Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
SCHEMATIC REFERENCE: Heated Seats Schematics | ||||
1 | Did you perform the Diagnostic System Check - Power Seat Systems? | -- | ||
2 |
Does only the seat back or the seat cushion of the malfunctioning seat get warm? | -- | ||
3 |
Does the Heated Seat Temperature parameter change state? | -- | ||
4 | Measure the voltage from the heated seat switch (B+) circuit of the heated seat switch to a good ground. Does the voltage measure within the specified range? | 9-16 V | ||
5 |
Does the test lamp illuminate? | -- | ||
6 | Measure the voltage from the battery positive voltage (B+) circuit of the heated seat module connector to a good ground. Does the voltage measure within the specified range? | 9-16 V | ||
7 | Measure the voltage from 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? | 9-16 V | ||
8 | Measure the voltage from the Ignition 3 circuit of the heated seat module connector to a good ground. Does the voltage measure within the specified range? | 9-16 V | ||
9 |
Does the test lamp turn ON and OFF with each command? | -- | ||
10 | Does the test lamp remain illuminated with each command? | -- | ||
11 |
Does the resistance measure less than the specified value? | 6 ohms | ||
12 | Measure the resistance between the temperature sensor input circuit and the sensor return circuit of the suspect heated seat cushion or seat back. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Important: If the resistance is measured with the seat still warm, the resistance may vary within the specified range depending on the temperature of the seat. Does the resistance measure within the specified range? | 280 ohms - 300 K ohms | ||
13 | Test the heater control circuit and the controlled ground circuit between the heated seat module and the seat heating elements for a short to ground, a high resistance, or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | ||
14 | Test the temperature sensor signal circuit and the sensor return circuit between the heated seat module and the heating element for a short to ground, a high resistance, or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | ||
15 | Test the heated seat switch (B+) circuit between the door control module and the heated seat switch for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | ||
16 | Test the temperature input circuit between the door module and the heated seat module for a short to voltage or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | ||
17 | Test the temperature input circuit between the door module and the heated seat module for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | ||
18 | Test the heated seat temperature input circuit between the heated seat switch and the door control module for a short to ground or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | ||
19 | Inspect for poor connections at the harness connector of 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? | -- | ||
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? | -- | ||
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? | -- | ||
22 | Inspect for poor connections at the harness connector of the suspect heated seat cushion or seat back heating element/sensor assembly. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | ||
23 | Repair the open in the ground circuit of the heated seat module. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | -- | |
24 | Repair the open or short to ground in the battery positive voltage (B+) circuit of the heated seat module. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | -- | |
25 | Repair the open or short to ground in the Ignition 3 circuit of the heated seat module. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | -- | |
26 | Replace the door module. Refer to Door Control Module Replacement in Doors. Did you complete the replacement? | -- | -- | |
27 | Replace the heated seat switch. Refer to Front Seat Heater Switch Replacement or Rear Seat Heater Switch Replacement . Did you complete the replacement? | -- | -- | |
28 | Replace the heated seat module. Refer to Front Seat Heater Control Module Replacement or Rear Seat Heater Control Module Replacement . Did you complete the replacement? | -- | -- | |
29 | Replace the appropriate heated seat cushion or seat back heater/sensor assembly. Refer to one of the following procedures: Did you complete the replacement? | -- | -- | |
30 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | |
