Lexus ES: Communication Error from ECM to VSC Invalid Serial Data Received (P163181)
DESCRIPTION
The skid control ECU (brake booster with master cylinder assembly) sends signals such as brake request signals to the hybrid vehicle control ECU. When the hybrid vehicle control ECU detects logic error signals sent from the skid control ECU (brake booster with master cylinder assembly) for a certain period of time, DTC P163181 is stored.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | DTC Output from |
|---|---|---|---|---|---|
| P163181 | Communication Error from ECM to VSC Invalid Serial Data Received | When the power switch is on (IG) and the dynamic radar cruise control system is operating, the hybrid vehicle control ECU detects logic error signals sent from the skid control ECU (brake booster with master cylinder assembly) for approximately 1 second or more. |
| Does not come on | Hybrid Control |
CAUTION / NOTICE / HINT
NOTICE:
Before replacing the hybrid vehicle control ECU, refer to Registration.
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PROCEDURE
| 1. | CHECK FOR DTCs |
(a) Check for electronically controlled brake system DTCs.
Chassis > ABS/VSC/TRAC > Trouble Codes| Result | Proceed to |
|---|---|
| Electronically controlled brake system DTCs are not output | A |
| Electronically controlled brake system DTCs are output | B |
| B | .gif) | GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM |
|
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| 2. | CHECK FOR DTCs |
(a) Clear the DTCs.
Powertrain > Radar Cruise1 > Clear DTCs(b) Make sure that the DTC detection conditions are met.
HINT:
If the detection conditions are not met, the system cannot detect the malfunction.
(c) Check for DTCs.
Powertrain > Radar Cruise1 > Trouble Codes| Result | Proceed to |
|---|---|
| DTC P163181 is not output | A |
| DTC P163181 is output | B |
| A | | USE SIMULATION METHOD TO CHECK |
| B | | REPLACE HYBRID VEHICLE CONTROL ECU |
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