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For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1999 🢒 Eldorado 🢒 Body and Accessories 🢒 Seats 🢒 DTC 2130 Seat Motor Failure

Object Number: 501165 Size: MF
Power Seat Systems Components
Memory Seats Schematics

Circuit Description

The memory seat module (MSM) supplies voltage to the seat and the lumbar motors when the MSM receives an input in order to move the seats. This input may be a manual switch or a recall function.

Conditions for Setting the DTC
    • This DTC sets only if DTC MSM B1982 or DTC MSM B1983 is not current.
    • The MSM sets the DTC when only one seat motor is being driven and the motor's current draw is greater than 45 amperes.

Action Taken When the DTC Sets

All seat movement is stopped.

Conditions for Clearing the DTC

The memory seat module (MSM) does not detect the seat motor failure during the last monitoring cycle.

Test Description

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

  1. This step tests the horizontal motor.

    2.

  2. This step tests the rear vertical motor.

    3.

  3. This step tests the rear vertical motor.

    4.

  4. This step tests the recline motor.

    5.

  5. This step tests the lumbar horizontal motor.

    6.

  6. This step tests the lumbar vertical motor.

Step

Action

Value(s)

Yes

No

1

Was the entire Power Seat Systems Diagnostic System Check performed?

--

Go to Step  2

Go to Diagnostic System Check - Power Seat Systems

2

  1. Disconnect the left horizontal motor connector.
  2. Connect a fused jumper from battery positive voltage (B+) to one of the left horizontal motor cavities.
  3. Connect a fused jumper from the other left horizontal motor cavity to ground.

Does the left horizontal motor run?

--

Go to Step 3

Go to Step 33

3
  1. Disconnect the memory seat module (MSM) connector C4.
  2. Connect a J 39200 digital multimeter (DMM) from the MSM connector C4 cavity C (TAN) to the left horizontal motor cavity A (TAN).

Is the resistance within the specified range?

0-2 ohms

Go to Step 5

Go to Step 4

4

Repair the open in CKT 285 (TAN). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 34

--

5
  1. Disconnect the MSM connector C2.
  2. Connect a DMM from the MSM connector C2 cavity A (LT GRN) to the left horizontal motor cavity B (LT GRN).

Is the resistance within the specified range?

0-2 ohms

Go to Step 7

Go to Step 6

6

Repair the open in CKT 284 (LT GRN). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 34

--

7

  1. Disconnect the left rear vertical motor connector.
  2. Connect a fused jumper from battery positive voltage (B+) to one of the left rear vertical motor cavities.
  3. Connect a fused jumper from the other left rear vertical motor cavity to ground.

Does the left rear vertical motor run?

--

Go to Step 8

Go to Step 33

8

Connect a DMM from the MSM connector C4 cavity E (YEL) to the left rear vertical motor cavity B (YEL).

Is the resistance within the specified range?

0-2 ohms

Go to Step 10

Go to Step 9

9

Repair the open in CKT 282 (YEL). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 34

--

10

Connect a DMM from the MSM connector C2 cavity B (LT BLU) to the left rear vertical motor cavity A (LT BLU).

Is the resistance within the specified range?

0-2 ohms

Go to Step 12

Go to Step 11

11

Repair the open in CKT 283 (LT BLU). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 34

--

12

  1. Disconnect the left front vertical motor connector.
  2. Connect a fused jumper from battery positive voltage (B+) to one of the left front vertical motor cavities.
  3. Connect a fused jumper from the other left front vertical motor cavity to ground.

Does the left front vertical motor run?

--

Go to Step 13

Go to Step 33

13

Connect a DMM from the MSM connector C4 cavity A (DK GRN) to the left front vertical motor cavity B (DK GRN).

Is the resistance within the specified range?

0-2 ohms

Go to Step 15

Go to Step 14

14

Repair the open in CKT 286 (DK GRN). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 34

--

15
  1. Disconnect the MSM connector C3.
  2. Connect a DMM from the MSM connector C3 cavity F (DK BLU) to the left front vertical motor cavity A (DK BLU).

Is the resistance within the specified range?

0-2 ohms

Go to Step 17

Go to Step 16

16

Repair the open in CKT 287 (DK BLU). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 34

--

17

  1. Disconnect the left recline motor connector.
  2. Connect a fused jumper from battery positive voltage (B+) to one of the left recline motor cavities.
  3. Connect a fused jumper from the other left recline motor cavity to ground.

Does the left recline motor run?

--

Go to Step 18

Go to Step 33

18

Connect a DMM from the MSM connector C4 cavity D (LT GRN) to the left front vertical motor cavity B (LT GRN).

Is the resistance within the specified range?

0-2 ohms

Go to Step 20

Go to Step 19

19

Repair the open in CKT 276 (LT GRN). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 34

--

20

Connect a DMM from the MSM connector C2 cavity F (LT BLU) to the left front vertical motor cavity A (LT BLU).

Is the resistance within the specified range?

0-2 ohms

Go to Step 22

Go to Step 21

21

Repair the open in CKT 277 (LT BLU). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 34

--

22

  1. Disconnect the left lumbar horizontal motor connector.
  2. Connect a fused jumper from battery positive voltage (B+) to one of the left lumbar horizontal motor connector C1 cavities.
  3. Connect a fused jumper from the other left lumbar horizontal motor connector C1 cavity to ground.

Does the left lumbar horizontal motor run?

--

Go to Step 23

Go to Step 33

23

Connect a DMM from the MSM connector C4 cavity F (PNK) to the left lumbar horizontal motor connector C1 cavity B (PNK/BLK).

Is the resistance within the specified range?

0-2 ohms

Go to Step 25

Go to Step 24

24

Repair the open in CKT 610 (PNK). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 34

--

25

Connect a DMM from the MSM connector C3 cavity B (DK BLU) to the left lumbar horizontal motor cavity A (DK BLU/WHT).

Is the resistance within the specified range?

0-2 ohms

Go to Step 27

Go to Step 26

26

Repair the open in CKT 611 (DK BLU). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 34

--

27

  1. Disconnect the left lumbar vertical motor connector C1.
  2. Connect a fused jumper from battery positive voltage (B+) to one of the left lumbar vertical motor connector C1 cavities.
  3. Connect a fused jumper from the other left lumbar vertical motor connector C1 cavity to ground.

Does the left lumbar vertical motor run?

--

Go to Step 28

Go to Step 33

28

Connect a DMM from the MSM connector C3 cavity A (TAN) to the left lumbar vertical motor connector C1 cavity A (TAN/WHT).

Is the resistance within the specified range?

0-2 ohms

Go to Step 30

Go to Step 29

29

Repair the open in CKT 768 (TAN). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 34

--

30

Connect a DMM from the MSM connector C3 cavity E (PPL) to the left lumbar vertical motor connector C1 cavity B (PPL/WHT).

Is the resistance within the specified range?

0-2 ohms

Go to Step 32

Go to Step 31

31

Repair the open in CKT 767 (PPL). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 34

--

32
  1. Clear the DTCs from memory and cycle the ignition.
  2. Operate all of the left seat motors.
  3. If DTC MSM B2130 sets, replace the MSM.

Is the repair complete?

--

Go to Step 34

--

33

Replace the suspect motor.

Is the motor replacement complete?

--

Go to Step 34

--

34

Clear the DTCs from memory.

Have the DTCs been cleared from memory and the Diagnostic System Check - Power Seat Systems performed?

--

System OK

--