Symptom Chart

SMART JUNCTION BOX (SJB) DTC CHART

DTC	Description	Action
B2212	Panel Dim Switch Out of Range	Go To PINPOINT TEST C .
B2A32	LED Backlighting Output Circuit Open	If the backlighting components are inoperative, Go To PINPOINT TEST A . If the backlighting components are always on, Go To PINPOINT TEST B .
B2A33	LED Backlighting Output Circuit Short to Ground	Go To PINPOINT TEST A .
All other DTCs	-	REFER to the Diagnostic Trouble Code (DTC) Chart in MULTIFUNCTION ELECTRONIC MODULES .

DTC CHARTS

Condition	Possible Sources	Action
No communication with the Smart Junction Box (SJB)	Fuse Wiring, terminals or connectors SJB	REFER to MODULE COMMUNICATIONS NETWORK .
The control illumination is inoperative - all hardwired illumination	Fuse Wiring, terminals or connectors SJB	Go To PINPOINT TEST A .
The control illumination is always on - all hardwired illumination	Wiring, terminals or connectors SJB	Go To PINPOINT TEST B .
All control illumination does not dim	Wiring, terminals or connectors Instrument panel dimmer switch SJB	Go To PINPOINT TEST C .
The steering wheel control illumination is inoperative	Wiring, terminals or connectors Steering wheel control switches Steering wheel harness Clock spring	Go To PINPOINT TEST D .
The door lock control switch or the roof opening panel switch illumination is inoperative	Wiring, terminals or connectors Door lock switch Roof opening panel switch	Go To PINPOINT TEST E .
The individual hardwired component illumination is inoperative	Wiring, terminals or connectors Ambient lighting switch (if equipped) Clock (if equipped) Center stack switch assembly Floor shifter Headlamp switch Message center switch Power liftgate switch (if equipped) Liftgate release switch Auxiliary climate control assembly (if equipped)	Go To PINPOINT TEST F .
The driver window control switch illumination is inoperative	Wiring, terminals or connectors Window control switch	Go To PINPOINT TEST G .
The passenger window control switch illumination is inoperative	Window control switch	CHECK the operation of the power windows. If the power windows are inoperative, REFER to GLASS, FRAMES AND MECHANISMS . If the power windows operate correctly, INSTALL a new window control switch. REFER to GLASS, FRAMES AND MECHANISMS . TEST the system for normal operation.
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 to any module on the MS-CAN , REFER to MODULE COMMUNICATIONS NETWORK . If the scan tool communicates with the modules on the MS-CAN , INSTALL a new SJB . REFER to MULTIFUNCTION ELECTRONIC MODULES . TEST the system for normal operation.
The Instrument Cluster (IC) illumination is inoperative/does not dim	IC	CARRY OUT the network test. If the scan tool responds with no communication with the IC , REFER to MODULE COMMUNICATIONS NETWORK . If the scan tool communicates with the IC , INSTALL a new IC . REFER to INSTRUMENTATION, MESSAGE CENTER, AND WARNING CHIMES . TEST the system for normal operation.
The HVAC module illumination is inoperative/does not dim (vehicles with navigation)	HVAC module	CARRY OUT the network test. If the scan tool responds with no communication with the HVAC module, REFER to MODULE COMMUNICATIONS NETWORK . If the scan tool communicates with the HVAC module, INSTALL a new HVAC module. REFER to CLIMATE CONTROL . TEST the system for normal operation.
The Front Controls Interface Module (FCIM) illumination is inoperative/does not dim (vehicles without navigation)	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 Front Display Interface Module (FDIM) illumination is inoperative/does not dim (vehicles without navigation)	FDIM	CARRY OUT the network test. If the scan tool responds with no communication with the FDIM , REFER to MODULE COMMUNICATIONS NETWORK . If the scan tool communicates with the FDIM , INSTALL a new FDIM . REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . TEST the system for normal operation.
The Audio Control Module (ACM) illumination is inoperative/does not dim (vehicles with navigation)	ACM	CARRY OUT the network test. If the scan tool responds with no communication with the ACM , REFER to MODULE COMMUNICATIONS NETWORK . If the scan tool communicates with the ACM , INSTALL a new ACM . 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.