Possible Causes
- Navigation system road speed signal inconsistent with MOST road speed signal
- Speed signal broadcast on MOST is not received by the integrated audio module
NOTE:
- This DTC may be set when the vehicle is being transported
- This DTC may be set even though no fault condition is present and should be ignored unless the customer has reported a navigation system concern. Clear the DTC and retest. Verify the customer concern prior to diagnosis
- Check the anti-lock brake system control module for related DTCs and refer to the relevant DTC index. Test the power and ground supplies to integrated audio module. Using the manufacturer approved diagnostic system, perform a network integrity test. Check MOST ring for breaks. If no fault found, suspect integrated audio module internal fault