Normal Operation
The SJB receives power from the BJB through circuits 1682 (R/LB), 1695 (Y/W) and 54 (LG/Y). The SJB sends a reference signal to the multifunction switch through circuit (R/Y). When the multifunction switch is switched to the headlamps ON position, the voltage signal is routed to ground through circuit (B/W). When the SJB detects the multifunction switch is in the headlamps ON position, the SJB sends voltage to the headlamps.
The SJB receives power from circuit (B/LG). The SJB sends a reference signal to the multifunction switch through circuit (R/Y). When the multifunction switch is switched to the headlamps ON position, the voltage signal is routed to ground through circuit (B/W). When the SJB detects the multifunction switch in the headlamps ON position, the SJB sends voltage to the headlamps. When the SJB detects the multifunction switch in the headlamps ON and low beam positions, the SJB sends voltage through circuits (DG/O) (RH headlamp) and (DL/W) (LH headlamp) to the low beam headlamps. Circuit (B) is the ground circuit for the headlamps.
The SJB receives power from circuit (LG/Y). The SJB sends a reference signal to the multifunction switch through circuit (LG/B). When the multifunction switch is switched to the high beam position, the voltage signal is routed to ground through circuit (B/W). When the SJB detects the multifunction switch in the headlamps ON and in the high beam position, the SJB sends voltage to the high beam headlamps.
When the SJB detects the multifunction switch in the headlamps ON and in the low beam position, the SJB sends voltage through circuits (DG/O) (RH headlamp) and (DL/W) (LH headlamp) to the low beam headlamps. Circuit (B) is the ground circuit for the headlamps.
When the SJB detects the multifunction switch in the headlamps ON and in the high beam position, the SJB sends voltage through circuits (DL/LG) (RH headlamp) and (W/LG) (LH headlamp) to the high beam headlamps. Circuit (B) is the ground circuit for the headlamps.
The SJB sends a reference signal to the multifunction switch through circuits (R/Y) (low beam request), (LG/B) (high beam request) and (DL/O) (flash-to-pass request). When the SJB detects a request for the low beams, the SJB sends voltage through circuits (DG/O) (RH headlamp) and (DL/W) (LH headlamp) to the low beam headlamps. When the headlamps are on and the SJB detects a request for the high beams, the SJB sends voltage through circuits (DL/LG) (RH headlamp) and (W/LG) (LH headlamp) to the high beam headlamps.
When the SJB detects a request for the flash-to-pass, the SJB sends voltage through circuits (DL/LG) (RH headlamp) and (W/LG) (LH headlamp) to the high beam headlamps.
The SJB sends a reference signal to the multifunction switch through circuit (DUO). When the multifunction switch is placed in the flash-to-pass position, the signal is routed to circuit (B/W). When the SJB detects a request for the flash-to-pass, the SJB sends voltage through circuits (DL/LG) (RH headlamp) and (W/LG) (LH headlamp) to the high beam headlamps.
The stoplamp switch is supplied battery voltage through circuit (LG/R) from the SJB. When the brake pedal is applied, the stoplamp switch allows voltage to flow through circuit (LG). Circuit (LG) sends voltage to the high mounted stoplamp and SJB, which in turn provides power to the LH and RH rear lamps.
When the brake pedal is applied, the stoplamp switch allows voltage to flow through circuit (LG). Circuit (LG) provides voltage to the high mounted stoplamp and the SJB. The SJB then provides power to the LH and RH rear lamps through circuits (LB/B) and (R/LG), respectively. All the stoplamp are provided ground through circuit (B).
When the brake pedal is applied, the stoplamp switch allows voltage to flow through circuit (LG). Circuit (LG) provides voltage to the high mounted stoplamp and the SJB. The SJB then provides power to the LH and RH rear lamps through circuits (LB/B) and (R/LG), respectively.
The SJB sends reference signals to the multifunction switch through circuits (LB/R) (LH turn input) and (LG/O) (RH turn input). When the multifunction switch is switched to the LH or RH turn positions, the voltage signal is routed to ground through circuit (B/W). When the SJB detects the multifunction switch is in the LH or RH turn position, the SJB sends voltage to the appropriate turn lamps.
All the turn lamps are individually wired to the SJB. The timed on/off cycle is determined in the SJB and is set to flash approximately 80 times per minute if both the front and rear turn lamps operate correctly. If only one turn signal lamp operates, the SJB will flash approximately 160 times per minute.
