Code No. C1751
ECU failure
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- Whenever the ECU is replaced, ensure
that the CAN bus lines are normal.
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OPERATION
FCM/LDW/AHB-ECU monitors the malfunction in the ECU.
DIAGNOSIS CODE SET CONDITION
This diagnosis code is set when the abnormality below is detected:
- A malfunction is detected inside the FCM/LDW/AHB-ECU (including
the sensor).
PROBABLE CAUSES
- Malfunction of the FCM/LDW/AHB-ECU
DIAGNOSIS PROCEDURE
Check whether the diagnosis code is set again.
Check again if the diagnosis code is set in the FCM/LDW/AHB-ECU.
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(1)Erase the diagnosis code.
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(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
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(3)Check if diagnosis code is set.
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Q.
Is the diagnosis code 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).