Intermittent
Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
Power Seat Inoperative (with memory)
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Driver Seat Schematics Connector End View Reference: Power Seat Systems Connector End Views DEFINITION: All of the seat adjuster motors are inoperative, the lumbar and bolster motors may also be inoperative. | |||
| 1 | Did you perform the Power Seat Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Power Seat Systems |
| 2 | Verify the condition is present. Does the system operate normally? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Install a scan tool. Observe the Seat Adjuster Switch parameters in the driver seat module (DSM) Input/Output data list. Do all of the Seat Adjuster Switch parameters display Active? | Go to Step 7 | Go to Step 4 |
| 4 | Operate the seat adjuster switches in both directions. Does the scan tool display the correct switch status parameters in relation to the actual switch positions? | Go to Step 9 | Go to Step 5 |
| 5 | Disconnect the seat adjuster switch connector. Using a DMM test for battery voltage at the switch supply voltage circuit terminal in the harness connector. Is battery voltage present on the switch supply voltage circuit? | Go to Step 8 | Go to Step 6 |
| 6 | Test the switch supply voltage circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 9 |
| 7 | Disconnect the seat adjuster switch connector. Test the active switch signal circuit 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 12 | Go to Step 9 |
| 8 | Inspect for poor connections at the seat adjuster switch connector. 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 DSM connectors. 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 seat adjuster switch. Refer to Seat Switch Replacement - Power Is the repair complete? | Go to Step 12 | |
| 11 | Replace the DSM. Refer to Memory Seat Control Module Replacement . Is the repair complete? | Go to Step 12 | |
| 12 | Operate the system to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
Power Seat Inoperative (with memory)
Power Seat Inoperative (w/o Memory)
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Driver Seat Schematics , Passenger Seat Schematics Connector End View Reference: Power Seat Systems Connector End Views DEFINITION: All of the seat adjuster motors are inoperative, the lumbar and bolster motors may also be inoperative. | |||
| 1 | Did you review the Power Seats System Description and Operation? | Go to Step 2 | Go to Symptoms - Seats |
| 2 | Verify the condition is present. Does the system operate normally? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Disconnect the seat adjuster switch connector. Connect a test lamp from the battery voltage supply circuit terminal in the harness connector to a good ground. Does the test lamp illuminate? | Go to Step 4 | Go to Step 5 |
| 4 | Connect a test lamp from the battery voltage supply circuit terminal to the ground circuit terminal in the seat adjuster switch harness connector. Does the test lamp illuminate? | Go to Step 7 | Go to Step 6 |
| 5 | Repair the battery voltage supply circuit for an open or short to ground. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | Go to Step 9 | |
| 6 | Repair the ground circuit for an open or high resistance. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | Go to Step 9 | |
| 7 | Inspect for poor connections at the seat adjuster switch harness connector. 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 9 | Go to Step 8 |
| 8 | Replace the seat adjuster switch. Refer to Seat Switch Replacement - Power . Is the repair complete? | Go to Step 9 | |
| 9 | Operate the system to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
Power Seat Inoperative (w/o Memory)
Power Seat Does Not Move Forward/Rearward (with memory)
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Driver Seat Schematics Connector End View Reference: Power Seat Systems Connector End Views | |||
| 1 | Did you perform the Power Seat Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Power Seat Systems |
| 2 | Verify the condition is present. Does the system operate normally? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Install a scan tool. Observe the Horizontal Forward and Rearward Switch parameters in the driver seat module Input/Output data list. Do either of the Horizontal Switch parameters display Active? | Go to Step 4 | Go to Step 5 |
| 4 | Disconnect the seat adjuster switch connector. Do both of the Horizontal Switch parameters display Inactive? | Go to Step 12 | Go to Step 9 |
| 5 | Operate the horizontal forward switch. Does the scan tool display the horizontal forward switch as Active? | Go to Step 6 | Go to Step 7 |
| 6 | Operate the horizontal rearward switch. Does the scan tool display the horizontal rearward switch as Active? | Go to Step 13 | Go to Step 8 |
| 7 | Disconnect the seat adjuster switch connector. Connect a fused jumper wire from the battery voltage supply circuit terminal to the horizontal forward switch signal circuit terminal in the harness connector. Does the scan tool display the horizontal forward switch as Active? | Go to Step 12 | Go to Step 10 |
| 8 | Disconnect the seat adjuster switch connector. Connect a fused jumper wire from the battery voltage supply circuit terminal to the horizontal rearward switch signal circuit terminal in the harness connector. Does the scan tool display the horizontal rearward switch as Active? | Go to Step 12 | Go to Step 11 |
