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DTC U110A PHEV-ECU CAN timeout
 
 
caution
  • If DTC U110A is set in the BSW-ECU (master), 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.
 
 
OPERATION
The BSW-ECU (master) communicates with the PHEV-ECU via the gateway-ECU and CAN bus lines.
 
 
CHECK CONDITION
Electric motor switch is in the ON position.
 
 
DIAGNOSTIC FUNCTION AND TROUBLE JUDGMENT
If the BSW-ECU (master) cannot receive any signal from the PHEV-ECU for at least 2.5 seconds, the ECU sets DTC U110A.
 
 
TROUBLESHOOTING HINTS
  • Power supply to the PHEV-ECU fails
  • Malfunction of the PHEV-ECU
  • Power supply to the gateway-ECU fails
  • Malfunction of the gateway-ECU
  • Malfunction of the BSW-ECU (master)
  • Malfunction of the CAN bus
 
 
DIAGNOSIS
STEP 1. Using scan tool (M.U.T.-IIISE), diagnose the CAN bus line.
(1)
cautionTo prevent damage to scan tool (M.U.T.-IIISE), always turn the electric motor switch to the "OFF" position 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 the electric motor switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the electric motor switch to the "OFF" position.
Is the CAN bus line found to be normal?
Go to Step 2.
Repair the CAN bus line (Refer to GROUP 54C - Diagnosis <CAN>, CAN Bus Diagnostic Table ).
 
STEP 2. Using scan tool (M.U.T.-IIISE), read the other system DTC.
Check that the other ECU performing CAN communication with PHEV-ECU sets DTC U110A, U1160 and U0293 [Refer to GROUP 54C - CAN Communication-related Diagnosis Code (U-code) Table ].
Is the DTC set?
Go to Step 3.
Go to Step 4.
 
STEP 3. Using scan tool (M.U.T.-IIISE), read the BSW-ECU (master) DTC again.
Check again if the DTC is set in the BSW-ECU (master).
(1) Erase the DTC.
(2) Turn the electric motor switch from "OFF" position to "ON" position.
(3) Check if DTC is set.
Is the DTC set?
Replace the PHEV-ECU.
The trouble can be an intermittent malfunction such as a poor connection or open circuit in the CAN bus lines between the PHEV-ECU and the BSW-ECU (master) (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).
 
STEP 4. Using scan tool (M.U.T.-IIISE), read the other system DTC.
Check if DTC U0146 is set in the ETACS-ECU.
Is the DTC set?
Troubleshoot the ETACS-ECU (Refer to ETACS, Diagnostic Trouble Code Chart ).
Go to Step 5.
 
STEP 5. Using scan tool (M.U.T.-IIISE), read the other system DTC.
Check if DTC U1073 is set in the gateway-ECU.
Is the DTC set?
Troubleshoot the gateway-ECU (Refer to GROUP 54C - Diagnosis <GATEWAY>, Diagnostic Trouble Code Chart ).
Go to Step 6.
 
STEP 6. Using scan tool (M.U.T.-IIISE), read the BSW-ECU (master) DTC again.
Check again if the DTC is set in the BSW-ECU (master).
(1) Erase the DTC.
(2) Turn the electric motor switch from "OFF" position to "ON" position.
(3) Check if the DTC is set.
Is the DTC set?
Replace the BSW-ECU (master).
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).