Wednesday, September 23, 2020

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) B CODE Page 397


2. CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU (GSW VOLTAGE))



(a) Disconnect the cable from the negative (-) battery terminal.



CAUTION:



Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.



(b) Reconnect the main body ECU (multiplex network body ECU) connector.



(c) Connect the cable to the negative (-) battery terminal.



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



Standard Voltage:



Text in Illustration



NOTICE:



Turning the engine switch on (IG) with the center airbag sensor assembly connector disconnected causes other DTCs to be stored.



Clear the DTCs after performing this inspection.



NG -- CHECK HARNESS AND CONNECTOR (CENTER AIRBAG SENSOR - INSTRUMENT PANEL JUNCTION



BLOCK)



OK -- Continue to next step.



3. REPLACE CENTER AIRBAG SENSOR ASSEMBLY



(a) Disconnect the cable from the negative (-) battery terminal.



CAUTION:



Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.



(b) Replace the center airbag sensor assembly See: Relays and Modules/Relays and Modules - Restraints and Safety Systems/Air Bag



Control Module/Service and Repair/Removal.



NEXT -- Continue to next step.



4. CHECK DTC OUTPUT



(a) Clear the DTC See: Body and Frame/Locks/Power Locks/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes.



(b) Recheck for DTCs.



OK:



DTC B1243 is not output.



NG -- REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) See: Body and Frame/Body Control



Systems/Body Control Module/Service and Repair/Removal



OK -- END (CENTER AIR BAG SENSOR ASSEMBLY WAS DEFECTIVE)

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