Fault Code 1

Fault Code 1

Switch position implausible

Diagnostic conditions
- Open convertible top completely and close it again

Possible cause of fault
- Short circuit to ground or in the wiring between the microswitches and the control module for the convertible top
- Both microswitches for locking and unlocking motor (closure) are actuated
- Both upper and lower microswitches for right flap (side flap) are actuated
- Both upper and lower microswitches for left flap (side flap) are actuated
- Microswitch (convertible-top compartment lid) faulty
- Convertible top control module defective

Affected pins
Plug A, pin 3, pin 5, pin 9 pin 19 and pin 20
Plug D, pin 7, pin 8 pin 9 and pin 10

Diagnosis/troubleshooting

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 module in the vehicle in such a way that when the convertible top mechanism is opened or closed, nothing is brushed against or trapped and the mechanism can move freely.

NOTE:
- Before starting the troubleshooting from step 17 to step 39, connect special tool 45-pin test adapter 9636 to the convertible- top control module 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 module 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 module 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 attached at the position of the convertible-top control module while the convertible-top control module is connected 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.

NOTE:
- The illustration displayed below illustrates the voltage characteristics upon opening the convertible top.
- The voltage characteristics upon closing the convertible top result in a mirror image.