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 Symptoms | |
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 | ||
3 | Measure the voltage from the battery positive circuit of the lumbar switch to the ground circuit of the lumbar switch. Does the voltage measure within the specified range? | 9-16 V | ||
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? | -- | ||
5 | 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? | -- | -- | |
6 | Repair the open in the ground circuit of the lumbar switch. Refer to Wiring Repairs in Wiring Systems. Is the circuit repair complete? | -- | -- | |
7 | Replace the lumbar switch. Refer to Power Seat Switch Replacement . Did you complete the replacement? | -- | -- | |
8 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | |
Lumbar Support Inoperative with A45
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
SCHEMATIC REFERENCE: Lumbar Support 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 | ||
3 | Did the lumbar move when a memory recall function was performed? | -- | ||
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? | -- | ||
5 | 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? | 9-16 V | ||
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? | -- | -- | |
7 | Replace the lumbar switch. Refer to Power Seat Switch Replacement . Did you complete the replacement? | -- | -- | |
8 | Replace the memory seat module (MSM). Refer to Memory Seat Control Module Replacement . Did you complete the replacement? | -- | -- | |
9 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | ||
Lumbar Support Inoperative with AC9
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 Symptoms | |
2 | Verify the customer complaint. Does the 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 voltage measure within the specified range? | 9-16 V | ||
4 | Measure the voltage from the battery positive voltage (B+) circuit of the adaptive lumbar module connector to a good ground. Does the voltage measure within the specified range? | 9-16 V | ||
5 | Measure the voltage from the battery positive voltage (B+) circuit of the adaptive lumbar module connector to the ground circuit of the adaptive lumbar module connector. Does the voltage measure within the specified range? | 9-16 V | ||
6 |
Does the voltage measure within the specified range? | 9-16 V | ||
7 |
Does the voltage from any of the circuits measure greater than the specified value? | 0 V | ||
8 | With the adaptive lumbar module connector connected, measure the voltage from the auto input circuit of the module connector while operating the lumbar switch in the AUTO/ON direction. Does the voltage measure within the specified range? | 6-10 V | ||
9 | With the adaptive lumbar module connector connected, measure the voltage from the off input circuit of the adaptive lumbar module connector while operating the lumbar switch in the OFF direction. Does the voltage measure within the specified range? | 6-10 V | ||
10 | With the adaptive lumbar module connector connected, measure the voltage from the lumbar back input circuit of the adaptive lumbar module connector while operating the lumbar switch in the BACK direction. Does the voltage measure within the specified range? | 6-10 V | ||
11 | With the adaptive lumbar module connector connected, measure the voltage from the lumbar forward input circuit of the adaptive lumbar module connector while operating the lumbar switch in the FORWARD direction. Does the voltage measure within the specified range? | 6-10 V | ||
12 |
Does the voltage measure within the specified range? | 6-10 V | ||
13 |
Does the voltage measure within the specified range? | 6-10 V | ||
14 |
Does the voltage measure within the specified range? | 6-10 V | ||
15 |
Does the voltage measure within the specified range? | 6-10 V | ||
16 | Test the appropriate lumbar switch circuit between the adaptive lumbar module and the lumbar switch for a short to ground, a high resistance, or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | ||
17 | Test the battery positive voltage (B+) circuit of the lumbar switch for a short to ground, a high resistance, or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | ||
18 | Test the lumbar switch circuits between the adaptive lumbar module and the lumbar switch for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | ||
19 | Perform a mechanical inspection of the adaptive lumbar module assembly and bladders for air leaks and restricted air lines. Did you find and correct the condition? | -- | ||
20 | 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? | -- | ||
21 | Inspect for poor connections at the harness connector of the adaptive lumbar module. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | ||
22 | Repair the open or short to ground in the IGN 3 circuit of the adaptive lumbar module. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | -- | |
23 | Repair the open or short to ground in the battery positive voltage (B+) circuit of the adaptive lumbar module. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | -- | |
24 | Repair the open in the ground circuit of the adaptive lumbar module. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | -- | |
25 | Replace the lumbar switch. Refer to Power Seat Switch Replacement . Did you complete the replacement? | -- | -- | |
26 | Replace the adaptive lumbar module. Refer to Front Seat Lumbar Support Replacement . Did you complete the replacement? | -- | -- | |
27 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | |
