DIAGNOSIS FUNCTION



 When the system fails
    "4WD SYSTEM SERVICE REQUIRED" should be displayed at the centre on the multi-information display, and "4WD" should flash at the left upper.

When the S-AWC system oil is too hot
    Either of "AWC ECO", "NORMAL", "SNOW", "LOCK" should flash at the left upper, and "4WD SYSTEM OVERHEATING SLOW DOWN" should be displayed at the centre. Then the S-AWC drive mode-selector will be disabled to avoid damage to the drive train components.

Fail-safe function
If the AWC-ECU receives an abnormal signal from sensors, switches, or solenoids, it will enter a fail-safe mode to ensure the safety of the driver and prevent damage to the system.

Fail-safe reference table
Diagnosis code No.
 Control content
C1613, C1614
 The multi-information display should inform the driver of a system malfunction, but the vehicle handling will not be affected. The electronic controlled S-AWC will continue to work.
C1219, C121A, C123C, C1242, C1623, C1630, C1632, C1633, C1634, C2205, U0100, U0101, U0126, U0131, U0401, U0428, U1425, U1426, U1428, U142B
 The multi-information display should inform the driver of a system malfunction, and the system control will be disabled partially.
C161F, C1621
 "4WD SYSTEM OVERHEATING" will be displayed on the multi-information display, and the system will protect the drive train components.
C100A, C1011, C1014, C1015, C101C, C101F, C1020, C1027, C102A, C102B, C1032, C1035, C1078, C1610, C1615, C1616, C1624, C1626, C1627, C1628, C1629, C1631, C1635, C1707, C2100, C2101, U0121, U0141, U0431, U1073, U1195, U1427
 The multi-information display should inform the driver of a system malfunction, and the system will be disabled.
note When the ignition switch is turned from OFF to ON, all of the fail-safe controls will be resumed.

ON-BOARD DIAGNOSTICS
If the AWC-ECU detects any problem in the CAN communication line or the ECUs, which the AWC-ECU is communicating with, it sets a diagnosis code. The diagnosis codes can be confirmed by connecting M.U.T.-III The set diagnosis codes are not erased even after the ignition switch has been turned to the LOCK (OFF) position, or the battery has been disconnected. The diagnosis codes can be erased by operating M.U.T.-III.

HOW TO READ AND ERASE DIAGNOSIS CODES
Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - Contents of Troubleshooting.