| 9 | Test the active horizontal switch signal circuit 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 16 | Go to Step 13 |
| 10 | Test the horizontal forward switch signal circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 16 | Go to Step 13 |
| 11 | Test the horizontal rearward switch signal circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 16 | Go to Step 13 |
| 12 | Inspect for poor connections at the seat adjuster switch harness connector. 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 16 | Go to Step 14 |
| 13 | Inspect for poor connections at the driver seat module (DSM) harness connectors. 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 16 | Go to Step 15 |
| 14 | Replace the seat adjuster switch. Refer to Seat Switch Replacement - Power . Is the repair complete? | Go to Step 16 | |
| 15 | Replace the DSM. Refer to Memory Seat Control Module Replacement . Is the repair complete? | Go to Step 16 | |
| 16 | Operate the system to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
Power Seat Does Not Move Forward/Rearward (with Memory)
Power Seat Does Not Move Forward/Rearward (w/o Memory)
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Driver Seat Schematics , Passenger Seat Schematics Connector End View Reference: Power Seat Systems Connector End Views | |||
| 1 | Did you review the Power Seat System Description and Operation and perform the necessary inspections? | Go to Step 2 | Go to Symptoms - Seats |
| 2 | Verify the condition is present. Does the system operate normally? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Disconnect the horizontal adjuster motor connector. Connect a test lamp between the horizontal motor control circuit terminals in the harness connector. Operate the horizontal adjuster switch in both directions. Does the test lamp illuminate when the switch is operated in both directions? | Go to Step 6 | Go to Step 4 |
| 4 | Test the horizontal motor control circuits for an open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 9 | Go to Step 5 |
| 5 | Inspect for poor connections at the seat 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 9 | Go to Step 7 |
| 6 | Inspect for poor connections at the horizontal adjuster 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 9 | Go to Step 8 |
| 7 | Replace the seat adjuster switch. Refer to Seat Switch Replacement - Power . Is the repair complete? | Go to Step 9 | |
| 8 | Replace the horizontal adjuster motor. Refer to Seat Adjuster Motor Replacement - Front . Is the repair complete? | Go to Step 9 | |
| 9 | Operate the system to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
Power Seat Does Not Move Forward/Rearward (w/o Memory)
Power Seat Does Not Tilt Forward (with Memory)
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Driver Seat Schematics Connector End View Reference: Power Seat Systems Connector End Views | |||
| 1 | Did you perform the Power Seat Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Power Seat Systems |
| 2 | Verify the condition is present. Does the system operate normally? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Install a scan tool. Observe the Front Vertical Up and Down Switch parameters in the driver seat module (DSM) Input/Output data list. Do either of the Front Vertical Switch parameters display Active? | Go to Step 4 | Go to Step 5 |
| 4 | Disconnect the seat adjuster switch connector. Do both of the Front Vertical Switch parameters display Inactive? | Go to Step 12 | Go to Step 9 |
| 5 | Operate the front vertical up switch. Does the scan tool display the front vertical up switch as Active? | Go to Step 6 | Go to Step 7 |
| 6 | Operate the front vertical down switch. Does the scan tool display the front vertical down switch as Active? | Go to Step 13 | Go to Step 8 |
| 7 | Disconnect the seat adjuster switch connector. Connect a fused jumper wire from the battery voltage supply circuit terminal to the front vertical up switch signal circuit terminal in the harness connector. Does the scan tool display the front vertical up switch as Active? | Go to Step 12 | Go to Step 10 |
| 8 | Disconnect the seat adjuster switch connector. Connect a fused jumper wire from the battery voltage supply circuit terminal to the front vertical down switch signal circuit terminal in the harness connector. Does the scan tool display the front vertical down switch as Active? | Go to Step 12 | Go to Step 11 |
| 9 | Test the active front vertical switch signal circuit 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 16 | Go to Step 13 |
| 10 | Test the front vertical up switch signal circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 16 | Go to Step 13 |
| 11 | Test the front vertical down switch signal circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 16 | Go to Step 13 |
| 12 | Inspect for poor connections at the seat adjuster switch harness connector. 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 16 | Go to Step 14 |
| 13 | Inspect for poor connections at the DSM harness connectors. 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 16 | Go to Step 15 |
| 14 | Replace the seat adjuster switch. Refer to Seat Switch Replacement - Power . Is the repair complete? | Go to Step 16 | |
| 15 | Replace the DSM. Refer to Memory Seat Control Module Replacement . Is the repair complete? | Go to Step 16 | |
| 16 | Operate the system to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
Power Seat Does Not Tilt Forward (with Memory)
Power Seat Does Not Tilt Forward (w/o Memory)
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Driver Seat Schematics , Passenger Seat Schematics Connector End View Reference: Power Seat Systems Connector End Views | |||
| 1 | Did you review the Power Seats System Description and Operation and perform the necessary inspections? | Go to Step 2 | Go to Symptoms - Seats |
| 2 | Verify the condition is present. Does the system operate normally? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Disconnect the front vertical adjuster motor connector. Connect a test lamp between the front vertical motor control circuit terminals in the harness connector. Operate the front vertical adjuster switch in both directions. Does the test lamp illuminate when the switch is operated in both directions? | Go to Step 6 | Go to Step 4 |
| 4 | Test the front vertical motor control circuits for an open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 9 | Go to Step 5 |
| 5 | Inspect for poor connections at the seat 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 9 | Go to Step 7 |
| 6 | Inspect for poor connections at the front vertical adjuster 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 9 | Go to Step 8 |
| 7 | Replace the seat adjuster switch. Refer to Seat Switch Replacement - Power . Is the repair complete? | Go to Step 9 | |
| 8 | Replace the front vertical adjuster motor. Refer to Seat Adjuster Motor Replacement - Front . Is the repair complete? | Go to Step 9 | |
| 9 | Operate the system to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Power Seat Does Not Tilt Forward (w/o Memory)
Power Seat Does Not Tilt Rearward (with Memory)
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Driver Seat Schematics Connector End View Reference: Power Seat Systems Connector End Views | |||
| 1 | Did you perform the Power Seat Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Power Seat Systems |
| 2 | Verify the condition is present. Does the system operate normally? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Install a scan tool. Observe the Rear Vertical Up and Down Switch parameters in the driver seat module (DSM) Input/Output data list. Do either of the Rear Vertical Switch parameters display Active? | Go to Step 4 | Go to Step 5 |
| 4 | Disconnect the seat adjuster switch connector. Do both of the Rear Vertical Switch parameters display Inactive? | Go to Step 12 | Go to Step 9 |
| 5 | Operate the rear vertical up switch. Does the scan tool display the rear vertical up switch as Active? | Go to Step 6 | Go to Step 7 |
| 6 | Operate the rear vertical down switch. Does the scan tool display the rear vertical down switch as Active? | Go to Step 13 | Go to Step 8 |
| 7 | Disconnect the seat adjuster switch connector. Connect a fused jumper wire from the battery voltage supply circuit terminal to the rear vertical up switch signal circuit terminal in the harness connector. Does the scan tool display the rear vertical up switch as Active? | Go to Step 12 | Go to Step 10 |
| 8 | Disconnect the seat adjuster switch connector. Connect a fused jumper wire from the battery voltage supply circuit terminal to the rear vertical down switch signal circuit terminal in the harness connector. Does the scan tool display the rear vertical down switch as Active? | Go to Step 12 | Go to Step 11 |
| 9 | Test the active rear vertical switch signal circuit 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 16 | Go to Step 13 |
| 10 | Test the rear vertical up switch signal circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 16 | Go to Step 13 |
| 11 | Test the rear vertical down switch signal circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 16 | Go to Step 13 |
| 12 | Inspect for poor connections at the seat adjuster switch harness connector. 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 16 | Go to Step 14 |
| 13 | Inspect for poor connections at the DSM harness connectors. 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 16 | Go to Step 15 |
| 14 | Replace the seat adjuster switch. Refer to Seat Switch Replacement - Power . Is the repair complete? | Go to Step 16 | |
| 15 | Replace the DSM. Refer to Memory Seat Control Module Replacement . Is the repair complete? | Go to Step 16 | |
| 16 | Operate the system to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
Power Seat Does Not Tilt Rearward (with Memory)
Power Seat Does Not Tilt Rearward (w/o Memory)
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Driver Seat Schematics , Passenger Seat Schematics Connector End View Reference: Power Seat Systems Connector End Views | |||
| 1 | Did you review the Power Seats System Description and Operation and perform the necessary inspections? | Go to Step 2 | Go to Symptoms - Seats |
| 2 | Verify the condition is present. Does the system operate normally? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Disconnect the rear vertical adjuster motor connector. Connect a test lamp between the rear vertical motor control circuit terminals in the harness connector. Operate the rear vertical adjuster switch in both directions. Does the test lamp illuminate when the switch is operated in both directions? | Go to Step 6 | Go to Step 4 |
| 4 | Test the rear vertical motor control circuits for an open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 9 | Go to Step 5 |
