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.
2002 Mazda B2300 StandardFACTORY OEM SERVICE PROCEDURE
Transfer Case DTCS
TRANSFER CASE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| P1812 | 4WD Shift Control Switch Ckt. Failure |
| P1815 | 4WD Shift Control Switch Ckt. Short To Ground |
| P1820 | Transfer Case Shift Relay Ckt. Failure |
| P1822 | Transfer Case Shift Relay Coil Ckt. Short To Voltage |
| P1824 | 4WD Electric Clutch Relay Ckt. Failure |
| P1826 | 4WD Electric Clutch Relay Ckt. Short To Voltage |
| P1828 | Transfer Case Shift Relay Coil Ckt. Failure |
| P1830 | Transfer Case Shift Relay Coil Ckt. Short To Voltage |
| P1832 | Transfer Case Diff. Lockup Solenoid Ckt. Failure |
| P1833 | Transfer Case Diff. Lockup Solenoid Ckt. Open |
| P1834 | Transfer Case Diff. Lockup Solenoid Ckt. Short To Voltage |
| P1835 | Transfer Case Diff. Lockup Solenoid Ckt. Short To Ground |
| P1838 | Transfer Shift Motor Ckt. Failure |
| P1846 | Transfer Case Contact "A" Ckt. Failure |
| P1850 | Transfer Case Contact "B" Ckt. Failure |
| P1854 | Transfer Case Contact "C" Ckt. Failure |
| P1858 | Transfer Case Contact "D" Ckt. Failure |
| P1863 | Transfer Case Contact Plate Power Ckt. Open |
| P1866 | Transfer Case System Concern-Servicing Required |
| P1867 | Transfer Case Contact Plate-General Ckt. Failure |
| P1878 | Transfer Case Diff. Disengage Solenoid Ckt. Failure |
| P1879 | Transfer Case Diff. Disengage Solenoid Ckt. Open |
| P1880 | Transfer Case Diff. Disengage Solenoid Ckt. Short To Voltage |
| P1885 | Transfer Case Diff. Disengage Solenoid Ckt. Short |
| P1891 | Transfer Case Contact Ground Return Ckt. Open |
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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