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Switch position implausible: Diagnosis/troubleshooting

WARNING: This page is about a different variant/trim than selected.
CAUTION: Risk of damage to convertible top parts and tools due to improperly installed and secured parts and tools. Attach test adapter with cables and convertible top control unit in the vehicle in such a way that nothing is brushed against or trapped when the convertible top mechanism is opened or closed!
NOTE:
  • Before starting the troubleshooting from step 17 to step 39, connect special tool 45-pin test adapter 9636 to the convertible- top control unit in such a way that the convertible top can be opened and closed completely while the tool is attached. The 88-pin test adapter cable 9616 and convertible-top control unit must be accessible in the passenger compartment!
  • To do this, remove the panelling behind the rear seat backrests and guide the cable for the 45-pin test adapter 9636 and the control unit for the convertible top through the centre of the auxiliary frame for the roll-over protection strap into the passenger compartment. The 45-pin test adapter 9636 can be connected in place of the convertible-top control unit while the convertible-top control unit is attached in the passenger compartment!
NOTE:
  • After a fault has been rectified, the following steps must be carried out:
  • the electrical connections need to be restored;
  • the fault memory must be cleared;
  • the diagnostic conditions must be met;
  • the fault memory must be read out again;
  • and, if necessary, any new fault that should occur must be located and rectified!
DIAGNOSIS/TROUBLESHOOTING FOR FAULT CODE 1, STEPS 1 TO 14

Work instruction Display OK If not OK
1 Check extended fault memory
  • Using the Porsche System Tester II 9588, select the extended fault memory in the menu item Fault memory by pressing "F8"
  • None of the following combinations is displayed:
    • Closure locked and closure unlocked
    • Side flap top right and side flap bottom right
    • Side flap top left and side flap bottom left

Step 2
  • The basic conditions indicate:

    Closure locked and closure unlocked Step 17

  • The basic conditions indicate:

    Side flap top right and side flap bottom right Step 20

  • The basic conditions indicate:

    Side flap top left and side flap bottom left Step 25
2 Preparatory work for steps 3 to 10:
  • Ignition on
  • Close convertible top completely until it has reached its final position
  • Connect Porsche System Tester II 9588 and call up the Input signals menu

Select and call up the following 9 input signals:
  • Closure locked.
  • Closure unlocked.
  • Convertible top
  • Convertible-top compartment lid
  • Side flap top right
  • Side flap bottom right
  • Side flap top left
  • Side flap bottom left
  • Latching hook
 Step 3
3 Check closure input signals when convertible top is closed
  • Check switch positions for closure locked and closure unlocked
  • Switch positions indicate:

    Closure locked (switch closed) and closure not unlocked (switch open)


Step 4
  • Switch positions indicate:

    Closure locked (switch closed) and closure unlocked (switch closed)


Step 17
4 Check right side flap input signals when convertible top is closed
  • Check switch positions of flap side flap top right and side flap bottom right
  • Switch positions indicate:

    Side flap not top right (switch open) and and side flap bottom right (switch closed)


Step 5
  • Switch positions indicate:

    Side flap top right (switch closed) and side flap bottom right (switch closed)


Step 20
5 Check left side flap input signals when convertible top is closed
  • Check switch positions of flap side flap top left and side flap bottom left
  • Switch positions indicate:

    Seitenklappe links nicht oben (Schalter offen) und Seitenklappe links unten (Schalter geschlossen)


Schritt 6
  • Switch positions indicate:

    Side flap top left (switch closed) and and side flap bottom left (switch closed)


Step 25
6 Check convertible-top compartment lid input signal when convertible top is closed
  • Check switch position of convertible-top compartment lid
  • Switch positions indicate:

    Convertible-top compartment lid locked (switch open)


Step 7
  • Switch positions indicate:

    Convertible-top compartment lid unlocked (switch closed)


Step 30
7 Check convertible top and latching hook input signals when convertible top is closed
  • Check switch positions for convertible top and latching hooks
  • Switch positions indicate:

