Pickup 4WD L4-2559cc 2.6L SOHC (4ZE1) (1988)
Malfunction Indicator Lamp: Description and Operation
"Check Engine" Light
This system incorporates self-diagnostic capability that is monitored via a dash mounted "Check Engine" light. When the system detects a fault in a
monitored component and/or circuit, the light will come on and stay on (while the engine is running), alerting the driver to seek service. With
intermittent problems, the light may come on and then go out, but a trouble code will be stored in ECM memory if correct parameters are met. The
technician can then extract trouble codes from the ECM that will aid in the performance of efficient troubleshooting and repair.