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 | |||
| 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 operate all of the seat adjuster motors through their full range of adjustment. Do all of the seat adjuster motors 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 Inputs/Outputs data list. 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 5 | Go to Step 4 |
| 4 | 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 |
| 5 | Disconnect the driver seat module connector C1. Connect a test lamp from the high current battery voltage supply circuit terminal in the harness connector to ground. Does the test lamp illuminate? | Go to Step 9 | Go to Step 7 |
| 6 | Test the battery voltage supply circuit to the seat adjuster switch for open or short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 9 |
| 7 | Repair the high current battery voltage supply circuit to the driver seat module for open or short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Is the repair complete? | Go to Step 12 | |
| 8 | Inspect for poor connections at the harness connector of the seat adjuster switch connector. Refer to Testing for Intermittent Conditions and Poor Connections and to 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 connectors of the driver seat module. Refer to Testing for Intermittent Conditions and Poor Connections and to 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 driver seat module. 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 2 |
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: One or more of the power seat functions are inoperative. | |||
| 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 | Attempt to operate all of the power seat adjuster motors through their full range of adjustment. Do all of the power seat adjuster motors operate normally? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Are all the power seat adjuster motors inoperative? | Go to Step 4 | Go to Step 6 |
| 4 | 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 5 | Go to Step 8 |
| 5 | 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 10 | Go to Step 9 |
| 6 | Disconnect the inoperative adjuster motor connector. Connect a test lamp across the motor control circuit terminals in the harness connector. Operate the appropriate adjuster switch in both directions. Does the test lamp illuminate while the switch is operated in both directions? | Go to Step 11 | Go to Step 7 |
| 7 | Disconnect the seat adjuster switch connector. Test the inoperative 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 14 | Go to Step 10 |
| 8 | Repair the battery voltage supply circuit to the seat adjuster switch for an open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Is the repair complete? | Go to Step 14 | |
| 9 | Repair the seat adjuster switch ground circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Is the repair complete? | Go to Step 14 | |
| 10 | 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 14 | Go to Step 12 |
| 11 | Inspect for poor connections at the inoperative 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 14 | Go to Step 13 |
| 12 | Replace the seat adjuster switch. Refer to Seat Switch Replacement - Power . Is the repair complete? | Go to Step 14 | |
| 13 | Replace the inoperative seat adjuster motor. Refer to Seat Adjuster Mechanism Replacement - Power . Is the repair complete? | Go to Step 14 | |
| 14 | Operate the system in order 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
| 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 | Operate the horizontal adjuster switch in the forward and rearward directions. Does the horizontal adjuster motor 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 position switch parameter in the driver seat module Inputs/Outputs data list. Operate the horizontal adjuster switch in the forward direction. Does the scan tool display the correct switch status parameter in relation to the actual switch position? | Go to Step 4 | Go to Step 5 |
| 4 | Operate the horizontal adjuster switch in the rearward direction. Does the scan tool display the correct switch status parameter in relation to the actual switch position? | Go to Step 7 | Go to Step 6 |
| 5 | Disconnect the seat adjuster switch connector. Connect a 3-amp fused jumper wire between the battery voltage supply circuit terminal and the horizontal forward switch signal circuit terminal in the harness connector. Observe the horizontal position switch parameter in the driver seat module Inputs/Outputs data list. Does the scan tool display the horizontal switch status parameter as forward? | Go to Step 12 | Go to Step 8 |
| 6 | Disconnect the seat adjuster switch connector. Connect a 3-amp fused jumper wire between the battery voltage supply circuit terminal and the horizontal rearward switch signal circuit terminal in the harness connector. Observe the horizontal position switch parameter in the driver seat module Inputs/Outputs data list. Does the scan tool display the horizontal switch status parameter as rearward? | Go to Step 12 | Go to Step 9 |
| 7 | Disconnect the horizontal adjuster motor control circuit connector. Connect a test lamp between the control circuit terminals in the harness connector. Operate the horizontal adjuster switch in both directions. Does the test lamp illuminate in the forward and backward switch positions only? | Go to Step 11 | Go to Step 10 |
| 8 | Test the horizontal forward switch signal circuit for an open or short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 17 | Go to Step 13 |
| 9 | Test the horizontal rearward switch signal circuit for an open or short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 17 | Go to Step 13 |
| 10 | Test the horizontal adjuster motor control circuits for an open or short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 17 | Go to Step 13 |
