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DTC C1751 ECU failure
 
 
caution
  • Whenever the ECU is replaced, ensure that the CAN bus lines are normal.
 
 
OPERATION
FCM/LDW/AHB-ECU monitors the malfunction in the ECU.
 
 
DTC SET CONDITION
This DTC is set when the abnormality below is detected:
  • A malfunction is detected inside the FCM/LDW/AHB-ECU (including the sensor).
 
 
TROUBLESHOOTING HINTS
  • Malfunction of the FCM/LDW/AHB-ECU
 
 
DIAGNOSIS
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) Erase the DTC.
(4) Turn off the power supply mode of the electric motor switch.
(5) Turn on the power supply mode of the electric motor switch.
(6) Check if DTC is set.
Is the DTC set?
Replace the FCM/LDW/AHB-ECU (Refer to ).
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).