Test Description
The numbers below refer to the step numbers on the diagnostic table.
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This step tests the integrity of the heated seat switch signal circuit of the driver door module. If the fuse in the jumper wire opens when you perform this test, the signal circuit is shorted to battery voltage.
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This step tests the integrity of the ground circuit of the heated seat switch.
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This step tests the integrity of the ground circuit of the heated seat module.
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This step tests the integrity of the heated seat High/Low signal from the rear integration module. This signal is a momentary 35 millisecond one shot pulse signal that is monitored through a momentary voltage change in the volt meter when the switch is pressed. In order to accurately recognize the change in voltage, the volt meter should stable before performing this test.
Step | Action | Values | Yes | No |
|---|---|---|---|---|
Schematic Reference: Driver Seat Schematics or Passenger Seat Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems DEFINITION: This test assumes that load shed level 1 or 2 heated seats is not enabled. | ||||
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 as described in the system description and operation? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 |
Does the Heated Seat Switch parameter change state? | -- | Go to Step 6 | Go to Step 4 |
Does the Heated Seat Switch parameter change state? | -- | Go to Step 5 | Go to Step 14 | |
Does the Heated Seat Switch parameter change state? | -- | Go to Step 19 | Go to Step 25 | |
6 |
Does the voltage measure within the specified range? | 9-16 V | Go to Step 7 | Go to Step 26 |
Measure the voltage from the battery positive voltage circuit of the heated seat module connector to the ground circuit of the heated seat module connector. Does the voltage measure within the specified range? | 9-16 V | Go to Step 8 | Go to Step 28 | |
8 |
Does the voltage measure within the specified range? | 9-16 V | Go to Step 9 | Go to Step 27 |
9 |
Does the voltage measure within the specified range? | 4.50-5.50 V | Go to Step 10 | Go to Step 15 |
While measuring the voltage from the heated seat high/low signal circuit of the heated seat module, press the heated seat switch. Does the measured voltage change state? | -- | Go to Step 11 | Go to Step 16 | |
11 |
Does the resistance measure less than the specified value? | 5 ohms | Go to Step 13 | Go to Step 12 |
12 |
Does the resistance measure less than the specified value? | 5 ohms | Go to Step 22 | Go to Step 21 |
13 |
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. Measure the resistance between the temperature sensor signal circuit and the sensor low reference circuit of the temperature sensor connector. Does the resistance measure within the specified range? | 280 ohms -300 K ohms | Go to Step 17 | Go to Step 22 |
14 | Test the heated seat switch signal circuit between the heated seat switch and the door control module for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 35 | Go to Step 23 |
15 | Test the heated seat high/low signal circuit between the rear integration module and the heated seat module for a short to battery positive voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 35 | Go to Step 20 |
16 | Test the heated seat high/low signal circuit between the rear integration module and the heated seat module for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 35 | Go to Step 24 |
17 | Test the element control ground circuit of the heating elements 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 35 | Go to Step 18 |
18 | Test the temperature sensor signal circuit of the temperature sensor 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 35 | Go to Step 20 |
19 | 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 35 | Go to Step 29 |
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 35 | Go to Step 30 |
21 | 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 in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 35 | Go to Step 31 |
22 | 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 in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 35 | Go to Step 32 |
23 | Inspect for poor connections at the harness connector of the door control 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 35 | Go to Step 33 |
24 | Inspect for poor connections at the harness connector of the rear integration 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 35 | Go to Step 34 |
25 | Repair the open in the ground circuit of the heated seat switch. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 35 | -- |
26 | 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 35 | -- |
27 | 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 35 | -- |
28 | 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 35 | -- |
29 | Replace the heated seat switch. Refer to Heated Seat Switch Replacement . Did you complete the replacement? | -- | Go to Step 35 | -- |
30 | Replace the heated seat module. Refer to Control Module References in Computer/integrating Systems for replacement, setup, and programming. Did you complete the replacement? | -- | Go to Step 35 | -- |
31 | Replace the heated seat back heating element. Refer to Front Seat Heater Element Replacement . Did you complete the replacement? | -- | Go to Step 35 | -- |
32 | Replace the heated seat cushion heating element/temperature sensor. Refer to Front Seat Heater Element Replacement . Did you complete the replacement? | -- | Go to Step 35 | -- |
33 | Replace the door control module. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | -- | Go to Step 35 | -- |
34 | Replace the rear integration module. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | -- | Go to Step 35 | -- |
35 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 |
