Step 
 | Action 
 | Value(s) 
 | Yes 
 | No 
 | 
1 
 | 
- Turn the ignition OFF.
 
- Roll down the windows.
 
- Close all of the doors.
 
- Connect a scan tool.
 
- Turn the ignition to the ON position. 
 
-  Using the scan tool, inspect for any DTCs in the body control
module (BCM).
 
 
Does the scan tool show any DTCs? 
 | -- 
 | Go to 
Diagnostic System Check - Body Control System 
in Body Controls 
 | 
Go to Step 2
        
 | 
2 
 | 
- Depress the door lock switch to the lock position.
 
- Using the scan tool, command the door unlock relay ON.
 
 
Do the doors unlock? 
 | -- 
 | Go to 
Power Door Locks Switch Inoperative - One  
 | 
Go to Step 3
        
 | 
3 
 | 
- Using the scan tool, read the pass door unlock input.
 
- While reading the scan tool, depress the door lock switch to the
unlock position.
 
 
Does the scan tool show active? 
 | -- 
 | 
Go to Step 4
        
 | Go to 
Power Door Locks Switch Inoperative - One  
 | 
4 
 | Replace the door unlock relay. 
Is the repair complete? 
 | -- 
 | System OK 
 | -- 
 |