WIS Document: 4877

| | P1830 Transmission shifting function faulty Fault symptoms CHECK GEARBOX indicator lamp on. The system's emergency operation program has been activated. Conditions The car's speed is higher than 25 km/h and the last gear shift took place more than 5 seconds ago. The difference in rpm should then not be more than 3%% and no longer than 1 second. Diagnostic help The control module calculates the ratio between the input and output gearbox speeds. There is a predetermined gear ratio for each gear. The fault indicates a mechanical malfunction but first check the grounding points G2, G4, G25 and G33S/P before commencing mechanical fault diagnosis. Wear in the gearbox can result in rough gear changing and lock-up malfunction. Diagnostic procedure 1 Check the fault symptom Check the problem by driving the car as shown in the road test schedule, see . Note any fault symptoms. Are there any fault symptoms? | yes Continue with and then step 2. | no Continue with step 2. 2 Final check Clear the diagnostic trouble code. Drive the car on test at varying engine loads and speeds so that upshifts and downshifts through all the gears, with and without kick-down, are performed. Obtain readouts of any diagnostic trouble codes that are generated. Does the diagnostic trouble code recur? | yes Continue with . | no The remedial action taken was correct.