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DTC No.U1428: Sensor Cluster CAN Message
 
 
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 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
AWD-ECU receives the G and yaw rate sensor data from ASC-ECU via the CAN communication.
 
 
DTC SET CONDITIONS
This DTC is set when the abnormality below is detected:
  • Abnormality is detected in the G and yaw rate sensor signal received from the ASC-ECU.
 
 
TROUBLESHOOTING HINTS
  • 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 AWD-ECU
  • Malfunction of ASC-ECU

 
 
DIAGNOSIS
STEP 1. Scan tool (M.U.T.-III) CAN bus diagnostics.
(1)
cautionTo prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III).
Connect scan tool (M.U.T.-III). Refer to "How to connect the Scan Tool (M.U.T.-III) ."
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is the check result normal?
Go to Step 2.
Repair the CAN bus lines. (Refer to GROUP 54C - Troubleshooting ).
 
STEP 2. Scan tool (M.U.T.-III) other system DTC.
Check the ASC DTC (Refer to GROUP 35C - Troubleshooting ).
Is the DTC set?
Perform the relevant troubleshooting.
Go to Step 3.
 
STEP 3. Scan tool (M.U.T.-III) DTC.
Check if DTC No.C123C, C1242 is set (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 set again.
Is DTC No.U1428 set?
Replace the AWD-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 set again.
Is DTC No.U1428 set?
Return to Step 1.
This diagnosis is complete.