DTC C1805 FCM/LDW/AHB Malfunction
caution
Before replacing the ECU, ensure that the communication circuit is normal.
OPERATION
The ASC-ECU communicates with the FCM/LDW/AHB-ECU via CAN bus lines.
DTC SET CONDITIONS
If the ASC-ECU receives an abnormal signal from the FCM/LDW/AHB-ECU with the FCM activated, it will set the DTC.
PROBABLE CAUSES
Wiring harness or connector failure of CAN bus line
Malfunction of FCM/LDW/AHB-ECU
Malfunction of ASC-ECU
DIAGNOSIS
1.
Check scan tool (M.U.T.-IIISE) CAN bus diagnostics
2.
Check scan tool (M.U.T.-IIISE) other system DTC No.C1798 <FCM/LDW/AHB-ECU>
3.
Check whether the DTC is set again.
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