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ZF AUTO 25 DESCRIPTION AND OPERATION Fault effects and warning indicators - Petrol vehicles from 99MY (continued) Fault code OBDll (TestBook) Fault description Effect MIL Warning lamp ’GEARBOX FAULT’ message P1843 (17) * CAN time-out monitoring Maintains current gear in low range, limp home mode in high range. Shift pressure to maximum, harsh gear shifts/engagement. On Yes P1884 (11) * CAN message: Engine friction invalid No apparent effect. On No P1884 (18) * CAN message: Throttle position invalid Substitute throttle angle of 50% adopted. No kickdown. Operates in Economy mode only. On Yes P1884 (19) CAN message: Engine temperature invalid Substitute engine temperature derived from other inputs. No apparent effect. On No P1884 (20) CAN message: Road speed invalid No apparent effect. On No P1884 (33, 34) CAN message: Engine torque invalid Substitute engine torque derived from other inputs. May affect shift quality. On No P1884 (35) CAN message: Engine speed invalid Maintains current gear in low range, limp home mode in high range. Shift pressure to maximum, harsh gear shifts/engagement. On Yes P1884 (37) CAN message: Engine air intake temperature invalid No apparent effect On No P1884 (38) Altitude shift control invalid No reduced torque compensation, possible reduction in performance/driveability at altitude or high ambient temperatures. On No *= Emissions (OBDll) relevant †= MIL illuminates immediately (in all other faults, MIL on illuminates in the 2nd consecutive drive cycle if the fault is still present) |