| 5 | Inspect for poor connections at the seat 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 9 | Go to Step 7 |
| 6 | Inspect for poor connections at the rear vertical adjuster 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 9 | Go to Step 8 |
| 7 | Replace the seat adjuster switch. Refer to Seat Switch Replacement - Power . Is the repair complete? | Go to Step 9 | |
| 8 | Replace the rear vertical adjuster motor. Refer to Seat Adjuster Motor Replacement - Front . Is the repair complete? | Go to Step 9 | |
| 9 | Operate the system to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
Power Seat Does Not Tilt Rearward (w/o Memory)
Power Seat Does Not Recline (with Memory)
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Driver Seat Schematics Connector End View Reference: Power Seat Systems Connector End Views | |||
| 1 | Did you perform the Power Seat Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Power Seat Systems |
| 2 | Verify the condition is present. Does the system operate normally? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Install a scan tool. Observe the Recline Forward and Rearward Switch parameters in the driver seat module (DSM) Input/Output data list. Do either of the Recline Switch parameters display Active? | Go to Step 4 | Go to Step 5 |
| 4 | Disconnect the seat adjuster switch connector. Do both of the Recline Switch parameters display Inactive? | Go to Step 12 | Go to Step 9 |
| 5 | Operate the recline forward switch. Does the scan tool display the recline forward switch as Active? | Go to Step 6 | Go to Step 7 |
| 6 | Operate the recline rearward switch. Does the scan tool display the recline rearward switch as Active? | Go to Step 13 | Go to Step 8 |
| 7 | Disconnect the seat adjuster switch connector. Connect a fused jumper wire from the battery voltage supply circuit terminal to the recline forward switch signal circuit terminal in the harness connector. Does the scan tool display the recline forward switch as Active? | Go to Step 12 | Go to Step 10 |
| 8 | Disconnect the seat adjuster switch connector. Connect a fused jumper wire from the battery voltage supply circuit terminal to the recline rearward switch signal circuit terminal in the harness connector. Does the scan tool display the recline rearward switch as Active? | Go to Step 12 | Go to Step 11 |
| 9 | Test the active recline switch signal circuit 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 16 | Go to Step 13 |
| 10 | Test the recline forward switch signal circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 16 | Go to Step 13 |
| 11 | Test the recline rearward switch signal circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 16 | Go to Step 13 |
| 12 | Inspect for poor connections at the seat adjuster switch harness connector. 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 16 | Go to Step 14 |
| 13 | Inspect for poor connections at the DSM harness connectors. 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 16 | Go to Step 15 |
| 14 | Replace the seat adjuster switch. Refer to Seat Switch Replacement - Power . Is the repair complete? | Go to Step 16 | |
| 15 | Replace the DSM. Refer to Memory Seat Control Module Replacement . Is the repair complete? | Go to Step 16 | |
| 16 | Operate the system to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
Power Seat Does Not Recline (with Memory)
Power Seat Does Not Recline (w/o Memory)
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Driver Seat Schematics , Passenger Seat Schematics Connector End View Reference: Power Seat Systems Connector End Views | |||
| 1 | Did you review the Power Seats System Description and Operation and perform the necessary inspections? | Go to Step 2 | Go to Symptoms - Seats |
| 2 | Verify the condition is present. Does the system operate normally? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Disconnect the recline adjuster motor connector. Connect a test lamp between the recline motor control circuit terminals in the harness connector. Operate the recline adjuster switch in both directions. Does the test lamp illuminate when the switch is operated in both directions? | Go to Step 6 | Go to Step 4 |
| 4 | Test the recline motor control circuits for an open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 9 | Go to Step 5 |
| 5 | Inspect for poor connections at the seat 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 9 | Go to Step 7 |
| 6 | Inspect for poor connections at the recline adjuster 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 9 | Go to Step 8 |
| 7 | Replace the seat adjuster switch. Refer to Seat Switch Replacement - Power . Is the repair complete? | Go to Step 9 | |
| 8 | Replace the recline adjuster motor. Refer to Seat Adjuster Motor Replacement - Front . Is the repair complete? | Go to Step 9 | |
| 9 | Operate the system to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
Power Seat Does Not Recline (w/o Memory)
Memory Seat Feature Inoperative
| Step | Action | Values | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Driver Seat Schematics Connector End View Reference: Power Seat Systems Connector End Views DEFINITION: One or more of the memory recall functions are inoperative. | ||||
| 1 | Did you perform the Power Seat Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Power Seat Systems | |