| 11 | Inspect for poor connections at the horizontal adjuster motor. Refer to Testing for Intermittent Conditions and Poor Connections and to 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 seat adjuster switch. Refer to Testing for Intermittent Conditions and Poor Connections and to 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 driver seat module. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 17 | Go to Step 16 |
| 14 | Replace the horizontal adjuster motor. Refer to Seat Adjuster Mechanism Replacement - Power . Is the repair complete? | Go to Step 17 | |
| 15 | Replace the seat adjuster switch. Refer to Seat Switch Replacement - Power . Is the repair complete? | Go to Step 17 | |
| 16 | Replace the driver seat module. Refer to Memory Seat Control Module Replacement . Is the repair complete? | Go to Step 17 | |
| 17 | Operate the system to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Power Seat Does Not Move Forward/Rearward
Power Seat Does Not Tilt Forward
| 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 | Operate the front vertical adjuster switch in the upward and downward directions. Does the front vertical adjuster motor 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 position switch parameter in the driver seat module Inputs/Outputs data list. Operate the front vertical adjuster switch in the upward direction. Does the scan tool display the correct switch status parameter in relation to the actual switch position? | Go to Step 4 | Go to Step 5 |
| 4 | Operate the front vertical adjuster switch in the downward direction. Does the scan tool display the correct switch status parameter in relation to the actual switch position? | Go to Step 7 | Go to Step 6 |
| 5 | Disconnect the seat adjuster switch connector. Connect a 3-amp fused jumper wire between the battery voltage supply circuit terminal and the front vertical upward switch signal circuit terminal in the harness connector. Observe the front vertical position switch parameter in the driver seat module Inputs/Outputs data list. Does the scan tool display the front vertical position switch parameter as upward? | Go to Step 12 | Go to Step 8 |
| 6 | Disconnect the seat adjuster switch connector. Connect a 3-amp fused jumper wire between the battery voltage supply circuit terminal and the front vertical downward switch signal circuit terminal in the harness connector. Observe the front vertical position switch parameter in the driver seat module Inputs/Outputs data list. Does the scan tool display the front vertical position switch parameter as downward? | Go to Step 12 | Go to Step 9 |
| 7 | Disconnect the front vertical adjuster motor control circuit connector. Connect a test lamp between the control circuit terminals in the harness connector. Operate the front vertical adjuster switch in both directions. Does the test lamp illuminate in the upward and downward switch positions only? | Go to Step 11 | Go to Step 10 |
| 8 | Test the front vertical upward switch signal circuit for an open or short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 17 | Go to Step 13 |
| 9 | Test the front vertical downward switch signal circuit for open or short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 17 | Go to Step 13 |
| 10 | Test the front vertical adjuster motor control circuits for an open or short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 17 | Go to Step 13 |
| 11 | Inspect for poor connections at the front vertical adjuster motor. Refer to Testing for Intermittent Conditions and Poor Connections and to 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 seat adjuster switch. Refer to Testing for Intermittent Conditions and Poor Connections and to 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 driver seat module. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 17 | Go to Step 16 |
| 14 | Replace the front vertical adjuster motor. Refer to Seat Adjuster Mechanism Replacement - Power . Is the repair complete? | Go to Step 17 | |
| 15 | Replace the seat adjuster switch Refer to Seat Switch Replacement - Power . Is the repair complete? | Go to Step 17 | |
| 16 | Replace the driver seat module. Refer to Memory Seat Control Module Replacement . Is the repair complete? | Go to Step 17 | |
| 17 | Operate the system to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Power Seat Does Not Tilt Forward
Power Seat Does Not Tilt Rearward
| 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 | Operate the rear vertical adjuster switch in the upward and downward directions. Does the rear vertical adjuster motor 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 position switch parameter in the driver seat module Inputs/Outputs data list. Operate the rear vertical adjuster switch in the upward direction. Does the scan tool display the correct switch status parameter in relation to the actual switch position? | Go to Step 4 | Go to Step 5 |
| 4 | Operate the rear vertical adjuster switch in the downward direction. Does the scan tool display the correct switch status parameter in relation to the actual switch position? | Go to Step 7 | Go to Step 6 |
| 5 | Disconnect the seat adjuster switch connector. Connect a 3-amp fused jumper wire between the battery voltage supply circuit terminal and rear vertical upward switch signal circuit terminal in the harness connector. Observe the rear vertical position switch parameter in the driver seat module Inputs/Outputs data list. Does the scan tool display the rear vertical position switch parameter as upward? | Go to Step 12 | Go to Step 8 |
