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For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2002 🢒 Eldorado 🢒 Body and Accessories 🢒 Seats 🢒 DTC B2130-B2133

Circuit Description

The memory function switches are normally open and are wired directly to the to the memory mirror module (MMM). When a memory recall switch is pressed, the switch pulls the 5 V signal circuit from the MMM low. The MMM senses that a memory recall signal was pulled low and a class 2 message is sent out to the memory seat module (MSM) identifying that the circuit is active. In response to this message, the MSM performs the requested function.

Conditions for Running the DTC

The MMM must be powered and can not have DTC B1982 - Device Power 1 Circuit High or B1983 - Device Power 1 Circuit Low as a current DTC for this DTC to set.

Conditions for Setting the DTC

If a memory recall switch circuit is active for more than 30 continuous seconds, the circuit will be considered shorted and the MMM will set this DTC.

Action Taken When the DTC Sets
    • The MMM ignores the invalid switch input from the memory function switch and will not respond to it.
    • The MMM will continue to respond to all other valid inputs from the other positioning switches.
    • All of the memory recall commands are ignored.

Conditions for Clearing the DTC
    • The DTC automatically clears when the switch circuit setting this DTC is no longer active.
    • A history DTC will clear after 50 consecutive ignition cycles if the condition for the malfunction is no longer present.

Test Description

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

  1. Checks the existing state of the memory recall switch number by using the current state of the switch signal parameter.

Step

Action

Yes

No

Schematic Reference: Memory 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

2

  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, observe the Memory Recall Switches parameter in the Memory Mirror Module (MMM) data list.

Does the scan tool display Idle?

Go to Step 3

Go to Step 4

3
  1. With a scan tool, observe the Memory Recall Switches parameter.
  2. Activate the appropriate memory function switch.

Does the Memory Recall Switches parameter change state?

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

Go to Step 4

4
  1. Turn OFF the ignition.
  2. Disconnect the memory function switch harness connector.
  3. Turn ON the ignition, with the engine OFF.
  4. With a scan tool, observe the Memory Recall Switches parameter.

Does the scan tool display Idle?

Go to Step  7

Go to Step 5

5

Test the appropriate memory switch signal circuit 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 10

Go to Step 6

6

Inspect for poor connections at the harness connector of the memory mirror module (MMM). 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 10

Go to Step 8

7

Inspect for poor connections at the harness connector of the memory function 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 10

Go to Step 9

8

Replace the memory mirror module. Refer to Memory Mirror Module Replacement in Doors.

Did you complete the replacement?

Go to Step 10

--

9

Replace the memory function switch. Refer to Front Side Door Window Switch Replacement .

Did you complete the replacement?

Go to Step 10

--

10
  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