Sensor Test

INTAKE MANIFOLD AIR TEMPERATURE SENSOR

To perform a complete test of the intake manifold air temperature sensor and its circuitry, refer to DRB tester and appropriate Powertrain Diagnostics Procedures. To test the sensor only, refer to the following:

Sensor Resistance (Ohms)-coolant Temperature Sensor/Intake Air Temperature Sensor:

1 Disconnect wire harness connector from intake manifold air temperature sensor (Fig. 31).

2 Test resistance of sensor with an input impedance (digital) volt-ohmmeter. The resistance (as measured across the sensor terminals) should he as shown in the Coolant Temperature Sensor/Intake Air Temperature Sensor resistance chart. Replace sensor if it is not within range of resistance specified in chart below.

3 Test resistance of wire harness. Do this between PCM wire harness connector A-15 and sensor connector terminal. Also check between PCM connector A-4 to sensor connector terminal. Repair wire harness as necessary if resistance is greater than 1 ohm.