Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Communication Error from ECM to VSC Invalid Serial Data Received (P163181)

Toyota Corolla Cross (2022-2025) Service Manual / Engine & Hybrid System / Hybrid / Battery Control / Hybrid Control System / 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

Warning Indicate

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 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.

(1 trip detection logic)
  • Electronically controlled brake system
  • Hybrid vehicle control ECU

Does not come on

Master Warning:

Does not come on

SAE Code:

P1631

CAUTION / NOTICE / HINT

NOTICE:

Before replacing the hybrid vehicle control ECU, refer to Registration.

Click here

PROCEDURE

1.

CHECK FOR DTCs

(a) Check for electronically controlled brake system DTCs.

Chassis > Brake/EPB > Trouble Codes Chassis > Brake Booster > Trouble Codes

Result

Proceed to

Electronically controlled brake system DTCs are not output

A

Electronically controlled brake system DTCs are output

B
B

GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM

A

2.

CHECK FOR DTCs

(a) Clear the 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 > Hybrid Control > 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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