| 2 | Attempt to set and recall memory 1, memory 2, and exit seat position settings. Does the system operate normally? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 | |
| 3 | Install a scan tool. Observe the Memory Switch parameter in the driver door module (DDM) Inputs data list. Press the memory 1 switch. Does the scan tool display the memory 1 switch as Active only while the switch is pressed? | Go to Step 4 | Go to Step 6 | |
| 4 | Observe the Memory Switch parameter in the DDM Inputs data list. Press the memory 2 switch. Does the scan tool display the memory 2 switch as Active only while the switch is pressed? | Go to Step 5 | Go to Step 7 | |
| 5 | Observe the Memory Switch parameter in the DDM Inputs data list. Press the EXIT switch. Does the scan tool display the EXIT switch as Active only while the switch is pressed? | Go to Step 12 | Go to Step 8 | |
| 6 | Disconnect the memory switch connector from the DDM. Using a DMM test the resistance through the memory switch from the switch supply voltage circuit terminal to the memory 1 switch signal circuit terminal in the switch harness connector. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Press the memory 1 switch. Is the resistance less than the specified value only while the switch is pressed? | 0.5 ohms | Go to Step 13 | Go to Step 11 |
| 7 | Disconnect the memory switch connector from the DDM. Using a DMM test the resistance through the memory switch from the switch supply voltage circuit terminal to the memory 2 switch signal circuit terminal in the switch harness connector. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Press the memory 2 switch. Is the resistance less than the specified value only while the switch is pressed? | 0.5 ohms | Go to Step 13 | Go to Step 11 |
| 8 | Disconnect the memory switch connector from the DDM. Using a DMM test the resistance through the memory switch from the switch supply voltage circuit terminal to the memory 1 switch signal circuit terminal in the switch harness connector. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Press the EXIT switch. Is the resistance less than the specified value? | 0.5 ohms | Go to Step 9 | Go to Step 11 |
| 9 | Using a DMM test the resistance through the memory switch from the switch supply voltage circuit terminal to the memory 2 switch signal circuit terminal in the switch harness connector. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Press the EXIT switch. Is the resistance less than the specified value only while the switch is pressed? | 0.5 ohms | Go to Step 10 | Go to Step 11 |
| 10 | Test the memory switch signal circuits in the switch harness for a short to ground or voltage. Refer to Circuit Testing in Wiring Systems. Are either of the switch signal circuits shorted to ground or voltage? | Go to Step 14 | Go to Step 13 | |
| 11 | Inspect for poor connections at the memory switch connector. 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 17 | Go to Step 14 | |
| 12 | Inspect for poor connections at the driver seat module (DSM) connectors. 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 17 | Go to Step 15 | |
| 13 | Inspect for poor connections at the DDM connector. 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 17 | Go to Step 16 | |
| 14 | Replace the memory switch. Refer to Heated Seat Switch Replacement - Front . Is the repair complete? | Go to Step 17 | ||
| 15 | Replace the DSM. Refer to Memory Seat Control Module Replacement . Is the repair complete? | Go to Step 17 | ||
| 16 | Replace the DDM. Refer to Switch Replacement - Door Lock and Side Window - Driver in Doors. Is the repair complete? | Go to Step 17 | ||
| 17 | Operate the memory seat system to verify the repair. Did you correct the condition? | System OK | Go to Step 3 | |
Memory Seat Feature Inoperative
Lumbar Support Inoperative (with Memory)
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Driver Seat Schematics Connector End View Reference: Power Seat Systems Connector End Views | |||
| 1 | Did you perform the Power Seat Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Power Seat Systems |
| 2 | Verify the condition is present. Does the system operate normally? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Install a scan tool. Observe the Lumbar and Torso Switch parameters in the driver seat module (DSM) Input/Output data list. Do any of the Lumbar or Torso Switch parameters display Active? | Go to Step 4 | Go to Step 5 |
| 4 | Disconnect the lumbar adjuster switch connector. Do all of the Lumbar or Torso Switch parameters display Inactive? | Go to Step 18 | Go to Step 13 |
| 5 | Observe the Lumbar Forward Switch parameter in the DSM Input/Output data list. Operate the lumbar forward switch. Does the scan tool display the lumbar forward switch as active? | Go to Step 6 | Go to Step 9 |
| 6 | Observe the Lumbar Rearward Switch parameter in the DSM Input/Output data list. Operate the lumbar rearward switch. Does the scan tool display the lumbar rearward switch as active? | Go to Step 7 | Go to Step 10 |
| 7 | Observe the Torso Inward Switch parameter in the DSM Input/Output data list. Operate the torso inward switch. Does the scan tool display the torso inward switch as active? | Go to Step 8 | Go to Step 11 |
| 8 | Observe the Torso Outward Switch parameter in the DSM Input/Output data list. Operate the torso outward switch. Does the scan tool display the torso outward switch as active? | Go to Step 19 | Go to Step 12 |
