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Home >> Toyota >> 1999 >> 4Runner Base, RWD, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Trouble Shooting - No Codes >> INTERMITTENTS >> Heating Method >> Component Testing

Component Testing

Heat suspected component with a hair dryer while checking for a malfunction to occur. DO NOT apply heat directly to components in Engine Control Module (ECM). DO NOT heat any component to more than 140°F (60°C).