Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001GZ6T
Model Year Start: 2020 Model: Corolla Prod Date Range: [01/2019 - 09/2022]
Title: CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM (for HV Model): P163081; Communication Error from VSC to ECM Invalid Serial Data Received; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]

DTC

P163081

Communication Error from VSC to ECM Invalid Serial Data Received

DESCRIPTION

The skid control ECU (brake booster with master cylinder assembly) sends signals such as brake request signals to the hybrid vehicle control ECU. If an abnormal signal is detected, the hybrid vehicle control ECU stores DTC P163081.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

P163081

Communication Error from VSC to ECM Invalid Serial Data Received

w/o Full-speed Range Following Function:

  • When the vehicle speed is 30 km/h (20 mph) or more and the dynamic radar cruise control system is operating, the hybrid vehicle control ECU detects abnormal data sent from the skid control ECU (brake actuator assembly) for approximately 1 second or more.

w/ Full-speed Range Following Function:

  • When the dynamic radar cruise control system is operating, the hybrid vehicle control ECU detects abnormal data sent from the skid control ECU (brake actuator assembly) for approximately 1 second or more.
  • Electronically controlled brake system
  • Hybrid vehicle control ECU

Cruise Control

CAUTION / NOTICE / HINT

NOTICE:

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

Click here 2020 MY Corolla Corolla HV [01/2019 - 04/2020]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION

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

GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM

A

2.

CHECK FOR DTC

(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 P163081 is not output

A

DTC P163081 is output

B
A

USE SIMULATION METHOD TO CHECK

B

REPLACE HYBRID VEHICLE CONTROL ECU