| 9 | Disconnect the lumbar switch connector. Connect a fused jumper wire from the battery voltage supply circuit terminal to the lumbar forward switch signal circuit terminal in the harness connector. Does the scan tool display the lumbar forward switch as Active? | Go to Step 18 | Go to Step 14 |
| 10 | Disconnect the lumbar switch connector. Connect a fused jumper wire from the battery voltage supply circuit terminal to the lumbar rearward switch signal circuit terminal in the harness connector. Does the scan tool display the lumbar rearward switch as Active? | Go to Step 18 | Go to Step 15 |
| 11 | Disconnect the lumbar switch connector. Connect a fused jumper wire from the battery voltage supply circuit terminal to the torso inward switch signal circuit terminal in the harness connector. Does the scan tool display the torso inward switch as Active? | Go to Step 18 | Go to Step 16 |
| 12 | Disconnect the lumbar switch connector. Connect a fused jumper wire from the battery voltage supply circuit terminal to the torso outward switch signal circuit terminal in the harness connector. Does the scan tool display the torso outward switch as Active? | Go to Step 18 | Go to Step 17 |
| 13 | Test the active lumbar or torso switch signal circuit 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 22 | Go to Step 19 |
| 14 | Test the lumbar forward switch signal circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 22 | Go to Step 19 |
| 15 | Test the lumbar rearward switch signal circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 22 | Go to Step 19 |
| 16 | Test the torso inward switch signal circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 22 | Go to Step 19 |
| 17 | Test the torso outward switch signal circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 22 | Go to Step 19 |
| 18 | Inspect for poor connections at the harness connector of the lumbar switch 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 22 | Go to Step 20 |
| 19 | Inspect for poor connections at the harness connector of the DSM. 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 22 | Go to Step 21 |
| 20 | Replace the lumbar switch assembly. Refer to Lumbar Switch Replacement . Did you complete the replacement? | Go to Step 22 | |
| 21 | Replace the DSM. Refer to Memory Seat Control Module Replacement . Did you complete the replacement? | Go to Step 22 | |
| 22 | Operate the system to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
Lumbar Support Inoperative (With Memory)
Lumbar Support Inoperative (w/o Memory)
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Driver Seat Schematics , Passenger Seat Schematics Connector End View Reference: Power Seat Systems Connector End Views | |||
| 1 | Did you review the Lumbar System Description and Operation and perform the necessary inspections? | Go to Step 2 | Go to Symptoms - Seats |
| 2 | Verify the condition is present. Does the system operate normally? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Disconnect the inoperative lumbar or torso motor connector. Connect a test lamp between the motor control circuit terminals in the harness connector. Operate the appropriate switch in both directions. Does the test lamp illuminate when the switch is operated in both directions? | Go to Step 6 | Go to Step 4 |
| 4 | Test the motor control circuits for an open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 9 | Go to Step 5 |
| 5 | Inspect for poor connections at 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 9 | Go to Step 7 |
| 6 | Inspect for poor connections at the inoperative lumbar or torso 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 9 | Go to Step 8 |
| 7 | Replace the lumbar switch. Refer to Lumbar Switch Replacement . | Go to Step 9 | |
| 8 | Replace the lumbar support/torso bolster motor assembly. Refer to Lumbar Replacement - Front Seat . Is the repair complete? | Go to Step 9 | |
| 9 | Operate the system to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
Lumbar Support Inoperative (w/o Memory)
Heated Seat Always On
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Driver Seat Schematics , Passenger Seat Schematics Connector End View Reference: Power Seat Systems Connector End Views | |||
| 1 | Did you perform the Power Seat Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Power Seat Systems |
| 2 | Operate the heated seat system. Does the system operate normally? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Install a scan tool. Display the Heated Seat Status parameter in the driver seat module (DSM) Input/Output data list. Start the engine. Does the scan tool display the Heated Seat Status parameter as Off? | Go to Step 6 | Go to Step 4 |
| 4 | Display the Heated Seat Mode parameter in the door module Inputs data list. Does the scan tool display the Heated Seat Mode parameter as Off? | Go to Step 6 | Go to Step 5 |
| 5 | Turn OFF the ignition. Disconnect the heated seat switch connector to the door module. Start the engine. Does the scan tool display the Heated Seat Mode parameter as Off? | Go to Step 7 | Go to Step 8 |
| 6 | Replace the DSM. Refer to Memory Seat Control Module Replacement . Is the repair complete? | Go to Step 9 | |
| 7 | Replace the heated seat switch. Refer to Heated Seat Switch Replacement - Front . Is the repair complete? | Go to Step 9 | |
| 8 | Replace the door module. Refer to Switch Replacement - Door Lock and Side Window - Driver or Switch Replacement - Door Lock and Side Window - Passenger in Doors. Is the repair complete? | Go to Step 9 | |
| 9 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
Heated Seat Always On
Heated Seat Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Driver Seat Schematics and Passenger Seat Schematics Connector End View Reference: Power Seat Systems Connector End Views | |||
| 1 | Did you perform the Power Seat Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Power Seat Systems |
| 2 | Operate the heated seat system. Does the system operate normally? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Install a scan tool. Start the engine. Display the Heated Seat Status and Zone parameters in the driver seat module Input/Output data list. Operate the heated seat switch in all modes. Does the scan tool display the correct heated seat parameters in relation to heated seat switch operation? | Go to Step 8 | Go to Step 4 |
| 4 | Display the heated seat switch parameters in the door module Inputs data list. Press the head seat switches while observing the scan tool parameters. Does the scan tool display the heated seat switches as active while the switches are pressed? | Go to Step 5 | Go to Step 6 |
| 5 | Do the heated seat switch indicators operate normally? | Go to Step 13 | Go to Step 12 |
| 6 | Disconnect the heated seat switch harness connector to the door module. Test the resistance through the heated seat switch from the voltage supply circuit terminal to the back only select switch signal circuit terminal while operating the heat level switch. Does the back only select switch have continuity only when pressed? | Go to Step 7 | Go to Step 10 |
| 7 | Test the resistance through the heated seat switch from the voltage supply circuit terminal to the back/cushion select switch signal circuit terminal while operating the back/cushion select switch. Does the back/cushion select switch have continuity only when pressed? | Go to Step 12 | Go to Step 10 |
| 8 | Disconnect the inoperative seat heater element connector. Connect a test lamp from the voltage supply circuit terminal to the control circuit terminal in the harness connector. Operate the seat back and cushion switch to the high mode. Does the test lamp illuminate? | Go to Step 11 | Go to Step 9 |
| 9 | Test the seat heater element voltage supply and ground circuits in the seat harness for an open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 18 | Go to Step 13 |
| 10 | Inspect for poor connections at the heated seat switch harness connector to the door 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 18 | Go to Step 14 |
| 11 | Inspect for poor connections at the heated seat element connector. 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 |
| 12 | Inspect for poor connections at the door 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 18 | Go to Step 16 |
| 13 | Inspect for poor connections at the driver 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 18 | Go to Step 17 |
| 14 | Replace the heated seat switch. Refer to Heated Seat Switch Replacement - Front . Is the repair complete? | Go to Step 18 | |
| 15 | Replace the inoperative heated seat element. Refer to Seat Back Heater Element Replacement - Front or Seat Cushion Heater Element Replacement - Front . Is the repair complete? | Go to Step 18 | |
| 16 | Replace the door module. Refer to Switch Replacement - Door Lock and Side Window - Driver or Switch Replacement - Door Lock and Side Window - Passenger in Doors. Is the repair complete? | Go to Step 18 | |
| 17 | Replace the driver seat module. Refer to Memory Seat Control Module Replacement . Is the repair complete? | Go to Step 18 | |
| 18 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
Heated Seat Inoperative
Seat - Manual Adjuster Does Not Unlock
| Problem | Action |
|---|---|
| The locking wire is too loose or is disconnected. | Tighten the locking wire enough to allow the locking bar to disengage from the lock slots in the adjuster lower channel when the lock control lever is activated. |
| The adjuster locking bar is sticking or binding. | Lubricate the locking bar pivot. Eliminate the cause of the binding. Replace the seat adjuster. Refer to Seat Adjuster Replacement - Front (Manual) or Seat Adjuster Replacement - Front (Power) . |
Seat - Manual Adjuster Does Not Unlock
Seat - Manual Adjuster Does Not Lock
| Problem | Action |
|---|---|
| The locking wire is too tight. | Loosen the locking wire tension enough to permit full engagement of the locking bar in the locking slots of the adjuster lower channel. |
| The adjuster locking bar spring is disconnected or broken. | Connect the locking bar spring. Install a new locking bar spring. |
| The adjuster locking bar is sticking or binding. | Lubricate the locking bar pivot. Eliminate the cause of the binding. Replace the seat adjuster. Refer to Seat Adjuster Replacement - Front (Manual) or Seat Adjuster Replacement - Front (Power) . |
Seat - Manual Adjuster Does Not Lock
Seat - Hard to Move Forward and Rearward
| Problem | Action |
|---|---|
| The adjusters are not properly lubricated. | Lubricate the channels with Lubriplate, or the equivalent. |
| The adjusters are binding because the channels are bent or damaged. | Replace the seat adjuster. |
| The adjusters are not in parallel alignment with each other. | Move one adjuster forward or rearward as necessary in order to align the adjusters. |
Seat - Hard to Move Forward and Rearward
Tools Required
J 34940 Rivet Gun. See Special Tools .
