Lumbar Support Does Not Move Up or Down w/o Memory-A45
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Driver Seat Schematics , Passenger Seat Schematics , or Rear Seat Schematics Connector End View Reference: Power Seat Connector End Views | |||
1 | Did you review the power seat system operation and perform the necessary inspection? | Go to Step 2 | Go to Symptoms - Seats |
2 | Verify that the Lumbar Support Does Not Move Up or Down complaint is present. Does the lumbar support 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 |
Does the test lamp illuminate? | Go to Step 4 | Go to Step 6 |
4 |
Does the test lamp illuminate? | Go to Step 5 | Go to Step 7 |
5 |
Does the test lamp illuminate in both directions? | Go to Step 9 | Go to Step 8 |
6 | Test the lumbar motor up control circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 8 |
7 | Test the lumbar motor down control circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 8 |
8 | Inspect for poor connections at the harness connector of the lumbar adjuster 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 12 | Go to Step 10 |
9 | 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 12 | Go to Step 11 |
10 | Replace the lumbar adjuster switch. Refer to Power Seat Switch Replacement . Did you complete the replacement? | Go to Step 12 | -- |
11 | Replace the lumbar vertical motor. Refer to Front Seat Lumbar Support Replacement . Did you complete the replacement? | Go to Step 12 | -- |
12 | 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 with Memory-A45
Step | Action | 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 Support Does Not Move Up or Down complaint is present. Does the lumbar support 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 |
Does the Seat Lumbar Up parameter change state? | Go to Step 4 | Go to Step 6 |
4 |
Does the Seat Lumbar Down parameter change state? | Go to Step 5 | Go to Step 7 |
5 |
Does the test lamp illuminate in both directions? | Go to Step 14 | Go to Step 8 |
6 |
Does the Seat Lumbar Up parameter change state? | Go to Step 13 | Go to Step 10 |
7 |
Does the Seat Lumbar Down parameter change state? | Go to Step 13 | Go to Step 11 |
8 | Test the lumbar motor up control circuit between the MSM 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 18 | Go to Step 9 |
9 | Test the lumbar motor down control circuit between the MSM 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 18 | Go to Step 12 |
10 | Test the lumbar up switch signal circuit between the lumbar switch and the MSM for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 18 | Go to Step 12 |
11 | Test the lumbar down switch signal circuit between the lumbar switch and the MSM for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 18 | Go to Step 12 |
12 | Inspect for poor connections at the harness connector of the 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 18 | Go to Step 15 |
13 | 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 18 | Go to Step 16 |
14 | 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? | Go to Step 18 | Go to Step 17 |
15 | Replace the MSM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 18 | -- |
16 | Replace the lumbar switch. Refer to Front Seat Lumbar Control Switch Replacement or Rear Seat Lumbar Control Switch Replacement . Did you complete the replacement? | Go to Step 18 | -- |
17 | Replace the lumbar vertical motor. Refer to Front Seat Lumbar Support Replacement or Rear Seat Lumbar Support Replacement . Did you complete the replacement? | Go to Step 18 | -- |
18 | 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 Massaging Lumbar-AM3 w/o Memory-A45
Step | Action | Value (s) | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
Schematic Reference: Driver Seat Schematics or Passenger Seat Schematics Connector End View Reference: Power Seat Connector End Views | ||||||||||
1 | Did you review the lumbar vertical operation and perform the necessary inspection? | -- | Go to Step 2 | Go to Symptoms - Seats | ||||||
2 | Verify that the Lumbar Support Does Not Move Up or Down complaint is present. Does the lumbar support 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 circuit of the massage module to a good ground. Does the voltage measure within the specified range? | 9-16 V | Go to Step 4 | Go to Step 19 | ||||||
4 | Measure the voltage from the battery positive voltage circuit of the massage module to the ground circuit of the massage module. Does the voltage measure within the specified range? | 9-16 V | Go to Step 5 | Go to Step 20 | ||||||
5 |
Does the test lamp illuminate in both directions? | -- | Go to Step 17 | Go to Step 6 | ||||||
6 |
Does the test lamp illuminate? | -- | Go to Step 7 | Go to Step 14 | ||||||
7 |
Does the test lamp illuminate? | -- | Go to Step 8 | Go to Step 15 | ||||||
8 |
Does the voltage measure within the specified range? | 4.50-5.50 V | Go to Step 9 | Go to Step 12 | ||||||
9 |
Does the voltage measure within the specified range? | 0.25-5.50 V | Go to Step 10 | Go to Step 13 | ||||||
10 | Test the lumbar motor up and down 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? | -- | Go to Step 24 | Go to Step 11 | ||||||
11 | Test the lumbar motor up and down control circuits between the massage module and the lumbar vertical motor for a short to battery voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 24 | Go to Step 18 | ||||||
12 | Test the 5-volt reference circuit of the lumbar vertical position sensor for the following conditions:
Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 24 | Go to Step 18 | ||||||
13 | Test the signal circuit of the lumbar vertical position sensor for the following conditions:
Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 24 | Go to Step 18 | ||||||
14 | Test the lumbar up switch signal circuit between the lumbar switch and the massage module 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 24 | Go to Step 16 | ||||||
15 | Test the lumbar down switch signal circuit between the lumbar switch and the massage module 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 24 | Go to Step 16 | ||||||
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? | -- | Go to Step 24 | Go to Step 21 | ||||||
17 | Inspect for poor connections at the harness connectors of the lumbar vertical motor/position sensor assembly. 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 24 | Go to Step 22 | ||||||
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? | -- | Go to Step 24 | Go to Step 23 | ||||||
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? | -- | Go to Step 24 | -- | ||||||
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? | -- | Go to Step 24 | -- | ||||||
21 | Replace the lumbar switch. Refer to Front Seat Lumbar Control Switch Replacement . Did you complete the replacement? | -- | Go to Step 24 | -- | ||||||
22 | Replace the lumbar vertical motor/position sensor assembly. Refer to Front Seat Lumbar Support Replacement . Did you complete the replacement? | -- | Go to Step 24 | -- | ||||||
23 | Replace the lumbar massage module. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | -- | Go to Step 24 | -- | ||||||
24 | 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 Massaging Lumbar-AM3 with Memory-A45
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
This step tests the integrity of the lumbar up switch. If the test lamp illuminates the switch is shorted in the active position. The switch parameter may not display active because, approximately 60 seconds after seeing the switch signal in the active state, the massage module shuts down and no longer relays the active switch signal to the memory seat module (MSM).
