Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
DEFINITION: This table diagnoses inoperative lumbar support, does not move up or down (AM3), in the passenger seat. | ||||
1 | Did you perform the entire Lumbar Support: Memory System Check? | -- | Go to Step 2 | |
2 |
Is the resistance less than the specified value? | 5 ohms | Go to Step 3 | Go to Step 5 |
3 | Test CKT 793 (RED) for an open. Refer to Testing for Continuity in Wiring Systems. Is the wiring OK? | -- | Go to Step 4 | Go to Step 15 |
4 | Test CKT 792 (YEL) for an open. Refer to Testing for Continuity in Wiring Systems. Is the wiring OK? | -- | Go to Step 6 | Go to Step 15 |
5 | Replace the lumbar switch. Refer to Lumbar Switch Replacement . Is the repair complete? | -- | Go to Step 16 | -- |
6 |
Does the motor run? | -- | Go to Step 7 | Go to Step 9 |
7 | Test for an open or short to ground in CKT 793 (TAN) between the lumbar massage module and the passenger lumbar vertical motor. Refer to Testing for Continuity or Testing for Short to Ground in Wiring Systems. Is the wiring OK? | -- | Go to Step 8 | Go to Step 15 |
8 | Test for an open or short to ground in CKT 792 (PPL) between the lumbar massage module and the passenger lumbar vertical motor. Refer to Testing for Continuity or Testing for Short to Ground in Wiring Systems. Is the wiring OK? | -- | Go to Step 10 | Go to Step 15 |
9 | Replace the passenger lumbar vertical motor. Refer to Front Seat Lumbar Support Replacement . Is the repair complete? | -- | Go to Step 16 | -- |
10 | Test for proper terminal contact at the lumbar massage module connector. Refer to Intermittents and Poor Connections Diagnosis in Wiring Systems. Is terminal contact OK? | -- | Go to Step 11 | Go to Step 14 |
11 | Test for an open in CKT 3740 (ORN) between the lumbar massage module connector cavity A and splice S312 (LH drive) or splice S314 (RH drive). Refer to Testing for Continuity in Wiring Systems. Is the wiring OK? | -- | Go to Step 12 | Go to Step 15 |
12 | Test for an open in CKT 650 (BLK) (LH drive) or CKT 550 (BLK) (RH drive) between the lumbar massage module connector cavity J and splice S315 (LH drive) or splice S313 (RH drive). Refer to Testing for Continuity in Wiring Systems. Is the wiring OK? | -- | Go to Step 13 | Go to Step 15 |
13 | Replace the lumbar massage module. Refer to Front Seat Lumbar Support Replacement . Is the repair complete? | -- | Go to Step 16 | -- |
14 | Repair the appropriate terminals. Refer to Connector Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 16 | -- |
15 | Repair the appropriate circuit. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 16 | -- |
16 | Perform the Lumbar Support System Check . Is the system check complete? | -- | System OK | -- |
