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ENGINE MANAGEMENT SYSTEM - V8 DESCRIPTION AND OPERATION 18-2-51 Should a malfunction of the rough road signal occur, the following fault codes may be evident and can be retrieved Hill Descent Control (HDC) signal Function The HDC signal can fail in the following ways: l Harness or connector damage A HDC signal failure may be evident from the following: l HDC / ABS warning light on l HDC inoperative l Audible warning Should a malfunction of the HDC signal occur, the following fault codes may be evident and can be retrieved by Low fuel level signal Conditions ± 8 ohms. P Code J2012 Description Land Rover Description P1590 ABS rough road signal circuit malfunction Hardware is OK, but SLABS ECU is sending an error P1591 ABS rough road signal circuit low Signal from SLABS ECU short circuit to earth P1592 ABS rough road signal circuit high Signal from SLABS ECU short circuit to vehicle battery P Code J2012 Description Land Rover Description P1663 Throttle angle/Torque signal circuit malfunction SLABS HDC link open circuit P1664 Throttle angle/Torque signal circuit low SLABS HDC link short circuit to ground P1665 Throttle angle/Torque signal circuit high SLABS HDC link short circuit to battery voltage |