Problems with Tachometer and spedometer post swap
03-31-2009, 12:45 PM
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Problems with Tachometer and spedometer post swap
I made my 98 civic a manual with the same exact engine from a 99 civic and now some of my gauges are not working at all. The ecu I used came straight from the 99 civic along with the motor harness. Is this the issue? I still have the 98 atuo ecu. Is there anything special I have to make it work or am I using the wrong ecu/harness?
It really sucks not knowing exactly how fast I'm going when passing a speed trap set up by cops lol.
It really sucks not knowing exactly how fast I'm going when passing a speed trap set up by cops lol.
03-31-2009, 01:01 PM
#2
Re: Problems with Tachometer and spedometer post swap
Check whether fuse 25 under the dash is blown.
Also check the connectors and their pins at the rear of the gauge assembly.
Also check the connectors and their pins at the rear of the gauge assembly.
03-31-2009, 01:24 PM
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Re: Problems with Tachometer and spedometer post swap
Not at all. Which makes me think something is unplugged... or is the ecu or something.
I also found this:
Does it have anything to do with the speedometer because I can't find anything it plugs up to.
I also found this:
Does it have anything to do with the speedometer because I can't find anything it plugs up to.
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03-31-2009, 01:54 PM
#11
Re: Problems with Tachometer and spedometer post swap
The tach gets its signal from the ICM in the distributor. Check the blue wire and its connection there. It's also possible that the ICM needs to be replaced.
With respect to the speedometer problem, do the odometer and tripmeter work fine or not?
With respect to the speedometer problem, do the odometer and tripmeter work fine or not?
03-31-2009, 02:05 PM
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03-31-2009, 02:14 PM
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Re: Problems with Tachometer and spedometer post swap
The VSS was fine when the engine/tranny was in the other car. Fuse 15 is fine.
I'll check the ground for the VSS though
I'll check the ground for the VSS though
03-31-2009, 02:19 PM
#16
Re: Problems with Tachometer and spedometer post swap
VSS:
The Blk wire is ground.
The Blk/Yel wire is power.
The third wire sends speed signals to the gauge assembly and ECU. Check its continuity.
The Blk wire is ground.
The Blk/Yel wire is power.
The third wire sends speed signals to the gauge assembly and ECU. Check its continuity.
03-31-2009, 02:25 PM
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Re: Problems with Tachometer and spedometer post swap
I made my 98 civic a manual with the same exact engine from a 99 civic and now some of my gauges are not working at all. The ecu I used came straight from the 99 civic along with the motor harness. Is this the issue? I still have the 98 atuo ecu. Is there anything special I have to make it work or am I using the wrong ecu/harness?
Originally Posted by RonJ@HT
The tach gets its signal from the ICM in the distributor. Check the blue wire and its connection there.
03-31-2009, 02:29 PM
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Re: Problems with Tachometer and spedometer post swap
You have to use a '96 - '98 harness in a '96 - '98 cars or you will have these issues, you must also use a '96 - '98 distributor (the plugs are different between '96 - '98 and '99 - '00 D-series distributors)
'99 - '00 Civics (except HX coupes) get their tach signal from the ECU, the blue wire from the igniter is missing, '00 - '01 Integra are setup the same way as well.
'99 - '00 Civics (except HX coupes) get their tach signal from the ECU, the blue wire from the igniter is missing, '00 - '01 Integra are setup the same way as well.
03-31-2009, 02:37 PM
#21
Re: Problems with Tachometer and spedometer post swap
In this case, the OP should look for continuity on the blue wire between the ECU and tach in the gauge assembly. It's also possible that the tach itself is bad.
03-31-2009, 02:53 PM
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Re: Problems with Tachometer and spedometer post swap
03-31-2009, 03:01 PM
#23
Re: Problems with Tachometer and spedometer post swap
Using the harness and ECU the OP has will result in just exactly whats happening here. There really isn't any point in investigating any further. Posted below is a comparison of OBD2A and OBD2B harnesses, pay close attention to the green plug, this is what connects the engine harness to the underdash harness, note how the OBD2B green plug uses fewer wires, theres a reason for this.
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