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For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2000 🢒 Seville 🢒 DTC 🢒 DTC B3793 Memory Seat Module Over Current

SCHEMATIC REFERENCE: Memory Seats Schematics

Circuit Description

The current drawn from the battery supply to the memory seat module (MSM) is monitored by the MSM. When excessive current is detected, the MSM disables the seat motors in order to protect the internal MSM circuitry.

Conditions for Running the DTC

The MSM tests for excessive current only when the seat motors are active.

Conditions for Setting the DTC

The MSM will set DTC B3793 when the measured battery current exceeds 81 amps for 100 milliseconds.

Action Taken When the DTC Sets

All MSM seat motors are disabled and memory recalles in progress are aborted.

Conditions for Clearing the DTC

The current status of the DTC is cleared when the DTC runs and does not detect excessive current.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. This test determines which directional motor exhibits excessive current.

    2.

  2. This test determines if the suspect motor has an internal short to ground.

    3.

  3. This test verifies the repair.

Step

Action

Value(s)

Yes

No

1

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

--

Go to Step  2

Go to Diagnostic System Check - Power Seat Systems

2

  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, observe the Current parameter in the Memory Seat Module data list.
  4. Activate the seat switch in both directions for each directional motor.

Does the Current parameter display greater than the specified value for any of the seat motors?

81 amps

Go to Step  3

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

3

  1. Disconnect the suspect motor harness connector.
  2. Activate the suspect motor switch in both directions.
  3. With a scan tool, observe the Current parameter.

Does the Current parameter display greater than the specified value?

81 amps

Go to Step  4

Go to Step  5

4

Test the motor control circuits of the suspect motor 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  9

Go to Step  6

5

Inspect for poor connections at the harness connector of the suspect seat motor. 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  9

Go to Step  7

6

Inspect for poor connections at the harness connector of the memory seat module (MSM). 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  9

Go to Step  8

7

Replace the suspect seat motor. Refer to Seat Adjuster Motor Replacement - Power , Front Seat Recliner Actuator Motor Replacement , Driver Seat and Passenger Seat Head Restraint Adjuster Motor Replacement , or Front Seat Lumbar Support Replacement .

Did you complete the replacement?

--

Go to Step  9

--

8

Replace the memory seat module. Refer to Memory Seat Control Module Replacement .

Did you complete the replacement?

--

Go to Step  9

--

9

  1. Clear the DTCs using the scan tool.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.

Does the DTC reset?

--

Go to Step  2

System OK