Cressida L6-3.0L DOHC (7M-GE) (1989)
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Malfunction Indicator Lamp: Description and Operation
The electronic control unit (ECU) for the TCCS, contains a self-diagnostic system that will store failure codes associated with the fuel and emission
control systems. The ECU will analyze signals from various sensors and actuators and detect any system malfunctions. An instrument panel "CHECK
ENGINE" lamp will light to indicate when a system defect occurs. The technician can then extract these failure codes, follow the testing procedures and
use the information to repair the malfunction.
