Pre-Collision System

PRE-COLLISION: PRE-COLLISION SYSTEM: C1A41: Brake Request Value Mismatch between ENG / EHV and Driving Support ECU
C1A41 - Brake Request Value Mismatch between ENG / EHV and Driving Support ECU

DESCRIPTION

The brake booster with master cylinder (skid control ECU) receives brake control request signals from the power management control ECU and driving support ECU.

When the request signals received from the power management control ECU and driving support ECU are not consistent, the brake booster with master cylinder (skid control ECU) determines that a malfunction has occurred and sends a malfunction signal to the driving support ECU.

If the driving support ECU receives a malfunction signal, DTC C1A41 is stored.





INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC OUTPUT (ELECTRONICALLY CONTROLLED BRAKE SYSTEM)

(a) Check DTCs for the electronically controlled brake system Reading and Clearing Diagnostic Trouble Codes.

OK:

Electronically controlled brake system DTC is not output.

NG -- GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM How To Proceed With Troubleshooting
OK -- Continue to next step.

2. CHECK DTC OUTPUT (HYBRID CONTROL SYSTEM)

(a) Check DTCs for the hybrid control system Hybrid Control System.

OK:

Hybrid control system DTC is not output.

NG -- GO TO HYBRID CONTROL SYSTEM How To Proceed With Troubleshooting
OK -- Continue to next step.

3. REPLACE BRAKE BOOSTER WITH MASTER CYLINDER

(a) Replace the brake booster with master cylinder (skid control ECU) Removal.

NEXT -- Continue to next step.

4. CHECK DTC OUTPUT (PRE-COLLISION SYSTEM)

(a) Using the Techstream, enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes.

(b) Clear the DTCs Pre-Collision System.

(c) Check for DTCs.

OK:

DTC C1A41 is not output.

NG -- REPLACE POWER MANAGEMENT CONTROL ECU

OK -- END

5. REPLACE POWER MANAGEMENT CONTROL ECU

(a) Replace the power management control ECU Removal.

NEXT -- Continue to next step.

6. CHECK DTC OUTPUT (PRE-COLLISION SYSTEM)

(a) Using the Techstream, enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes.

(b) Clear the DTCs Pre-Collision System.

(c) Recheck for DTCs.

OK:

DTC C1A41 is not output.

NG -- REPLACE DRIVING SUPPORT ECU Removal

OK -- END