| 6 | Disconnect the seat adjuster switch connector. Connect a 3-amp fused jumper wire between the battery voltage supply circuit terminal and rear vertical downward switch signal circuit terminal in the harness connector. Observe the rear vertical position switch parameter in the driver seat module Inputs/Outputs data list. Does the scan tool display the rear vertical position switch parameter as downward? | Go to Step 12 | Go to Step 9 |
| 7 | Disconnect the rear vertical adjuster motor control circuit connector. Connect a test lamp between the control circuit terminals in the harness connector. Operate the rear vertical adjuster switch in both directions. Does the test lamp illuminate in the upward and downward switch positions only? | Go to Step 11 | Go to Step 10 |
| 8 | Test the rear vertical upward switch signal circuit for an open or short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 17 | Go to Step 13 |
| 9 | Test the rear vertical downward switch signal circuit for an open or short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 17 | Go to Step 13 |
| 10 | Test the rear vertical adjuster motor control circuits for an open or short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 17 | Go to Step 13 |
| 11 | Inspect the poor connections at the rear vertical adjuster motor. Refer to Testing for Intermittent Conditions and Poor Connections and to 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 seat adjuster switch. Refer to Testing for Intermittent Conditions and Poor Connections and to 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 driver seat module. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 17 | Go to Step 16 |
| 14 | Replace the rear vertical adjuster motor. Refer to Seat Adjuster Mechanism Replacement - Power . Is the repair complete? | Go to Step 17 | |
| 15 | Replace the seat adjuster switch. Refer to Seat Switch Replacement - Power . Is the repair complete? | Go to Step 17 | |
| 16 | Replace the driver seat module. Refer to Memory Seat Control Module Replacement . Is the repair complete? | Go to Step 17 | |
| 17 | Operate the system to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
Power Seat Does Not Tilt Rearward
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 of 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, and memory 2, 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 | Disconnect the driver seat module connector C2. Using a DMM test the resistance through the memory switch from the voltage supply circuit terminal to the memory 1 switch signal circuit terminal in the harness connector. Refer to Circuit Testing 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 4 | Go to Step 6 |
| 4 | Using a DMM test the resistance through the memory switch from the voltage supply circuit terminal to the memory 2 switch signal circuit terminal in the driver seat module harness connector. Refer to Circuit Testing 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 5 | Go to Step 6 |
| 5 | Using a DMM test the resistance through the memory switch from the voltage supply circuit terminal to the memory set switch signal circuit terminal in the driver seat module harness connector. Refer to Circuit Testing in Wiring Systems. Press the SET switch. Is the resistance less than the specified value only while the switch is pressed? | 0.5 ohms | Go to Step 8 | Go to Step 6 |
| 6 | Test the affected memory switch signal circuit for the following conditions: Short to ground Short to voltage Open Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 7 | |
| 7 | Inspect for poor connections at the memory switch connector. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 9 | |
| 8 | Inspect for poor connections at the driver seat module. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 10 | |
| 9 | Replace the memory switch. Refer to Seat Switch Replacement - Power . Did you complete the replacement? | Go to Step 11 | ||
| 10 | Replace the driver seat module. Refer to Memory Seat Control Module Replacement . Did you complete the replacement? | Go to Step 11 | ||
| 11 | Operate the memory seat system to verify the repair. Did you correct the condition? | System OK | Go to Step 2 | |
Memory Seat Feature Inoperative
Lumbar Support Inoperative
| 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 | Operate the lumbar switch in both directions. 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 Switch parameter in the driver seat module Input/Output data list. Operate the lumbar switch in both directions. Does the scan tool display the correct switch parameter in relation to the actual switch position? | Go to Step 6 | Go to Step 4 |
| 4 | Disconnect the lumbar switch connector. Connect a test lamp from the switch power supply circuit terminal in the harness connector to ground. Does the test lamp illuminate? | Go to Step 5 | Go to Step 7 |
| 5 | Observe the Lumbar Switch parameter in the driver seat module Input/Output data list. Connect a 3-amp fused jumper wire from the switch power supply circuit terminal to the inoperative switch signal circuit terminal in the lumbar switch harness connector. Does the scan tool indicate the correct switch signal circuit is active? | Go to Step 10 | Go to Step 8 |
| 6 | Disconnect the lumbar adjuster motor connector. Connect a test lamp between the adjuster motor control circuit terminals in the harness connector. Operate the lumbar switch in both directions. Does the test lamp illuminate while the switch is pressed in both directions? | Go to Step 11 | Go to Step 9 |
| 7 | Test the switch power supply circuit to the lumbar switch for an open or short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 16 | Go to Step 12 |
| 8 | Test the inoperative lumbar switch signal circuit for an open or short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 16 | Go to Step 12 |
