7GR-FKS 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 P005612 HO2S Heater Control Bank 2 Sensor 2 Circuit Short to Battery P005614 HO2S Heater Control Bank 2 Sensor 2 Circuit Short to Ground or Open P102A9E O2 Sensor Heater Performance Bank 1 Sensor 2 Stuck On P105A9E O2 Sensor Heater Performance Bank 2 Sensor 2 Stuck On
DESCRIPTION
Refer to DTC P013613.
- 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 ignition switch is turned off.
·The heated oxygen sensor heater circuit uses a relay on the +B side of the circuit.
0.167,1.094 2,1.292 1.833,0.198 10 false from Battery 2.125,2.354 4.271,2.552 2.146,0.198 10 false EFI MAIN 1.177,1.25 1.813,1.677 0.635,0.427 10 false EFI-MAIN 3.469,1.01 3.781,1.208 0.313,0.198 10 false +B 3.479,1.552 3.792,1.75 0.313,0.198 10 false E2 4.51,1.01 5.125,1.208 0.615,0.198 10 false HT1B 4.5,1.531 5.115,1.729 0.615,0.198 10 false OX1B 3.906,1.25 4.823,1.448 0.917,0.198 10 false Heater 3.885,1.885 4.802,2.083 0.917,0.198 10 false Sensor 3.49,2.24 6.552,2.438 3.063,0.198 10 false Heated Oxygen Sensor 5.125,0.99 5.74,1.188 0.615,0.198 10 false HT1B 5.115,1.542 5.729,1.74 0.615,0.198 10 false OX1B 5.125,2.583 5.74,2.781 0.615,0.198 10 false EX1B 5.125,2.99 5.74,3.188 0.615,0.198 10 false MREL 5.844,3.469 6.302,3.667 0.458,0.198 10 false ECM 0.083,0.094 7.115,0.292 7.031,0.198 10 false Reference (System Diagram of Bank 1 Sensor 2): 2.979,1.26 3.667,1.49 0.688,0.229 10 false EFI NO. 2
| 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). | ·
Short in heated oxygen sensor (bank 1 sensor 2) heater circuit ·
Heated oxygen sensor (bank 1 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 | Heated oxygen sensor heater current is the specified value or less while the heater is operating (1 trip detection logic). | ·
Open or short in heated oxygen sensor (bank 1 sensor 2) heater circuit ·
Heated oxygen sensor (bank 1 sensor 2) ·
ECM |
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). | ·
Short in heated oxygen sensor (bank 2 sensor 2) heater circuit ·
Heated oxygen sensor (bank 2 sensor 2) ·
ECM |
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). | ·
Open or short in heated oxygen sensor (bank 2 sensor 2) heater circuit ·
Heated oxygen sensor (bank 2 sensor 2) ·
ECM |
Comes on | DTC stored | SAE Code: P0057 |
| 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). | ·
Short in heated oxygen sensor (bank 1 sensor 2) heater circuit ·
Heated oxygen sensor (bank 1 sensor 2) ·
ECM |
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). | ·
Short in heated oxygen sensor (bank 2 sensor 2) heater circuit ·
Heated oxygen sensor (bank 2 sensor 2) ·
ECM |
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):
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 in the sensor heater and stores a DTC.
MONITOR STRATEGY
| Required Sensors/Components | Heated oxygen sensor (sensor 2) heater |
| Frequency of Operation | Continuous |
TYPICAL ENABLING CONDITIONS
| Time after heater on | 10 seconds or more |
CONFIRMATION DRIVING PATTERN
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON [A].
Turn the GTS on.
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 3000 rpm for 1 minute [C].
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, P005612, P005614, P014118, P016118, P102A9E or P105A9E.
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.
WIRING DIAGRAM
Refer to DTC P013613.
CAUTION / NOTICE / HINT
- NOTICE:
-
Inspect the fuses for circuits related to this system before performing the following procedure.
- HINT:
- ·
Bank 1 refers to the bank that includes the No. 1 cylinder*.
*: The No. 1 cylinder is the cylinder which is farthest from the transmission.
·Bank 2 refers to the bank that does not include the No. 1 cylinder.
·Sensor 1 refers to the sensor closest to the engine assembly.
·Sensor 2 refers to the sensor farthest away from the engine assembly.
·Refer to "Data List / Active Test" [O2 Sensor Heater B1S2, O2 Sensor Heater Current Value B1S2, O2 Sensor Heater B2S2 and O2 Sensor Heater Current Value B2S2].
·When the values for the Data List item O2 Sensor Heater Current Value B1S2 and O2 Sensor Heater Current Value B2S2 are not 0 A, the heater is on.
·Change the fuel injection volume using the Control the Injection Volume for A/F Sensor function provided in the Active Test and monitor the heated oxygen sensor output voltage (Click here Engine / Hybrid System>7GR-FKS (ENGINE CONTROL)>SFI SYSTEM>P013613201902,999999,_51,_078720,_0381907,RM100000001G2W4,P013613). 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.
- Result:
Proceed to OK NG
OK
NG
| *a | Front view of wire harness connector
(to Heated Oxygen Sensor) |
| *b | Bank 1 (for Automatic Transmission Models) |
| *c | Bank 2 (for Automatic Transmission Models) |
| *d | Bank 1 (for Manual Transmission Models) |
| *e | Bank 2 (for Manual Transmission Models) |
Disconnect the heated oxygen sensor connector.
Turn the ignition switch to ON.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage (for Automatic Transmission Models):
Tester Connection Condition Specified Condition E50-2 (+B) - Body ground Ignition switch ON 11 to 14 V E47-2 (+B) - Body ground Ignition switch ON 11 to 14 V
- Standard Voltage (for Manual Transmission Models):
Tester Connection Condition Specified Condition E51-2 (+B) - Body ground Ignition switch ON 11 to 14 V E48-2 (+B) - Body ground Ignition switch ON 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 (for Automatic Transmission Models):
Tester Connection Condition Specified Condition E50-1 (HT1B) - N1-4 (HT1B) Always Below 1 Ω E47-1 (HT2B) - N1-3 (HT2B) Always Below 1 Ω E50-1 (HT1B) or N1-4 (HT1B) - Body ground and other terminals Always 10 kΩ or higher E47-1 (HT2B) or N1-3 (HT2B) - Body ground and other terminals Always 10 kΩ or higher
- Standard Resistance (for Manual Transmission Models):
Tester Connection Condition Specified Condition E51-1 (HT1B) - N1-4 (HT1B) Always Below 1 Ω E48-1 (HT2B) - N1-3 (HT2B) Always Below 1 Ω E51-1 (HT1B) or N1-4 (HT1B) - Body ground and other terminals Always 10 kΩ or higher E48-1 (HT2B) or N1-3 (HT2B) - 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 ignition switch to ON.
Turn the GTS on.
Clear the DTC.
- Powertrain > Engine > Clear DTCs
- 50002 372
Turn the ignition 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 DTCs.
- Powertrain > Engine > Trouble Codes
- 50001 372
- Result:
Result Proceed to DTCs are not output A DTC P003612, P003614, P005612, P005614, P102A9E or P105A9E is output B
A
B