Power Lumbar Circuit Description AL2

Battery positive voltage (B+) is supplied at all times to each seat switch via CKT 3740 (ORN) from the rear junction block PWR SEAT circuit breaker. The LH lumbar switch is supplied ground via CKT 550 (BLK) to G302. The RH lumbar switch is supplied ground via CKT 650 (BLK) to G302.

When the lumbar switch is operated to move the lumbar in, battery positive voltage (B+) is applied via the lumbar in switch contacts and CKT 610 (PNK) (LH) or CKT 210 (PNK/BLK) (RH) to the lumbar in/out motor. The motor is grounded via CKT 611 (DK BLU) (LH) or CKT 211 (WHT) (RH) and the lumbar out switch contacts to ground. The motor runs to drive the lumbar in, away from the occupant's back, until the switch is released. Moving the lumbar out works similarly to moving the lumbar in except that the battery positive voltage (B+) and ground are on the opposite circuits causing the motor to run in the opposite direction driving the lumbar out, toward the occupant's back.

When the lumbar switch is operated to move the lumbar up, battery positive voltage (B+) is applied via the lumbar up switch contacts and CKT 768 (TAN) (LH) or CKT 793 (PNK) (RH) to the lumbar up/down motor. The motor is grounded via CKT 767 (PPL) (LH) or CKT 792 (ORN) (RH) and the lumbar down switch contacts to ground. The motor runs to drive the lumbar up until the switch is released. Moving the lumbar down works similarly to moving the lumbar up except that the battery positive voltage (B+) and ground are on the opposite circuits causing the motor to run in the opposite direction driving the lumbar down.

Power Lumbar Circuit Description AC9

Battery positive voltage (B+) is supplied at all times to each adaptive lumbar module via CKT 2840 (ORN) from the rear junction block MEM T&T Fuse. The LH adaptive lumbar module is supplied ground via CKT 550 (BLK) to G302. The RH adaptive lumbar module is supplied ground via CKT 650 (BLK) to G302. Battery positive voltage (B+) is supplied with the ignition switch in the ON position to each adaptive lumbar module ignition input via CKT 41 (BRN) from the rear junction block IGN 3 Fuse. The adaptive seat system only operates when the ignition switch is in the ON position. Battery positive voltage (B+) is supplied with the ignition switch in the ON position to each lumbar switch via CKT 1740 (ORN) from the adaptive lumbar module.

When the lumbar switch is operated to move the lumbar out, battery positive voltage (B+) is applied via the out switch contacts and CKT 1065 (YEL) (LH) or CKT 211 (DK BLU) (RH) to the adaptive lumbar module. In response to this input, the adaptive lumbar module supplies a pulse width modulated signal via CKT 9172 (RED) and ground via CKT 9173 (BLK) to the lumbar pump motor. The lumbar pump motor runs to supply air to the lumbar air bladder in the seat back. Adding air to the bladder increases the support. When the lumbar switch is operated to move the lumbar in, battery positive voltage (B+) is applied via the in switch contacts and CKT 1064 (DK BLU) (LH) or CKT 210 (WHT) (RH) to the adaptive lumbar module. In response to this input, the adaptive lumbar module allows air out of the lumbar support bladder. Releasing air from the bladder decreases the support. The adaptive seat may be manually adjusted at anytime the ignition switch is in the ON position.

When the lumbar switch is moved down in the OFF position, battery positive voltage (B+) is applied via the OFF switch contacts and CKT 2291 (PNK) (LH) or CKT 2293 (PPL) (RH) to the adaptive lumbar module. In response to this input, the adaptive lumbar module will release all air from the air bladders. When the lumbar switch is moved up in the AUTO/ON position, battery positive voltage (B+) is applied via the AUTO/ON switch contacts and CKT 2290 (WHT) (LH) or CKT 2292 (PNK) (RH) to the adaptive lumbar module. In response to this input, the adaptive lumbar module will automatically adjust the support to the occupant by supplying a pulse width modulated signal to the lumbar pump motor to add air into the bladder or release air from the bladder.

Power Lumbar Circuit Description A45

Battery positive voltage (B+) is supplied at all times to the LH lumbar switch via CKT 2840 (ORN) from the rear junction block MEM T&T fuse.

When the LH lumbar switch is operated to move the lumbar in, battery positive voltage (B+) is applied via the lumbar in switch contacts and CKT 1064 (DK BLU) to the memory seat module (MSM). In response to this input, the MSM supplies battery positive voltage (B+) via CKT 610 (WHT) and ground via CKT 611 (DK BLU) to the LH lumbar in/out motor. The motor runs to drive the lumbar in, away from the driver's back, until the switch is released. When the LH lumbar switch is operated to move the lumbar out, battery positive voltage (B+) is applied via the lumbar out switch contacts and CKT 1065 (YEL) to the MSM. In response to this input, the MSM supplies battery positive voltage (B+) via CKT 611 (DK BLU) and ground via CKT 610 (WHT) to the lumbar in/out motor. The motor runs to drive the lumbar out, toward the driver's back, until the switch is released. The MSM will also control the LH lumbar in/out motor during memory recall functions.

When the LH lumbar switch is operated to move the lumbar up, battery positive voltage (B+) is applied via the lumbar up switch contacts and CKT 1066 (WHT) to the memory seat module (MSM). In response to this input, the MSM supplies battery positive voltage (B+) via CKT 768 (PNK) and ground via CKT 767 (ORN) to the LH lumbar up/down motor. The motor runs to drive the lumbar up until the switch is released. When the LH lumbar switch is operated to move the lumbar down, battery positive voltage (B+) is applied via the lumbar down switch contacts and CKT 1067 (YEL/BLK) to the MSM. In response to this input, the MSM supplies battery positive voltage (B+) via CKT 767 (ORN) and ground via CKT 768 (PNK) to the lumbar up/down motor. The motor runs to drive the lumbar down until the switch is released. The MSM will also control the LH lumbar up/down motor during memory recall functions.

The memory seat module (MSM) supplies a 5 volt reference voltage via CKT 788 (GRY) and reference ground via CKT 782 (BLK) to the respective lumbar position sensors. The MSM receives the feedback voltage input from the lumbar in/out position sensor via CKT 1063 (YEL). The MSM receives the feedback voltage input from the lumbar up/down position sensor via CKT 1062 (BLK).