Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you review the power seat operation and perform the necessary inspections? | -- | Go to Step 2 | Go to Symptoms |
2 |
Does the voltage measure within the specified range? | 10-15 V | Go to Step 3 | Go to Step 20 |
3 | Measure the voltage of the Battery Positive Voltage (B+) 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 4 | Go to Step 22 |
4 |
Does the voltage measure within the specified range? | 10-15 V | Go to Step 5 | Go to Step 21 |
5 |
Does the resistance measure less than the specified value? | 5 ohms | Go to Step 6 | Go to Step 7 |
6 |
Does the resistance measure less than the specified value? | 5 ohms | Go to Step 29 | Go to Step 30 |
7 |
Does the resistance measure less than the specified value? | 5 ohms | Go to Step 12 | Go to Step 8 |
8 |
Does the resistance measure greater than the specified value? | 5 ohms | Go to Step 32 | Go to Step 9 |
9 |
Does the resistance measure less than the specified value? | 5 ohms | Go to Step 33 | Go to Step 10 |
10 | 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 11 |
11 | Replace the suspect heated seat switch. Did you complete the replacement? | -- | Go to Step 34 | -- |
12 |
Does the resistance measure less than the specified value? | 10 ohms | Go to Step 13 | Go to Step 23 |
13 | Test the resistance of the seat cushion heating element to ground. Does the resistance measure less than the specified value? | 5 ohms | Go to Step 25 | Go to Step 14 |
14 |
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, Test the resistance between the Temperature Sensor Signal circuit and the Sensor Return circuit of the heated seat cushion. Does the resistance measure within the specified value? | 850-1150 ohms | Go to Step 15 | Go to Step 23 |
15 | Test the resistance between the Temperature Sensor Signal circuit to ground. Is the resistance less than the specified value? | 5 ohms | Go to Step 25 | Go to Step 16 |
16 | Test the resistance of the seat back heating element. Does the resistance measure less than the specified value? | 10 ohms | Go to Step 17 | Go to Step 26 |
17 | Test the resistance of the seat back heating element to ground. Refer to Circuit Testing in Wiring Systems. Does the resistance measure less than the specified value? | 5 ohms | Go to Step 28 | Go to Step 18 |
18 | 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 19 |
19 | Replace the heated seat module. Refer to Heater Module Replacement . Did you complete the repair? | -- | Go to Step 34 | -- |
20 | Repair the open in the Battery Positive Voltage (B+) circuit between the I/P fuse block and the heated seat module. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 34 | -- |
21 | Repair the open or short to ground in the Ignition Positive Voltage circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 34 | -- |
22 | Repair the ground circuit of the heated seat module. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 34 | -- |
23 | Inspect for poor connections at the harness connector of the seat cushion 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 24 |
24 | Replace the seat cushion heating element. Refer to Front Seat Heater Element Replacement . Did you complete the replacement? | -- | Go to Step 34 | -- |
25 | Repair the seat cushion heating element circuit for a short to ground. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 34 | -- |
26 | 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 27 |
27 | Replace the seat back heating element. Refer to Front Seat Heater Element Replacement . Did you complete the replacement? | -- | Go to Step 34 | -- |
28 | Repair the short to ground in the seat back heating element circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 34 | -- |
29 | Repair the short to ground in the Inhibit Control Circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 34 | -- |
30 | Inspect for poor connections at the harness connector of the Body Control Module (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 |
31 | Replace the Body Control Module (BCM). Refer to Body Control Module Replacement in Body Control Systems. Did you complete the replacement? | -- | Go to Step 34 | -- |
32 | Repair the open in the heated seat switch signal circuit between the heated seat switch and the heated seat module. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 34 | -- |
33 | Repair the open in the heated seat switch ground circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | 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 |
