RAM 1500 Truck 4WD V8-5.7L VIN D (2005)
Disconnect the Cylinder Lock Switch connector.
Using a 12-volt test light connected to 12-volts, check the Ground circuit.
Q: Does the test light illuminate brightly?
YES: Replace the Cylinder Lock Switch. Perform VTSS VERIFICATION TEST - 1A. See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Diagnostic Trouble Code Tests and Associated Procedures/Verification Tests/Vehicle Theft Security Verification
Tests/VTSS Verification Test
NO: Repair the Ground circuit for an open. Perform VTSS VERIFICATION TEST - 1A. See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Diagnostic Trouble Code Tests and Associated Procedures/Verification Tests/Vehicle Theft Security Verification
Tests/VTSS Verification Test
8. CYLINDER LOCK SWITCH MUX OPEN
Disconnect the Cylinder Lock Switch connector.
Disconnect the Instrument Cluster C2 connector.
Measure the resistance of the Cylinder Lock Switch Mux circuit between the Switch connector and the Instrument Cluster connector.
Q: Is the resistance below 5.0 ohms?
YES: Replace the Instrument Cluster. Perform VTSS VERIFICATION TEST - 1A. See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Diagnostic Trouble Code Tests and Associated Procedures/Verification Tests/Vehicle Theft Security Verification
Tests/VTSS Verification Test
NO: Repair the Cylinder Lock Switch Mux circuit for an open. Perform VTSS VERIFICATION TEST - 1A. See: Powertrain
Management/Computers and Control Systems/Testing and Inspection/Diagnostic Trouble Code Tests and Associated Procedures/Verification
Tests/Vehicle Theft Security Verification Tests/VTSS Verification Test
