DTC P0030 - Ho2S Heater Control Circuit (Bank 1 Sensor 1) -
WARNING: This page is about a different variant/trim than selected.
- DTC DETECTING CONDITION:
- Two consecutive driving cycles with malfunction
CAUTION: After repair or replacement of malfunctioning parts, conduct Clear Memory Mode < Ref. to OPERATION , CLEAR MEMORY MODE> and INSPECTION MODE < Ref. to OPERATION , INSPECTION MODE. > - WIRING DIAGRAM:
DIAGNOSTIC PROCEDURE
| Step | Check | Yes | No |
|---|---|---|---|
1 CHECK HARNESS BETWEEN ECM AND FRONT OXYGEN (A/F) SENSOR CONNECTOR.
|
Is the measured value less than 1 Ω? | Go to step 2. | Repair open circuit between ECM and front oxygen (A/F) sensor connector. |
| 2 CHECK HARNESS BETWEEN ECM AND FRONT OXYGEN (A/F) SENSOR CONNECTOR. Measure harness resistance between ECM and front oxygen (A/F) sensor connector. Connector & terminal (B136) No. 13 - (B18) No. 1: (B136) No. 22 - (B18) No. 2: |
Is the measured value less than 1 Ω? | Go to step 3. | Repair open circuit between ECM and front oxygen (A/F) sensor connector. |
| 3 CHECK HARNESS BETWEEN ECM AND FRONT OXYGEN (A/F) SENSOR CONNECTOR. Measure harness resistance between main relay and front oxygen (A/F) sensor connector. Connector & terminal (B47) No. 4 - (B18) No. 4: |
Is the measured value less than 1 Ω? | Go to step 4. | Repair open circuit between ECM and front oxygen (A/F) sensor connector. |
| 4 CHECK FRONT OXYGEN (A/F) SENSOR. Measure resistance between terminals in front oxygen (A/F) sensor connector. Terminal No. 3 - No. 4: |
Is the measured value less than 5 Ω? | Go to step 5. | Replace front oxygen (A/F) sensor. < Ref. to FRONT OXYGEN (A/F) SENSOR . > |
| 5 CHECK POOR CONTACT. Check ECM and front oxygen (A/F) sensor connector for poor contact. |
Is there any poor contact in ECM and front oxygen (A/F) sensor connector. | Repair poor contact in ECM and front oxygen (A/F) sensor connector. | Replace front oxygen (A/F) sensor. < Ref. to FRONT OXYGEN (A/F) SENSOR . > |