The cigarette lighter is typically used to power the vehicles system for communicating with testing equipment in most vehicles. OBD2 Has Power but Won't Connect: What to Do? (Explained!) I've gone through the pins and found this out Pin 4 and 5 are working fine Pin 16 has full battery power Pin 14 and 6 have 2.5v coming out Many a good tech has been caught out by jumping the gun and calling a perfectly good controller faulty, only to find the problem is still present with a shiny new spendy one installed. Saturday, November 17th, 2018 AT 12:29 PM. Learn the causes and how to fix them below. This, of course, is only possible if you have a good working wiring diagram. Many tools offer free software upgrades. Cig lighter works but obd2 still doesnt. By specification, every OBDII connector must have 12-v power on pin 16 and ground on pins 4 and 5. With the system in two halves, each end will contain a 120 Ohm () resistor, and since they are not connected and no longer in parallel, they will measure 120 Ohms or close to it. OBDII runs on same circuitry as GMLan and your GMLan obviously works because your car is not in limp mode. His in-depth OBD review articles help people choose the right product, whether it is a European, American, or Asian vehicle. I Turn Car Off Starts Fine, But When It Gets To 50 Mph Iit Happens Again. I replaced it and now the light stays on. It is an Action Autoscanner Plus (CP9580A). Feb 20, 2007. Some may be more challenging than others, not because of complexity but because some controllers may be difficult to access. However, you may save a great deal of money, time, and effort by being aware of the probable reasons of this problem. I Tried To Get My Saturn Inspected Yesterday, But It Had Been Sitting In Front Of My Parents House Unused For 3 Months And The Battery Was No Power, Push On Gas The Rpm's Go Down. Use the min-max voltmeter function to capture the max voltages and min voltages. Try logging on to your scan tool makers website. So, to summarize, the OBD2 is a vital tool for auto diagnostics. I read at obdii site that some obd2 it's not a real obd2 compatible and this type comes at older model around 1991 - 1996 . I have voltage on these line. If there's oil there it indicates the sensor is dead or soon will be. obd ii won't connect! - AudiWorld Forums I suggest you check fuse 29 very carefully. Innova VS Autel: Comparing 4 scan tool(2 from each brand), Foxwell NT624 Review 2022: Car All-Systems Diagnostic Scan Tool, Konnwei KW808 Reviews 2022: OBDII/EOBD code reader & auto scanner, Autel Maxicheck Pro Reviews: OBD2 for EPB/ABS/SRS/SAS/Airbag, Innova 3120 Review 2022 for OBD1 & OBD2 Vehicles(latest 3120e, 3120f), Autel Maxisys Elite Review 2022: Most Advanced Diagnostic Tool, Ancel AD310 Reviews 2023: Classic OBDII Car Engine Fault Code Reader, FOXWELL NT630 Review 2022: Plus Automotive ABS Scanner, Foxwell NT510 Review 2022: Automotive Scanner for ABS/SRS/EPB/Transmission, Foxwell NT301 Review 2022: Car obd2 Code scanner, Bluedriver OBD2 Reviews 2023: Professional Bluetooth Scanner.