72-28Fault code 24 · Pot. mirror left vertical - open circuit

911 Turbo (996) Seat memory S02 72 72-28Fault code 24 Pot. mirror left vertical - open circuit Diagnostic conditions • Ignition on • Switch for memory seat adjustment actuated Possible cause of fault ♦Open circuit in supply lead to pot. for left rearview mirror ♦Potentiometer faulty ♦Control module faulty Affected terminals Plug 7, terminals 4, 5 and 11 Diagnosis/troubleshooting Work instruction Display OK If not OK 1 Check 5V supply voltage ♦Switch off ignition approx. 5V ⇒ Step 4 of the "carrier with gear ⇒ Step 2 ♦Pull off plug on "carrier with unit" gear unit" ♦Switch on ignition ♦Measure voltage between pin 3 and ground 2 Check ground lead of the ♦Measure voltage on plug of the approx. 5V ⇒ Step 7 "carrier with gear unit" "carrier with gear unit", ⇒ Step 3 between pins 3 and 7 3 Check signal lead of the ♦Select "Voltage of left mirror 0V without jumper ⇒ Step 8 "carrier with gear unit" potentiometer" in menu item Approx. 5 V with "Actual values" jumper ⇒ Step 11 ♦Connect jumper between pins 3 and 5 4 Check 5V supply lead for ♦Switch off ignition ∞ Ω Repair wiring har- short to ground ⇒ Step 5 ness ♦Pull off mirror plug on control → End module ♦Measure the resistance between plug on carrier pin 3 and ground ♦Measure the resistance between plug on carrier pin 3 and pin 7 7298 Fault code 24 72-28 page 1 Printed in Germany – 3, 2001 24xxxS02