Intake Air Temperature Sensor

Intake Air Temperature (IAT) sensor uses a 5-volt reference voltage during engine operation. To check IAT signal voltage, backprobe between signal terminal and ground with engine running. See WIRING DIAGRAMS article. To check sensor resistance, disconnected sensor and measure resistance between sensor terminals. For specifications, see ECT & IAT SENSOR SPECIFICATIONS  table. For additional testing information, see TEST DA under SYSTEM TESTS in SELF-DIAGNOSTICS - VILLAGER article.