Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
DEFINITION: This table diagnoses inoperative lumbar support, does not move out (A45 and/or AM3), in the left seat. | ||||
1 | Did you perform the entire Lumbar Support: Memory System Check? | -- | Go to Step 2 | |
2 |
Does the scan tool indicate that the seat switch input was received? | -- | Go to Step 3 | Go to Step 18 |
3 |
Does the motor run? | -- | Go to Step 4 | Go to Step 6 |
4 | Test for an open or short to ground in CKT 610 (PNK) or (PNK/BLK) between the MSM and the LH lumbar horizontal motor. Refer to Testing for Continuity or Testing for Short to Ground in Wiring Systems. Is the wiring OK? | -- | Go to Step 5 | Go to Step 12 |
5 | Test for an open or short to ground in CKT 611 (DK BLU) or (DK BLU/WHT) between the MSM and the LH lumbar horizontal motor. Refer to Testing for Continuity or Testing for Short to Ground in Wiring Systems. Is the wiring OK? | -- | Go to Step 7 | Go to Step 13 |
6 | Replace the LH lumbar horizontal motor. Is the lumbar horizontal motor replacement complete? | -- | Go to Step 21 | -- |
7 | Test for proper terminal contact at the MSM connectors. Refer to Intermittents and Poor Connections Diagnosis in Wiring Systems. Is terminal contact OK? | -- | Go to Step 8 | Go to Step 14 |
8 | Test for an open in CKT 1840 (ORN) between the MSM connector C2 cavity D and splice S306. Refer to Testing for Continuity in Wiring Systems. Is the wiring OK? | -- | Go to Step 9 | Go to Step 15 |
9 | Test for an open in CKT 742 (RED) between the MSM connector C4 cavity B and splice S311. Refer to Testing for Continuity in Wiring Systems. Is the wiring OK? | -- | Go to Step 10 | Go to Step 16 |
10 | Test for an open in CKT 850 (BLK) between the MSM connector C2 cavity C and splice S351. Refer to Testing for Continuity in Wiring Systems. Is the wiring OK? | -- | Go to Step 11 | Go to Step 17 |
11 | Replace the memory seat module. Refer to Memory Seat Control Module Replacement . Is the memory seat module replacement complete? | -- | Go to Step 21 | -- |
12 | Repair the open or short to ground in CKT 610 (PNK) or (PNK/BLK). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 21 | -- |
13 | Repair the open or short to ground in CKT 611 (DK BLU) or (DK BLU/WHT). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 21 | -- |
14 | Repair the appropriate terminals. Refer to Connector Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 21 | -- |
15 | Repair the open in CKT 1840 (ORN). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 21 | -- |
16 | Repair the open in CKT 742 (RED). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 21 | -- |
17 | Repair the open in CKT 850 (BLK). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 21 | -- |
18 |
Is the resistance less than the specified value? | 5 ohms | Go to Step 19 | Go to Step 20 |
19 | Repair the open in CKT 385 (PPL). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 21 | -- |
20 | Replace the LH lumbar switch. Refer to Lumbar/Heated Seat Switch Replacement - Power . Is the lumbar switch replacement complete? | -- | Go to Step 21 | -- |
21 | Perform the Lumbar Support System Check . Is the system check complete? | -- | System OK | -- |
