Circuit Description
WARNING: This page is about a different car, the 2003 Toyota Camry. However, it is still accessible from the selected car via links, so may be relevant.
For circuit description, see Fig 1. DTC P2195 detecting condition is when A/F sensor voltage is more than 3.8 V and continues for 10 seconds or more. DTC P2196 detecting condition is when A/F sensor voltage is less than 2.8 V and continues for 10 seconds or more.
- After confirming DTCs P2195 and P2196 use the OBD II scan tool or the hand-held tester to confirm voltage output of A/F sensor (AFS B1 S1) from the DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL.
- The A/F sensor's output voltage and the short-term fuel trim value can be read using the OBD II scan tool or the hand-held tester.
- The ECM controls the voltage of the AF1A+ and AF1A- terminals of the engine control module (ECM) to a fixed voltage. Therefore, it is impossible to confirm the A/F sensor output voltage without the OBD II scan tool or the hand-held tester.
- The OBD II scan tool (excluding hand-held tester) displays the one fifth of the A/F sensor output voltage which is displayed on the hand-held tester.