DTC Charts
NOTE:
Network DTCs (U-codes) are often a result of intermittent concerns such as faulty wiring or low battery voltage occurrences. Additionally, vehicle service procedures such as module reprogramming will often set network DTCs. Replacing a module to resolve a network DTC is unlikely to resolve the concern. To prevent repeat network DTC concerns, inspect all network wiring, especially connectors. Test the vehicle battery, refer to BATTERY, MOUNTING AND CABLES
.
NOTE:
DTCs listed as "on-demand" set during the scan tool on-demand self-test. On-demand DTCs are hard fault (always present) conditions.
DTCs listed as "continuous" are continuous memory DTCs (CMDTCs) which are set when a fault is present during normal module operation. These DTCs may either be intermittently present (which will clear) or may be hard-fault (always present) conditions.
COMMUNICATION NETWORK DTC CHART
| DTC | Description | Source | How Set | Action |
|---|---|---|---|---|
| U0001 | High Speed CAN Communication Bus | ABS module | Continuous On-demand |
The module could not communicate on the network at a point in time. The fault is not currently present (the module had to communicate with the scan tool to report this DTC). CLEAR the DTC. REPEAT the network test with the scan tool. |
| U0100 | Lost Communication With ECM/PCM | ABS module | Continuous On-demand |
CLEAR the DTC. REPEAT the network test. If the DTC returns, go to Pinpoint Test b . |
| U0100 | Lost Communication With ECM/PCM | Instrument cluster (IC) | Continuous | REFER to INSTRUMENT CLUSTER (IC), MESSAGE CENTER, AND WARNING CHIMES . |
| U0100 | Lost Communication With ECM/PCM | Restraints control module (RCM) | Continuous On-demand |
REFER to ANTI-THEFT - PASSIVE ANTI-THEFT SYSTEM (PATS) . |
| U0121 | Lost Communication With Anti-Lock Brake System (ABS) Control Module | IC | Continuous | REFER to INSTRUMENT CLUSTER (IC), MESSAGE CENTER, AND WARNING CHIMES . |
| U0140 | Lost Communication With Body Control Module | ABS module | Continuous On-demand |
CLEAR the DTC. REPEAT the network test. If the DTC returns, go to Pinpoint Test b . |
| U0140 | Lost Communication With Body Control Module | Audio control module (ACM) | Continuous | CLEAR the DTC. REPEAT the network test. If the DTC returns, go to Pinpoint Test k . |
| U0140 | Lost Communication With Body Control Module | HVAC module | Continuous On-demand |
CLEAR the DTC. REPEAT the network test. If the DTC returns, go to Pinpoint Test l . |
| U0140 | Lost Communication With Body Control Module | Front controls interface module (FCIM) | Continuous | CLEAR the DTC. REPEAT the network test. If the DTC returns, go to Pinpoint Test g . |
| U0140 | Lost Communication With Body Control Module | Front display interface module (FDIM) | Continuous | CLEAR the DTC. REPEAT the network test. If the DTC returns, go to Pinpoint Test h . |
| U0140 | Lost Communication With Body Control Module | IC | Continuous | CLEAR the DTC. REPEAT the network test. If the DTC returns, go to Pinpoint Test c . |
| U0151 | Lost Communication With Restraints Control Module | IC | Continuous | CLEAR the DTC. REPEAT the network test. If the DTC returns, go to Pinpoint Test c . |
| U0151 | Lost Communication With Restraints Control Module | Occupant classification system module (OCSM) | Continuous On-demand |
CLEAR the DTC. REPEAT the network test. If the DTC returns, go to Pinpoint Test d . |
| U0154 | Lost Communication With Restraints Occupant Classification System (OCS) Module | RCM | Continuous On-demand |
CLEAR the DTC. REPEAT the network test. If the DTC returns, go to Pinpoint Test e . |
| U0155 | Lost Communication With Instrument Panel Cluster (IC) Control Module | Accessory protocol interface module (APIM) | Continuous | CLEAR the DTC. REPEAT the network test. If the DTC returns, go to Pinpoint Test f . |
| U0155 | Lost Communication With Instrument Panel Cluster (IC) Control Module | ACM | Continuous | CLEAR the DTC. REPEAT the network test. If the DTC returns, go to Pinpoint Test k . |
| U0155 | Lost Communication With Instrument Panel Cluster (IC) Control Module | FCIM | Continuous | DISREGARD this DTC. This DTC sets when the FCIM is missing compass data messages from the IC. This vehicle is not equipped with a compass. |
| U0155 | Lost Communication With Instrument Panel Cluster (IC) Control Module | FDIM | Continuous | CLEAR the DTC. REPEAT the network test. If the DTC returns, go to Pinpoint Test h . |
| U0155 | Lost Communication With Instrument Panel Cluster (IC) Control Module | Smart junction box (SJB) | Continuous On-demand |
