Symptom Chart

NOTE: Refer to Description and Operation, Intelligent Access (IA) with Push Button Start in ANTI-THEFT - PASSIVE ANTI-THEFT SYSTEM (PATS) to review the procedures for achieving the various ignition states (ignition off, ignition in accessory, ignition on, ignition start).

SYMPTOM CHART

Condition	Possible Sources	Action
All dimmable illumination does not dim	Wiring, terminals or connectors Instrument panel dimmer switch Smart Junction Box (SJB)	GO to PINPOINT TEST A .
All dimmable switch illumination is inoperative	Fuse Wiring, terminals or connectors SJB	GO to PINPOINT TEST B .
All dimmable switch illumination is always on	Wiring, terminals or connectors SJB	GO to PINPOINT TEST C .
The steering wheel switch illumination is inoperative	Wiring, terminals or connectors Steering wheel switches Steering wheel harness Clockspring	GO to PINPOINT TEST D .
One or more switch illumination is inoperative	Wiring, terminals or connectors Illuminated switch	GO to PINPOINT TEST E .
All network controlled illumination does not dim	Medium Speed Controller Area Network (MS-CAN) SJB	CARRY OUT the network test. If the scan tool responds with no communication with the SJB, REFER to MODULE COMMUNICATIONS NETWORK . If the scan tool communicates with the SJB, INSTALL a new SJB. REFER to MULTIFUNCTION ELECTRONIC MODULES . TEST the system for normal operation.
The Instrument Panel Cluster (IPC) illumination is inoperative	IPC	CARRY OUT the network test. If the scan tool responds with no communication with the IPC, REFER to MODULE COMMUNICATIONS NETWORK . If the scan tool communicates with the IPC, INSTALL a new IPC. REFER to INSTRUMENTATION, MESSAGE CENTER, AND WARNING CHIMES . TEST the system for normal operation.
The Front Controls Interface Module (FCIM) illumination is inoperative	FCIM	CARRY OUT the network test. If the scan tool responds with no communication with the FCIM, REFER to MODULE COMMUNICATIONS NETWORK . If the scan tool communicates with the FCIM, INSTALL a new FCIM. REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . TEST the system for normal operation.
The Rear Entertainment Module (RETM) illumination is inoperative/does not dim	RETM	CARRY OUT the network test. If the scan tool responds with no communication with the RETM, REFER to MODULE COMMUNICATIONS NETWORK . If the scan tool communicates with the RETM, INSTALL a new RETM. REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . TEST the system for normal operation.