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GA_TMAC · 10-31-2014, 04:44 PM

Hi All,

I have an 1987 R10 5.0 with THM400 trans. The ECM appears to be working OK. I can get code 12 and I can disconnect the coolant sensor and it throws the code. My question is (when using Win ALDL) should the scan tool (more properly the ECM) be reporting/seeing any voltage if the 02 sensor is disconnected? IF the O2 sensor is unplugged, should it throw a code? Thanks in advance

GA_TMAC

10-31-2014, 04:44 PM	#1
GA_TMAC Registered User Join Date: Oct 2014 Location: Warner Robins, GA Posts: 3	02 Sensor Voltage via Scan When Sensor is Unplugged Hi All, I have an 1987 R10 5.0 with THM400 trans. The ECM appears to be working OK. I can get code 12 and I can disconnect the coolant sensor and it throws the code. My question is (when using Win ALDL) should the scan tool (more properly the ECM) be reporting/seeing any voltage if the 02 sensor is disconnected? IF the O2 sensor is unplugged, should it throw a code? Thanks in advance GA_TMAC