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Home >> Toyota >> 1998 >> Tercel Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Tests W/Codes >> Self-Diagnostic Tests >> DTC P0300: Random/Multiple Misfire Detected >> Test Drive Confirmation
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Test Drive Confirmation

  1. Connect Toyota or OBD-II scan tool. See Figure. Record any DTCs and freeze frame data. Switch scan tool to CHECK mode (Toyota scan tool only). Drive vehicle several times with engine speed, load and its surrounding range shown with ENGINE SPD, CALC LOAD in freeze frame data or MISFIRE RPM and MISFIRE LOAD in scan tool data list.
  2. Drive vehicle at specified engine speeds. See DRIVING PATTERN  table. If using OBD-II scan tool, turn ignition off after symptom is simulated the first time, then repeat test drive again. If a misfire is detected, a DTC will set and misfire will be indicated in freeze frame data. Turn ignition off and wait a minimum of 5 seconds.
DRIVING PATTERN

RPM (1) Minutes
Idling 3 1/2
1000 3
2000 1 1/2
3000 1
(1) Minimum specification given.
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