Diagnostic Test
WARNING: This page is about a different car, the 2017 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK FOR AN ACTIVE DTC NOTE:
To help in the service of the Adaptive Cruise Control (ACC) System, it is recommended speaking to the customer to find out what type of environment they were driving in when the cruise concern took place. Heavy rain, snow, ice, and fog can cause the ACC system to become unavailable. This is considered normal operation and 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 STANDARD PROCEDURE .
- 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 85°C (185°F) or above?
Yes
- The Adaptive Cruise Control (ACC) Module has detected the ambient temperature above 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 STANDARD PROCEDURE .
No
- Replace and program the Adaptive Cruise Control (ACC) Module in accordance with the Service Information. Refer to MODULE, ADAPTIVE CRUISE CONTROL (ACCM), REMOVAL .
- Perform the ADAPTIVE CRUISE CONTROL VERIFICATION TEST. Refer to STANDARD PROCEDURE .
- With the scan tool, read PCM ambient air temperature.