Testing If Display Approx. 140.0° C
-- Disconnect the Engine Coolant Temperature (ECT) Sensor (on radiator) -G83- electrical harness connector -1-.
-- Turn the ignition ON.
If indication jumps to approx. -40.0° C:
-- Replace the Engine Coolant Temperature (ECT) Sensor (on radiator) - G83- Refer to the Repair Information.
-- Switch ignition OFF.
If indication remains at approx. 140.0° C:
Checking wiring
If the manufacturers test box is being used. Perform the following step.
-- Install the test box.
If the manufacturers test box is not being used. Perform the following step.
-- Remove the Engine Control Module (ECM) -J623-. Refer to the Repair Information.
-- Using a multimeter, check the Engine Coolant Temperature (ECT) Sensor (on radiator) - G83- electrical harness connector terminals to the Engine Control Module (ECM) -J623- electrical harness connector T94 terminals for an open circuit according to the wiring diagram.
| Engine Coolant Temperature (ECT) Sensor (on radiator) - G83- electrical harness connector terminals | Engine Control Module (ECM) -J623- electrical connector T94 terminals or test box socket |
|---|---|
| 1 | 26 |
| 2 | 12 |
Specified value: 1.5 Ω Max.
If the specification was not obtained:
-- Check the wiring for high resistance, an open or a short to voltage or ground.
-- Check the electrical harness connector for damage, corrosion, loose or broken terminals.
-- If necessary, repair the faulty wiring connection.
If no malfunction is detected in the wiring and the voltage supply was Not OK:
-- Replace the Engine Control Module (ECM) -J623-. Refer to the Repair Information.
Final procedures
After repair work, the following work steps must be performed in the mentioned sequence:
- Check the DTC memory. Refer to DIAGNOSTIC MODE 03 - READ DTC MEMORY .
- If necessary, erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .
- If the DTC memory was erased, generate readiness code. Refer to READINESS CODE .