"P1590 ABS rough road signal circuit malfunction LR Description: Hardware is OK but SLABS ECU is sending an error signal"
I am throwing no ABS codes, and checked all wiring, connections, grounds and tapped the sensors to insure they were fully seated. I interpret the code as saying that all hardware is functioning normally, but the ABS ECU is sending a spurious signal to the engine management ECU. (This is a "P" code, not an ABS code) From my research the rough road circuit is designed to tell the ECU to disregard fluctuations in the crankshaft sensor so timing is not effected on rough roads. I have cleared mine several times, but it reappears after each drive cycle. In California, this code will cause you to fail the emissions test. Its the only DTC I have left to fix.
The code comes up on the search function, but no one ever discusses how, or if, they resolved the issue. I suspect, in the absence of a bad ground/ connection, the ABS ECU is toast.
Any help would be appreciated... Thanks
I am throwing no ABS codes, and checked all wiring, connections, grounds and tapped the sensors to insure they were fully seated. I interpret the code as saying that all hardware is functioning normally, but the ABS ECU is sending a spurious signal to the engine management ECU. (This is a "P" code, not an ABS code) From my research the rough road circuit is designed to tell the ECU to disregard fluctuations in the crankshaft sensor so timing is not effected on rough roads. I have cleared mine several times, but it reappears after each drive cycle. In California, this code will cause you to fail the emissions test. Its the only DTC I have left to fix.
The code comes up on the search function, but no one ever discusses how, or if, they resolved the issue. I suspect, in the absence of a bad ground/ connection, the ABS ECU is toast.
Any help would be appreciated... Thanks
