Pre-Collision Brake Cancel Switch Circuit

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

DESCRIPTION

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

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

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

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Pre-Collision 2 / Data List.

(e) Read the display on the Techstream.

Pre-Collision 2





OK:

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

NG -- INSPECT PRE-COLLISION SYSTEM CANCEL SWITCH ASSEMBLY

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

2. INSPECT PRE-COLLISION SYSTEM CANCEL SWITCH ASSEMBLY

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





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

Standard Resistance:





Text in Illustration





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

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

(a) Disconnect the L60 driving support ECU assembly connector.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (PRE-COLLISION SYSTEM CANCEL SWITCH - DRIVING SUPPORT ECU)

OK -- REPLACE DRIVING SUPPORT ECU ASSEMBLY Removal