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 perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
2 | Verify that the Heated Seat Inoperative complaint is present. Does the Heated Seat System operate normally? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 |
Does the voltage measure within the specified range? | 10-15 V | Go to Step 4 | Go to Step 25 |
4 | Measure the voltage from the battery positive voltage circuit of the heated seat module to the ground circuit of the heated seat module. Does the voltage measure within the specified range? | 10-15 V | Go to Step 5 | Go to Step 27 |
5 |
Does the voltage measure within the specified range? | 10-15 V | Go to Step 6 | Go to Step 26 |
6 | Measure the resistance from the inhibit signal circuit of the heated seat module connector to ground. Does the resistance measure less than the specified value? | 10 ohms | Go to Step 13 | Go to Step 7 |
7 |
Does the resistance measure less than the specified value? | 60 ohms | Go to Step 18 | Go to Step 8 |
8 |
Does the resistance measure less than the specified value? | 60 ohms | Go to Step 10 | Go to Step 9 |
9 |
Does the resistance measure less than the specified value? | 5 ohms | Go to Step 28 | Go to Step 17 |
10 |
Does the resistance measure less than the specified value? | 10 ohms | Go to Step 11 | Go to Step 23 |
11 |
Does the resistance measure less than the specified value? | 10 ohms | Go to Step 12 | Go to Step 22 |
12 |
Important: The thermistor resistance varies according to the temperature. Therefore, if you measure the resistance while the seat is still warm, the resistance may vary outside of the specified range. With the seat at room temperature, measure the resistance between the temperature sensor signal circuit and the low reference circuit of the heated seat cushion connector. Does the resistance measure within the specified range? | 850-1,150 ohms | Go to Step 14 | Go to Step 22 |
13 |
Did you find and correct the condition? | -- | Go to Step 34 | Go to Step 24 |
14 | Test the heated seat element control circuit of the seat back heating element for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 34 | Go to Step 15 |
15 | Test the heated seat element control circuit of the seat cushion heating element for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 34 | Go to Step 16 |
16 | Test the temperature sensor signal circuit of the temperature sensor for short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 34 | Go to Step 20 |
17 | Test the ground circuit of the heated seat switch for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 34 | Go to Step 19 |
18 | Test the heated seat high/low signal circuit between the heated seat module and the heated seat switch for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 34 | Go to Step 21 |
19 | Test the heated seat high/low signal circuit between the heated seat module and the heated seat switch for a short battery voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 34 | Go to Step 21 |
20 | Inspect for poor connections at the harness connector of the heated 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 34 | Go to Step 32 |
21 | Inspect for poor connections at the harness connector of the heated seat 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 34 | Go to Step 33 |
22 | Inspect for poor connections at the harness connector of the seat cushion heating element/temperature sensor. 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 34 | Go to Step 30 |
23 | Inspect for poor connections at the harness connector of the seat back heating element. 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 34 | Go to Step 29 |
24 | Inspect for poor connections at the harness connector of the BCM. 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 34 | Go to Step 31 |
25 | Repair the short to ground or open in the battery positive voltage circuit of the heated seat module. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 34 | -- |
26 | Repair the open in the ignition 3 voltage circuit of the heated seat module. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 34 | -- |
27 | Repair the open in the ground circuit of the heated seat module. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 34 | -- |
28 | Repair the open in the high/low signal circuit of the heated seat module. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 34 | -- |
29 | Replace the seat back heating element. Refer to Driver Seat and Passenger Seat Back Cushion Heater Replacement . Did you complete the replacement? | -- | Go to Step 34 | -- |
30 | Replace the seat cushion heating element/temperature sensor. Refer to Driver Seat and Passenger Seat Cushion Heater Replacement . Did you complete the replacement? | -- | Go to Step 34 | -- |
31 | Replace the BCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | -- | Go to Step 34 | -- |
32 | Replace the heated seat module. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the repair? | -- | Go to Step 34 | -- |
33 | Replace the heated seat switch. Refer to Heated Seat Switch Replacement . Did you complete the replacement? | -- | Go to Step 34 | -- |
34 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 |
