Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM1000000018WSH
Model Year Start: 2018 Model: Sienna Prod Date Range: [11/2017 -           ]
Title: CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: P163081; Communication Error from VSC to ECM Invalid Serial Data Received; 2018 - 2020 MY Sienna [11/2017 -        ]

DTC

P163081

Communication Error from VSC to ECM Invalid Serial Data Received

DESCRIPTION

The skid control ECU sends signals such as cruise control cancel signals and brake demand response signals to the ECM when the dynamic radar cruise control system is in operation.

DTC No.

DTC Detection Condition

Trouble Area

MIL

P163081

While the vehicle speed is 36 km/h (22 mph) or more and the dynamic radar cruise control system is operating, communication data from the skid control ECU (brake actuator assembly) is logically inconsistent for approximately 0.5 seconds or more.
  • CAN communication circuit
  • Skid control ECU (Brake actuator assembly)
  • ECM

Does not come on

CAUTION / NOTICE / HINT

NOTICE:

First check the CAN communication system by following How to Proceed with Troubleshooting. After checking that there are no malfunctions in the CAN communication system, proceed with troubleshooting.

Click here 2018 - 2020 MY Sienna [11/2017 -        ]; NETWORKING: CAN COMMUNICATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

(a) Using the Techstream, check if the CAN communication system is functioning normally.

Click here 2018 MY Sienna [11/2017 - 08/2018]; NETWORKING: CAN COMMUNICATION SYSTEM: DIAGNOSIS SYSTEM 2019 - 2020 MY Sienna [08/2018 -        ]; NETWORKING: CAN COMMUNICATION SYSTEM: DIAGNOSIS SYSTEM

Result

Proceed to

CAN communication system DTCs are not output

OK

CAN communication system DTCs are output

NG
NG

GO TO CAN COMMUNICATION SYSTEM

OK

2.

CHECK FOR DTCs (RADAR CRUISE 1)

(a) Clear the DTCs.

Click here 2018 - 2020 MY Sienna [11/2017 -        ]; CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: DTC CHECK / CLEAR

(b) Perform the following to make sure that the DTC detection conditions are met.

HINT:

If the following conditions are not met, the malfunction cannot be detected.

  1. Turn the ignition switch to ON.
  2. Turn the dynamic radar cruise control system on using the cruise control main switch (ON-OFF button).
  3. Drive the vehicle at 36 km/h (22 mph) or more for 0.5 seconds or more.

(c) Check for DTCs.

Click here 2018 - 2020 MY Sienna [11/2017 -        ]; CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: DTC CHECK / CLEAR

Result

Proceed to

DTC P163081 is not output

A

DTC P163081 is output

B
A

USE SIMULATION METHOD TO CHECK

B

3.

REPLACE BRAKE ACTUATOR ASSEMBLY

(a) Replace the brake actuator assembly.

Click here 2018 - 2020 MY Sienna [11/2017 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: BRAKE ACTUATOR: REMOVAL

Proceed to

NEXT
NEXT

4.

CHECK FOR DTCs (RADAR CRUISE 1)

(a) Clear the DTCs.

Click here 2018 - 2020 MY Sienna [11/2017 -        ]; CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: DTC CHECK / CLEAR

(b) Perform the following to make sure that the DTC detection conditions are met.

HINT:

If the following conditions are not met, the malfunction cannot be detected.

  1. Turn the ignition switch to ON.
  2. Turn the dynamic radar cruise control system on using the cruise control main switch (ON-OFF button).
  3. Drive the vehicle at 36 km/h (22 mph) or more for 0.5 seconds or more.

(c) Check for DTCs.

Click here 2018 - 2020 MY Sienna [11/2017 -        ]; CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: DTC CHECK / CLEAR

Result

Proceed to

DTC P163081 is not output

A

DTC P163081 is output

B
A

END
B

REPLACE ECM