P0031

DTC P0031 / P0032

DTC Detecting Condition and Trouble Area






Circuit Diagram










DTC Confirmation Procedure

P0031

1) Push engine switch to change ignition mode to "ON" and leave ignition mode in "ON" for 10 sec.

P0032

2) Run engine at idle speed for 1 min.

DTC Troubleshooting

1.
Was "Engine and Emission Control System Check" performed?
YES -
Go to Step 2.
NO -
Go to Engine and Emission Control System Check Engine and Emission Control System Check.

2. A/F sensor heater power supply circuit check

Confirm that ignition mode of keyless push start system is in "OFF".
Disconnect connector from A/F sensor.
Check for proper terminal connection to A/F sensor.
If connections are OK, push engine switch to change ignition mode to "ON".
Check that "A1" circuit is battery voltage.

Is it in good condition?
YES -
Go to Step 3.
NO -
Repair or replace defective parts or wire harness.

3. A/F sensor heater drive circuit check

Push engine switch to change ignition mode to "OFF".
Disconnect "C01" and "E01" connectors.
Check for proper terminal connection to ECM connectors.
If connections are OK, check the following points.
- Resistance of "A2" circuit: less than 1 ohms
- Resistance between "A2" circuit and ground: infinity
- Resistance between "A2" circuit terminal and each terminal at A/F sensor connector: infinity
- Voltage of "A2" circuit: 0 - 1 V (with ignition mode of keyless push start system in "ON")

Are they in good condition?
YES -
Go to Step 4.
NO -
Repair or replace defective wire harness.

4. A/F sensor check

Check A/F sensor heater. A/F Sensor On-Vehicle Inspection

Is it in good condition?
YES -
Replace ECM and recheck DTC. Service and Repair
NO -
Replace A/F sensor. Service and Repair