Lumbar Support Inoperative w/o A45
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you review the power seat operation and perform the necessary inspection? | -- | Go to Step 2 | |
2 | Measure the voltage from the battery positive (B+) circuit of the lumbar switch to a good ground. Does the voltage measure within specified range? | 9-16 V | Go to Step 3 | Go to Step 5 |
3 | Measure the voltage from the battery positive (B+) circuit of the lumbar switch to the ground circuit of the lumbar switch. Does the voltage measure within specified range? | 9-16 V | Go to Step 4 | Go to Step 6 |
4 | Inspect for poor connections at the harness connector of the lumbar switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 8 | Go to Step 7 |
5 | Repair the open in the battery positive (B+) voltage circuit and the lumbar switch. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 8 | -- |
6 | Repair the open in the ground circuit of the lumbar switch. Refer to Wiring Repairs in Wiring Systems. Is the circuit repair complete? | -- | Go to Step 8 | -- |
7 | Replace the lumbar switch. Refer to Lumbar Switch Replacement . Did you complete the replacement? | -- | Go to Step 8 | -- |
8 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK |
Lumbar Support Inoperative w/ A45
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Diagnostic System Check - Power Seat Systems? | -- | Go to Step 2 | |
2 | Test the rear fuse block MEM Fuse for an open. Does the MEM Fuse test OK? | -- | Go to Step 5 | Go to Step 3 |
3 | Repair the short to ground in the battery positive voltage circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 4 | -- |
4 | Replace MEM Fuse. Refer to Wiring Repairs in Wiring Systems. Did you complete the replacement? | -- | Go to Step 14 | -- |
5 |
Does the voltage measure within the specified range? | 10-15 V | Go to Step 6 | Go to Step 12 |
6 | Measure the voltage from the battery positive circuit of the LH lumbar switch to the ground circuit of the LH lumbar switch. Does the voltage measure within the specified range? | 10-15 V | Go to Step 7 | Go to Step 13 |
7 | Did the LH lumbar move when a memory recall function was performed? | -- | Go to Step 8 | Go to Step 10 |
8 | Inspect for poor connections at the harness connector of the LH lumbar switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 14 | Go to Step 9 |
9 | Replace the LH lumbar switch. Refer to Lumbar Switch Replacement . Did you complete the replacement? | -- | Go to Step 14 | -- |
10 | Inspect for poor connections at the harness connector of the memory seat module (MSM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 14 | Go to Step 11 |
11 | Replace the memory seat module (MSM). Refer to Memory Seat Control Module Replacement . Did you complete the replacement? | -- | Go to Step 14 | -- |
12 | Repair the open in the battery positive circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 14 | -- |
13 | Repair the open in the ground circuit of the LH lumbar switch. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 14 | -- |
14 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 |