Lumbar Support/Torso Bolster System Components
The lumbar support/torso bolster system for the driver and passenger consists of the following components
- Driver and passenger lumbar support/torso bolster switches
- Driver and passenger lumbar support/torso bolster motor assemblies
- Driver seat module
- Memory select switch
- Driver door module
- SEAT 30A circuit breaker
Heated Seat Components
The heated seat system consists of the following components
- Driver and passenger heated seat switches
- Driver and passenger seat back heater elements
- Driver and passenger seat cushion heater elements
- Driver and passenger seat back temperature sensors
- Driver seat module
- Driver door module
- Passenger door module
The driver and passenger heated seats have 2 heat zone operating modes with 3 heat level modes and will operate only while the engine is running. The heat zones are determined by which of the 2 heated seat buttons are pressed, while the heat level is determined by the number of times they are pressed. Pressing the seat cushion button 1 time will activate the seat back and cushion heater elements in the high mode. Each time the seat cushion button is pressed the seat back and cushion heat level is reduced from high to medium, low, and off. Pressing the heated seat back button 1 time will activate only the seat back heater element in the high mode. Each time the seat back button is pressed the seat back heat level is reduced from high to medium, low, and off. During heated seat operation the heat zone operating mode may be changed without affecting the current heat level mode.
The heated seat switches are momentary contact switches and are inputs to the driver and passenger door modules. Battery voltage is supplied to the switch assembly from the door module, and when a heated seat switch is pressed and released a brief switch signal voltage is supplied to the door module. Whenever the door module receives an active heated seat switch input, the next heated seat operating mode is determined by whatever the current mode may be. The seat heater elements are controlled by the driver seat module using inputs from the door modules through Class 2 serial data circuit messages. The driver seat module controls the voltage supply and the ground circuits to the seat heater elements. When a heated seat function is commanded active, the seat module will switch battery voltage to the heater element supply circuits, and ground is provided through low side drive control circuits. During heated seat operation both the seat back and cushion heater elements are supplied battery voltage. The seat module grounds the appropriate control circuits for back only or back and cushion heating modes, and opens or closes the active control circuits as necessary in order to maintain the desired seat temperature. The seat module relies on inputs from thermistors located in the driver and passenger seat backs to control heated seat temperatures. The thermistors are 2 wire sensors supplied with a 5-volt referenced signal circuit and a low reference circuit from the seat module. Resistance through the thermistors varies with temperature causing the heated seat sensor signal circuit voltage levels to decrease as the seat back temperatures rise. The seat modules allow heated seat operation only while the engine is running which is determined by a Class 2 serial data circuit message from the powertrain control module.
The memory seat system consists of the following components
- Power seat switch assembly
- Memory recall switch assembly
- Horizontal adjuster motor
- Front vertical adjuster motor
- Rear vertical adjuster motor
- Recline adjuster motor
- Driver seat module
- Driver door module
- SEAT 30A circuit breaker
Battery voltage is supplied to the driver seat module through the power seat circuit breaker. The driver seat module supplies the seat adjuster switch assembly with a battery positive reference voltage. While the seat adjuster switches are in an inactive state the switch contacts are closed to the adjuster switch ground circuit. When a seat adjuster switch is pressed to an active state the switch contact is closed to the reference voltage circuit. Battery voltage on a switch signal circuit indicates to the driver seat module the switch status is active. Each seat adjuster motor is controlled by the driver seat module through 2 motor control circuits. While the seat adjuster motors are in an inactive state the motor control circuits are closed to ground circuit contacts within the driver seat module. The driver seat module operates the seat adjuster motors by switching one of a motor's control circuits to battery voltage. The seat adjuster motors are bidirectional and the direction of adjuster motor rotation is determined by which of the adjuster motor control circuits is switched to battery voltage while the other remains grounded.