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DTC U1190 No receive fault detect signal
 
 
caution
  • If DTC U1190 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 ETACS-ECU via the gateway-ECU and CAN bus lines.
 
 
DIAGNOSTIC FUNCTION AND TROUBLE JUDGMENT
When the BSW-ECU (master) cannot receive any fault detect signal from the ETACS-ECU within 5 seconds after the electric motor switch is turned on, the ECU sets DTC U1190.
 
 
TROUBLESHOOTING HINTS
  • Malfunction of the ETACS-ECU
  • Malfunction of the BSW-ECU (master)
 
 
DIAGNOSIS
1. Using scan tool (M.U.T.-IIISE), diagnose the CAN bus line.
2. Using scan tool (M.U.T.-IIISE), read the other system DTC (Check if DTC U1190 is set in the gateway-ECU.).
3. Using scan tool (M.U.T.-IIISE), read the BSW-ECU (master) DTC again.