Schematic Reference: Heated Seats Schematics

1

Did you perform the Diagnostic System Check - Power Seat Systems?

Go to Step  2

Go to Diagnostic System Check - Power Seat Systems

Verify that the Heated Seat Inoperative - Heated Back Mode 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

1. Install a scan tool.
2. Turn ON the ignition, with the engine OFF.
3. With a scan tool, observe the Heated Seat Mode parameter in the Door Module data list.
4. Activate the heated seat BACK ONLY switch.

Does the Heated Seat Mode parameter change state?

Go to Step  5

Go to Step  4

1. Probe the heated seat back only mode signal circuit of the heated seat switch with a test lamp that is connected to a good ground.
2. Activate the heated seat BACK ONLY switch.

Does the test lamp illuminate?

Go to Step 7

Go to Step  12

1. Disconnect the heated seat module harness connector C 1.
2. Connect a test lamp between the heated seat back only mode signal circuit of the heated seat module and the battery positive voltage (B+) circuit of the heated seat module.
3. Operate the heated seat BACK ONLY switch ON and OFF.

Does the test lamp turn ON and OFF with each command?

Go to Step  10

Go to Step 6

Does the test lamp remain illuminated with each command?

Go to Step  9

Go to Step  8

Test the heated seat back only mode 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 16

Go to Step 11

Test the heated seat back only mode signal circuit between the door control 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?

Go to Step 16

Go to Step 11

Test the heated seat back only mode signal circuit between the door control 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?

Go to Step 16

Go to Step 11

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 16

Go to Step 13

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 16

Go to Step 14

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 16

Go to Step 15

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?

Go to Step 16

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Replace the door module. Refer to Door Control Module Replacement in Doors.

Did you complete the replacement?

Go to Step 16

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Replace the heated seat switch. Refer to Front Seat Heater Switch Replacement or Rear Seat Heater Switch Replacement .

Did you complete the replacement?

Go to Step 16

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2