Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Ambient Temperature Sensor Test
- Turn the ignition OFF.
- Disconnect and isolate the battery negative cable (Fig. 3).
- Disconnect the ATS harness connector.
- Measure the resistance of the ATS using the following min/max values:
- 0° C (32° F)
Sensor Resistance = 29.33 - 35.99 Kilohms.
- 10° C (50° F)
Sensor Resistance = 17.99 - 21.81 Kilohms.
- 20° C (68° F)
Sensor Resistance = 11.37 - 13.61 Kilohms.
- 25° C (77° F)
Sensor Resistance = 9.12 - 10.86 Kilohms.
- 30° C (86° F)
Sensor Resistance = 7.37 - 8.75 Kilohms.
- 40° C (104° F)
Sensor Resistance = 4.90 - 5.75 Kilohms.
The sensor resistance should read between these min/max values. If the resistance values are not OK, replace the Sensor.
- 0° C (32° F)
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.