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DTC C1754: Radar Calibration not Completed
 
 
caution
  • If there is any problem in the CAN bus lines, an incorrect DTC may be set. Prior to this diagnosis, diagnose the CAN bus lines.
  • Whenever the ECU is replaced, ensure that the communication circuit is normal.
 
 
OPERATION
The ACC-ECU memorizes the neutral position of its radar.
 
 
DIAGNOSTIC TROUBLE CODE SET CONDITION
This DTC is set when the abnormality below is detected:
  • The ACC-ECU detects that the neutral position of its radar is not learned yet.
 
 
PROBABLE CAUSES
  • Neutral position of ACC-ECU radar not learned
  • Malfunction of ACC-ECU

 
 
DIAGNOSIS
STEP 1. ACC-ECU radar calibration
Perform calibration of ACC-ECU radar calibration (Refer to ).
Has the calibration succeeded?
This diagnosis is complete.
Go to Step 2.
 
STEP 2. Using scan tool (M.U.T.-IIISE), check whether the DTC is set again.
(1)
cautionTo prevent damage to scan tool (M.U.T.-IIISE), always turn off the power supply mode of the electric motor switch before connecting or disconnecting scan tool (M.U.T.-IIISE).
Connect scan tool (M.U.T.-IIISE). Refer to "How to connect the Scan Tool (M.U.T.-IIISE) ."
(2) Turn on the power supply mode of the electric motor switch.
(3) Check if the DTC is set.
(4) Turn off the power supply mode of the electric motor switch.
Is DTC C1754 set?
Replace the ACC-ECU (Refer to ).
This diagnosis is complete.