Lumbar Support Inoperative w/o A45
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
SCHEMATIC REFERENCE: Lumbar Support Schematics | ||||
1 | Did you review the power seat operation and perform the necessary inspection? | -- | Go to Step 2 | Go to Symptoms |
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 of 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 | Go to Step 2 |
Lumbar Support Inoperative with A45
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
SCHEMATIC REFERENCE: Memory Seats Schematics | ||||
1 | Did you perform the Diagnostic System Check - Power Seat Systems? | -- | Go to Step 2 | |
2 | Measure the voltage from the battery positive voltage circuit of the lumbar switch to a good ground. Does the voltage measure within the specified range? | 9-16 V | Go to Step 3 | Go to Step 6 |
3 | Perform a memory recall function. Did the seat lumbar move when the memory recall function was performed? | -- | Go to Step 4 | Go to Step 5 |
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 9 | Go to Step 7 |
5 | 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 9 | Go to Step 8 |
6 | Repair the open in the battery positive voltage circuit of the lumbar switch. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 9 | -- |
7 | Replace the lumbar switch. Refer to Lumbar Switch Replacement . Did you complete the replacement? | -- | Go to Step 9 | -- |
8 | Replace the memory seat module (MSM). Refer to Memory Seat Control Module Replacement . Did you complete the replacement? | -- | Go to Step 9 | -- |
9 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 |
