Up to 08/2009

CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: C1A0A: Front Radar Sensor Region Code Mismatch
C1A0A - Front Radar Sensor Region Code Mismatch

DESCRIPTION

When the millimeter wave radar sensor assembly 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 the country specification information from the main body ECU. When the country specification information in the sensor and ECU do not match, DTC C1A0A is stored.





INSPECTION PROCEDURE

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

PROCEDURE

1. READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Radar Cruise / Data List / Country# (F Radar Sens).

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

Result





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

2. CHECK WHETHER DTC OUTPUT RECURS (DTC C1A0A)

(a) Connect the Techstream to the DLC3.

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

(c) Clear the DTCs Dynamic Radar Cruise Control System.

(d) Perform the following to make sure that the DTC detection conditions are met.

HINT
If the detection conditions are not met, the malfunction cannot be detected.

(1) Drive the vehicle at a speed of 40 km/h (25 mph) or more.

(2) Turn the cruise control main switch on.

(3) Push the -SET switch to activate the cruise control.

(e) Enter the following menus: Powertrain / Radar Cruise / Trouble Codes.

(f) Read the DTCs.

Result:





B -- REPLACE DRIVING SUPPORT ECU, MAIN BODY ECU AND MILLIMETER WAVE RADAR SENSOR ASSEMBLY

A -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting