DTC Confirmation Test (Using Generic Scan Tool)

WARNING: This page is about a different car, the 2003 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Use the following test to check overall function of the closed loop control. During this test, a DTC may not be confirmed.

NOTE: If a DTC confirmation test has been previously performed, turn ignition off and wait at least 10 seconds before performing next DTC confirmation test.

NOTE: Never raise engine speed above 3600 RPM during DTC confirmation test. If engine speed limit is exceeded, retry procedure from step 2 .

NOTE: Before performing following procedure, confirm battery voltage is more than 11 volts at idle.

Start engine and warm it up to normal operating temperature.
Set voltmeter probes between engine ground and ECM harness connector F101 terminal No. 91 (Bank 1 HO2S1 signal) or No. 92 (Bank 2 HO2S1 signal).
Check one of the following with engine speed held at 2000 RPM constant under no load:
- Maximum voltage is more than 0.7 volt at least one time.
- Minimum voltage is less than 0.21 volt at least one time.
If voltage reading is not as specified, go to DIAGNOSTIC PROCEDURE .