Step | Action | Values | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
Schematic Reference: Heated/Cooled Seat Schematics Connector End View Reference: Heated/Cooled Seat Connector End Views | ||||||||||
1 | Did you review the Heated Seat System Description and Operation and perform the necessary inspections? | -- | Go to Step 2 | |||||||
2 | Verify that the Heated Seat Inoperative complaint is present. Does the heated seat system operate as described in the system description and operation? | -- | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 | ||||||
3 |
Do the HI and LO temperature indicators illuminate? | -- | Go to Step 4 | Go to Step 17 | ||||||
4 |
Does the test lamp illuminate? | -- | Go to Step 11 | Go to Step 5 | ||||||
5 |
Does the test lamp illuminate? | -- | Go to Step 6 | Go to Step 24 | ||||||
6 | Connect a test lamp between the battery positive voltage circuit of the heated seat module connector and the ground circuit of the module connector. Does the test lamp illuminate? | -- | Go to Step 7 | Go to Step 25 | ||||||
7 |
Does the test lamp illuminate? | -- | Go to Step 8 | Go to Step 16 | ||||||
8 |
Dose the resistance measure near the specified value? | 2,500 ohms | Go to Step 9 | Go to Step 13 | ||||||
9 |
Dose the resistance measure near the specified value? | 200 ohms | Go to Step 10 | Go to Step 20 | ||||||
10 |
Important: If the resistance is measured with the seat still warm, the resistance may very outside of the specified range since the thermistor resistance varies with temperature. Measure the resistance between the temperature sensor signal circuit of the heated seat module connector and the ground circuit of the module connector. Does the resistance measure within the specified range? | 7,000-11,000 ohms | Go to Step 23 | Go to Step 14 | ||||||
11 |
Does the resistance measure less than the specified value? | 5 ohms | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 12 | ||||||
12 |
Does the resistance measure less than the specified value? | 5 ohms | Go to Step 19 | Go to Step 22 | ||||||
13 | Test the heated seat high/low signal circuit between the heated seat switch and the heated seat module for the following conditions:
Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 30 | Go to Step 20 | ||||||
14 | Test the ground circuit of the heated seat temperature sensor for an open. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 30 | Go to Step 15 | ||||||
15 | Test the signal circuit of the heated seat temperature sensor for the following conditions:
Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 30 | Go to Step 21 | ||||||
16 | Test the heated seat switch signal circuit between the heated seat switch and the heated seat module for a short to ground or an open. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 30 | Go to Step 20 | ||||||
17 | Test the battery positive voltage circuit of the heated seat switch for a short to ground or an open. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 30 | Go to Step 18 | ||||||
18 | Test the ground circuit heated seat switch for an open. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 30 | Go to Step 20 | ||||||
19 | Test the ground circuit of the seat heating elements for an open. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 30 | Go to Step 21 | ||||||
20 | 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 . Did you find and correct the condition? | -- | Go to Step 30 | Go to Step 26 | ||||||
21 | Inspect for poor connections at the harness connector of the heated seat cushion heating element/temperature sensor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | -- | Go to Step 30 | Go to Step 27 | ||||||
22 | Inspect for poor connections at the harness connector of the heated seat back heating element. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | -- | Go to Step 30 | Go to Step 28 | ||||||
23 | 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 . Did you find and correct the condition? | -- | Go to Step 30 | Go to Step 29 | ||||||
24 | Repair the open or short to ground in the battery positive voltage circuit of the heated seat module. Refer to Wiring Repairs or Connector Repairs . Did you complete the repair? | -- | Go to Step 30 | -- | ||||||
25 | Repair the open in the ground circuit of the heated seat module. Refer to Wiring Repairs or Connector Repairs . Did you complete the repair? | -- | Go to Step 30 | -- | ||||||
26 | Replace the heated seat switch. Refer to Heated Seat Switch Replacement . Is the repair complete? | -- | Go to Step 30 | -- | ||||||
27 | Replace the seat cushion heater element/temperature sensor. Refer to Driver or Passenger Seat Cushion Heater Replacement . Is the repair complete? | -- | Go to Step 30 | -- | ||||||
28 | Replace the seat back heater element. Refer to Driver or Passenger Seat Back Cushion Heater Replacement . Is the repair complete? | -- | Go to Step 30 | -- | ||||||
29 | Replace the heated seat control module. Refer to Control Module References for replacement, setup, and programming. Is the repair complete? | -- | Go to Step 30 | -- | ||||||
30 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 | ||||||
