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14.3a Heated Seats (HS)   >   11 Diagnosis - Function Test

Preparation for Test: The switches (left/right) for the front heated seats are integrated into the Front HS Control Module (N25/5). The control module can only be replaced as a complete unit. 1. Review section , 20, 22, 23 2. Review following documents in WIS: GF00.19-P-1000A. Also review ETM documents: PE91.00-P-1100B (model 170), PE91.00-P-1100D Models 208, 202) and PE91.00-P-1100A (model 210). Test step/Test scope Test condition Nominal value Possible cause/Remedy 1) 1.0 Seat heating stage I Ignition: ON Press front of left front HS switch (N25/5s1) or right front HS switch (N25/5s2), respectively. 1 LED in switch will iluminate. Seat cushion and backrest cushion will warm up. 23 1.0, 5.0, 7.0 2.0 Seat heating stage II Ignition: ON Press rear of left front HS switch (N25/5s1) or right front HS switch (N25/5s2), respectively. 2 LED'S in switch will illuminate. Seat cushion and backrest cushion will warm up noticeably more than stage I. 23 1.0, 5.0, 7.0 3.0 Dimming of indicator lamps in stages I or II Ignition: ON Seat heaters switched on. Parking lamps switched on. LED'S for stage I or II light up brightly. LED'S become dimmer (based on adjustable cockpit illumination). 23 1.0 23 2.0, 3.0, 4.0 1) Observe Preparation for Test, see 22.