CLEAR the DTC. REPEAT the network test. If the DTC returns, go to Pinpoint Test j . |
| U0159 | Lost Communication With Parking Assist Control Module (PAM) | ACM | Continuous | DISREGARD this DTC. The vehicle is not equipped with PAM. |
| U0164 | Lost Communication With HVAC Control Module (EATC) | FDIM | Continuous | CLEAR the DTC. REPEAT the network test. If the DTC returns, go to Pinpoint Test h . |
| U0164 | Lost Communication With HVAC Control Module (EATC) | IC | Continuous | CLEAR the DTC. REPEAT the network test. If the DTC returns, go to Pinpoint Test c . |
| U0184 | Lost Communication With Radio (ACM) | APIM | Continuous | CLEAR the DTC. REPEAT the network test. If the DTC returns, go to Pinpoint Test f . |
| U0184 | Lost Communication With Radio (ACM) | FCIM | Continuous | CLEAR the DTC. REPEAT the network test. If the DTC returns, go to Pinpoint Test g . |
| U0184 | Lost Communication With Radio (ACM) | FDIM | Continuous | CLEAR the DTC. REPEAT the network test. If the DTC returns, go to Pinpoint Test h . |
| U0184 | Lost Communication With Radio (ACM) | Satellite digital audio receiver system (SDARS) module | Continuous | CLEAR the DTC. REPEAT the network test. If the DTC returns, go to Pinpoint Test i . |
| U0193 | Lost Communication With Satellite Digital Audio Receiver System (SDARS) | ACM | Continuous | CLEAR the DTC. REPEAT the network test. If the DTC returns, go to Pinpoint Test k . |
| U0193 | Lost Communication With Satellite Digital Audio Receiver System (SDARS) | FDIM | Continuous | CLEAR the DTC. REPEAT the network test. If the DTC returns, go to Pinpoint Test h . |
| U0197 | Lost Communication With Telephone Control Module [APIM] | ACM | Continuous | CLEAR the DTC. REPEAT the network test. If the DTC returns, go to Pinpoint Test k . |
| U0197 | Lost Communication With Telephone Control Module [APIM] | FDIM | Continuous | CLEAR the DTC. REPEAT the network test. If the DTC returns, go to Pinpoint Test h . |
| U0197 | Lost Communication With Telephone Control Module [APIM] | SDARS module | Continuous | CLEAR the DTC. REPEAT the network test. If the DTC returns, go to Pinpoint Test i . |
| U0255 | Lost Communication With Front Control Interface Module | ACM | Continuous | CLEAR the DTC. REPEAT the network test. If the DTC returns, go to Pinpoint Test k . |
| U0255 | Lost Communication With Front Control Interface Module | APIM | Continuous | CLEAR the DTC. REPEAT the network test. If the DTC returns, go to Pinpoint Test f . |
| U0256 | Lost Communication With Front Display Interface Module | ACM | Continuous | CLEAR the DTC. REPEAT the network test. If the DTC returns, go to Pinpoint Test k . |
| U0256 | Lost Communication With Front Display Interface Module | APIM | Continuous | CLEAR the DTC. REPEAT the network test. If the DTC returns, go to Pinpoint Test f . |
| U0401 | Invalid Data Received From ECM/PCM | ABS module | Continuous On-demand |
RETRIEVE and FOLLOW DTCs from the PCM. REFER toMULTIFUNCTION ELECTRONIC MODULES for a list of all DTCs. |
| U0401 | Invalid Data Received From ECM/PCM | RCM | Continuous On-demand |
RETRIEVE and FOLLOW DTCs from the PCM. REFER toMULTIFUNCTION ELECTRONIC MODULES for a list of all DTCs. |
| U0455 | Invalid Data Received From Restraints Occupant Classification System Module | ABS module | Continuous On-demand |
RETRIEVE and FOLLOW DTCs from the PCM. REFER toMULTIFUNCTION ELECTRONIC MODULES for a list of all DTCs. |
| U2023 | Fault Received From External Node | IC | Continuous | U2023 is set when a module receives invalid network data from another module with a faulted input. RETRIEVE and REPAIR all non-network DTCs in the other modules on the network. REFER to MULTIFUNCTION ELECTRONIC MODULES for a list of all DTCs. |
| U2472 | Unexpected Ignition State | SJB | On-demand | U2472 sets when the ignition is not in RUN or ignition status cannot be obtained. VERIFY correct ignition switch state during self-test. |
| U2472 | Unexpected Ignition State | IC | Continuous | U2472 sets when the ignition hard-wired START/RUN circuit and networked ignition status does not match. VERIFY correct ignition switch state. |
| U2473 | Unexpected Vehicle Speed | SJB | On-demand | U2473 sets when the vehicle speed exceeds 5 kph or vehicle speed cannot be determined. VERIFY vehicle is stationary during self-test. |
| U2510 | CAN - Invalid Data For Vehicle Security | IC | Continuous | REFER to ANTI-THEFT - PASSIVE ANTI-THEFT SYSTEM (PATS) . |
| U2511 | CAN - Data Mis-Match (Receive Data Des Not Match Expected) | IC | Continuous | REFER to ANTI-THEFT - PASSIVE ANTI-THEFT SYSTEM (PATS) . |