If diagnostic trouble DTC U1190 is set, diagnose the CAN bus lines.
When replacing the ECU, always check that the communication circuit is normal.
JUDGMENT CRITERIA
ETACS-ECU sends the DTC (U code) detection permission or prohibition signal to each ECU connected to the CAN bus line. If the gateway-ECU cannot receive the DTC (U code) detection permission or prohibition signal for 5 seconds after turning the ignition switch to "ON" position, DTC U1190 will be set.
PROBABLE CAUSES
Malfunction of the ETACS-ECU
Malfunction of CAN bus line
Malfunction of the gateway-ECU
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 diagnostic trouble code
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