Manifold Air Temperature (MAT) Sensor Test
- Disconnect wire harness connector from MAT sensor. See Fig 1
. Test resistance of sensor with a high impedance digital ohmmeter. Resistance should be less than 1000 ohms with engine warm. Replace sensor if resistance is not within range and temperature specified. See TEMPERATURE & RESISTANCE VALUES (CTS & MAT SENSOR)
table.
Courtesy of CHRYSLER MOTORS.
- Test resistance of wire harness between ECU wire harness connector terminal D-3 and sensor connector terminal. Repeat test with terminal C-8 at ECU and sensor connector terminal. Repair wire harness if an open circuit or resistance of greater than one ohm is indicated.