DA: Intake Air Temperature (IAT)/Engine Coolant Temperature (ECT)/EngineOil Temperature (EOT) Sensors Introduction

DA: Pinpoint Tests See: DA: Intake Air Temperature (IAT)/Engine Coolant Temperature (ECT)/EngineOil Temperature (EOT) Sensors - Pinpoint Test

Note

This Pinpoint Test is intended to diagnose the following:

• Intake air temperature (IAT) sensor (12A697)
• Integrated intake air temperature (IAT) sensor (12B579)
• Engine coolant temperature (ECT) sensor (12A648)
• Engine oil temperature (EOT) sensor (12A648)
• Harness circuits: IAT, ECT, EOT and SIG RTN
• Powertrain control module (PCM) (12A650)

The term "applicable" is used in this pinpoint test and refers to the temperature sensor indicated by the DTC. Example: ECTV, IATV, EOTV.

Tables and Graphs

Note: Engine coolant temperature must be greater than 10°C (50°F) to pass the KOEO Self-Test and greater than 82°C (180°F) to pass the KOER Self-Test. To accomplish this, the engine must be at normal operating temperature.

Ambient temperature must be above 10°C (50°F) to receive acceptable input from the intake air temperature (IAT) sensor.

Engine oil temperature must be greater than 10°C (50°F) to pass the KOEO Self-Test and greater than 66°C (150°F) to pass the KOER Self-Test.
Voltage values were calculated for VREF = 5.0 volts. These values can vary 15 percent due to sensor and VREF variations.