Before you perform the PSD re-initialization, check for Diagnostic Trouble Codes (DTCs) by performing Diagnostic Mode 1.
Refer to Diagnostic Modes for the procedure.
Perform the following PSD re-initialization procedure when any of the following conditions occur:
Perform this procedure in order to re-initialize the PSD:
Hello again. Your van's door should have a self diagnostics feature built into it that will make beeps that you need to count. I would like you to read the following information and give it a try and we will see if it does us any good or not. If we can't get an idea of the problem after running the diagnostic codes or if it will not do the self diagnostics, I am afraid you will be stuck with trying to find someone who has the same class 2 scan tool that the dealers use to go any farther with it. So let me know. We are going to try to keep you from going to a dealer with it if we can. If it gives us codes, be sure to write them down so I can look them up. Thanks
The PSD contains sophisticated on-board diagnostics designed to identify the source of any PSD malfunctions, including whether or not the malfunction is intermittent. The PSD installed on domestic vehicles have seven Diagnostic Trouble Codes (DTCs) and 3 diagnostic modes.
Reading Diagnostic Trouble Codes (DTCs)
` Diagnostic Modes for more information on how to read PSD DTCs.
Clearing Diagnostic Trouble Codes (DTCs)
Diagnostic Trouble Codes (DTCs) in the rear side door actuator control module clear when the following actions occur:
The PSD has 3 diagnostic modes:
Entering PSD diagnostics is done by gaining entry into Diagnostic Mode 1. Refer to How to Enter Diagnostic Mode 1.
Diagnostic Mode 2 may only be entered from Diagnostic Mode 1 after it has been performed. Refer to How to Enter Diagnostic Mode 2 from Diagnostic Mode 1.
Diagnostic Mode 3 may only be entered from Diagnostic Mode 2 after it has been performed. Refer to How to Enter Diagnostic Mode 3 from Diagnostic Mode 2.
The diagnostic modes can only be entered in order.
How to Enter Diagnostic Mode 1
Diagnostic Mode 1 sounds the DTCs through the power sliding door alarm. Enter Diagnostic Mode 1 by performing the following procedure:
Upon entering Diagnostic Mode 1, the following actions occur:
If you want to exit diagnostics after Diagnostic Mode 1 has been completed, refer to How to Exit Diagnostics in this section. If you want to perform Diagnostic Mode 2, do not exit Diagnostic Mode 1. Refer to How to Enter Diagnostic Mode 2 for procedure.
Bummer, looks like we are up the creek without a paddle. If it is a code 12, that indicates that there is no problem or no code stored in the self diagnostics. What that means to you and me is that there is no practical way for us to test the thing. It is going to need a class 2 scan tool connected to it to go any farther. I will post the code chart from the book below so you can see what I am talking about. About all you can do from this point your self, would be to maybe pull the trim pad on the door and look for any obvious problems like broken connections or wires, etc. The system works through the park switch for the transmission, the power door lock circuit, the remote door lock circuit and on and on. So, without the special test equipment like the dealer has, you could chase things for a long time and replace a lot of parts that would cost money and maybe fix it and maybe not. I am afraid this is one of those times when it will be cheaper to have it checked out professionally than to try to repair it at home. Trust me this is not what I was wanting to tell you. But if it is giving you a no problem found code, there isn't much more you can do. Sorry. Let me know what you decide or if there is anything else I can help you with. Thanks
DTC
Description
12
No Diagnostic Trouble Codes Found
System OK
13
Door Position Fault
14
Controller Malfunction
22
Door Motion Error Sensed On Actuation
23
No Latch Input
24
Controller Error (GEN 1 Models Only)
Vehicle Speed Signal Circuit Open (GEN 2 Models Only)
32
Vehicle Speed Signal Circuit Shorted to Ground
Important: If any DTCs are stored in memory (except DTC 12), refer to the appropriate DTC table for diagnosis.
Auto Service Technician
40 year GM Tech. +30 Certified. ASE Master Tech.(expired, retired) Medium Duty, Heavy Line, Retired