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Home >> Mitsubishi >> 2002 >> Diamante ES >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Self-Diagnostics >> Verifying Repairs >> OBD-II Drive Cycles >> Catalytic Converter Monitor
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Catalytic Converter Monitor

This monitor applies to DTCs P0421 and P0431. Following conditions must be met during the test:

Monitor takes about 20 minutes to complete. To run monitor, use illustration. See Fig 1. Perform steps as follows:

  1. Remove all test equipment from vehicle and install all components and connectors that were removed or disconnected during testing.
  2. Start engine.
  3. Accelerate to 45 MPH.
  4. Travel 5 minutes or more while keeping speed at 45-60 MPH.
  5. Decelerate to 35-40 MPH.
  6. While keeping accelerator pedal opening degree constant, keep speed at 35-40 MPH for 90 seconds or more.
  7. Fully close throttle and decelerate for 10 seconds. Then, quickly accelerate until speed is 35-40 MPH. Then repeat steps  5 and  6 five more times.
  8. Return vehicle to shop and turn ignition off.

Fig 1: Running Catalytic Converter Monitor
G00169440Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
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