I have no speedometer operation
Previously had a PO500 VSS code, found bad LF ABS sensor, replaced and code gone. Also have ABS and Brake light on constant with no communication with ABS-CU. I have run powers and ground tests at ABS-CU, all tests good per flow chart. Have also tried 2 separate used ABS-CU from salvage yard. and swapped instrument cluster with known good cluster from a working vehicle. The vehicle speed signal does not come from speed sensor in transmission!!!!( that is because it has ABS, and the sensor in trans. is a dummy sensor with no terminals or connector?
Cars & Trucks - Mazda - MPV - 2000 Mazda MPV
Answers & Comments
If you pulled a code from the ABS system, then you have communications at the DLC. If you pulled a communications code from the PCM/cluster. You have communication there also. All the systems like this I have seen. The ABS sends the signal to the PCM. PCM sends it to the cluster. I am assuming you have electrical diagrams/pinouts. Check the continuity of the data wire from the ABS to PCM or cluster.
I haven't worked on the Mazdas, But I have a ford van set up like your describing. The speedo works off the wheel sensors, not the transmission. My ABS module died and took the speedo with it. It also popped the ABS and Brake lights on.
Randy, I emailed you the schematics, subject line is, Mazda MPV wiring diagrams. Thanks for the assistance
HiChuck, The link below is a youtube video showing how to fix the speedo on your car.....CHEERS..
Fixing The Speedometer On Your Car
not the least bit helpful in this application.