Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VIIE
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 - 08/2016]
Title: CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: P1578; Brake System Malfunction; 2016 MY Sienna [12/2015 - 08/2016]

DTC

P1578

Brake System Malfunction

DESCRIPTION

This DTC is output when the VSC system has a problem. Check the VSC system when this DTC is output.

DTC No.

DTC Detection Condition

Trouble Area

P1578

The ECM receives a brake system error signal for 0.2 seconds or more while the dynamic radar cruise control is in operation
  • VSC system
  • ECM

HINT:

This circuit uses CAN communication. Therefore, if there are any malfunctions in the communication circuit, one or more DTCs in the CAN communication system are output.

WIRING DIAGRAM

PROCEDURE

1.

CHECK DTC (VEHICLE STABILITY CONTROL SYSTEM)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes.

(e) Check for DTCs.

Result

Result

Proceed to

DTC is not output

A

DTC is output

B
A

REPLACE ECM

B

GO TO VEHICLE STABILITY CONTROL SYSTEM (DTC CHART)