Function Inspection

WARNING: This page is about a different car, the 2017 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.

Connect the M-MDS to the DLC-2.
Switch the ignition ON (engine off).
Display the PID IAT. (See ON-BOARD DIAGNOSTIC TEST .) (See PCM INSPECTION .)
Compare the voltage and temperature indications for the PID IAT with the standard in the table indicated below.

If they do not match the standard, replace the PCM. (See PCM REMOVAL/INSTALLATION .)
If they match the standard, perform the resistance inspection. (See RESISTANCE INSPECTION .)

Standard

IAT
V	°C {°F}
Approx. 2.70	20 {68}
Approx. 1.80	40 {104}
Approx. 1.20	60 {140}