Monitors, Trips, Drive Cycles and Readiness Codes

1998 Mazda 626 LX L4-2.0L DOHCSECTION Monitors, Trips, Drive Cycles and Readiness Codes



OBD II Drive Mode
To complete the OBD II system check, following drive mode procedure must be performed.

CAUTION: When this procedure is carried out, be sure to drive the vehicle at the lawful speed and pay attention to the other vehicles. When the NGS tester is used to check the vehicle speed while driving, be sure to have another worker on the passenger seat, or record the data in the tester by the using the "PID/DATA MONITOR AND RECORD" function and check later.

NOTE:
- Vehicle speed and engine speed detected by the PCM may differ from that indicated by the speedometer and the tachometer. Check the vehicle speed and engine speed during driving mode by using the NGS tester.
- If the OBD II system check is not completed while the drive mode procedure carried out, the OBD II system may have detected the malfunction
- The vehicle should cold soak for at least 8 hours before performing the evaporative system check.

Procedure
1. Connect NGS tester to data link connector.
2. Start engine.
3. Drive vehicle and accelerate to 66 km/h (40 mph) within 20 seconds.
4. Fix throttle opening and drive vehicle at 56-73 km/h (35-45 mph) for 340 seconds.
5. Accelerate to 80-93 km/h (50-58 mph) (MTX), 80-96 km/h (50-60 mph) (ATX) within 10 seconds.
6. Fix throttle opening and drive vehicle for at least 2 minutes.
7. Return to idle 20 seconds.
8. Stop vehicle and perform OBD II system check by using "ON BOARD SYSTEM READINESS" mode of generic OBD II function.
9. If supported test is not complete, repeat steps 2 to step 8.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.