Testing If Display Is Approx. - 40.0° C
-- Disconnect the Engine Coolant Temperature (ECT) Sensor -G62 or 83- electrical harness connector.
-- Using a jumper wire, connect the Engine Coolant Temperature (ECT) Sensor -G62 or 83- electrical harness connector terminals 1 to 2.
-- Turn the ignition switch ON
-- Check the value indicated on the scan tool display.
-- Turn the ignition switch OFF
If the value jumps to approx. 140.0° C
-- Replace the Engine Coolant Temperature (ECT) Sensor -G62 or 83- Refer to the Repair Information.
If indication remains at approx. - 40.0° C: