Up to 08/2009

PRE-COLLISION: PRE-COLLISION SYSTEM: C1A0A: Front Radar Sensor Region Code Mismatch
C1A0A - Front Radar Sensor Region Code Mismatch

DESCRIPTION

The driving support ECU uses the millimeter wave radar sensor to detect obstacles in front of the vehicle.

Based on this information, the driving support ECU sends pre-collision control operation signals.

When the millimeter wave radar sensor is replaced with a new one, it acquires the country specification information from the driving support ECU. Also, when the driving support ECU is replaced with a new one, it receives country specification information from the main body ECU. When country specification information in the sensor, ECU and/or main body ECU do not match, DTC C1A0A is stored.





INSPECTION PROCEDURE

NOTICE:
When the millimeter wave radar sensor is replaced with a new one, adjustment of the radar sensor beam axis must be performed Adjustments.

PROCEDURE

1. CHECK MILLIMETER WAVE RADAR SENSOR

(a) Using the Techstream, enter the following menus: Powertrain / Radar Cruise / Data List.

Radar Cruise





(b) Read the Data List and check the country specification information of the millimeter wave radar sensor and vehicle.

Result





HINT
- The country specification information of the driving support ECU is decided by the main body ECU. Even if the vehicle and sensor country specification information match, if the country specification information for the vehicle and ECU/main body ECU do not match, it is necessary to replace the ECU and meter.
- When the country specification information (North America[--]Europe) for the vehicle body and sensor do not match, the sensor information can be overwritten by performing the sensor axis adjustment.
C -- ADJUST MILLIMETER WAVE RADAR SENSOR Adjustments

B -- REPLACE MILLIMETER WAVE RADAR SENSOR Removal
A -- Continue to next step.

2. REPLACE MAIN BODY ECU

(a) Replace the main body ECU Removal.

NEXT -- Continue to next step.

3. 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 C1A0A is not output.

NG -- REPLACE DRIVING SUPPORT ECU Removal

OK -- END