Pinpoint Test Al: DTC U0238 Or DTC U0238:00

WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, and 2011 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Only the non-navigation FDIM can set DTC U0238. Disregard the pinpoint test steps for the FDIM if the concern is on a vehicle with navigation.

AL1 CHECK THE ACM AND FDIM DTCs
NOTE: If new modules were installed prior to the DTC being set, the module configuration may be incorrectly set during Programmable Module Installation (PMI) or the PMI may not have been carried out.
- Clear the APIM and FDIM DTCs.
- Ignition OFF.
- Ignition ON.
- Wait at least 10 seconds.
- Repeat the APIM and FDIM self-tests.
- Is DTC U0238 or DTC U0238:00 still present?
- Yes : GO to AL2.
- No : The system is operating correctly at this time. The DTC may have been set due to an intermittent fault in the network wiring.
AL2 VERIFY THE CUSTOMER CONCERN
- Ignition ON.
- Verify that there is an observable symptom present.
- Is an observable symptom present?
- Yes : GO to AL3.
- No : The system is operating correctly at this time. The DTC may have been set due to an intermittent fault in the network wiring. CHECK the MS-CAN wiring between the audio DSP module and the module in question for an intermittent fault.
AL3 CHECK THE COMMUNICATION NETWORK
- Ignition ON.
- Carry out the network test using the scan tool.
- Does the audio DSP module pass the network test?
- Yes : GO to AL4.
- No : REFER to MODULE COMMUNICATIONS NETWORK -- FUSION, MILAN & MKZ article.
AL4 CHECK FOR BATTERY VOLTAGE OUT-OF-RANGE DTCs
- Carry out the self-test for the following modules:
  - ACM
  - Audio DSP module
  - FDIM
- Is DTC B1316, B1317, U3003:16 or U3003:17 recorded in any module?
- Yes : REFER to DTC CHARTS in this service information.
- No : INSTALL a new audio DSP module. REFER to AUDIO DIGITAL SIGNAL PROCESSING (DSP) MODULE in this service information. CLEAR the ACM and FDIM DTCs. REPEAT the ACM and FDIM self-tests.
  If DTC U0238:00 is still present in the ACM, INSTALL a new ACM. REFER to AUDIO CONTROL MODULE (ACM) - FUSION, MILAN or AUDIO CONTROL MODULE (ACM) - MKZ in this service information. TEST the system for normal operation. If DTC U0238:00 is still present in the FDIM, INSTALL a new FDIM. REFER to FRONT DISPLAY INTERFACE MODULE (FDIM) - FUSION, MILAN or FRONT DISPLAY INTERFACE MODULE (FDIM) - MKZ in this service information. TEST the system for normal operation.