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For 1990-2009 cars only
Makes 🢒 Buick 🢒 2000 🢒 LeSabre 🢒 DTC 🢒 DTC B3472 RF Window Express Down Circuit Low

Object Number: 428921 Size: MF
LH Front Door
Handling ESD Sensitive Parts Notice
Front Door Dimming

Circuit Description

The switch that failed and generated this diagnostic trouble code (DTC) is part of the driver door switch. This module contains a microprocessor which takes the ground signal generated by this switch and assigns a digital message to the switch signal. The driver door switch then sends this message over a simple bus interface (SBI) link to the driver door module (DDM).

Conditions for Running the DTC

The DDM must be powered and must not have DTCs B1327-Battery Low Voltage or B1328-Battery High Voltage set for this DTC to set.

Conditions for Setting the DTC

If the driver door module (DDM) receives the message that the switch is closed for more than 15 continuous seconds the DDM sets this DTC.

Action Taken When the DTC Sets

When this DTC is set the express function is disabled. Regular operation is not affected.

Conditions for Clearing the DTC

The DDM clears this DTC when the switch message is not received.

Test Description

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

  1. Checks the existing state of the driver door window switch module right front passenger window switch by using the current state of the input parameter.

Step

Action

Yes

No

1

Did you perform the Door Systems Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Door Systems

2

  1. Install a scan tool.
  2. Turn ON the ignition leaving the engine OFF.
  3. Observe the Driver RF Window Sw. parameter in the Driver Door Module data list using the scan tool.

Does the scan tool display Idle?

Go to Step 3

Go to Step 4

3
  1. Activate the driver's window switch.
  2. Observe the Driver RF Window Sw. parameter using the scan tool.

Does the Driver RF Window Sw. parameter change state?

Go to Step 9

Go to Step 4

4
  1. Turn OFF the ignition.
  2. Disconnect the driver door switch assembly (DDSA).
  3. Turn ON the ignition leaving the engine OFF.
  4. Observe the Driver RF Window Sw. parameter using the scan tool.

Does the scan tool indicate the Idle state?

Go to Step 6

Go to Step 5

5

Inspect for poor connections/terminal tension at the driver door module harness connector. 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/terminal tension at the driver door switch assembly (DDSA) harness connector. 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 driver door module. Refer Door Control Module Replacement .

Did you complete the replacement?

Go to Step 9

--

8

Replace the driver door switch assembly (DDSA). Refer to Front Door Switch 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