Use Diagnostic Trouble Codes (DTCs) (from the DTC checks) in the table below to determine the trouble area and proper inspection procedure. The Supplemental Restraint System (SRS) diagnostic trouble code chart is shown below as an example.

Symptom simulation
Problem symptoms tableGcwr, twr and unbraked twr
Confirm that the gross trailer weight, gross combination weight, gross
vehicle weight, gross axle weight and tongue weight are all within the
limits.
Gcwr*1 and twr*1
*1: These models meet the tow-vehicle trailering requirement of sae
international
per sae j2807.
*2: The model code is in ...