DTC C1802 ACC ECU Fail
caution
Before replacing the ECU, ensure that the communication circuit is normal.
OPERATION
The ASC-ECU communicates with the ACC-ECU via CAN bus lines.
DTC SET CONDITIONS
If the ASC-ECU receives an abnormal signal from the ACC-ECU with the ACC activated, it will set the DTC.
PROBABLE CAUSES
Wiring harness or connector failure of CAN bus line
Malfunction of ACC-ECU
DIAGNOSIS
1.
Check scan tool (M.U.T.-IIISE) CAN bus diagnostics
2.
Check whether the DTC is set again.