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.
2007 Mazda B3000 Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Communication Device DTCS
COMMUNICATION DEVICES DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Source | Action |
|---|---|---|---|
| B1202 | Fuel Sender Circuit Open | Instrument Cluster | See PINPOINT TEST 21: INCORRECT FUEL GAUGE INDICATION , . |
| B1204 | Fuel Sender Circuit Short to Ground | Instrument Cluster | See PINPOINT TEST 21: INCORRECT FUEL GAUGE INDICATION , . |
| B1317 | Battery Voltage High | Instrument Cluster | See CHARGING SYSTEM PINPOINT TEST 3: CHARGING SYSTEM OVERCHARGES (BATTERY VOLTAGE IS GREATER THAN 15.5 VOLTS) , . |
| B1318 | Battery Voltage Low | Instrument Cluster | See CHARGING SYSTEM PINPOINT TEST 1: BATTERY IS DISCHARGED OR BATTERY VOLTAGE IS LOW , . |
| B1342 | ECU is Defective | Instrument Cluster | Clear all DTCs. Retrieve the DTCs. If DTC B1342 is still present, install a new instrument cluster. see INSTRUMENT CLUSTER . Test the system for normal operation. |
| B1363 | Ignition Start Circuit Failure | Instrument Cluster | See PINPOINT TEST 23: DTC B1363 - IGNITION START CIRCUIT FAULT , . |
| B2143 | NVM Memory Failure | Instrument Cluster | See PINPOINT TEST 5: THE ODOMETER IS INOPERATIVE , . |
| B2207 | ECU ROM Checksum | Instrument Cluster | Clear all DTCs. Retrieve the DTCs. If the DTC B2207 is still present, install a new instrument cluster. see INSTRUMENT CLUSTER . Test the system for normal operation. |
| B2477 | Module Configuration Failure | Instrument Cluster | Reconfigure the instrument cluster. See MODULE CONTROLLED FUNCTIONS , . |
| B2675 | Trip Reset Button Stuck | Instrument Cluster | Verify that there is no interference between the instrument cluster lens or mask and the trip reset button. If OK, install a new instrument cluster. see INSTRUMENT CLUSTER . Test the system for normal operation. |
| C1221 | ABS Warning Lamp Output Circuit Short to Ground | Instrument Cluster | See PINPOINT TEST 16: BRAKE WARNING INDICATOR IS NEVER ON , . |
| C1226 | Brake Warning Lamp Output Circuit Short to Ground | Instrument Cluster | See PINPOINT TEST 8: ANTI-LOCK BRAKE SYSTEM (ABS) WARNING INDICATOR IS NEVER/ALWAYS ON , . |
| C2784 | RAM Checksum Failure | Instrument Cluster | Clear all DTCs. Retrieve the DTCs. If DTC C2784 is still present, install a new instrument cluster. see INSTRUMENT CLUSTER . Test the system for normal operation. |
| U0102 | Lost Communication With the Transfer Case Control Module | Instrument Cluster | See PINPOINT TEST 19: 4WD AND 4WD LOW INDICATOR IS NEVER/ALWAYS ON , . |
| U0140 | Lost Communication With the Body Control Module (GEM) | Instrument Cluster | Monitor the instrument cluster indicators and warning indicators for correct operation. If any indicators or warning indicators do not function correctly, See SYMPTOM TROUBLESHOOTING CHART - INSTRUMENT CLUSTER , . If all indicators are functioning correctly, clear the DTCs. Repeat the self test, If DTC U0140 returns, install a new SJB. See SMART JUNCTION BOX (SJB) , . |
| U0151 | Lost Communication With the Restraints Control Module (RCM) | Instrument Cluster | See PINPOINT TEST 20: AIR BAG WARNING INDICATOR IS NEVER/ALWAYS ON , . |
| U0294 | Lost Communication With the Powertrain Control Module (PCM) | Instrument Cluster | Monitor the instrument cluster gauges, indicators and warning indicators for correct operation. If any gauges indicators or warning indicators do not function correctly, See SYMPTOM TROUBLESHOOTING CHART - INSTRUMENT CLUSTER , . If all indicators are functioning correctly, clear the DTCs. Repeat the self test, If DTC U0294 returns, install a new PCM. See POWERTRAIN CONTROL MODULE (PCM) REMOVAL / INSTALLATION , . |
| U2023 | Fault Received From External Node | Instrument Cluster | See PINPOINT TEST 11: MALFUNCTION INDICATOR LAMP (MIL) INDICATOR IS NEVER ON , . |
| U2050 | No Application Present | Instrument Cluster | Reflash the instrument cluster. If the DTC occurs after a software reflash, reflash the instrument cluster again. If the DTC is present after each attempt to reflash, install a new instrument cluster. see INSTRUMENT CLUSTER . Test the system for normal operation. |
| U2472 | Unexpected Ignition State | Instrument Cluster | Clear all DTCs. Repeat the instrument cluster self-test. If DTC U2472 is still present, install a new smart junction box (SJB). See SMART JUNCTION BOX (SJB) , . Test the system for normal operation. |
Factory Service Tools
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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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