Lexus ES: System Diagram
SYSTEM DIAGRAM
w/ Blind Spot Monitor System 
w/ Panoramic View Monitor System 
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Terminals Of Ecu
TERMINALS OF ECU CLEARANCE WARNING ECU ASSEMBLY (a) Disconnect the N41 clearance warning ECU assembly connector. (b) Measure the voltage and resistance on the wire harness side connector according to
Control Module Communication Bus "A" Off (U0073,U0100,U0124,U0126,U0129,U0140,U0155,U0164,U0265)
DESCRIPTION These DTCs are stored if there is a malfunction in the CAN communication system connected to the clearance warning ECU assembly. HINT: If CAN communication system DTCs are stored, they may
Lost Communication with Blind Spot Monitor Slave Module (U0232,U0233)
DESCRIPTION This DTC is stored when the blind spot monitor sensor LH judges that there is a communication problem with the blind spot monitor sensor RH. DTC No. Detection Item DTC Detection Con
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Center Airbag Sensor Communication Stop Mode
DESCRIPTION Detection Item Symptom Trouble Area Center Airbag Sensor Communication Stop Mode Any of the following conditions are met:
Communication stop for "Airbag" is indicated on the "Communication Bus Check" screen of the Techstream.
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Communication stop history for
Rough Idling
DESCRIPTION Problem Symptom Suspected Area Trouble Area
Engine speed fluctuation due to abnormal combustion
Idle speed too low or high
Strong engine vibration due to above symptoms
Ignition malfunction
Deviation in air fuel ratio (Excessive or insufficient intake air volume
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