Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Power Side-Step Module (PSSM)
DESCRIPTION
| 1 - PSSM |
The Power Side-Step Module (PSSM) controls deployment and retraction of the Power Side-Steps. The Left Hand (LH) and Right Hand (RH) Power Side-Steps are controlled independently. The functional "mode" of the Power Side-Steps is set via Controller Area Network-Interior High Speed (CAN-IHS) interface with the Radio touch screen. The PSSM is located within the instrument panel assembly on the inner silencer dash panel.
OPERATION
The PSSM monitors the status of door ajar signal, gear position, and vehicle speed via CAN. In addition, the module powers the drive motors of the Power Side-Steps, and interprets their hall-signal and current-draw to invoke reversal or stop (Detects obstacle obstruction or component malfunction). Finally, the PSSM communicates the status of the Power Side-Steps to the Body Control Module (BCM) via CAN to invoke audio and visual messages to the owner as well as setting and storing Diagnostic Trouble Codes (DTC). The BCM forwards the audio and video messages to the Instrument Panel Cluster (IPC). The PSSM receives battery voltage through the Power Distribution Center (PDC).
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.