Pre-Collision System

PRE-COLLISION: PRE-COLLISION SYSTEM: Pre-Collision Brake Cancel Switch Circuit
- Pre-Collision Brake Cancel Switch Circuit

DESCRIPTION

The driving support ECU receives pre-collision brake on/off signals from the pre-collision brake cancel switch assembly.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM (PRE-COLLISION BRAKE CANCEL SWITCH)

(a) Use the Data List to check if the pre-collision brake cancel switch assembly is functioning properly Pre-Collision System.

Pre-Collision 2





OK:

On screen, item changes between ON and OFF according to above chart.

NG -- INSPECT PRE-COLLISION BRAKE CANCEL SWITCH ASSEMBLY

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Pre-Collision System

2. INSPECT PRE-COLLISION BRAKE CANCEL SWITCH ASSEMBLY

(a) Remove the pre-collision brake cancel switch assembly Removal.





(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPLACE PRE-COLLISION BRAKE CANCEL SWITCH ASSEMBLY Removal
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (PRE-COLLISION BRAKE CANCEL SWITCH - DRIVING SUPPORT ECU AND BODY GROUND)

(a) Disconnect the G52 switch connector.

(b) Disconnect the G43 ECU connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE DRIVING SUPPORT ECU Removal