Diagnostic Test
WARNING: This page is about a different car, the 2018 Fiat 500X. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK FOR AN ACTIVE DTC
- With the scan tool, read ACC Module DTCs and record on the repair order.
Is the DTC active?
Yes
- Go To 2
No
- Erase the DTC and verify proper operation of the ACC system.
- 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.
- ACC MODULE SOFTWARE UPDATE
- With the scan tool, update the controller software.
- With the scan tool, erase ACC Module DTCs.
- Turn the ignition off.
- Turn the ignition on.
- With the scan tool, read ACC Module DTCs.
Did the DTC return?
Yes
- 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 (ACCM), REMOVAL AND INSTALLATION .
- Perform the ADAPTIVE CRUISE CONTROL VERIFICATION TEST. Refer to ADAPTIVE CRUISE CONTROL (ACC) VERIFICATION TEST .
No
- Test complete.
- Perform the ADAPTIVE CRUISE CONTROL VERIFICATION TEST. Refer to ADAPTIVE CRUISE CONTROL (ACC) VERIFICATION TEST .