PSL/PSR-421 Control Module

TA. Diagnostic trouble code (DTC) information

Condition
- The control module has a main relay which regulates supply voltage to the motors via four separate motor relays. If the main relay is not activated when a button is pressed in or if the relay is activated with all buttons are in the up position diagnostic trouble code (DTC) PSL/PSR-421 is set.

Possible source
- Defective control module.

Fault symptom(s)
- One or more functions not working.
- Memory buttons do not function
- This diagnostic trouble code (DTC) may occur without any fault symptom being apparent.