Rectifier Assembly

WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.

Check the condition of the (+) heat sink by checking the continuity between the (+) heat sink and each of the stator coil lead connecting terminals.
If the continuity is present for both terminals, or if no continuity is present for both terminals, the diode is shorted. Replace the rectifier assembly.

Fig 1: Checking Continuity Between Heat Sink And Stator Coil Lead Terminals
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Check the condition of the (-) heat sink by checking the continuity between the (-) heat sink and each of the stator coil lead connecting terminals.
If the continuity is present for both terminals, or if no continuity is present for both terminals, the diode is shorted. Replace the rectifier assembly.

Fig 2: Checking Continuity Between Heat Sink And Stator Coil Lead Terminals
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.