Help please! Drive circuit problem/ temp gauge not working-03 civic ex A/T
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Help please! Drive circuit problem/ temp gauge not working-03 civic ex A/T
Hey there, new here looking for help desperately! I’m having a really hard time figuring out my problem, it’s an 03 civic ex A/T.
I had a dead battery, so i got a new one, cleaned all grounds in engine bay before installing it. Started up fine, let it warm up and noticed my temp gauge wasn’t registering. So I replaced my thermostat with a new Honda part, refilled/bled air from coolant. Still no temp, replaced ECT, and thermo fan switch re bled it, still no temp.
I had voltage at the ECT connector, and ground. Did a bunch of continuity probing from ECT to ECM, ECM to cluster vice versa. I was having trouble because I couldn’t find the grn/yel and red/whit wires from ECT at the cluster connector/terminals. I’m not sure which wires power the temp gauge in the cluster, I’m guessing they must change to a different color between the ecm and cluster somewhere?
So then I ran the diagnostic test on the cluster.
The first diagnostic came back ok and everything worked, but I forgot the drive circuit check/ comm line check. I then did it again, and all gauges worked fine but during the drive circuit check I got an ERROR.
I have no D,D2, or D3 drive indicator lights as well. Also I was continuity testing between the ECM and cluster, on what I believe was the comm line wht/grn at the cluster connector, and wht/grn at ECM connector A, terminal 18 for the VSS. I was going off of an ECM pin out I found on this site. I couldn’t find/don’t have a pin out for cluster terminals. But I was getting a strange tone when probing this. Was a loud constant beep, but sounded different than the normal tone for continuity. I don’t know what this means.
From what I understand the VSS is at the end of my drive circuit. Is this the potential cause for no drive indicators/ drive circuit error? And would that in turn effect my ECM from relaying temp data to the cluster? If anyone can give me any direction on this I’d appreciate greatly, I only partially know what I’m doing! Sorry for the long post, thanks in advance!
I had a dead battery, so i got a new one, cleaned all grounds in engine bay before installing it. Started up fine, let it warm up and noticed my temp gauge wasn’t registering. So I replaced my thermostat with a new Honda part, refilled/bled air from coolant. Still no temp, replaced ECT, and thermo fan switch re bled it, still no temp.
I had voltage at the ECT connector, and ground. Did a bunch of continuity probing from ECT to ECM, ECM to cluster vice versa. I was having trouble because I couldn’t find the grn/yel and red/whit wires from ECT at the cluster connector/terminals. I’m not sure which wires power the temp gauge in the cluster, I’m guessing they must change to a different color between the ecm and cluster somewhere?
So then I ran the diagnostic test on the cluster.
The first diagnostic came back ok and everything worked, but I forgot the drive circuit check/ comm line check. I then did it again, and all gauges worked fine but during the drive circuit check I got an ERROR.
I have no D,D2, or D3 drive indicator lights as well. Also I was continuity testing between the ECM and cluster, on what I believe was the comm line wht/grn at the cluster connector, and wht/grn at ECM connector A, terminal 18 for the VSS. I was going off of an ECM pin out I found on this site. I couldn’t find/don’t have a pin out for cluster terminals. But I was getting a strange tone when probing this. Was a loud constant beep, but sounded different than the normal tone for continuity. I don’t know what this means.
From what I understand the VSS is at the end of my drive circuit. Is this the potential cause for no drive indicators/ drive circuit error? And would that in turn effect my ECM from relaying temp data to the cluster? If anyone can give me any direction on this I’d appreciate greatly, I only partially know what I’m doing! Sorry for the long post, thanks in advance!
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