When performing a B-series engine swap into an OBDa\/b Civic hatchback and retaining a U.S. OBD2 ecu is necessary, swappers will need to wire in the 2nd 02 sensor in order to please the ecu.<\/p>\n
This is the case for people who are running an EX or Si harness in an EK hatchback, coupe, or sedan for their swap. \u00c2\u00a0The EX and Si engine harnesses do not have<\/strong> the 2nd 02 sensor integrated into the engine harness, but rather into the cabin harness of the EX & Si chassis’s. Whereas, the the non-VTEC engine harness has the 2nd 02 sensor integrated into the engine harness itself<\/span>.<\/p>\n All that is required is to extend the 2nd 02 wiring to reach the 2nd 02 sensor when using a non-VTEC harness. \u00c2\u00a0Not such the case for Si & EX harness users; they will manually have to wire in the 2nd 02 sensor directly to the respective ecu connectors.<\/p>\n Here’s the pin locations:<\/p>\n When performing a B-series engine swap into an OBDa\/b Civic hatchback and retaining a U.S. OBD2 ecu is necessary, swappers will need to wire in the 2nd 02 sensor in…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[48,17],"tags":[55,53,52,56,54],"class_list":{"0":"post-395","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-b-series","7":"category-ecu-wiring","8":"tag-55","9":"tag-2nd-02","10":"tag-obd2","11":"tag-oxygen-sensor","12":"tag-secondary"},"_links":{"self":[{"href":"https:\/\/ff-squad.com\/technet2\/wp-json\/wp\/v2\/posts\/395","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ff-squad.com\/technet2\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ff-squad.com\/technet2\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ff-squad.com\/technet2\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ff-squad.com\/technet2\/wp-json\/wp\/v2\/comments?post=395"}],"version-history":[{"count":0,"href":"https:\/\/ff-squad.com\/technet2\/wp-json\/wp\/v2\/posts\/395\/revisions"}],"wp:attachment":[{"href":"https:\/\/ff-squad.com\/technet2\/wp-json\/wp\/v2\/media?parent=395"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ff-squad.com\/technet2\/wp-json\/wp\/v2\/categories?post=395"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ff-squad.com\/technet2\/wp-json\/wp\/v2\/tags?post=395"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}\n\n
\n OBD2a\u00c2\u00a0<\/span><\/span><\/strong><\/td>\n <\/td>\n <\/td>\n<\/tr>\n \n 2nd 02 Sensor<\/span><\/strong><\/td>\n <\/td>\n ECU Connector<\/strong><\/span><\/td>\n<\/tr>\n \n White Wire<\/td>\n \u00c2\u00a0\u00c2\u00a0 TO<\/td>\n D14 – Sensor Heater 02 Signal (SH02S)<\/td>\n<\/tr>\n \n Green Wire<\/td>\n \u00c2\u00a0TO<\/td>\n D11 – Sensor Ground 2 (SG2)<\/td>\n<\/tr>\n \n Black Wire<\/td>\n \u00c2\u00a0TO<\/td>\n A5 – Secondary Heater 02 Control (S02HTC)<\/td>\n<\/tr>\n \n Black Wire<\/td>\n \u00c2\u00a0TO<\/td>\n A11 – Power Source 1 (1GP1)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \n\n
\n OBD2b<\/span><\/strong><\/span><\/td>\n <\/td>\n <\/td>\n<\/tr>\n \n 2nd 02 Sensor<\/span><\/strong><\/span><\/td>\n <\/td>\n ECU Connector<\/strong><\/span><\/td>\n<\/tr>\n \n White Wire<\/td>\n \u00c2\u00a0TO<\/td>\n A23 – Sensor Heater 02 Signal (SH02S)<\/td>\n<\/tr>\n \n Green Wire<\/td>\n \u00c2\u00a0\u00c2\u00a0 TO<\/td>\n C18 – Sensor Ground 2 (SG2)<\/td>\n<\/tr>\n \n Black Wire<\/td>\n \u00c2\u00a0TO<\/td>\n A8 – Secondary Heater 02 Control (S02HTC)<\/td>\n<\/tr>\n \n Black Wire<\/td>\n \u00c2\u00a0TO<\/td>\n B1 – Power Source 1 (1GP1)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"