-
This step tests the integrity of the lumbar down switch. If the test lamp illuminates the switch is shorted in the active position. The switch parameter may not display active because, approximately 60 seconds after seeing the switch signal in the active state, the massage module shuts down and no longer relays the active switch signal to the MSM.
-
This step tests the integrity of the lumbar up signal circuit to the MSM. If the fuse in the jumper wire opens when you perform this test, the signal circuit is shorted to ground.
-
This step tests the integrity of the lumbar down signal circuit to the MSM. If the fuse in the jumper wire opens when you perform this test, the signal circuit is shorted to ground.
-
This step verifies that the massage module is receiving lumbar up motor control voltage from the MSM.
-
This step verifies that the massage module is receiving lumbar down motor control voltage from the MSM.
-
This step verifies the repair.
Step | Action | 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 Support Does Not Move Up or Down complaint is present. Does the lumbar support 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 | Operate the lumbar switch in the UP and DOWN directions. Does the lumbar vertical motor run for approximately 1 second then stop? | Go to Step 26 | Go to Step 4 |
4 |
Does the Seat Lumbar Up switch parameter change state? | Go to Step 5 | Go to Step 6 |
5 |
Does the Seat Lumbar Down switch parameter change state? | Go to Step 12 | Go to Step 8 |
Does the test lamp illuminate? | Go to Step 22 | Go to Step 7 | |
7 | With the test lamp still connected from the lumbar up switch signal circuit Pin-G of the massage module connector to a good ground, operate the lumbar switch in the UP direction. Does the test lamp illuminate? | Go to Step 10 | Go to Step 15 |
Does the test lamp illuminate? | Go to Step 22 | Go to Step 9 | |
9 | With the test lamp still connected from the lumbar down switch signal circuit Pin-H of the massage module connector to a good ground, operate the lumbar switch in the DOWN direction. Does the test lamp illuminate? | Go to Step 11 | Go to Step 15 |
Does the Seat Lumbar Up switch parameter change state? | Go to Step 20 | Go to Step 16 | |
Does the Seat Lumbar Down switch parameter change state? | Go to Step 20 | Go to Step 16 | |
12 |
Does the test lamp illuminate in both directions? | Go to Step 23 | Go to Step 13 |
Does the test lamp illuminate? | Go to Step 14 | Go to Step 17 | |
Does the test lamp illuminate? | Go to Step 18 | Go to Step 17 | |
15 | 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 31 | Go to Step 22 |
16 | Test the lumbar up/down signal circuits between the massage module and the MSM 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 31 | Go to Step 25 |
17 | Test the lumbar motor up/down control circuits between the MSM and the massage 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 31 | Go to Step 25 |
18 | Test the lumbar motor up/down control circuits between the massage module and the lumbar vertical motor 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 31 | Go to Step 19 |
19 | Test the lumbar vertical position sensor signal circuit between the sensor and the massage module for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 31 | Go to Step 24 |
20 | Test the lumbar motor up/down control circuits between the MSM 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 31 | Go to Step 21 |
21 | Test the lumbar motor up/down control circuits between the massage module and the lumbar vertical motor for a short to battery voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 31 | Go to Step 24 |
22 | 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 31 | Go to Step 27 |
23 | 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 31 | Go to Step 28 |
24 | 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 31 | Go to Step 29 |
25 | Inspect for poor connections at the harness connector of the 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 31 | Go to Step 30 |
26 | Repair the open in the low reference circuit of the lumbar vertical position sensor. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 31 | -- |
27 | Replace the lumbar switch. Refer to Front Seat Lumbar Control Switch Replacement . Did you complete the replacement? | Go to Step 31 | -- |
28 | Replace the lumbar vertical motor. Refer to Front Seat Lumbar Support Replacement . Did you complete the replacement? | Go to Step 31 | -- |
29 | 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 31 | -- |
30 | Replace the MSM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 31 | -- |
Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 | |