The SJB sends reference signals to the multifunction switch through circuits (LB/R) (LH turn input) and (LG/O) (RH turn input). When the multifunction switch is switched to the LH or RH turn positions, the voltage signal is routed to ground through circuit (B/W). When the SJB detects the multifunction switch is in the LH turn position, the SJB sends voltage through circuit 3 (LG/W) to the LH turn lamps. When the SJB detects the multifunction switch is in the RH turn position, the SJB sends voltage through circuit 2 (W/LB) to the RH turn lamps. Circuit (B) provides ground for each turn lamp.
All the turn lamps are individually wired to the SJB. The timed on/off cycle is determined in the SJB and is set to flash approximately 80 times per minute if both the front and rear turn lamps operate correctly. If only one turn signal lamp operates, the SJB will flash approximately 160 times per minute.
The SJB sends a reference signal to the hazard switch through circuit (R/W). When the hazard switch is pressed, the voltage signal is routed to ground through circuit (B/W). When the SJB detects a hazard lamps request, the SJB sends voltage to all the turn lamps.
The timed on/off cycle is determined in the SJB and is set to flash approximately 80 times per minute if all hazard lamps operate correctly.
The SJB sends a reference signal to the hazard switch through circuit (R/W). When the hazard switch is pressed, the voltage signal is routed to ground through circuit (B/W). When the SJB detects a hazard lamps request, the SJB sends voltage to all the turn lamps. The timed on/off cycle is determined in the SJB and is set to flash approximately 80 times per minute if all hazard lamps operate correctly.
The SJB sends reference signals to the multifunction switch through circuits (LB/R) (LH turn input) and (LG/O) (RH turn input). When the multifunction switch is switched to the LH or RH turn positions, the voltage signal is routed to ground through circuit (B/W). When SJB detects the multifunction switch is in the LH turn position, the SJB sends voltage through circuit (LG/W) to the LH turn lamps. When the SJB detects the multifunction switch is in the RH turn position, the SJB sends voltage through circuit (W/LB) to the RH turn lamps. Circuit (B) provides ground for each turn lamp.
All the turn lamps are individually wired to the SJB. The timed on/off cycle is determined in the SJB and is set to flash approximately 80 times per minute if both the front and rear turn lamps operate correctly. If only one turn signal lamp operates, the SJB will flash approximately 160 times per minute.
The SJB sends reference signals to the multifunction switch through circuits (LB/R) (LH turn input) and (LG/O) (RH turn input). When the multifunction switch is switched to the LH or RH turn positions, the voltage signal is routed to ground through circuit (B/W). When SJB detects the multifunction switch is in the LH turn position, the SJB sends voltage through circuit (LG/W) to the LH turn lamps. When the SJB detects the multifunction switch is in the RH turn position, the SJB sends voltage through circuit (W/LB) to the RH turn lamps. Circuit (B) provides ground for each turn lamp.
All the turn lamps are individually wired to the SJB. The timed on/off cycle is determined in the SJB and is set to flash approximately 80 times per minute if both the front and rear turn lamps operate correctly. If only one turn signal lamp operates, the SJB will flash approximately 160 times per minute.
The SJB sends a reference signal to the multifunction switch through circuit (W/B). When the SJB detects the multifunction switch in the parking lamps ON position, the SJB provides a ground for the parking lamp relay coil. Power to the parking lamp relay is provided internally by the SJB. When the parking lamp relay is energized, voltage is sent to the parking and license lamps.
The SJB sends a reference signal to the multifunction switch through circuit (W/B). When the multifunction switch is switched to the parking lamps ON position, the voltage signal is routed to ground through circuit (B/W). When the SJB detects the multifunction switch in the parking lamps ON position, the SJB provides a ground for the parking lamp relay coil. When the parking lamp relay is energized, voltage is sent through circuit (BR) to the parking and license lamps. Ground is provided to the parking and license lamps through circuit (B).
The SJB sends a reference signal to the multifunction switch through circuit (W/B). When the multifunction switch is switched to the parking lamps ON position, the voltage signal is routed to ground through circuit (B/W). When the SJB detects the multifunction switch in the parking lamps ON position, the SJB provides a ground for the parking lamp relay coil. Power to the parking lamp relay is provided internally by the SJB. When the parking lamp relay is energized, voltage is sent through circuit (BR) to the parking and license lamps.