    Convertible top not raised (switch open) and latching hooks actuated (switch open)


Step 8
  • Switch positions indicate:

    Convertible top raised (switch closed) Step 32

  • Switch positions indicate:

    Latching hooks not actuated (switch closed)


Step 36
8 Check closure input signals when convertible top is opened
  • Open convertible top completely until it has reached its final position
  • Check switch positions for closure locked and closure unlocked
  • Switch positions indicate:

    Closure locked (switch closed) and closure not unlocked (switch open)


Step 9
  • Switch positions indicate:

    Closure locked (switch closed) and closure unlocked (switch closed)


Step 17
9 Check right side flap input signals when convertible top is opened
  • Check switch positions of flap side flap top right and side flap bottom right
  • Switch positions indicate:

    Side flap not top right (switch open) aund and side flap bottom right (switch closed)


Step 10
  • Switch positions indicate:

    Side flap top right (switch closed) and Side flap bottom right (switch closed)


Step 20
10 Check left side flap input signals when convertible top is opened
  • Check switch positions of flap side flap top left and side flap bottom left
  • Switch positions indicate:

    Side flap top left (switch closed) and and side flap not bottom left (switch open)


Step 11
  • Switch positions indicate:

    Side flap top left (switch closed) and and side flap bottom left (switch closed)


Step 25
11 Check convertible-top compartment lid input signal when convertible top is opened
  • Check switch position of convertible-top compartment lid
  • Switch positions indicate:

    Convertible-top compartment lid locked (switch open)


Step 12
  • Switch positions indicate:

    Convertible-top compartment lid unlocked (switch closed)


Step 30
12 Check convertible top and latching hook input signals when convertible top is opened
  • Check switch positions for convertible top and latching hooks
  • Switch positions indicate:

    Convertible top raised (switch closed) and latching hooks not actuated (switch closed)


Step 13
  • Switch positions indicate:

    Convertible top not raised (switch open)


Step 33
  • Switch positions indicate:

    Latching hooks actuated (switch open)


Step 37
13 Preparatory work for step 14:
  • Ignition on
  • Connect Porsche System Tester II 9588 and call up the data logger in the Input signals menu

Select and call up the following 4 input signals:
  • Closure locked
  • Closure unlocked
  • Convertible top
  • Convertible-top compartment lid
 Step 14
14 Check switch characteristics for closure locked, closure unlocked, convertible top and convertible-top compartment lid while opening and closing
  • Close convertible top completely until it has reached its final position and open it again
  • observe the switching lines in the process
  • if necessary, repeat the process
 all switching lines have a continuous path (similar to that illustrated in the figure below)
Step 15		 one or more switching lines indicate unusual deflections (peaks or similar deviations):
  • in the input signals closure locked or closure unlocked or convertible top

Step 40
  • in the input signal convertible-top compartment lid

Step 41
NOTE:
  • Fig 1 illustrates the voltage characteristics upon opening the convertible top!
  • The voltage characteristics upon closing the convertible top result in a mirror image!
Fig 1: Identifying Voltage Characteristics Upon Closing/Opening Convertible Top Result In A Mirror Image (As Of Model Year 2003)
G03099025Courtesy of PORSCHE OF NORTH AMERICA, INC.
DIAGNOSIS/TROUBLESHOOTING FOR FAULT CODE 1 - STEPS 15 & 16

