Subaru Crosstrek Service Manual: Dtc p0032 a/f / o2 heater control circuit high bank 1 sensor 1
ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC P0032 A/F / O2 HEATER CONTROL CIRCUIT HIGH BANK 1 SENSOR 1
DTC DETECTING CONDITION:
Immediately at fault recognition
CAUTION:
After servicing or replacing faulty parts, perform Clear Memory Mode Clear Memory Mode > OPERATION">
, and Inspection Mode Inspection Mode > PROCEDURE">.
WIRING DIAGRAM:
Engine electrical system Engine Electrical System">
| STEP | CHECK | YES | NO |
1.CHECK HARNESS BETWEEN ECM AND FRONT OXYGEN (A/F) SENSOR CONNECTOR.
1) Turn the ignition switch to OFF.
2) Measure the voltage between ECM connector and chassis ground.
Connector & terminal
(B136) No. 5 (+) — Chassis ground (−):
Is the voltage 10 V or more?
Repair the short circuit to power in the harness between ECM connector and front oxygen (A/F) sensor connector.
Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0032 A/F / O2 HEATER CONTROL CIRCUIT HIGH BANK 1 SENSOR 1">Go to Step 2.
2.CHECK GROUND CIRCUIT FOR ECM.
1) Disconnect the connector from ECM.
2) Measure the resistance between ECM connector and chassis ground.
Connector & terminal
(B134) No. 3 — Chassis ground:
(B134) No. 4 — Chassis ground:
(B136) No. 1 — Chassis ground:
(B136) No. 2 — Chassis ground:
(B136) No. 3 — Chassis ground:
Is the resistance less than 5 ??
Repair the poor contact of ECM connector.
Repair the harness and connector.
NOTE:
In this case, repair the following item:
• Open circuit of harness between ECM connector and engine ground
• Poor contact of coupling connector
1. OUTLINE OF DIAGNOSIS
Detect front oxygen (A/F) sensor heater open or short circuit.
The front oxygen (A/F) sensor heater performs duty control, and the output terminal voltage at ON is 0 V, and the output terminal voltage at OFF is the battery voltage.
Judge as NG when the terminal voltage remains High.
2. COMPONENT DESCRIPTION
(A) | Battery voltage | (B) | Front oxygen (A/F) sensor heater output voltage | (C) | 128 ms |
(D) | High error |
3. EXECUTION CONDITION
Secondary Parameters | Execution condition |
Battery voltage | ≥ 10.9 V |
Primary oxygen sensor heater control duty | > 12.5 % |
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
5. DIAGNOSTIC METHOD
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Malfunction Criteria | Threshold Value |
Measured primary oxygen sensor heater control voltage | ≥ 1.9 V |
Time Needed for Diagnosis: 2 seconds
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
Dtc p0031 a/f / o2 heater control circuit low bank 1 sensor 1
ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)DTC P0031 A/F / O2 HEATER CONTROL CIRCUIT LOW BANK 1 SENSOR 1DTC DETECTING CONDITION:Immediately at fault recogni ...
Dtc p0037 a/f / o2 heater control circuit low bank 1 sensor 2
ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)DTC P0037 A/F / O2 HEATER CONTROL CIRCUIT LOW BANK 1 SENSOR 2DTC DETECTING CONDITION:Detected when two consecutiv ...
Other materials:
Removal
SEAT BELT SYSTEM > Rear Seat BeltREMOVAL1. SEAT BELT OUTER - REAR RH & LHCAUTION:• Airbag system satellite safing sensor is located in the lower of the rear seat cushion center. Be careful not to apply strong impact to the sensor when working with the rear seat cushion removed.• B ...
List
TIRE PRESSURE MONITORING SYSTEM (DIAGNOSTICS) > Read Current DataLISTDisplayContents to be displayedUnit of measureTire 1 FN codeLEARN, LOW BAT, OFF, WAKE, RE ME, NORMALLEARN: Transmitted transmitter ID using the transmitter registration toolLOW BAT: Transmitter battery voltage running lowOFF: Tr ...
Dtc c2022 tire 2 air pressure low (normal mode)
TIRE PRESSURE MONITORING SYSTEM (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)DTC C2022 TIRE 2 AIR PRESSURE LOW (NORMAL MODE)NOTE:Refer to DTC C2024 for diagnostic procedure. Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C2024 TIRE 4 AIR PRESSURE LOW ( ...