Performing this confirmation pattern will activate the catalyst monitor This is very useful for verifying the completion of a repair

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Vehicle Speed

Between 64 km/h and 113 km/h (40 mph and 70 mph)

Idling _. Ignition Switch OFF

NOTICE:

This test will not be completed if the vehicle is driven at absolutely constant speed such as with cruise control activated.

10 minutes

Time

(Note: Even if vehicle stops during driving pattern, test can be resumed)

A115372E26

READINESS TESTS

MISFIRE MON

AVAIL

FUEL SYS MON

AVAIL

COMP MON

AVAIL

CAT EVAL

INCMPL -

HTD CAT EVAL

N/A

EVAP EVAL

INCMPL

2nd AIR EVAL

N/A

A/C EVAL

N/A

02S EVAL

INCMPL

02S HTR EVAL

INCMPL

EGR EVAL

(a) Connect the intelligent tester to the DLC3.

(b) Turn the ignition switch ON.

(e) Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DATA LIST / USER DATA / CAT CMPL.

(f) Check that CAT CMPL is INCMPL (incomplete).

(g) Start the engine and warm it up.

(h) Drive the vehicle at between 64 km/h and 113 km/h (40 mph and 70 mph) for at least 10 minutes.

(i) Note the state of the Readiness Tests items. Those items will change to COMPL (complete) as CAT CMPL monitor operates.

(j) On the tester, select the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO /

PENDING CODES and check if any DTCs (any pending DTCs) are set.

HINT:

If CAT CMPL does not change to COMPL, and any pending DTCs fail to set, extend the driving time.

CONDITIONING FOR SENSOR TESTING

HINT:

Perform the operation with the engine speeds and time durations described below prior to checking the waveforms of the A/F and HO2 sensors. This is in order to activate the sensors sufficiently to obtain the appropriate inspection results.

Engine Speed 3,000 rpm

2,000 rpm

Idling _ Ignition Switch OFF

Warming up

At least 3 minutes

Time

2 seconds Check

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(a) Connect the intelligent tester to the DLC3.

(b) Start the engine and warm it up with all the accessories switched OFF, until the engine coolant temperature stabilizes.

(c) Run the engine at an engine speed of between 2,500 rpm and 3,000 rpm for at least 3 minutes.

(d) While running the engine at 3,000 rpm and 2,000 rpm alternating at 2 second intervals, check the waveforms of the A/F and HO2 sensors using the tester.

HINT:

• If either voltage output of the Air-Fuel Ratio (A/F) or Heated Oxygen (HO2) sensor does not fluctuate, or there is a noise in the waveform of either sensor, the sensor may be malfunctioning.

• If the voltage outputs of both the sensors remain lean or rich, the air-fuel ratio may be extremely lean or rich. In such cases, perform the following A/F CONTROL using the intelligent tester.

• If the Three-Way Catalytic Converter (TWC) has deteriorated, the HO2 sensor (located behind the TWC) voltage output fluctuates up and down frequently, even under normal driving conditions (active air-fuel ratio control is not performed).

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Responses

  • gilly
    How to activate catalyst monitor?
    8 years ago

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