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P1600 Diagnostic Trouble Code Discussion for January 2010

PCM Battery Backup Circuit Malfunction

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Trouble Ticket Help Requests for DTC P1600
Help Request Posted
2000 Toyota Corolla CE 1.8L MIL Lamp on VIN: 2T1BR12E3Y
P1600: ECM Battery Backup Circuit Malfunction. ... engine light comes on intermittently.  Sets code P1600-  ECM Battery Circuit.Performed diagnostics and checked back up power supply thru EFI fuse- No problem found. Replaced ECM with good used part and same problem.  Light will set right away or sometimes ...
January 21, 2010