The skid control ECU (brake actuator assembly) sends signals such as brake request signals to the ECM. When the ECM detects logic error signals sent from the skid control ECU (brake actuator assembly) for a certain period of time, DTC P163181 is stored.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | DTC Output from | Priority | Note |
|---|---|---|---|---|---|---|---|
| P163181 | Communication Error from ECM to VSC Invalid Serial Data Received | When the ignition switch is ON and the dynamic radar cruise control system is operating, the ECM detects logic error signals sent from the skid control ECU (brake actuator assembly) for approximately 1 second or more. | ·
Electronically controlled brake system ·
ECM |
Does not come on | Radar Cruise1 | B | SAE Code: P1631 |
Before replacing the ECM, refer to Service Bulletin.
When the ECM is replaced, update the ECU security key.
Check for electronically controlled brake system DTCs.
| Result | Proceed to |
|---|---|
| Electronically controlled brake system DTCs are not output | A |
| Electronically controlled brake system DTCs are output | B |
A
B
Clear the DTCs.
| Proceed to |
|---|
| NEXT |
NEXT
Pre-procedure1
Make sure that the DTC detection conditions are met.
If the detection conditions are not met, the system cannot detect the malfunction.
Procedure1
Check for DTCs.
| Result | Proceed to |
|---|---|
| P163181 is not output | A |
| P163181 is output | B |
Post-procedure1
None
A
B