I have a 2207 Hyundai Veracruz AWD with 189K miles. Recently the ESC off, ABS and AWD lights all came on. They go out occasionally, but typically come back on within a short period of time. I replaced the brake switch with one from AutoZone.
I brought it into the dealer and the tech wrote the following.
found related dtcs for loss of com with abs set in history. Traced abs concern and found unable to communicate with abs module. Traced to loss of module ign power signal at ecu. Verified fuse. Found condition due to intermittent connection internal in wiring harness. Direct powdered the module and verified com present and found P1753 still sets and no sensor operation or right rear sensor. Fault internal in harness, harness no longer available. Would need to tear down main harness locate fault and repair. Rear sensor fault may also be related to wiring or may be faulty sensor.
So my question is, when he says “Traced to loss of module ign power signal at ecu”, does he mean the abs module? I’m not sure if he’s using the term ecu to refer to the abs module or if he means the engine control unit. I believe the engine control unit is on the passenger side engine compartment next to the relay block an it’s still covered in dust. So I doubt he did any work in that module.
I’m hoping I can just run a new fused ignition wire to whichever module he’s talking about