Principles of Operation
Note. The time out for the battery saver relay and the accessory delay relay (both are controlled by the SJB) is 1 minute if the vehicle has less than 80 km (50 miles). Once the vehicle passes the approximate mileage threshold of 80 km (50 miles), the time out for both relays will be the normal 10 minute time out, as described by the Owner's Literature. For the battery saver relay, refer to INTERIOR LIGHTING article. For the accessory delay relay, refer to GLASS, FRAMES AND MECHANISMS article.
Note. The smart junction box (SJB) is also known as the generic electronic module (GEM).
The SJB is a multifunction module that controls many of the vehicle systems. Most of the SJB functions utilize hardwired inputs and/or outputs. The SJB controls the following hardwired functions, using the corresponding inputs and outputs
| Function | Input(s) | Output(s) |
|---|---|---|
| Accessory delay | Master power window switch Power sliding roof switch Audio control module (ACM) | Accessory delay relay |
| Autolamps (if equipped) | Headlamp switch Ambient light sensor | Exterior lamps |
| Battery saver | Internal to SJB | Battery saver relay |
| Daytime running lamps (if equipped) | Ignition switch status Parking brake status | Low beam headlamps |
| Luggage compartment lid release | Luggage compartment lid release switch | Luggage compartment lid release relay |
| Fog lamps (if equipped) | Headlamp switch | Fog lamp relay |
| Headlamps (low beam) | Headlamp switch | Low beam headlamps |
| Headlamps (high beam and flash-to-pass) | Headlamp switch Multifunction switch | High beam relay |
| Heated rear window | Heated rear window switch | Heated rear window relay |
| Horn | Horn switch | Horn relay |
| Parking lamps | Headlamp switch | Parking lamps relay |
| Power door locks | Driver door lock control switch Passenger door lock control switch | Door lock/unlock relays |
| Remote keyless entry (RKE) system | Keyless entry keypad RKE transmitter (part of the integrated keyhead transmitter [IKT] key) | Power door locks Parking lamps Horn |
| Stoplamps | Stoplamp switch | Stoplamps |
| Turn signal/hazard lamps | Multifunction switch Hazard lamps switch | Turn signal/hazard lamps |
In addition, the SJB is involved in other vehicle systems through communication over the medium speed controller area network (MS-CAN). For a detailed list of SJB network inputs and outputs, refer to MODULE COMMUNICATIONS NETWORK article, Principles of Operation .
Some SJB parameters are programmable. Two types of programmable parameters are available: vehicle configuration and customer preference. Refer to MODULE CONFIGURATION article.
Normal Operation
When a repetitive fault causing a circuit overload is detected on certain output circuits, the SJB disables the circuit by removing voltage, or ground, to the affected circuit. The circuit remains disabled until the fault is corrected and the DTCs are cleared, and then the self-test is repeated. When the on-demand self-test has been run after all faults have been corrected, any DTCs related to the fault are cleared.
- DTC B106E sets when the SJB has disabled a circuit due to a repetitive fault causing a circuit overload. For a complete list of corresponding DTCs, refer to «Principles of Operation»(ref-293473-S29372129312008080700000) .
- DTC B106F (Module Disabled Due to External Fault) - sets when one or more output functions are permanently disabled due to a repetitive circuit overload fault. DTC B106F will be set with DTC B106E. When DTC B106F is present, the SJB must be replaced after the fault condition has been corrected.
This pinpoint test is intended to diagnose the following
- Output circuit short to ground or voltage
- SJB
Note. The smart junction box (SJB) is also known as the generic electronic module (GEM).
The driver seat module (DSM) allows the driver to program a personalized seat position that can be recalled using the memory switch or a remote keyless entry (RKE) transmitter (part of the integrated keyhead transmitter [IKT] key). In addition to the position of the driver seat, the DSM also controls the position of the exterior mirrors and the adjustable pedals. Refer to SEATING article.
The DSM is part of the medium speed controller area network (MS-CAN), over which it receives the selected transmission gear message. All other functions of the DSM are hardwired.
When a repetitive fault causing a circuit overload is detected on certain output circuits, the driver seat module (DSM) disables the circuit by removing voltage, or ground, to the affected circuit. The circuit remains disabled until the fault is corrected and an on-demand self-test is run. When the on-demand self-test has been run after all faults have been corrected, any DTCs related to the fault are cleared.
- DTC B106E sets when the DSM has disabled a circuit due to a repetitive fault causing a circuit overload. For a complete list of corresponding DTCs, refer to «Principles of Operation»(ref-293473-S29372129312008080700000) .
- DTC B106F (Module Disabled Due to External Fault) - sets when one or more output functions are permanently disabled due to a repetitive circuit overload fault. DTC B106F will be set with DTC B106E. When DTC B106F is present, the DSM must be replaced after the fault condition has been corrected.
This pinpoint test is intended to diagnose the following
- Output circuit short to ground or voltage
- DSM