Help with speed sensor
#1
Help with speed sensor
I am running an Elite 2500 on my 95 USDM Rx-7.
The Haltech is not reading the drive train sensor (transmission output speed). The speedometer on the dash works fine as before, but the haltech is not reading the signal. This is causing all sorts of tuning issues.
I have a custom wiring harness, built by my tuner. Everything on the harness is plug and play, except having to splice these wires on the cabin side into the harness (pictured below). As you can see the speed signal from cluster 1M is wired to SPI 1 which is the correct input. I am really stumped on this one. Any advice would be helpful.
The Haltech is not reading the drive train sensor (transmission output speed). The speedometer on the dash works fine as before, but the haltech is not reading the signal. This is causing all sorts of tuning issues.
I have a custom wiring harness, built by my tuner. Everything on the harness is plug and play, except having to splice these wires on the cabin side into the harness (pictured below). As you can see the speed signal from cluster 1M is wired to SPI 1 which is the correct input. I am really stumped on this one. Any advice would be helpful.
#2
Rotorhead for life
iTrader: (4)
I am running an Elite 2500 on my 95 USDM Rx-7.
The Haltech is not reading the drive train sensor (transmission output speed). The speedometer on the dash works fine as before, but the haltech is not reading the signal. This is causing all sorts of tuning issues.
I have a custom wiring harness, built by my tuner. Everything on the harness is plug and play, except having to splice these wires on the cabin side into the harness (pictured below). As you can see the speed signal from cluster 1M is wired to SPI 1 which is the correct input. I am really stumped on this one. Any advice would be helpful.
The Haltech is not reading the drive train sensor (transmission output speed). The speedometer on the dash works fine as before, but the haltech is not reading the signal. This is causing all sorts of tuning issues.
I have a custom wiring harness, built by my tuner. Everything on the harness is plug and play, except having to splice these wires on the cabin side into the harness (pictured below). As you can see the speed signal from cluster 1M is wired to SPI 1 which is the correct input. I am really stumped on this one. Any advice would be helpful.
In my case, after I wired my car, the dash speedo worked perfectly as it did before, and the speed sensor was being "seen" by the ECU, but the speed being displayed on my laptop with the PCLink ECU tuning software was WAY off from reality - pulling out of my driveway it would read like 80MPH, when I was doing maybe 10. To calibrate the speed sensor to the Link ECU, I had to go thru a specific procedure that you can be done on the fly with a helper driving the car, or by taking logs & adjusting settings after the fact, then re-doing to verify the calibration. The calibration procedure involved driving at a steady, known speed (use your speedo or GPS/phone app for "truth data") for a minute or two, and then adjust a frequency scaling factor in the ECU's tuning software menu that is associated with the digital input used fro the speed sensor. Get the scaling factor right, and the ECU's displayed speed will match ground truth.
#3
Update: I had tried multiple times to recalibrate the ECU for the sensor, but it was not getting a signal at all. During one of these sessions, trying to recalibrate I had the cruise control on and voila! it works, but only while the cruise button on the top right of the cluster is turned on. The cruise does not have to be set it just has to be ready.
Guess the next question is, how do I get it to work without the cruise control button depressed?
Guess the next question is, how do I get it to work without the cruise control button depressed?
#4
Rotorhead for life
iTrader: (4)
Update: I had tried multiple times to recalibrate the ECU for the sensor, but it was not getting a signal at all. During one of these sessions, trying to recalibrate I had the cruise control on and voila! it works, but only while the cruise button on the top right of the cluster is turned on. The cruise does not have to be set it just has to be ready.
Guess the next question is, how do I get it to work without the cruise control button depressed?
Guess the next question is, how do I get it to work without the cruise control button depressed?
As you can see in the yellow highlighted paths, the 2 terminals coming from the OEM speed sensor are tapped to connect to: (1) one of my Link's digital inputs (DI1) and (2) to the Link's Sensor Ground (GND) before going into the OEM harness at the X14 connector (Y/R and Y/W wires on X14 of OEM Dash harness), which in turn routes to the instrument cluster to drive the speedo & cruise functions. The blue highlighted OEM connectors are the speed sensor (C1-08) and the X14 OEM interface connector, which connects the OEM ECU/emissions (EM) harness to the Dash (D) harness.
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