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DTC U0168 KOS CAN timeout
 
 
caution
  • If DTC U0168 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 KOS-ECU cannot be received, OSS-ECU sets the DTC U0168.
 
 
DTC SET CONDITION
Check Conditions
  • When all the following conditions are met.
    1. Power supply mode: ON
    2. ETACS-ECU battery voltage is at 10 to 16 V.
Judgment Criterion
  • After the following condition is met, 2,500 ms or more have elapsed.
    1. CAN signal from KOS-ECU cannot be received.
 
 
TROUBLESHOOTING HINTS
  • Malfunction of the CAN bus line
  • Malfunction of KOS-ECU
  • Malfunction of KOS-ECU power supply circuit
  • Malfunction of OSS-ECU
 
 
DIAGNOSIS
1. Using scan tool MB991958, diagnose the CAN bus line.
2. ETACS-ECU DTC check
3. OSS-ECU DTC recheck