3.2CL V6-3.2L SOHC (2003)
20. Check for voltage between the B20 and B19 terminals while moving the mirror from up to down.
Does the voltage change from about 0.5 V to 4.5 V?
YES - Substitute a known good passenger's multiplex control unit, and recheck. If the systems now work OK, replace the original passenger's unit.
NO - Repair open or short in the GRY wire. If the wire is OK, faulty left power mirror position sensor, replace the left power mirror actuator.
