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Accessory Protocol Interface Module (APIM)

DTC Description Action
B1252:04 USB  Port: System Internal Failure GO to PINPOINT TEST R .
B1252:11 USB  Port: Circuit Short To Ground GO to PINPOINT TEST R .
B12B8:04 USB  Port #2: System Internal Failure
NOTE: This DTC  refers to USB  port #2 on the APIM  itself, which is not used.
INSPECT the APIM USB  port #2 for damage and remove any debris. CLEAR the DTCs  . REPEAT the self-test. If DTC  B12B8:04 is retrieved again, INSTALL a new APIM  . Refer to ACCESSORY PROTOCOL INTERFACE MODULE (APIM) .
B12B8:11 USB  Port #2: Circuit Short To Ground
NOTE: This DTC  refers to USB  port #2 on the APIM  itself, which is not used.
INSPECT the APIM USB  port #2 for damage and remove any debris. CLEAR the DTCs  . REPEAT the self-test. If DTC  B12B8:11 is retrieved again, INSTALL a new APIM  . Refer to ACCESSORY PROTOCOL INTERFACE MODULE (APIM) .
B1D79:01 Microphone Input: General Electrical Failure GO to PINPOINT TEST P .
B1D79:11 Microphone Input: Circuit Short To Ground GO to PINPOINT TEST P .
B1D79:12 Microphone Input: Circuit Short To Battery GO to PINPOINT TEST P .
B1D79:13 Microphone Input: Circuit Open GO to PINPOINT TEST P .
U0140:00 Lost Communication With Body Control Module: No Sub Type Information GO to PINPOINT TEST X .
U0155:00 Lost Communication With IPC  Module: No Sub Type Information GO to PINPOINT TEST Y .
U0257:00 Lost Communication With Front Controls/Display Interface Module: No Sub Type Information GO to PINPOINT TEST AC .
U0423:00 Invalid Data Received From Instrument Panel Cluster Control Module: No Sub Type Information REFER to INFORMATION CENTER - INSTRUMENTATION, MESSAGE CENTER, AND WARNING CHIMES to RETRIEVE and FOLLOW DTCs present in the IPC  .
U2100:00 Initial Configuration Not Complete: No Sub Type Information
  • This DTC  sets due to incomplete or incorrect PMI  procedures. CHECK the vehicle service history for recent service actions related to the APIM  .
  • If there have been recent service actions with the APIM  , REPEAT/PERFORM the APIM  programming as directed by the diagnostic scan tool. For more information, REFER to ACCESSORY PROTOCOL INTERFACE MODULE (APIM) PROGRAMMING .
  • If there have been no recent service actions, INSTALL a new APIM  to correct the failure to retain configuration data. REFER to ACCESSORY PROTOCOL INTERFACE MODULE (APIM) .
U2101:00 Control Module Configuration Incompatible: No Sub Type Information
  • This DTC  sets due to incomplete or incorrect PMI  procedures. CHECK the vehicle service history for recent service actions related to the APIM  .
  • If there have been recent service actions with the APIM  , REPEAT/PERFORM the APIM  programming as directed by the diagnostic scan tool. For more information, REFER to ACCESSORY PROTOCOL INTERFACE MODULE (APIM) PROGRAMMING .
  • If there have been no recent service actions, INSTALL a new APIM  to correct the failure to retain configuration data. REFER to ACCESSORY PROTOCOL INTERFACE MODULE (APIM) .
U3000:04 Control Module: System Internal Failure GO to PINPOINT TEST M .
U3000:41 Control Module: General Checksum Failure CLEAR the DTCs. REPEAT the self-test. If DTC  U3000:41 is still present, INSTALL a new APIM  . Refer to ACCESSORY PROTOCOL INTERFACE MODULE (APIM) .
U3000:42 Control Module: General Memory Failure CLEAR the DTCs. REPEAT the self-test. If DTC  U3000:42 is still present, INSTALL a new APIM  . Refer to ACCESSORY PROTOCOL INTERFACE MODULE (APIM) .
U3000:88 Control Module: Bus Off
NOTE: Network communication/message DTCs may result from intermittent concerns such as damaged wiring or low battery voltage occurrences. Additionally, vehicle repair procedures such as module reprogramming often set these DTCs  . To avoid repeat network concerns, INSPECT for damaged or corroded wiring at the APIM  . Test the vehicle battery, REFER to CHARGING SYSTEM . Replacing a module to resolve a network DTC  is unlikely to resolve the concern.
The module could not communicate on the network at a point in time. The fault is currently not present. CLEAR the DTC  . REPEAT the network test with the scan tool.
U3003:16 Battery Voltage: Circuit Voltage Below Threshold GO to PINPOINT TEST AD .
U3003:17 Battery Voltage: Circuit Voltage Above Threshold GO to PINPOINT TEST AE .
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