Confirmation Driving Pattern

Fig 1: Confirmation Driving Pattern

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
2. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DATA LIST / PRIMARY / O2S B1 S1 (or B2 S1).
3. Start the engine and warm it up with all the accessories switched OFF until the ECT becomes stable.
4. Run the engine at 2,500 to 3,000 rpm for about 3 minutes.

   HINT:

   Control the engine RPM so that the calculated catalyst temperature can be between 550 and 800°C (1,022 and 1,472°F). The calculated catalyst temperatures of bank 1 and bank 2 can be read by viewing CAT TEMP B1 S1 and CAT TEMP B2 S1 of the DATA LIST.

5. Confirm that heated oxygen sensor (bank 1 sensor 1 (OX1A) and bank 2 sensor 1 (OX2A)) have waveforms that are around 0.5 V during feedback to the ECM. Then check the waveform of the heated oxygen sensor (bank 1 sensor 2 (OX1B) and bank 2 sensor 2 (OX2B)) for the same waveforms (0.5 V during feedback).
   Fig 2: Catalyst Temperature Graph

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

If there is a malfunction in the catalyst, the waveform of the heated oxygen sensor (sensor 2) (OX1B, OX2B) is almost the same as that of the heated oxygen sensor (sensor 1) (OX1A, OX2A), which is shown.