B2059

PRE-COLLISION: PRE-COLLISION SYSTEM: B2059: Vehicle Speed Malfunction

DTC B2059 - Vehicle Speed Malfunction

DESCRIPTION

The seat belt control ECU receives vehicle speed information from the ECM and master cylinder solenoid (skid control ECU) via CAN communication.
The ECM receives vehicle speed information from the master cylinder solenoid (skid control ECU) through the combination meter.
This DTC is stored when there is a difference in the vehicle speed information from the ECM and master cylinder solenoid (skid control ECU).






WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM (VEHICLE SPEED)
(a) Using the Techstream, enter the following menus: Body Electrical / Combination Meter / Data List.

Combination Meter





(b) Read the value displayed on the Techstream.
OK:
Vehicle speed displayed on the Techstream is almost the same as actual vehicle speed measured using speedometer tester (calibrated chassis dynamometer).
NG -- REPLACE COMBINATION METER
OK -- Continue to next step.
2. CHECK DTC (MALFUNCTION IN CAN COMMUNICATION SYSTEM WITH ECM)
(a) Using the Techstream, clear the DTCs Pre-Collision System.
(b) Check for DTCs Pre-Collision System.

Result





C -- REPLACE SEAT BELT CONTROL ECU
B -- GO TO CAN COMMUNICATION SYSTEM
A -- USE SIMULATION METHOD TO CHECK