Initial Inspection and Diagnostic Overview

1. Verify the customer concern by operating the system.

Visual Inspection Chart:

2. Visually inspect for obvious signs of mechanical and electrical damage.
3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
4. If the concern remains after the inspection, connect the diagnostic tool to the Data Link Connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the diagnostic tool menu. If diagnostic tool does not communicate with the vehicle:
^ check that the program card is correctly installed.
^ check the connections to the vehicle.
^ check the ignition switch position.
5. If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool manual.
6. Carry out the DATA LINK DIAGNOSTICS test. If the diagnostic tool responds with:
^ CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, refer to Module Communications Network (Information Bus).
^ NO RESP/NOT EQUIP for central security module, refer to Module Communications Network (Information Bus).
^ NO RESP/NOT EQUIP for tonneau cover module, GO to Pinpoint Test A. Test A: No Communication With The Tonneau Cover Module
^ SYSTEM PASSED, retrieve and record the continuous Diagnostic Trouble Codes (DTCs), erase the continuous DTCs, and carry out self-test diagnostics for the central security module.
7. If the DTCs retrieved are related to the concern, go to the Central Security Module Diagnostic Trouble Code (DTC) Index or the tonneau cover module Diagnostic Trouble Code (DTC) Index to continue diagnostics. CSM Diagnostic Trouble Code (DTC) Index Tonneau Cover Module Diagnostic Trouble Code (DTC) Index
8. If DTCs are retrieved that are not found in the following Central Security Module Diagnostic Trouble Code (DTC) Index, refer to the master Central Security Module Diagnostic Trouble Code (DTC) Index in Module Communications Network (Information Bus). CSM Diagnostic Trouble Code (DTC) Index Tonneau Cover Module Diagnostic Trouble Code (DTC) Index
9. If no DTCs related to the concern are retrieved, proceed to the Symptom Chart to continue diagnostics. Symptom Related Diagnostic Procedures