HEALTH CHECK HEALTH CHECK Health Check provides an overall view of vehicle status including telematics. Health Check will provide DCM (Telematics Transceiver) software version, PRL version, and applicable DTCs and fault codes related to telematics. (a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG). (c) Turn the Techstream on. (d) Click "Health Check".
HINT:
(e) Data is displayed under "Telematics". ![]()
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Toyota Avalon Service & Repair Manual > Sfi System: ECM Power Source Circuit
DESCRIPTION When the engine switch is turned on (IG), the battery voltage is applied to the IGSW terminal of the ECM. The output signal from the MREL terminal of the ECM causes a current to flow to the coil of the EFI-MAIN NO. 1 relay, closing the contacts and supplying power to terminals +B and +B2 ...