8ZR-FXE ENGINE CONTROL SFI SYSTEM P003612 HO2S Heater Control Circuit Bank 1 Sensor 2 Circuit Short to Battery P003614 HO2S Heater Control Circuit Bank 1 Sensor 2 Circuit Short to Ground or Open P014118 O2 Sensor Heater Circuit Bank 1 Sensor 2 Circuit Current Below Threshold P102A9E O2 Sensor Heater Performance Bank 1 Sensor 2 Stuck On
DESCRIPTION
Refer to DTC P013611.
- 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.
0.125,0.115 3.573,0.458 3.448,0.344 10 false Reference (System Diagram of Sensor 1): 0.188,0.99 1.052,1.333 0.865,0.344 10 false from Auxiliary Battery 0.104,1.906 1.094,2.604 0.99,0.698 10 false from EFI-MAIN NO. 1 Relay 1.146,1.156 1.792,1.875 0.646,0.719 10 false EFI-MAIN NO. 2 1.781,2.208 2.875,2.865 1.094,0.656 10 false EFI-MAIN NO. 2 3.396,1.906 4.906,2.427 1.51,0.521 10 false Heated Oxygen Sensor 3.854,0.677 4.625,1.115 0.771,0.438 10 false Heater 3.833,1.188 4.802,1.698 0.969,0.51 10 false Sensor 3.427,0.875 4.198,1.313 0.771,0.438 10 false +B 3.427,1.417 4.198,1.854 0.771,0.438 10 false E2 4.49,1.417 5.26,1.854 0.771,0.438 10 false OX1B 5.052,1.417 5.823,1.854 0.771,0.438 10 false OX1B 5.063,2.438 5.833,2.875 0.771,0.438 10 false O1B- 4.5,0.885 5.271,1.323 0.771,0.438 10 false HT1B 5.063,0.885 5.833,1.323 0.771,0.438 10 false HT1B 5.823,3.177 6.594,3.615 0.771,0.438 10 false ECM 6.177,1.521 6.979,2.021 0.802,0.5 10 false Duty Control
| 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 |
| P003614 | HO2S Heater Control Circuit Bank 1 Sensor 2 Circuit Short to Ground or 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 heated oxygen sensor (sensor 2) heater circuit ·
Heated oxygen sensor (sensor 2) ·
ECM |
Comes on | DTC stored | SAE Code: P0037 |
| P014118 | O2 Sensor Heater Circuit Bank 1 Sensor 2 Circuit Current Below Threshold | The heated oxygen sensor impedance 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 |
| 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 |
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 or 250 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
| Required Sensors/Components | Heated oxygen sensor (sensor 2) heater |
| Frequency of Operation | Continuous: P0037, P0038, P102D
Once per driving cycle: P0141 |
TYPICAL ENABLING CONDITIONS
| Time after heater on | 5 seconds or more |
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.
·When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Connect the GTS to the DLC3.
Turn the power switch on (IG).
Turn the GTS 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 GTS on.
Put the engine in Inspection Mode (Maintenance Mode).
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] through [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.
| 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 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.
CAUTION / NOTICE / HINT
- NOTICE:
- ·
Vehicle Control History may be stored in the hybrid vehicle control ECU assembly 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.
(Select Powertrain in Health Check and then check the time stamp data.)
·If any "Engine Malfunction" Vehicle Control History item has been stored in the hybrid vehicle control ECU assembly, 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.
·Inspect the fuses for circuits related to this system before performing the following procedure.
- 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.
·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 hereEngine / Hybrid System>8ZR-FXE (ENGINE CONTROL)>SFI SYSTEM>P013611202304,999999,_51,_080778,_0393982,RM100000002BFDX,P013611). 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 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
Inspect the heated oxygen sensor.
- HINT:
-
Perform "Inspection After Repair" after replacing the heated oxygen sensor.
- Result:
Proceed to OK NG
OK
NG
| *a | Front view of wire harness connector
(to Heated Oxygen Sensor) |
Disconnect the heated oxygen sensor connector.
Turn the power switch on (IG).
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
- Result:
Proceed to OK NG
OK
NG
Disconnect the heated oxygen sensor connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition C57-1 (HT1B) - C155-56 (HT1B) Always Below 1 Ω C57-1 (HT1B) or C155-56 (HT1B) - Body ground and other terminals Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG
Connect the GTS to the DLC3.
Turn the power switch on (IG).
Turn the GTS on.
Clear the DTCs.
- Powertrain > Engine > Clear DTCs
- 50002 372
Turn the power switch off and wait for at least 30 seconds.
- Result:
Proceed to NEXT
NEXT
Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
Enter the following menus: Powertrain / Engine / Trouble Codes.
Read the pending DTCs.
- Powertrain > Engine > Trouble Codes
- 50001 372
- Result:
Result Proceed to DTCs are not output A DTC P003612, P003614, P014118 or P102A9E is output B
A
B
Inspect the EFI-MAIN NO. 2 relay.
- Result:
Proceed to OK NG
OK
NG
| *1 | No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly |
| *2 | EFI-MAIN NO. 2 Relay |
Remove the EFI-MAIN NO. 2 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage (for TFTM made):
Tester Connection Condition Specified Condition 3 (EFI-MAIN NO. 2 relay) - Body ground Always 11 to 14 V
- Standard Voltage (for GTMC made):
Tester Connection Condition Specified Condition 5 (EFI-MAIN NO. 2 relay) - Body ground Always 11 to 14 V
- Result:
Proceed to OK NG
OK
NG
Remove the EFI-MAIN NO. 2 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
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
- Result:
Proceed to OK NG
OK
NG
Remove the EFI-MAIN NO. 2 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
Disconnect the heated oxygen sensor connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance (for TFTM made):
Tester Connection Condition Specified Condition 5 (EFI-MAIN NO. 2 relay) - C57-2 (+B) Always Below 1 Ω 5 (EFI-MAIN NO. 2 relay) or C57-2 (+B) - Body ground and other terminals Always 10 kΩ or higher
- Standard Resistance (for GTMC made):
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
- Result:
Proceed to OK NG
OK
NG