Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
this car got towed from another shop its a2017honda civic 2.0 it wont crank i tested the wire from relay moduale in fuse box grey it cranks when adding power i have crank sense at relay box from ignition .i think they put a used relay box it sit in fuse box it can slide out with 3plugs it has a circuit board inside does it need to be programed.any help would be great
ok here is were im at got immobalizer fixed did a systeme check with autel ultra it says its normal no codes for security now .now if i power grey wire with power probe it starts.won t come out of park and wont crank with key
Ronald. Due to you confirmed that when you power grey wire it not only cranks but it starts, we can assure PCM is powering sensors (5v reference is on).
*When you power grey wire (A2 relay terminal), you are bypassing relay and directly powering starter solenoid.
*A5 relay terminal is the ground of relay coil (which is connected to groung through range switch on Park or Neutral).
*A1 relay terminal is power ignition, which feeds power not only for relay coil but relay contact which feed starter solenoid (when relay is active). have you checked for this voltage when ignition switch on start (only when cranking)?
EX sub model has Keyless Access System so I think it has another relay in addition to the one you just checked. The two relays must both be energized by the PCM for the load side contacts, which are wired in series, to send voltage to the starter solenoid.Check for power on B4 and ground on A4, while cranking
Try hitting it while cranking? The diagram of the terminals can get confusing in these. They can be from the back side of the connector or the front so I'd check them both ways to make sure SI is correct.
Anything else not working besides the starter? Rear brake lights, truck/ceiling light, power to ignition coil and injectors and windshield squirter? Are the terminals clean and tight? If the relay ground controls are present from the PCM in the connector, but no continuity in the relay I think you're going to have to get your hands on a replacement or perhaps you may resort to opening this box up who knows, maybe a solder reflow is in order? Crack it open and show us pics if you can
