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For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2005 🢒 XLR 🢒 Body 🢒 Doors 🢒 DTC B1474, B2981, B3848, or B3849

DTC B1474, B2981, B3848, or B3849 RCDLR

Circuit Description

The left front interior door handle, left front exterior door handle, right front interior door handle and right front exterior door handle switch signal circuits provide inputs to the remote control door lock receiver (RCDLR) when an interior or exterior door handle switch is activated. These inputs allow the RCDLR to detect a door open request. The RCDLR provides voltage to the door handle switches. If the RCDLR detects that a ground is applied for greater than 180 seconds, a DTC is set and the RCDLR will ignore the door handle switch input.

DTC Descriptors

This diagnostic procedure supports the following DTCs:

    • DTC B1474 Right Front/Passenger Exterior Door Handle Switch Circuit
    • DTC B2981 Right Front Door Handle Switch Circuit
    • DTC B3848 Interior Door Handle Switch Circuit
    • DTC B3849 Left Front/Driver Exterior Door Handle Switch Circuit

Conditions for Running the DTC

Battery voltage must be between 9-16 volts.

Conditions for Setting the DTC
    • The RCDLR detects a short to ground on an interior or exterior door handle switch signal circuit.
    • Condition must be present for greater than 180 seconds.

Action Taken When the DTC Sets

The RCDLR will ignore the door handle switch input.

Conditions for Clearing the DTC
    • The condition responsible for setting the DTC no longer exists.
    • You issue a scan tool CLEAR DTCs command.

Diagnostic Aids

The following conditions may cause an intermittent malfunction:

    • There is an intermittent short to ground in a door handle switch signal circuit.
    • An interior or exterior door handle switch is shorted to ground internally.
    • A interior or exterior door handle switch was activated for longer than 180 seconds.
    • Thoroughly inspect the wiring and connectors. An incomplete inspection of the wiring and connectors may result in misdiagnosis causing part replacement with the reappearance of the malfunction. If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Step

Action

Yes

No

Schematic Reference: Door Control Module Schematics

Connector End View Reference: Power Door Systems Connector End Views

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

2
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, observe the appropriate door handle switch parameter in the remote control door lock receiver (RCDLR) data list.

Does the scan tool display Inactive?

Go to Step 5

Go to Step 3

3
  1. Turn OFF the ignition.
  2. Disconnect the appropriate door handle switch.
  3. Turn ON the ignition, with the engine OFF.
  4. With a scan tool, observe the appropriate door handle switch parameter in the RCDLR data list.

Does the scan tool display Inactive?

Go to Step 6

Go to Step 4

4

Test the appropriate door handle 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 9

Go to Step 5

5

Inspect for poor connections at the harness connector of the RCDLR. 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 appropriate door handle 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 9

Go to Step 8

7

Replace the RCDLR. Refer to Control Module References in Computer/Integrating Systems for replacement, setup and programming.

Did you complete the replacement?

Go to Step 9

--

8

Replace the appropriate door handle switch. Refer to Door Latch Release Switch Replacement - Driver Side or Door Latch Release Switch Replacement - Passenger Side .

Did you complete the replacement?

Go to Step 9

--

9
  1. Use the scan tool in order to clear the DTCs.
  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

DTC B1474, B2981, B3848, or B3849 DDM/PDM

Circuit Description

The left front interior door handle, left front exterior door handle, right front interior door handle and right front exterior door handle switch signal circuits provide inputs to the driver door module (DDM) or passenger door module (PDM) when an interior or exterior door handle switch is activated. These inputs allow the door module to detect a door open request. The door modules provide voltage to the door handle switches. If the door module detects that a ground is applied for greater than 180 seconds, a DTC is set and the door module will ignore the door handle switch input.

DTC Descriptors

This diagnostic procedure supports the following DTCs:

    • DTC B1474 Right Front/Passenger Exterior Door Handle Switch Circuit
    • DTC B2981 Right Front Door Handle Switch Circuit
    • DTC B3848 Interior Door Handle Switch Circuit
    • DTC B3849 Left Front/Driver Exterior Door Handle Switch Circuit

Conditions for Running the DTC

Battery voltage must be between 9-16 volts.

Conditions for Setting the DTC
    • The DDM or PDM detects a short to ground on an interior or exterior door handle switch signal circuit.
    • The condition must be present for more than 180 seconds.

Action Taken When the DTC Sets

The DDM or PDM will ignore the door handle switch input.

Conditions for Clearing the DTC
    • The condition responsible for setting the DTC no longer exists.
    • You issue a scan tool CLEAR DTCs command.

Diagnostic Aids

The following conditions may cause an intermittent malfunction:

    • There is an intermittent short to ground in a door handle switch signal circuit.
    • An interior or exterior door handle switch is shorted to ground internally.
    • A interior or exterior door handle switch was activated for longer than 180 seconds.
    • Thoroughly inspect the wiring and connectors. An incomplete inspection of the wiring and connectors may result in misdiagnosis causing part replacement with the reappearance of the malfunction. If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Step

Action

Yes

No

Schematic Reference: Door Control Module Schematics

Connector End View Reference: Power Door Systems Connector End Views

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

2
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, observe the appropriate door handle switch parameter in the appropriate door module data list.

Does the scan tool display Inactive?

Go to Step 5

Go to Step 3

3
  1. Turn OFF the ignition.
  2. Disconnect the appropriate door handle switch.
  3. Turn ON the ignition, with the engine OFF.
  4. With a scan tool, observe the appropriate door handle switch parameter in the appropriate door module data list.

Does the scan tool display Inactive?

Go to Step 6

Go to Step 4

4

Test the appropriate door handle 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 9

Go to Step 5

5

Inspect for poor connections at the harness connector of the appropriate door 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 9

Go to Step 7

6

Inspect for poor connections at the harness connector of the appropriate door handle 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 9

Go to Step 8

7

Replace the appropriate door module. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 9

--

8

Replace the appropriate door handle switch. Refer to Door Latch Release Switch Replacement - Driver Side or Door Latch Release Switch Replacement - Passenger Side .

Did you complete the replacement?

Go to Step 9

--

9
  1. Use the scan tool in order to clear the DTCs.
  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