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 - Seats |
2 | Verify that the Lumbar Support Inoperative complaint is present. Does the lumbar system operate as described in the system description and operation? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 | Measure the voltage from the battery positive voltage (B+) circuit of the lumbar switch to a good ground. Does the voltage measure within the specified range? | 9-16 V | Go to Step 4 | Go to Step 7 |
4 | Measure the voltage from the battery positive voltage (B+) circuit of the lumbar relays to a good ground. Does the voltage measure within the specified range? | 9-16 V | Go to Step 5 | Go to Step 8 |
5 | Measure the voltage from the battery positive voltage (B+) circuit of the lumbar relays to the ground circuit of the relays. Does the voltage measure within the specified range? | 9-16 V | Go to Step 6 | Go to Step 9 |
6 | 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 11 | Go to Step 10 |
7 | Repair the short to ground or open in the battery positive voltage (B+) circuit of the lumbar switch. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 11 | -- |
8 | Repair the short to ground or open in the battery positive voltage (B+) circuit of the lumbar relays. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 11 | -- |
9 | Repair the open in the ground circuit of the lumbar relays. Refer to Wiring Repairs in Wiring Systems. Is the circuit repair complete? | -- | Go to Step 11 | -- |
10 | Replace the lumbar switch. Refer to Lumbar Switch Replacement . Did you complete the replacement? | -- | Go to Step 11 | -- |
11 | 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 | Yes | No |
|---|---|---|---|
Schematic Reference: Lumbar Support Schematics | |||
1 | Did you perform the Diagnostic System Check - Power Seat Systems? | Go to Step 2 | |
2 | Verify that the Lumbar Support Inoperative complaint is present. Does the lumbar system operate as described in the system description and operation? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | |
3 |
Does the Lumber Switches parameter change state? | ||
4 |
Does the test lamp illuminate? | ||
5 | Test the ground circuit of the lumbar switch for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | ||
6 | 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? | ||
7 | Inspect for poor connections at the harness connector of the memory seat module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | ||
8 | Replace the lumbar switch. Refer to Lumbar Switch Replacement . Did you complete the replacement? | -- | |
9 | Replace the memory seat module (MSM). Refer to Memory Seat Control Module Replacement . Did you complete the replacement? | -- | |
10 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | |
