Test Procedure

-- Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK

Start diagnosis

Make sure the engine is at room temperature.

-- Disconnect the Fuel Temperature Sensor -G81- electrical harness connector.

Checking internal resistance

-- Measure the resistance of the 2 terminals of the Fuel Temperature Sensor -G81- connector(s).

Specified value: 1950 to 2200 Ω (+/- 25 Ω at about 20° C).

If the specified value was not obtained:

-- Replace the Fuel Temperature Sensor -G81-. Refer to the Repair Information.

If the specified value was obtained:

Checking the wiring

-- Remove the Engine Control Module -J623-. Refer to the Repair Information.

-- Using a multimeter, measure the resistance between the terminals of the Fuel Temperature Sensor -G81-.

Fuel Temperature Sensor -G81- electrical harness connector terminal	Engine Control Module -J623- electrical harness connector T60 terminals
1	24
2	39

Specified value: 1.5 Ω Max.

If the specification was not obtained:

-- Check the wires for high resistance, a short circuit to each other, a short to battery voltage, and a short to ground.

-- Check the electrical harness connector for damage, corrosion, loose or broken terminals.

-- Repair as necessary.

If the specified value was obtained:

-- Replace the Engine Control Module -J623-. Refer to the service information for removal and installation procedures.