RFW System Driveline / Axle
On-Board Diagnostic System
• Detected malfunctions are stored as 4-digit DTCs in the PCM memory and can be
retrieved by means of M-MDS.
DTC Table
DTC Malfunction
P1812 RFW lock solenoid valve circuit failure
P1813 RFW lock solenoid valve open circuit
P1814 RFW lock solenoid valve circuit/short to battery
P1815 RFW lock solenoid valve circuit/short to ground
P1878 RFW free solenoid valve circuit failure
P1879 RFW free solenoid valve open circuit
P1880 RFW free solenoid valve circuit/short to battery
P1885 RFW free solenoid valve circuit/short to ground
BT-50_T03002
Simulation Test
• A simulation test has been adopted to check the function of certain output components
by means of M-MDS.
PID Applicable component
Condition
Test condition
4WDMODE_L #
4WD indicator light OFF/ON
HUBLOCK #
RFW lock solenoid valve OFF/ON
HUBLOCK_L #
RFW free solenoid valve OFF/ON
NTFLAMP #
RFW indicator light OFF/ON
BT-50_T03003
Engine switch at
ON
NOTE: Further diagnosis is supported by the symptom troubleshooting section in the W/M.
03-4 Service Training BT-50
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