3500 4x4 Pickup L6-359 5.9L DSL Turbo (1996)
Intake Air Temperature Sensor: Testing and Inspection
Sensor Test
Fig. 24 Air Temperature Sensor Location
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.
Fig. 25 Sensor Resistance (OHMS) - Inake Manifold Air Temperature Sensor
2. Test the resistance of the sensor with an input impedance (digital) volt-ohmmeter. The resistance (as measured across the sensor terminals) should
be less than 1340 ohms with the engine warm. Refer to 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.
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.