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DTC C1800 Acceleration/Deceleration Monitor
 
 
cautionBefore replacing the ECU, ensure that the communication circuit is normal.
 
 
OPERATION
The ASC-ECU receives target acceleration/deceleration signal via CAN bus lines from the ACC-ECU and electric parking brake ECU.
 
 
 
DTC SET CONDITIONS
The ASC-ECU compares an actual acceleration/deceleration signal with the target acceleration/deceleration signal, which is transmitted from the ACC-ECU and electric parking brake ECU. The ASC-ECU will set this DTC when these signals are significantly different.
 
 
 
PROBABLE CAUSES
  • ASC-ECU malfunction
 
 
 
 
DIAGNOSIS
Check whether the DTC is set again.
(1) Erase the DTC.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3) Turn the ignition switch to the "ON" position.
Is DTC C1800 set?
Replace the hydraulic unit (integrated with ASC-ECU) (Refer to ).
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/How to Cope with Intermittent Malfunctions ).