# Which test connector is it which on 1994 Honda Civic DX? **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [October 28, 2007, 4:28pm UTC](https://community.cartalk.com/t/which-test-connector-is-it-which-on-1994-honda-civic-dx/6527 "2007-10-28T16:28:24Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![hellokit](https://avatars.discourse-cdn.com/v4/letter/h/6a8cbe/32.png) [@hellokit](https://community.cartalk.com/u/hellokit)\ **Post date:** [October 28, 2007, 4:28pm UTC](https://community.cartalk.com/t/which-test-connector-is-it-which-on-1994-honda-civic-dx/6527/1 "2007-10-28T16:28:24Z")
On this 1994 Honda Civic, the Haynes repair manual has a black and white photograph which shows the DLC (Data Link Connector) as a two-pin connector to jumper to cause the check engine light to flash trouble codes. The wiring diagram shows the DLC having THREE wires: One has power, one goes to ground, and one goes to the PCM (engine computer). /// Under the right corner of the dash are two BLUE connectors, a two-pin, and a three-pin. Their wire colors do not match the colors on the wiring diagrams for the DLC, nor the SRS (air bag) “SCS Service Check Connector”. I DO NOT want to, haphazardly, put multimeter test voltage into the SRS system, in an effort to find where the wires go, if the connectors are SRS connected. Resolution? ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [October 28, 2007, 6:45pm UTC](https://community.cartalk.com/t/which-test-connector-is-it-which-on-1994-honda-civic-dx/6527/2 "2007-10-28T18:45:25Z")
Your first mistake is believing a wiring diagram out of a Haynes manual. These manuals aren’t very accurate when it comes to wiring diagrams. They sometimes don’t even show electrical components that are in the circuit. Been burned by that a couple of times. Everything I have shows you jump the two pin connector to get the Check Engine light to flash DTC’s. They even warn you not to jump the three pin SRS connector. Tester ---
**Author:** ![keith](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/keith/32/5518_2.png) [@keith](https://community.cartalk.com/u/keith)\ **Post date:** [October 28, 2007, 6:46pm UTC](https://community.cartalk.com/t/which-test-connector-is-it-which-on-1994-honda-civic-dx/6527/3 "2007-10-28T18:46:23Z")
We had a 93 Civic once and the P2 connector had two wires to it and if I remember right, it also had a dust cover. ---
**Author:** ![hellokit](https://avatars.discourse-cdn.com/v4/letter/h/6a8cbe/32.png) [@hellokit](https://community.cartalk.com/u/hellokit)\ **Post date:** [October 29, 2007, 3:16am UTC](https://community.cartalk.com/t/which-test-connector-is-it-which-on-1994-honda-civic-dx/6527/4 "2007-10-29T03:16:02Z")
I did further research, and it seems like it’s a confusion of terms. The blue two-pin connector is the “service check connector” which one jumpers which causes, both, the check engine light and the SRS light to flash their respective trouble codes. The three-pin DLC (DATA Link Connector) is, evidently, for use with a Honda scan tool. On other OBD1 (On-Board Diagnostic) cars, two DLC terminals are jumpered to cause the check engine light to flash the engine trouble codes. The DTC code flashed by the SRS was DTC 1-1 “Open in the driver’s airbag inflator, or increased resistance”. Possible cause, somebody installed (messily) a Viper 1 Security System.