RAM 2500 Truck 2WD L6-359 5.9L DSL Turbo VIN D FI (1997)
Intake Air Temperature Sensor: Testing and Inspection
Sensor Test
NOTE: To perform a complete test of this sensor and its circuitry, refer to DRB scan tool and appropriate Powertrain Diagnostics Procedures manual.
To test the sensor only, refer to the following:
1. Disconnect the wire harness connector from the intake manifold air temperature sensor. The sensor is located on the top of the intake manifold and
to the rear of the air heater.
2. Test the resistance of the sensor with an input impedance (digital) volt-ohmmeter. The resistance (as measured across the sensor terminals) should
be as shown in the Sensor Resistance (OHMS)-Intake Manifold Air Temperature resistance chart. Replace the sensor if it is not within the range of
resistance specified in the chart.
Sensor Resistance (OHMS)-Intake Manifold Air Temperature resistance Chart
3. Test the resistance of the wire harness. Do this between the powertrain control module (PCM) wire harness connector terminal A-15 and the
sensor connector terminal. Also check between PCM terminal A-4 (sensor return) to the sensor connector terminal. Repair the wire harness as
necessary if the resistance is greater than 1 ohm.
