Detroit 12.7 DDEC 4 Interesting problem

Discussion in 'Trucks [ Eighteen Wheelers ]' started by eagle005, Feb 10, 2015.

Page 6 of 6

Oct 9, 2021 #51

simonsocm Light Load Member

109

64

Aug 17, 2019

0

Pretty sure OP had the sensor calibration in the ecm wrong.

I'm having a similar issue with my coolant temp sensor currently and I'm really thinking it's a calibration issue.

So far I've swapped the sensor and mechanical gauge and the engine harness. Nothing has changed. ECM always shows temperature at 12 degrees below actual.

I also found this online that explains a bit.

Going from a DDEC III to DDEC IV ECM? Do Yourself A Favor And Verify Your Temperature Sensor Readings - Diesel Control - Magazine - Movin' Out

simonsocm, Oct 9, 2021

simonsocm, Oct 9, 2021

#51
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