Fault Code 15

Fault Code 15:

1. Remove ATC control, then disconnect electrical connector and measure resistance between pins 7 and 20. Resistance should measure 5000-41000 ohms with temperature between 30 and 90°F.
- If resistance is not within specifications, proceed to step 2.
- If resistance is within specifications, replace ATC control.
2. Remove in-vehicle sensor and measure resistance across pins 1 and 4.
- If resistance is not within specifications, replace in-vehicle sensor.
- If resistance is within specifications, check continuity between ATC control pin 20 and in-vehicle sensor pin 1 and between ATC control pin 7 and in-vehicle sensor pin 4 and correct as necessary.