Checking Wiring

-- Remove the Engine Control Module - J623-. Refer to appropriate service information.

-- Using a Multimeter, Check the Exhaust Pressure Sensor 1 -G450- or Differential Pressure Sensor -G505- electrical harness connector to the Engine Control Module - J623- electrical harness connector T94 for an open circuit.

Specified value: 1.5 Ω Max.

If the specified value was Not obtained:

-- Check the wiring connection for an open circuit, short circuit to Battery positive or Ground

-- Check the wiring connection for damage, corrosion, loose or broken terminals.

-- If necessary, repair the faulty wiring connection and replace any open fuses.

-- Go to Final Procedures 

If the specified value was obtained:

-- If no faults were found Replace the Engine Control Module - J623-. Refer to appropriate service information.

-- Go to Final Procedures