| 9 | Test the lumbar adjuster motor control circuits for an open or short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 16 | Go to Step 12 |
| 10 | Inspect for poor connections at the harness connector of the lumbar switch. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 16 | Go to Step 13 |
| 11 | Inspect for poor connections at the harness connector of the lumbar adjuster motor. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 16 | Go to Step 14 |
| 12 | Inspect for poor connections at the harness connector of the driver seat module. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 16 | Go to Step 15 |
| 13 | Replace the lumbar switch. Refer to Seat Switch Replacement - Power . Did you complete the replacement? | Go to Step 16 | |
| 14 | Replace the lumbar adjuster motor. Refer to Lumbar Replacement - Front Seat . Did you complete the replacement? | Go to Step 16 | |
| 15 | Replace the driver seat module. Refer to Memory Seat Control Module Replacement . Did you complete the replacement? | Go to Step 16 | |
| 16 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
Lumbar Support Inoperative
Heated Seat Inoperative
| Step | Action | Values | 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 | Start the engine. Attempt to operate the heated seat in the high and low modes. 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 appropriate Heated Seat Sw. parameter in the seat module Input/Output data list. Start the engine. Operate the heated seat switch in the high and low modes. Does the scan tool display On while the switch is in the high and low positions? | Go to Step 4 | Go to Step 5 | |
| 4 | Observe the Seat Heat Sensor parameter in the seat module Sensor Data list. Start the engine. Operate the heated seat switch in the high mode. Is the Seat Heat Sensor parameter greater than the specified value? | 1 V | Go to Step 7 | Go to Step 6 |
| 5 | Disconnect the heated seat switch connector. Using a DMM measure the voltage at the 5-volt switch supply circuit terminal in the harness connector. Is the voltage at or near the specified value? | 5 V | Go to Step 10 | Go to Step 9 |
| 6 | Disconnect the heated seat cushion 4-way connector. Using a DMM measure the resistance through the heat sensor. Is the resistance within the specified values? | 3K-11K ohms | Go to Step 11 | Go to Step 15 |
| 7 | Disconnect the heated seat cushion 4-way connector. Using a DMM measure the resistance through the seat heater elements. Is the resistance within the specified values? | 2-4 ohms | Go to Step 12 | Go to Step 8 |
| 8 | Disconnect the seat back heater element 2-way connector. Using a DMM measure the resistance through the seat back heater element. Is the resistance within the specified values? | 1-2 ohms | Go to Step 15 | Go to Step 16 |
| 9 | Test the 5-volt supply circuit to the heated seat switch for an open or short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 21 | Go to Step 14 | |
| 10 | Test the heated seat switch high/low signal circuit for an open or short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 21 | Go to Step 13 | |
| 11 | Test the seat heat sensor low reference circuit for an open or high resistance. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 21 | Go to Step 14 | |
| 12 | Test the seat heater element voltage supply and control circuits in the seat harness for an open or short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 21 | Go to Step 14 | |
| 13 | Inspect for poor connections at the harness connector of the heated seat switch. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 21 | Go to Step 17 | |
| 14 | Inspect for poor connections at the harness connector of the seat module. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 21 | Go to Step 18 | |
| 15 | Inspect for poor connections at the harness connector of the seat cushion heater element. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 21 | Go to Step 19 | |
| 16 | Inspect for poor connections at the harness connector of the seat back heater element. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 21 | Go to Step 20 | |
| 17 | Replace the heated seat switch. Refer to Heated Seat Switch Replacement - Front . Is the repair complete? | Go to Step 21 | ||
| 18 | Replace the driver seat module. Refer to Memory Seat Control Module Replacement . Is the repair complete? | Go to Step 21 | ||
| 19 | Replace the seat cushion heater element. Refer to Seat Cushion Heater Element Replacement - Front . Is the repair complete? | Go to Step 21 | ||
| 20 | Replace the seat back heater element. Refer to Seat Back Heater Element Replacement - Front . Is the repair complete? | Go to Step 21 | ||
| 21 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 | |
Heated Seat Inoperative
Power Seats Without Memory
Battery voltage is supplied to the power seat switch through the power seat circuit breaker. While the seat adjuster switches are in an inactive state the switch contacts are closed to the power seat switch ground circuit. When a power seat switch is pressed to an active state the switch contact is closed to the battery voltage supply circuit. Each seat adjuster motor is controlled by the power seat switch through 2 motor control circuits. 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.
Lumbar Support System Components
The lumbar support system for the driver and passenger seat consists of the following components
- Lumbar switch
- Seat lumbar motor assembly
- Driver seat module
- Seat circuit breaker
Heated Seats System Components
The heated seats system for the driver and passenger seats consists of the following components
- Driver and passenger heated seat switches
- Driver and passenger seat back heater elements
- Driver and passenger seat heat sensors
- Driver and passenger seat cushion heater elements
- Driver seat module