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.
Diagnostic Test
- READ AND RECORD DTCS AND ENVIRONMENTAL DATA - ERASE DTCS AND CHECK FOR DTC TO RETURN
- With the scan tool, read DTCs in all Electronic Control Units (ECUs) and record on the repair order.
- With the scan tool, run a vehicle Scan Report, or record the Environmental Data related to the DTCs.
- With the scan tool, erase all DTCs.
- Turn the ignition off for a minimum of 10 seconds.
- Turn the ignition on.
- Using the recorded Environmental Data and the When Monitored Conditions, operate the vehicle in the conditions that set the DTC.
- With the scan tool, read DTCs.
Did the DTC return?
Yes
- Go To 2
No
- Perform the TESTING FOR AN INTERMITTENT CONDITION diagnostic procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION .
- CHECK FOR APPLICABLE SOFTWARE UPDATES AND SERVICE BULLETINS
- With a scan tool, check all electronic control modules for software updates that are related to the customer concern.
- Check for service bulletins that are related to the customer concern.
Were any software updates or service bulletins applicable to the customer concern?
Yes
- Perform the service procedure as necessary.
- Perform the CENTRAL ADAS DECISION MODULE (CADM) - LOW LEVEL - VERIFICATION TEST. Refer to CENTRAL ADAS DECISION MODULE (CADM) - LOW LEVEL - VERIFICATION TEST .
No
- Go To 3
- CHECK FOR RELATED DTCS SET IN OTHER MODULES
- Refer to the saved DTC information recorded on the repair order.
Were any related ECU software or configuration DTCs set in other modules?
Yes
- Perform the appropriate diagnostic procedures in accordance with the Service Information.
- Perform the CENTRAL ADAS DECISION MODULE (CADM) - LOW LEVEL - VERIFICATION TEST. Refer to CENTRAL ADAS DECISION MODULE (CADM) - LOW LEVEL - VERIFICATION TEST .
No
- Replace the Central ADAS Decision Module (CADM) in accordance with the Service Information. Refer to MODULES, REMOVAL AND INSTALLATION .
- Perform the CENTRAL ADAS DECISION MODULE (CADM) - LOW LEVEL - VERIFICATION TEST. Refer to CENTRAL ADAS DECISION MODULE (CADM) - LOW LEVEL - VERIFICATION TEST .
- Refer to the saved DTC information recorded on the repair order.
Use the Manual With the Right Hardware
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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.
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