DTC P0032: A/F/O2 Heater Control Circuit High Bank 1 Sensor 1: Notes
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DTC detecting condition:
Immediately at fault recognition
Wiring diagram:
Engine Electrical System Ref. to WIRING SYSTEM>ENGINE ELECTRICAL SYSTEM .
CAUTION:
Use the check board when measuring the ECM terminal voltage and resistance. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>GENERAL DESCRIPTION>PREPARATION TOOL>HOW TO USE CHECK BOARD
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NOTE:
After the faulty parts are repaired or replaced, perform the final check in Basic Diagnostic Procedure. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE
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- CHECK HARNESS BETWEEN ECM AND FRONT OXYGEN (A/F) SENSOR CONNECTOR (SHORT TO POWER SUPPLY)
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- Turn the ignition switch to OFF.
- Measure the voltage between ECM connector and engine ground.
Connector & terminal
(B134) No. 32 (+) - Engine 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)
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- Disconnect the connector from ECM.
- Measure the resistance between the ECM connector and engine ground.
Connector & terminal
(B134) No. 48 - Engine ground:
(B134) No. 47 - Engine ground:
(B134) No. 63 - Engine ground:
(E159) No. 2 - Engine ground:
(E159) No. 10 - Engine ground:
Is the resistance less than 5 Ω?
Yes: Repair the poor contact of ECM connector.
No: Repair the following item.
- Open circuit of harness between ECM connector and engine ground
- Poor contact of coupling connector