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DTC P0032 HO2S HEATER CONTROL CIRCUIT HIGH (BANK 1 SENSOR 1)

DTC P0032 HO2S HEATER CONTROL CIRCUIT HIGH (BANK 1 SENSOR 1)

DTC DETECTING CONDITION:


• Immediately at fault recognition

• GENERAL DESCRIPTION


Important

After repair or replacement of faulty parts, conduct Clear Memory Mode and Inspection Mode .


WIRING DIAGRAM:


CHECK OUTPUT SIGNAL FROM ECM.

Turn the ignition switch to ON.

Measure the voltage between ECM connector and chassis ground.

Connector & terminal

(B84) No. 4 (+) — Chassis ground (−):

(B84) No. 5 (+) — Chassis ground (−):

Is the voltage more than 8 V?

Yes


No


CHECK FRONT OXYGEN (A/F) SENSOR HEATER CURRENT.

Turn the ignition switch to OFF.

Repair the battery short circuit in harness between ECM and front oxygen (A/F) sensor connector.

Turn the ignition switch to ON.

Read the data of front oxygen (A/F) sensor heater current using Vehicle Diagnostic Interface or the OBD-II general scan tool.

Note
• Vehicle Diagnostic Interface

For detailed operation procedure, refer to the “READ CURRENT DATA FOR ENGINE”.

• OBD-II general scan tool

For detailed operation procedure, refer to the OBD-II General Scan Tool Instruction Manual.


Is the current more than 2.3 A?

Yes

Replace the ECM.


No

END


CHECK OUTPUT SIGNAL FROM ECM.

Measure the voltage between ECM connector and chassis ground.

Connector & terminal

(B84) No. 4 (+) — Chassis ground (−):

(B84) No. 5 (+) — Chassis ground (−):

Shake the ECM harness and connector, while monitoring value of voltage meter. Does the voltage change?

Yes

Repair the battery short circuit in harness between ECM and front oxygen (A/F) sensor connector.


No

END