Lumbar Support Does Not Move Up or Down w/o A45
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
SCHEMATIC REFERENCE: Lumbar Support Schematics | ||||
1 | Did you review the power seat system operation and perform the necessary inspection? | -- | Go to Symptoms | |
2 |
Does the test lamp illuminate? | -- | ||
3 |
Does the test lamp illuminate? | -- | ||
4 |
Does the test lamp illuminate in both directions? | -- | ||
5 | 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? | -- | ||
6 | Inspect for poor connections at the harness connector of the lumbar vertical motor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | ||
7 | Repair the open in the up/down control circuits of the lumbar vertical motor. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | -- | |
8 | Replace the power seat switch. Refer to Power Seat Switch Replacement . Did you complete the replacement? | -- | -- | |
9 | Replace the lumbar vertical motor. Refer to Front Seat Lumbar Support Replacement or Rear Seat Lumbar Support Replacement . Did you complete the replacement? | -- | -- | |
10 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | |
Lumbar Support Does Not Move Up or Down with A45
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
SCHEMATIC REFERENCE: Lumbar Support Schematics | ||||
1 | Did you perform the Diagnostic System Check - Power Seats Systems? | -- | ||
2 |
Does the Seat Lumbar Up parameter change state? | -- | ||
3 |
Does the Seat Lumbar Down parameter change state? | -- | ||
4 |
Does the test lamp illuminate in both directions? | -- | ||
5 |
Does the Seat Lumbar Up parameter change state? | -- | ||
6 |
Does the Seat Lumbar Down parameter change state? | -- | ||
7 | Test the lumbar up motor control circuit between the memory seat module and the lumbar vertical motor for a short to ground or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | ||
8 | Test the lumbar down motor control circuit between the memory seat module and the lumbar vertical motor for a short to ground or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | ||
9 | Test the lumbar up input circuit between the power seat switch and the memory seat module for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | ||
10 | Test the lumbar down input circuit between the power seat switch and the memory seat module for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | ||
11 | 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? | -- | ||
12 | Inspect for poor connections at the harness connector of the power seat switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | ||
13 | Inspect for poor connections at the harness connector of the lumbar vertical motor. Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | ||
14 | Replace the memory seat module (MSM). Refer to Memory Seat Control Module Replacement . Did you complete the replacement? | -- | -- | |
15 | Replace the power seat switch. Refer to Power Seat Switch Replacement . Did you complete the replacement? | -- | -- | |
16 | Replace the seat lumbar vertical motor. Refer to Front Seat Lumbar Support Replacement . Did you complete the replacement? | -- | -- | |
17 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | |
Lumbar Support Does Not Move Up or Down AM3 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 |
Does the Seat Lumbar UP parameter change state? | -- | Go to Step 3 | Go to Step 4 |
3 |
Does the Seat Lumbar Down parameter change state? | -- | Go to Step 8 | Go to Step 5 |
4 |
Does the test lamp illuminate? | -- | Go to Step 6 | Go to Step 11 |
5 |
Does the test lamp illuminate? | -- | Go to Step 7 | Go to Step 11 |
6 |
Does the Seat Lumbar Up parameter change state? | -- | Go to Step 17 | Go to Step 12 |
7 |
Does the Seat Lumbar Down parameter change state? | -- | Go to Step 17 | Go to Step 12 |
8 |
Does the test lamp illuminate in both directions? | -- | Go to Step 16 | Go to Step 9 |
9 |
Does the test lamp illuminate? | -- | Go to Step 10 | Go to Step 13 |
10 |
Does the test lamp illuminate? | -- | Go to Step 14 | Go to Step 13 |
11 | Test the lumbar up/down switch signal circuits between the lumbar switch and the massage module for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 23 | Go to Step 15 |
12 | Test the lumbar up/down output circuits from the massage module to the memory seat module 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? | -- | Go to Step 23 | Go to Step 18 |
13 | Test the lumbar up/down input circuits from the memory seat module to the massage module for a short to ground, high resistance, or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 23 | Go to Step 18 |
14 | Test the lumbar up/down control circuits between the massage module and the lumbar vertical motor for a short to ground or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 23 | Go to Step 17 |
15 | 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 23 | Go to Step 19 |
16 | Inspect for poor connections at the harness connector of the lumbar vertical motor. 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 23 | Go to Step 20 |
17 | Inspect for poor connections at the harness connector of the massage module. Refer to Circuit Testing and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 23 | Go to Step 21 |
18 | 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? | -- | Go to Step 23 | Go to Step 22 |
19 | Replace the lumbar switch. Refer to Power Seat Switch Replacement . Did you complete the replacement? | -- | Go to Step 23 | -- |
20 | Replace the lumbar vertical motor. Refer to Front Seat Lumbar Support Replacement . Did you complete the replacement? | -- | Go to Step 23 | -- |
21 | Replace the massage module. Refer to Massaging Lumbar Control Module Replacement . Did you complete the replacement? | -- | Go to Step 23 | -- |
22 | Replace the memory seat module. Refer to Memory Seat Control Module Replacement . Did you complete the replacement? | -- | Go to Step 23 | -- |
23 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 |
Lumbar Support Does Not Move Up or Down AM3 w/o A45
Step | Action | Value (s) | Yes | No |
SCHEMATIC REFERENCE: Lumbar Support Schematics | ||||
1 | Did you review the lumbar vertical operation and perform the necessary inspection? | -- | Go to Symptoms | |
2 | Operate the lumbar switch in the UP or DOWN direction. Does the lumbar vertical motor run for 2 seconds then stop? | -- | ||
3 |
Does the test lamp illuminate in both directions? | -- | ||
4 |
Does the test lamp illuminate in both directions? | -- | ||
5 | Measure the voltage from the battery positive voltage circuit of the massage module harness connector to a good ground. Does the voltage measure within the specified range? | 9-16 V | ||
6 | Measure the voltage from the battery positive voltage circuit of the massage module harness connector to the ground circuit of the massage module. Does the voltage measure within the specified range? | 9-16 V | ||
7 | Test the signal circuit of the lumbar vertical position sensor for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | ||
8 | Test the ground circuit of the lumbar vertical position sensor for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | ||
9 |
Does the voltage change state? | -- | ||
10 | Test the signal circuit of the lumbar vertical position sensor for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | ||
11 | Test the signal circuit of the lumbar vertical position sensor for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | ||
12 | Test the 5 volt reference circuit of the lumbar vertical sensor 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? | -- | ||
13 | Test the 5 volt reference circuit of the lumbar vertical sensor for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | ||
14 | Test the lumbar vertical control circuits between the massage module and the lumbar vertical motor for a short to ground, high resistance, or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | ||
15 | Test the lumbar vertical input circuits between the lumbar switch and the massage module for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | ||
16 | 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? | -- | ||
17 | Inspect for poor connections at the harness connectors of the lumbar vertical motor and position sensor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | ||
18 | Inspect for poor connections at the harness connector of the lumbar massage module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | ||
19 | Repair the open in the battery positive voltage circuit of the lumbar massage module. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | -- | |
20 | Repair the open in the ground circuit of the lumbar massage module. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | -- | |
21 | Replace the lumbar switch. Refer to Power Seat Switch Replacement . Did you complete the replacement? | -- | -- | |
22 | Replace the lumbar vertical motor and sensor assembly. Refer to Front Seat Lumbar Support Replacement . Did you complete the replacement? | -- | -- | |
23 | Replace the lumbar massage module. Refer to Massaging Lumbar Control Module Replacement . Did you complete the replacement? | -- | -- | |
24 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | |
