Code No. U0245 AND CAN timeout
caution
If diagnosis code No. U0245 is set, be sure to diagnose the CAN bus line.
Before replacing ECU, ensure that the communication circuit is normal.
DIAGNOSTIC FUNCTION
When the signal from the CAN box unit (MMCS) cannot be received, KOS-ECU sets the diagnosis code No.U0245.
JUDGEMENT CRITERIA
Check Conditions
When all the following conditions are met.
Ignition switch: ON
ETACS-ECU system voltage is at 10 to 16 V.
Judgment Criterion
After the following condition is met, 2,500 ms or more have elapsed.
CAN signal from MMCS cannot be received.
PROBABLE CAUSES
Malfunction of the CAN bus line
CAN box unit malfunction
Malfunction of MMCS power supply circuit
MMCS malfunction
Error in option coding setting of ETACS-ECU (replacement with the navigation unit not compatible with CAN communication)
Malfunction of KOS-ECU
DIAGNOSIS PROCEDURE
1.
M.U.T.-III CAN bus diagnosis
2.
Check of ETACS-ECU option coding
3.
ETACS-ECU diagnosis code check
4.
KOS-ECU diagnosis code recheck