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.
TEMPERATURE SENSOR VOLTAGE AND RESISTANCE SPECIFICATIONS
Pinpoint Test Schematics and Connectors
LS6/LS8 (If equipped)
Focus, 2.0L Cougar
Note: On some applications the integrated IAT/MAF sensor connector is located inside the air cleaner assembly.