DTC U1F53 CAN4 Bus-off
caution
If DTC U1F53 is set in the gateway-ECU, always diagnose the CAN bus line.
When replacing the ECU, always check that the communication circuit is normal.
DTC SET CONDITIONS
Check Condition
Turn the ignition switch to the "ON" position.
Judgment Criterion
CAN bus line [TCU (4ch)] off status is detected for 3 times continuously.
TROUBLESHOOTING HINTS
Malfunction of the CAN bus line [TCU (4ch)]
Malfunction of the gateway-ECU
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