Diagnostic Test
WARNING: This page is about a different car, the 2020 Jeep Renegade. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK FOR AN ACTIVE DTC NOTE:
When servicing the Adaptive Cruise Control (ACC) System, try to determine the operating conditions when the concern took place. Heavy rain, snow, ice, fog or an excessively high ambient temperature can cause the ACC system to become unavailable. This is considered normal. Under such conditions, no repair is necessary.
- With the scan tool, read ACC Module DTCs and record on the repair order.
Is the DTC active?
Yes
- Go To 2
No
- Make sure the lens is free of dirt, damage, and other obstructions and clean/repair as necessary. If no problems are found, test complete.
- Perform the ADAPTIVE CRUISE CONTROL VERIFICATION TEST. Refer to ADAPTIVE CRUISE CONTROL (ACC) VERIFICATION TEST .
- With the scan tool, read ACC Module DTCs and record on the repair order.
- VERIFY AMBIENT TEMPERATURE READING
- With the scan tool, read PCM ambient air temperature.
Is the ambient air temperature reading 115°C (239°F) or above?
Yes
- The Adaptive Cruise Control (ACC) Module has detected the ambient temperature above its valid operating range. Once the temperature has decreased below 85°C (185°F), ACC operation will be restored.
- Perform the ADAPTIVE CRUISE CONTROL VERIFICATION TEST. Refer to ADAPTIVE CRUISE CONTROL (ACC) VERIFICATION TEST .
No
- Using the schematics as a guide, check the ACC Module pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits and repair as necessary. If no problems are found, replace and program the ACC Module in accordance with the Service Information. Refer to MODULE, ADAPTIVE CRUISE CONTROL (ACC), REMOVAL AND INSTALLATION .
- Perform the ADAPTIVE CRUISE CONTROL VERIFICATION TEST. Refer to ADAPTIVE CRUISE CONTROL (ACC) VERIFICATION TEST .
- With the scan tool, read PCM ambient air temperature.