PSM 05 911 Turbo (996)45 · Work instruction Display OK

PSM 05 911 Turbo (996)45 Work instruction Display OK If not OK 3 Check level switch ♦Measure resistance between ter- approx. 100 Ω (at ♦< 100 Ω minal 1 of brake fluid level 20 °C) Short circuit in cir- switch socket and terminal 2 of ⇒ Step 4 cuit between brake brake fluid level switch socket fluid level switch ter- minal 1 and brake fluid level switch ter- minal 2 ♦ Open circuit between brake fluid level switch termi- nal 1 and brake fluid level switch termi- nal 2 → End 4 Check signal lead of the ♦Pull off the PSM control module < 5 Ω Open circuit level switch plug ⇒ Step 5 between PSM con- trol module plug ter- ♦Measure resistance between minal 36 and brake PSM control module plug termi- fluid level switch ter- nal 36 and brake fluid level minal 1 switch terminal 1 → End 5 Check signal lead of the ♦Pull off plug II on the instrument < 0.3 V Short circuit to volt- level switch for short cir- cluster ⇒ Step 6 age between PSM cuit to B+ control module plug ♦Switch on ignition terminal 36 and ♦Measure voltage between PSM brake fluid level control module plug terminal 36 switch terminal 1 and ground and instrument clus- ter plug terminal II/4 → End 6 Check signal lead of the ♦Switch off ignition > 500Ω Short circuit to level switch for short cir- ⇒ Step 7 ground between ♦Measure resistance between cuit to ground PSM control mod- PSM control module plug termi- ule plug terminal 36 nal 36 and ground and brake fluid level switch terminal 1 and instrument clus- ter plug terminal II/4 → End 7 PSM control module faulty → End 45-25 page 2 4503 Fault code 4281 4281ps05 Printed in Germany – 4, 2001