Fault Code 1734
Fault code 1734Potentiometer for driver's horizontal mirror adjustment
NOTE: This fault was detected by the 'driver's door' control module.
Diagnostic conditions
- Ignition on
- Battery voltage OK (11.4 to 14.5 V)
- Internal function test on driver's door control module
- Use the mirror adjustment switch to change the horizontal position of the driver's mirror and then return the mirror to its original position using a memory key on the seat.
Possible causes of fault
- Potentiometer for driver's horizontal mirror adjustment faulty
- Horizontal adjustment motor for driver's door mirror does not function
- Wiring faulty
Affected pins
Driver's door control module, plug B:
- Pin 5 'Status, position X'
Pin assignment on mirror adjustment motor
Diagnosis/troubleshooting
NOTE:
Visual inspection: In the next troubleshooting section, please check first that the affected pins on the driver's door control module plug connection are neither damaged nor corroded. The wiring and plugs of the affected components must also be checked for external damage and correct contacts. Repair damaged or corroded pins if possible, otherwise replace affected pins. Repair or replace damaged wires.
NOTE:
Sporadic faults: In the event of faults that occur sporadically, the wiring positions that are linked to moving parts on and in the vehicle must be checked for each system. Various statuses that can cause faults must be simulated with the help of the wiring diagram.
NOTE:
Battery voltage: A battery voltage of between 11.4 and 14.5 V is required for the following troubleshooting procedure. This must be checked and provided, if necessary. On the vehicle electrical system, the voltage to the fuse (input side) must be guaranteed.
NOTE: 'Implausible signal' --> The fault is detected if the resistance between plug B, pins 4 and 13 remains unchanged for more than 1.5 seconds during memory activation.
