DTC Code | DTC Name |
---|---|
U0100 | Lost Communication with ECM |
U0140 | Lost Communication with Body Control Module |
U0142 | Lost Communication with Body Control Module "B" |
U0155 | Lost Communication with Instrument Panel Cluster Control Module (Combination Meter) |
U1103 | Lost Communication with Stop and Start Control Module |
DESCRIPTION
These DTCs are stored when there is a CAN communication error between the certification ECU (smart key ECU assembly) and the ECM, main body ECU, combination meter assembly or engine stop and start ECU.
Tech Tips
When the cable is disconnected and reconnected to the negative (-) battery terminal, the power source mode returns to the state it was in before the cable was disconnected.
DTC No. | DTC Detection Condition | Trouble Area | DTC Output Confirmation Operation |
---|---|---|---|
U0100 | CAN communication malfunction between the certification ECU (smart key ECU assembly) and ECM (1-trip detection logic*). | ECM | Turn the engine switch on (IG) and wait 10 seconds or more. |
U0140 U0142 |
CAN communication malfunction between the certification ECU (smart key ECU assembly) and main body ECU (1-trip detection logic*). | Main body ECU | Always |
U0155 | CAN communication malfunction between the certification ECU (smart key ECU assembly) and combination meter assembly (1-trip detection logic*). | Combination meter assembly | Turn the engine switch on (IG) and wait 10 seconds or more. |
U1103 | CAN communication malfunction between the certification ECU (smart key ECU assembly) and engine stop and start ECU (1-trip detection logic*). | Engine stop and start ECU | Turn the engine switch on (IG) and wait 10 seconds or more. |
*: Only output while a malfunction is present and the engine switch is on (IG)
DTC Code | Vehicle Condition when Malfunction Detected | Fail-safe Function when Malfunction Detected |
---|---|---|
U0100 | There is no effect on vehicle behavior. |
If the following conditions are met, it is determined that the malfunction is not in the direct line (NE) but in CAN communication.
If the following conditions are met, it is determined that there is a malfunction in both CAN communication and the direct line (NE). |
U0140 U0142 |
Doors cannot be locked or unlocked. The warning (wireless buzzer) does not sound. |
- |
U0155 | The warning (meter buzzer) does not sound and the meter does not indicate a warning. | - |
U1103 |
|
- |
DTC | Data List Item | Active Test Item |
---|---|---|
U0100 U0140 U0142 U0155 U1103 |
- | - |
CAUTION / NOTICE / HINT
Note
When using the intelligent tester with the engine switch off to troubleshoot:
Connect the intelligent tester to the DLC3 and turn a courtesy light switch on and off at 1.5 second intervals until communication between the intelligent tester and vehicle begins.
After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.
PROCEDURE
CHECK FOR DTC
Note any DTCs that are output Click here.
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GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here |