Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: Driver Seat Schematics Connector End View Reference: Power Seat Connector End Views | ||||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
2 | Verify that the Lumbar Massage Always On complaint is present. Does the lumbar massage 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 |
Does the test lamp illuminate? | -- | Go to Step 4 | Go to Step 8 |
4 | Probe the lumbar up signal circuit Pin-S of the massage module with a test lamp that is connected to a good ground. Does the test lamp illuminate? | -- | Go to Step 13 | Go to Step 5 |
5 | Probe the lumbar down signal circuit Pin-R of the massage module with a test lamp that is connected to a good ground. Does the test lamp illuminate? | -- | Go to Step 14 | Go to Step 6 |
6 | Measure the voltage from the lumbar vertical position sensor signal circuit of the massage module to a good ground. Does the voltage measure within the specified range? | 0.25-4.75 V | Go to Step 12 | Go to Step 7 |
7 | Does the voltage measure greater than the specified value? | 4.75 V | Go to Step 15 | Go to Step 9 |
8 | Test the lumbar down switch signal circuit between the massage module and the lumbar switch for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 19 | Go to Step 10 |
9 | Test the lumbar vertical position sensor signal circuit between the sensor and the massage module for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 19 | Go to Step 11 |
10 | 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 19 | Go to Step 16 |
11 | Inspect for poor connections at the harness connector of the lumbar vertical position sensor. 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 19 | Go to Step 17 |
12 | Inspect for poor connections at the harness connector of the massage module. 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 19 | Go to Step 18 |
13 | Repair the short to voltage in the lumbar up signal circuit between the massage module and the memory seat module. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 19 | -- |
14 | Repair the short to voltage in the lumbar down signal circuit between the massage module and the memory seat module. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 19 | -- |
15 | Repair the short to voltage in the lumbar vertical position sensor signal circuit between the sensor and the massage module. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 19 | -- |
16 | Replace the lumbar switch. Refer to Front Seat Lumbar Control Switch Replacement . Did you complete the replacement? | -- | Go to Step 19 | -- |
17 | Replace the lumbar vertical motor/position sensor assembly. Refer to Front Seat Lumbar Support Replacement . Did you complete the replacement? | -- | Go to Step 19 | -- |
18 | Replace the massage module. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | -- | Go to Step 19 | -- |
19 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 |
