4.
Is the sensor switching properly?
 | ▶ Go to "Check HO2S" as below. |
 | ▶ Substitute with a known - good HO2S and check for proper operation. If the problem is corrected, go to "Verification of Vehicle Repair" procedure. |
IG "OFF" and connect HO2S connector.
Engine start.
After warming-up, monitor signal waveform of HO2S with GDS.
Specification : Refer to Signal Waveform & Data
Is the sensor switching properly?
| ▶ Go to "Check HO2S" as below. |
| ▶ Substitute with a known - good HO2S and check for proper operation. If the problem is corrected, go to "Verification of Vehicle Repair" procedure. |
IG "OFF" and disconnect HO2S connector.
Check that the HO2S is securely installed.
Check the HO2S for contamination or damage
Is the sensor normal?
| ▶ Substitute with a known - good ECM and check for proper operation. If the problem is corrected, replace ECM and go to "Verification of Vehicle Repair" procedure. |
| ▶ Substitute with a known - good HO2S and check for proper operation. If the problem is corrected, go to "Verification of Vehicle Repair" procedure. |
