Mazda 2003 MPV User Manual download pdf (Page 27)

MA28

Mazda ReferenceMA000

• PCM Adaptive Memory Produce Drive Mode

• EGR System Repair Verification Drive Mode

• HO2S heater, HO2S, and TWC Repair Verification Drive Mode

• EVAP System Repair Verification Drive Mode

The following systems are diagnosed with the Single Drive Mode:

• EGR system

• Oxygen sensor (HO2S)

• Oxygen sensor heater

• Catalytic converter (TWC)

• Fuel, misfire and evaporative (EVAP) system

IMPORTANT:

While performing the Drive Mode, always operate vehicle in a safe and lawful manner.

When observing monitor system status while driving, be sure to have another technician with

you, or record and inspect later.

NOTE:

i Vehicle speed and engine speed detected by PCM may differ from that indicated by

speedometer and tachometer. Use DATA PID to monitor vehicle speed.

If the OBD-II system inspection is not completed during Drive Mode, the following causes are

considered:

• The OBD-II system detects malfunction.

• The Drive Mode procedure is not completed correctly.

• Disconnecting the battery will reset memory. Do not disconnect battery after Drive Mode.

• Monitoring can be done by viewing the ON BOARD SYSTEM READINESS menu.

• OBD monitoring status can be confirmed with ignition switch operation. During KOEO,

the MIL illuminates for fail-light inspection for approximately 17 seconds. The OBD

monitoring status is confirmed after the fail-light inspection:

– If diagnosis is completed even one time, MIL will continue to illuminate.

– If diagnosis is not completed, MIL flashes for approximately 7 seconds, and then

illuminates until engine is started.

Mode 1 (PCM Adaptive Memory Produce Drive Mode)

z To perform this drive mode:

1. Start the engine and warm completely.

2. Verify the following conditions and correct if necessary:

– All accessory loads (A/C, headlights, blower fan, rear window defroster) are off.

– Initial ignition timing and idle speed are within specifications.

3. Perform no load racing at 2500 to 3500 rpm for 15 seconds or more, then idle engine for

60 seconds or more after cooling fan has stopped. If possible, monitor RPM PID for

engine speed during this procedure.

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Mazda 2003 MPV User Manual Page 27