Work instruction Display OK If not OK · 8 Check CAN bus between ♦Switc

911 Turbo (996) PSM 05 45 Work instruction Display OK If not OK 8 Check CAN bus between ♦Switch off ignition ∞ Ω Short circuit to DME control module, ⇒ Step 9 ground in CAN wir- ♦Measure resistance between instrument cluster, PSM ing harness DME control module plug pin control module and PSM between DME con- D37 and ground steering-angle sensor for trol module plug pin short circuit to ground D37, instrument cluster plug pin A31, PSM control module plug pin A40 and PSM steer- ing-angle plug pin A1 → End 9 Check CAN bus between ♦Measure resistance between ∞ Ω Short circuit to DME control module, DME control module plug pin ⇒ Step 10 ground in CAN wir- instrument cluster, PSM D36 and ground ing harness control module and PSM between DME con- steering-angle sensor for trol module plug pin short circuit to ground D36, instrument cluster plug pin A15, PSM control module plug pin A24 and PSM steer- ing-angle plug pin A2 → End 1 Check CAN bus between ♦Measure resistance between ∞ Ω Short circuit in CAN 0 DME control module, DME control module plug pin ⇒ Step 11 wiring harness instrument cluster, PSM D36 and DME control module → End control module and PSM plug pin D37 steering-angle sensor for short circuit 1 Check control units ♦Push on all control module plugs Replace the last control module to be dis- 1 connected ♦Disconnect the control modules → End one after the other and check whether the "CAN data bus (drive)" fault has been remedied 4503 Fault code 5520 45-44 page 3 Printed in Germany – 5, 2001 5520ps05