Short to Ground or Open | Heated oxygen sensor heater current is the specified value or less while the heater is operating (1 trip detection logic). |
| Comes on | DTC stored | SAE Code: P0037 |
P005612 | HO2S Heater Control Bank 2 Sensor 2 Circuit Short to Battery | Heated oxygen sensor heater current reaches high limit (1 trip detection logic). |
| Comes on | DTC stored | SAE Code: P0058 |
P005614 | HO2S Heater Control Bank 2 Sensor 2 Circuit Short to Ground or Open | Heated oxygen sensor heater current is the specified value or less while the heater is operating (1 trip detection logic). |
| Comes on | DTC stored | SAE Code: P0057 |
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 | SAE Code: P0141 |
P016118 | O2 Sensor Heater Circuit Bank 2 Sensor 2 Circuit Current Below | The cumulative heater resistance correction value exceeds the threshold (2 trip detection logic). |
| Comes on | DTC stored | SAE Code: P0161 |
P102A9E | O2 Sensor Heater Performance Bank 1 Sensor 2 Stuck On | 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 | SAE Code: P102D |
P105A9E | O2 Sensor Heater Performance Bank 2 Sensor 2 Stuck On | 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 | SAE Code: P105D |
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 signals. 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 (P003612, P003614, P005612, P005614, P102A9E and P105A9E):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 in the sensor heater and stores a DTC.
MONITOR STRATEGY
Related DTCs | P0037: Heated oxygen sensor (bank 1 sensor 2) heater range check (low current) P0038: Heated oxygen sensor (bank 1 sensor 2) heater range check (high current) P0057: Heated oxygen sensor (bank 2 sensor 2) heater range check (low current) P0058: Heated oxygen sensor (bank 2 sensor 2) heater range check (high current) P0141: Heated oxygen sensor (bank 1 sensor 2) heater performance P0161: Heated oxygen sensor (bank 2 sensor 2) heater performance P102D: Heated oxygen sensor (bank 1 sensor 2) heater performance P105D: Heated oxygen sensor (bank 2 sensor 2) heater performance |
Required Sensors/Components (Main) | Heated oxygen sensor (sensor 2) heater |
Required Sensors/Components (Related) | - |
Frequency of Operation | Continuous: P0037, P0038, P0057, P0058, P102D, P105D Once per driving cycle: P0141, P0161 |
Duration | 0.5 seconds: P0037, P0057, P102D, P105D 2.064 seconds: P0038, P0058 10 seconds: P0141, P0161 |
MIL Operation | Immediate: P0037, P0038, P0057, P0058, P102D, P105D 2 driving cycles: P0141, P0161 |
Sequence of Operation | None |
TYPICAL ENABLING CONDITIONS
P0037 and P0057: (Case 1) All of the following conditions are met | - |
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, P0058) | Not detected |
Heater on current - Learned heater off current | 0.15 A or less |
Command to heater output | On |
All of the following conditions are met | - |
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 high current fail (P0038, P0058) | Not detected |
Heater off current | Higher than 3.5 A |
Heater current detected by heater monitor IC | 4 A or higher |
Monitor runs whenever the following DTCs are not stored | None |
All of the following conditions are met | - |
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 |
All of the following conditions are met | - |
Heated oxygen sensor heater circuit fail (P0037, P0038, P0057, P0058, P102D and P105D) | Not detected |
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 |
All of the following conditions are met | - |
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, P0057) | Not detected |
Heated oxygen sensor heater high current fail (P0038, P0058) | Not detected |
TYPICAL MALFUNCTION THRESHOLDS
P0037 and P0057: (Case 1) Heater on current - Learned heater off current | 0.15 A or less |
Heater on current | 1 A or less |
Both of the following conditions are met | - |
Heater current detected by heater monitor IC | 4 A or higher |
Command to heater output | On |
Heater resistance | Varies with sensor element temperature (Example: Higher than 23 Ω) |
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 B1S2 Monitor ID | Test ID | Scaling | Unit | Description |
---|---|---|---|---|
$42 | $91 | Multiply by 0.001 | Ohm | Oxygen sensor heater resistance bank 1 sensor 2 |
Monitor ID | Test ID | Scaling | Unit | Description |
---|---|---|---|---|
$46 | $91 | Multiply by 0.001 | Ohm | Oxygen sensor heater resistance bank 2 sensor 2 |
CONFIRMATION DRIVING PATTERN
HINT:
Click here
Click here
HINT:
Techstream Display | Description |
---|---|
NORMAL |
|
ABNORMAL |
|
INCOMPLETE |
|
HINT:
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
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.
HINT:
*: The No. 1 cylinder is the cylinder which is farthest from the transaxle.
Click here
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 | REPLACE HEATED OXYGEN SENSOR |
|
2. | CHECK TERMINAL VOLTAGE (POWER SOURCE OF HEATED OXYGEN SENSOR) |
*a | Front view of wire harness connector (to Heated Oxygen Sensor) | *b | Bank 1 |
*c | Bank 2 | - | - |
(a) Disconnect the heated oxygen sensor 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 |
---|---|---|
C28-2 (+B) - Body ground | Engine switch on (IG) | 11 to 14 V |
C29-2 (+B) - Body ground | Engine switch on (IG) | 11 to 14 V |
NG | REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI-MAIN NO. 1 - 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 |
---|---|---|
C28-1 (HT1B) - C32-50 (HT1B) | Always | Below 1 Ω |
C29-1 (HT2B) - C32-16 (HT2B) | Always | Below 1 Ω |
C28-1 (HT1B) or C32-50 (HT1B) - Body ground and other terminals | Always | 10 kΩ or higher |
C29-1 (HT2B) or C32-16 (HT2B) - 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 engine switch on (IG).
(c) Turn the Techstream on.
(d) Clear the DTC.
Powertrain > Engine > Clear DTCs(e) Turn the engine switch off and wait for at least 30 seconds.
|
5. | CHECK WHETHER DTC OUTPUT RECURS (DTC P003612, P003614, P005612, P005614, P014118, P016118, P102A9E OR P105A9E) |
(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 DTCs.
Powertrain > Engine > Trouble Codes Result | Proceed to |
---|---|
DTCs are not output | A |
DTC P003612, P003614, P005612, P005614, P014118, P016118, P102A9E or P105A9E is output | B |
A | CHECK FOR INTERMITTENT PROBLEMS |
B | REPLACE ECM |