The SJB sends a reference signal to the fog lamp switch through circuit (DL/W). When the fog lamp switch is engaged, the voltage signal is routed to ground through circuit (B/W).
When the SJB detects the fog lamp switch has been pressed, the SJB provides a ground for the fog lamp relay coil through circuit (LB/B). When the fog lamp relay is energized, voltage is sent through circuit (T/O) to the fog lamps. Power to the fog lamp relay is provided through circuit (Y/B).
The SJB sends a reference signal to the fog lamp switch through circuit (DL/W). When the fog lamp switch is engaged, the voltage signal is routed to ground through circuit (B/W).
When the SJB detects the fog lamp switch has been pressed, the SJB provides a ground for the fog lamp relay coil through circuit (LB/B). When the fog lamp relay is energized, voltage is sent through circuit (T/O) to the fog lamps.
Normal Operation - Automatic Transmission
When the transaxle is placed in REVERSE, the PCM sends a message over the high speed CAN to the instrument cluster indicating the transaxle is in reverse gear. The instrument cluster then sends a message over the medium speed CAN to the SJB indicating the transaxle is in reverse gear. The SJB then provides ground to an internal solenoid which routes power to circuit (B/P) to the backup lamps. Ground is provided to the backup lamps through circuit (B).
Normal Operation - Manual transaxle
The SJB sends a reference signal to the reversing lamp switch through circuit (V/W). When the transaxle is placed into reverse gear, the reversing lamp switch routes the voltage signal to ground through circuit (B).
When the transaxle is placed in REVERSE, the SJB provides ground to an internal relay which routes power to circuit (B/P) to the backup lamps. Ground is provided to the backup lamps through circuit (B).
When the transaxle is placed in REVERSE, the PCM sends a message over the high speed CAN to the instrument cluster indicating the transaxle is in reverse gear. The instrument cluster then sends a message over the medium speed CAN to the SJB indicating the transaxle is in reverse gear. The SJB then provides ground to an internal solenoid which routes power to circuit (B/P) to the backup lamps. Ground is provided to the backup lamps through circuit (B).
The SJB sends a reference signal to the reversing lamp switch through circuit (V/W). When the transaxle is placed into reverse gear, the reversing lamp switch routes the voltage signal to ground through circuit (B). When the transaxle is placed in REVERSE, the SJB provides ground to an internal solenoid which routes power to circuit (B/P) to the backup lamps.
Power to the trailer tow lamps is controlled by the SJB. Circuits (Y) and (DG) supply power to the trailer tow LH and RH stop/turn lamps respectively. Circuit (BR/W) supplies power to the trailer tow parking lamps. Ground for the trailer lamps is provided on circuit (B).
Power to the trailer tow lamps is controlled by the SJB. Circuits (Y) and (DG) supply power to the trailer tow LH and RH stop/turn lamps respectively. Circuit (BR/W) supplies power to the trailer tow parking lamps.
Principles of Operation
The SJB supplies power and ground to the interior lighting system. The interior lighting system illuminates the interior lamps to enhance visibility of the interior while a vehicle door is open or ajar, and the vehicle speed is lower than 15 km/h (9 mph). The SJB controls all interior lighting functions and timing by monitoring inputs from the door ajar switches, liftgate ajar switch, liftgate glass ajar switch and vehicle speed.
When a door or liftgate is opened, the ajar switch opens the circuit to the SJB. The SJB grounds the interior lamp circuit (P), illuminating the interior lamps.
When a door or liftgate is opened, the ajar switch opens the circuit to the SJB. The SJB grounds the interior lamp circuit (P), illuminating the interior lamps.
When a door or liftgate is opened, the ajar switch opens the circuit to the SJB. The SJB grounds the interior lamp circuit (P), illuminating the interior lamps.
Circuit (V/O) provides power to each demand lamp when activated. The demand lamps are grounded through circuit (B). The battery saver in the SJB deactivates the power and ground circuits after time-out.
Circuit (V/O) provides power to each interior lamp when activated. The interior lamps are grounded through circuit (P). The battery saver in the SJB deactivates the power and ground circuits after time-out.
The illuminated entry provides interior lighting whenever the SJB receives a lamps ON/doors UNLOCK request from the RKE transmitter. The SJB provides the power and ground circuits for the interior/map lamps.
See also:
• SPEED CONTROL ACTUATOR
• CHARGING SYSTEM