Work instruction Display OK If not OK
15 Preparatory work for step 16: delete existing input signals in data logger, then select and call up the following 4 input signals:
  • Side flap top right
  • Side flap bottom right
  • Side flap top left
  • Side flap bottom left
 Step 16
16 Check switch characteristics of both side flaps while opening and closing
  • Close the convertible top completely until it has reached its final position and open it again
  • observe the switching lines in the process
  • repeat the process if necessary
 all switching lines have a continuous path (similar to that illustrated in the figure below)
Step 49		 one or more switching lines indicate unusual deflections (peaks or similar deviations)
Step 41
NOTE:
  • Fig 2 illustrates the voltage characteristics upon opening the convertible top!
  • The voltage characteristics upon closing the convertible top result in a mirror image!
Fig 2: Identifying Voltage Characteristics Upon Opening/Closing The Convertible Top (As Of Model Year 2003)
G03099026Courtesy of PORSCHE OF NORTH AMERICA, INC.
DIAGNOSIS/TROUBLESHOOTING FOR FAULT CODE 1 - STEPS 17 TO 50

Work instruction Display OK If not OK
17 Check input signals from microswitch for motor closure locked and closure unlocked on the convertible top control unit
  • Ignition off
  • Pull off plug A on convertible top control unit
  • Measure the resistance between plug A pin 5 and ground
 < 5 Step 18
  • Measure the resistance between plug A pin 20 and ground
 Step 50
18 Check wires between microswitch for motor and convertible top control unit for short circuit to ground
  • Ignition off
  • Pull off microswitch connectors in convertible top lock
  • Measure the resistance between convertible top control unit plug A pin 5 and ground
  • Measure the resistance between convertible top control unit plug A pin 20 and ground
 Step 19 Repair wiring harness
->End
19 Check wires between microswitch for motor and convertible top control unit for short circuit
  • Ignition off
  • Measure the resistance between convertible top control unit plug A pin 5 and pin 20
  • Measure the resistance between convertible top control unit plug A pin 9 and pin 20
  • Measure the resistance between convertible top control unit plug A pin 5 and pin 9
 Step 42 Repair wiring harness
->End
20 Check input signals from microswitch flap side flap top right and side flap bottom right on the convertible top control unit
  • Move right side flap to an intermediate position in which it is neither up nor down
  • Ignition off
  • Pull off plug D on convertible top control unit
  • Measure the resistance between plug D pin 7 and ground
   Step 21
  • Measure the resistance between plug D pin 8 and ground
 Step 50 Step 23
21 Check wires between microswitch for flap side flap top right and convertible top control unit for short circuit to ground
  • Ignition off
  • Pull off microswitch connector for flap side flap top right
  • Measure the resistance between convertible top control unit plug D pin 7 and ground
 Step 22 Repair wiring harness
->End
22 Check wires between microswitches for flap side flap right and convertible top control unit for short circuit
  • Ignition off
  • Measure the resistance between convertible top control unit plug D pin 7 and pin 8
 Step 43 Repair wiring harness
->End
23 Check wires between microswitch for flap side flap bottom right and convertible top control unit for short circuit to ground
  • Ignition off
  • Pull off microswitch connector for flap side flap bottom right
  • Measure the resistance between convertible top control unit plug D pin 8 and ground
 Step 24 Repair wiring harness
->End
24 Check wires between microswitches for flap side flap right and convertible top control unit for short circuit
  • Ignition off
  • Measure the resistance between convertible top control unit plug D pin 7 and pin 8
 Step 44 Repair wiring harness
->End
25 Check input signals from microswitch flap side flap top left and side flap bottom left on the convertible top control unit
  • Move left side flap to an intermediate position in which it is neither up nor down
  • Ignition off
  • Pull off plug D on convertible top control unit
  • Measure the resistance between plug D pin 9 and ground
   Step 26
  • Measure the resistance between plug D pin 10 and ground
 Step 50 Step 28
26 Check wires between microswitch for flap side flap top left and convertible top control unit for short circuit to ground
  • Ignition off
  • Pull off microswitch connector for flap side flap top left
  • Measure the resistance between convertible top control unit plug D pin 9 and ground
