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FJR Motorcycle Forums
Technical & Mechanical Problems
PC III and O2 Sensor Question
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<blockquote data-quote="Gitbox" data-source="post: 1247309" data-attributes="member: 86950"><p>Thanks for the responses, guys. <img src="https://www.fjrforum.com/forum//public/style_emoticons/default/smile.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>Queensland: the installation instruction page that you referred to is for Gen II FJRs, mine is a GEN I and those instructions make no mention of an O2 sensor.</p><p></p><p>Fred: excellent description of ECU fuel control! The problem I was wondering about is that the ECU diagnostics have codes for improper operation of the O2 sensor, so why are no codes generated when it is disconnected?</p><p></p><p>What I am going to do is unplug the O2 sensor (PC III removed) and see if a code appears. If it does not, then the diagnostics are incorrect in the service manual because it should give a code 24.</p><p></p><p>24:</p><p>No normal signals are received from</p><p>the O2sensor.</p><p>• Open or short circuit in wiring harness.</p><p>• Defective O2sensor.</p><p>• Malfunction in ECU.</p><p>• Improperly installed sensor.</p></blockquote><p></p>
[QUOTE="Gitbox, post: 1247309, member: 86950"] Thanks for the responses, guys. [IMG]https://www.fjrforum.com/forum//public/style_emoticons/default/smile.png[/IMG] Queensland: the installation instruction page that you referred to is for Gen II FJRs, mine is a GEN I and those instructions make no mention of an O2 sensor. Fred: excellent description of ECU fuel control! The problem I was wondering about is that the ECU diagnostics have codes for improper operation of the O2 sensor, so why are no codes generated when it is disconnected? What I am going to do is unplug the O2 sensor (PC III removed) and see if a code appears. If it does not, then the diagnostics are incorrect in the service manual because it should give a code 24. 24: No normal signals are received from the O2sensor. • Open or short circuit in wiring harness. • Defective O2sensor. • Malfunction in ECU. • Improperly installed sensor. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
PC III and O2 Sensor Question
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