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DTC U1428: Sensor Cluster CAN Message
 
 
caution
  • If there is any problem in the CAN bus lines, an incorrect DTC may be stored. Prior to this diagnosis, diagnose the CAN bus lines.
  • Whenever the ECU is replaced, ensure that the CAN bus lines are normal.
  • Do not drop the G and yaw rate sensor or subject it to a shock.
  • When G and yaw rate sensor is replaced, calibrate G and yaw rate sensor (refer to GROUP 35C - On-vehicle Service )
 
 
OPERATION
AWC-ECU receives the G and yaw rate sensor data from ASC-ECU via the CAN communication.
 
 
DTC SET CONDITIONS
This DTC is stored when the abnormality below is detected:
  • Abnormality is detected in the G and yaw rate sensor signal received from the ASC-ECU.
 
 
PROBABLE CAUSES
  • Malfunction of G and yaw rate sensor
  • Malfunction of G and yaw rate sensor power supply
  • Damaged connector(s)
  • Malfunction of the CAN bus line
  • Malfunction of AWC-ECU
  • Malfunction of ASC-ECU

 
 
DIAGNOSTIC PROCEDURE
STEP 1. Scan tool (M.U.T.-III) CAN bus diagnostics.
Use scan tool (M.U.T.-III) to perform the CAN bus diagnosis.
Is the check result normal?
Go to Step 2.
Repair the CAN bus lines. (Refer to GROUP 54C - Diagnosis, Can Bus Diagnostics Table ).
 
STEP 2. Scan tool (M.U.T.-III) other system DTC.
Check the ASC DTC (Refer to GROUP 35C - Diagnosis, Diagnostic Trouble Code Chart ).
Is the DTC stored?
Perform the relevant troubleshooting.
Go to Step 3.
 
STEP 3. Scan tool (M.U.T.-III) DTC.
Check if the DTC No.C123C, C1242 is stored (Refer to ).
Is the check result normal?
Perform the relevant troubleshooting.
Go to Step 4.
 
STEP 4. Scan tool (M.U.T.-III) data list.
Check the data list below (Refer to ).
  • Item No.22: Yaw rate sensor
  • Item No.23: Lateral G sensor
  • Item No.24: Longitudinal G sensor
Is the check result normal?
Go to Step 5.
Replace the hydraulic unit (Refer to GROUP 35C - Hydraulic unit (integrated with G and yaw rate sensor) ). Then go to Step 6.
 
STEP 5. Check whether the DTC is stored again.
Is DTC No.U1428 stored?
Replace the AWC-ECU (Refer to ). Then go to Step 6.
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
 
STEP 6. Check whether the DTC is stored again.
Is DTC No.U1428 stored?
Return to Step 1.
This diagnosis is complete.