 Step 27 Repair wiring harness
->End
27 Check wires between microswitches for flap side flap left and convertible top control unit for short circuit
  • Ignition off
  • Measure the resistance between convertible top control unit plug D pin 9 and pin 10
 Step 45 Repair wiring harness
->End
28 Check wires between microswitch for flap side flap top left and convertible top control unit for short circuit to ground
  • Ignition off
  • Pull off microswitch connector for flap side flap top left
  • Measure the resistance between convertible top control unit plug D pin 10 and ground
 Step 29 Repair wiring harness
->End
29 Check wires between microswitches for flap side flap left and convertible top control unit for short circuit
  • Ignition off
  • Measure the resistance between convertible top control unit plug D pin 9 and pin 10
 Step 46 Repair wiring harness
->End
30 Check input signal from microswitch convertible-top compartment lid on convertible top control unit
  • Ignition off
  • Pull off plug A on convertible top control unit
  • Measure the resistance between plug A pin 19 and ground
 Step 50 Step 31
31 Check wire beween microswitch convertible-top compartment lid locked and convertible top control unit for open circuit
  • Ignition off
  • Pull off microswitch connector convertible-top compartment lid locked
  • Measure resistance between convertible top control unit plug A pin 19 and microswitch connector convertible-top compartment lid locked
 < 5
Step 47		 Repair wiring harness
->End
32 Check input signal from microswitch convertible top on convertible top control unit
  • Ignition off
  • Pull off plug A on convertible top control unit
  • Measure the resistance between plug A pin 9 and ground
 Step 50 Step 34
33 Check input signal from microswitch convertible top on convertible top control unit
  • Ignition off
  • Pull off plug A on convertible top control unit
  • Measure the resistance between plug A pin 9 and ground
 < 5
Step 50		 Step 34
34 Check wire between microswitch convertible top and convertible top control unit for short circuit to ground
  • Ignition off
  • Pull off microswitch connector convertible top
  • Measure the resistance between convertible top control unit plug A pin 9 and ground
 Step 35 Repair wiring harness
->End
35 Check wire between microswitch convertible top and convertible top control unit for open circuit
  • Ignition off
  • Pull off microswitch connector convertible top
  • Measure resistance between convertible top control unit plug A pin 9 and microswitch connector convertible top
 < 5
Step 42		 Repair wiring harness
->End
36 Check input signal from microswitch latching hook on convertible top control unit
  • Ignition off
  • Pull off plug A on convertible top control unit
  • Measure the resistance between plug A pin 3 and ground
 Step 50 Step 38
36 Check input signal from microswitch latching hook on convertible top control unit
  • Ignition off
  • Pull off plug A on convertible top control unit
  • Measure the resistance between plug A pin 3 and ground
 < 5
Step 50		 Step 38
38 Check wire between microswitch latching hook and convertible top control unit for short circuit to ground
  • Ignition off
  • Pull off microswitch connector latching hook
  • Measure the resistance between convertible top control unit plug A pin 3 and ground
 Step 39 Repair wiring harness
->End
39 Check wire between microswitch latching hook and convertible top control unit for open circuit
  • Ignition off
  • Pull off microswitch connector latching hook
  • Measure resistance between convertible top control unit plug A pin 3 and microswitch connector convertible top
 < 5
Step 48		 Repair wiring harness
->End
40
  • Repair convertible top wiring harness
 ->End
41
  • Repair rear wiring harness
 ->End
42
  • Replace microswitch for motor in convertible top lock
 ->End
43
  • Replace flap microswitch for side flap top right
 ->End
44
  • Replace flap microswitch for side flap bottom right
 ->End
45
  • Replace flap microswitch for side flap top left
 ->End
46
  • Replace flap microswitch for side flap bottom left
 ->End
47
  • Replace microswitch convertible-top compartment lid locked
 ->End
48
  • Replace microswitch latching hook
 ->End
49
  • Recalibrate convertible top
  • Erase fault memory
  • Completely open and close convertible top 3 times
  • Read out fault memory again
 Fault code 1 is not entered
->End		 Fault code 1 has been entered again
Step 50
50
  • Replace convertible top control unit
 ->End
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