DTC P0032: A/F/O2 Heater Control Circuit High Bank 1 Sensor 1: Notes
- -
DTC detecting condition:
Immediately at fault recognition
Wiring diagram:
Engine Electrical System Ref. to WIRING SYSTEM (IMPREZA MODEL)>ENGINE ELECTRICAL SYSTEM>WIRING DIAGRAM . Ref. to WIRING SYSTEM (CROSSTREK MODEL (EXCEPT FOR HEV))>ENGINE ELECTRICAL SYSTEM>WIRING DIAGRAM .
- IMPREZA MODEL
- CROSSTREK MODEL
CAUTION: Use the check board when measuring the ECM terminal voltage and resistance. Ref. to ENGINE (DIAGNOSTICS) (H4DO 2.0 (EXCEPT FOR HEV))>GENERAL DESCRIPTION>PREPARATION TOOL>HOW TO USE CHECK BOARD .NOTE: After the faulty parts are repaired or replaced, perform the final check in Basic Diagnostic Procedure. Ref. to ENGINE (DIAGNOSTICS) (H4DO 2.0 (EXCEPT FOR HEV))>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE .
- CHECK HARNESS BETWEEN ECM AND FRONT OXYGEN (A/F) SENSOR (SHORT TO POWER SUPPLY)
.
- Turn the ignition switch to OFF.
- Disconnect the connector from ECM.
- Measure the voltage between ECM connector and chassis ground.
Connector and terminal
(E158) No. 88 (+) - Chassis ground (-):
Is the voltage 10 V or more?
Yes: Repair the short circuit to power in the harness between ECM connector and front oxygen (A/F) sensor connector.
No: Go to 2.
- CHECK GROUND CIRCUIT FOR ECM (OPEN CIRCUIT)
.
- Disconnect the connector from ECM.
- Measure the resistance between ECM connector and chassis ground.
Connector and terminal
(B134) No. 69 - Chassis ground:
(B134) No. 70 - Chassis ground:
(B134) No. 71 - Chassis ground:
(B134) No. 72 - Chassis ground:
Is the resistance less than 5 Ω?
Yes: Repair the poor contact of ECM connector.
No: Check the harnesses and connectors, and repair or replace them if necessary.
NOTE: In this case, repair the following item:- Open circuit of harness between ECM connector and engine ground
- Poor contact of coupling connector