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2007 Lexus GS450h – No ECM Communication With U0100-211

Aug 15
1 min read

Updated: Aug 15

CUSTOMER CONCERN

Customer states the check-engine light does not illuminate and the scan tool cannot communicate with the ECM. DTCs U0100-211, U0100-530 and U0100-784 are stored in the hybrid ECU.

CAUSE

Isolating ECM connector E83 terminal 125 restored the 5-volt VC circuit, confirming the fuel-pressure sensor was pulling down the reference circuit.

CORRECTION

Remove and replace fuel-pressure sensor. Restore VC circuit connection, clear communication DTCs and verify ECM communication.

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2007 Lexus GS450h – No ECM Communication With U0100-211

CUSTOMER CONCERN

CAUSE

CORRECTION

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