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DTC U0147 GATEWAY BSW CAN timeout
 
 
caution
  • If DTC U0147 is set in the ETACS-ECU, always diagnose the CAN bus line.
  • Before replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
  • When the ETACS-ECU of vehicles without KOS is replaced, the encrypted code of the ignition key needs to be registered to the ETACS-ECU. (If the encrypted code is not registered, the engine cannot be started. Register the encrypted code as described in Immobilizer System - How to Register Key ID .)
 
 
DIAGNOSTIC FUNCTION
If the signal from gateway-ECU cannot be received, the ETACS-ECU sets DTC U0147.
 
 
JUDGMENT CRITERIA
After the following statuses continue to be true for 5 seconds, if the communication with the gateway-ECU cannot be established for 2,500 ms or more, the ETACS-ECU determines that a problem has occurred.
  • No abnormality is present to the network.
  • Ignition switch is in the ON position.
  • No abnormality is present to the power supply fuse (IOD fuse), or the odometer value is at 80.5 km (50.0 miles) or more.
  • ETACS-ECU system voltage is at 10-16 Volts.
 
 
TROUBLESHOOTING HINTS
  • Malfunction of the gateway-ECU
  • Malfunction of the ETACS-ECU
  • Malfunction of the CAN bus
 
 
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. Check the scan tool (M.U.T.-III) DTC for other systems
Check if DTC U0147 is set in the BSW-ECU (master).
Is the DTC set?
Troubleshoot the BSW-ECU (master) "Code No.U0147 GATEWAY BSW CAN timeout" (Refer to ).
Go to Step 3.
 
STEP 3. Check whether the DTC is set again.
Check again if DTC U0147 is set in the ETACS-ECU.
(1) Erase the diagnostic trouble code.
(2) Turn the ignition switch from the LOCK (OFF) position to the ON position.
(3) Check if the DTC is set.
Is the DTC set?
Replace the ETACS-ECU.
A poor connection, open circuit, or other intermittent malfunction in the CAN bus line between the gateway-ECU and ETACS-ECU. (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).