DTC B1474 or B3849. Cadillac SLS 2008

For 1990-2009 cars only

Makes 🢒 Cadillac 🢒 2008 🢒 SLS 🢒 Body Systems 🢒 Vehicle Access 🢒 DTC B1474 or B3849

Circuit Description

The left front exterior door handle and right front exterior door handle switch signal circuits provide inputs to the driver door module (DDM) and passenger door module (PDM) when an 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 30 seconds continuously, 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 Exterior Door Handle Switch Circuit

•	DTC B3849 Exterior Door Handle Switch Circuit

This vehicle has DTCs which include DTC symptoms. For more information on DTC symptoms, refer to DTC Symptom Description.

DTC Symptom	DTC Symptom Descriptor
02	Short to Ground

Conditions for Running the DTC

•	The DDM and PDM must be powered.

•	DTC B1325 Battery Voltage Out of Range, must not be current.

Conditions for Setting the DTC

The DDM or PDM detects that the exterior door handle switch signal circuit is closed for more than 30 continuous seconds.

Action Taken When the DTC Sets

The DDM or PDM ignores inputs from the exterior door handle switch until the switch changes state.

Conditions for Clearing the DTC

•	The condition responsible for setting the DTC no longer exists.

•	You issue a scan tool CLEAR DTCs command.

•	After 40 consecutive warm-up cycles without failure, the history DTC will be cleared.

Diagnostic Aids

An intermittently sticking exterior door handle can cause this DTC to set. 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.

Step	Action	Yes	No
Schematic Reference: Door Control Module Schematics Connector End View Reference: Vehicle Access Connector End Views
1	Did you perform the Diagnostic System Check - Vehicle?	Go to Step 2	Go to Diagnostic System Check - Vehicle
2	Install a scan tool. Turn ON the ignition, with the engine OFF. With a scan tool, observe the appropriate Door Handle parameter in the appropriate door control module data list. Does the scan tool display Inactive?	Go to Step 5	Go to Step 3
3	Turn OFF the ignition. Disconnect the appropriate door handle switch. Turn ON the ignition, with the engine OFF. With a scan tool, observe the appropriate Door Handle parameter in the appropriate door control module data list. Does the scan tool display Inactive?	Go to Step 6	Go to Step 4
4	Test the appropriate door handle lift switch signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs. 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 control module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs. 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. Did you find and correct the condition?	Go to Step 9	Go to Step 8
7	Replace the appropriate door control module. Refer to Control Module References for replacement, setup and programming. Did you complete the replacement?	Go to Step 9	--
8	Replace the appropriate door handle switch. Refer to Front Outside Door handle Replacement . Did you complete the replacement?	Go to Step 9	--
9	Use the scan tool in order to clear the DTCs. 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