2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) U CODE Page 346

OK -- Continue to next step.

4. CHECK DRIVING SUPPORT ECU (LRRD OUTPUT VOLTAGE)

(a) Turn the engine switch on (IG).

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

Standard Voltage:

Text in Illustration

NG -- REPLACE DRIVING SUPPORT ECU See: Cruise Control/Cruise Control Module/Service and Repair/Removal

OK -- Continue to next step.

5. REPLACE MILLIMETER WAVE RADAR SENSOR

(a) Replace the millimeter wave radar sensor See: Accessories and Optional Equipment/Collision Avoidance and Parking Assist

Systems/Distance Sensor/Service and Repair/Removal.

(b) Adjust the millimeter wave radar sensor See: Accessories and Optional Equipment/Collision Avoidance and Parking Assist

Systems/Distance Sensor/Adjustments.

NEXT -- Continue to next step.

6. CHECK DTC OUTPUT

(a) Clear the DTCs See: Accessories and Optional Equipment/Collision Avoidance and Parking Assist Systems/Testing and

Inspection/Reading and Clearing Diagnostic Trouble Codes/Pre-Collision System.

(b) Turn the cruise control main switch on.

(c) Drive the vehicle at the required speed (27 mph (45 km/h) or higher).

(d) Check if the same DTC is output See: Accessories and Optional Equipment/Collision Avoidance and Parking Assist Systems/Testing

and Inspection/Reading and Clearing Diagnostic Trouble Codes/Pre-Collision System.

Result:

B -- REPLACE DRIVING SUPPORT ECU See: Cruise Control/Cruise Control Module/Service and Repair/Removal

A -- END

From 08/2009

PRE-COLLISION: PRE-COLLISION SYSTEM: U1104: Lost Communication with Driving Support ECU

U1104 - Lost Communication with Driving Support ECU