2010 Cadillac Truck SRX AWD V6-3.0L Page 697
3. Test for less than 2 ohm between the signal terminal 2 and the ground terminal 3 with the switch in the high beam position.
瀚慖f greater than the specified value, replace the S78 turn signal/multifunction switch.
4. Test for less than 2 ohm between the signal terminal 4 and the ground terminal 3 while holding the switch in the flash to pass position.
瀚慖f greater than the specified value, replace the S78 turn signal/multifunction switch.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Turn Signal Multifunction Switch Replacement (See: Lighting and Horns/Sensors and Switches - Lighting and Horns/Turn Signal
Switch/Service and Repair/Turn Signal Multifunction Switch Replacement)
* Control Module References (See: Testing and Inspection/Programming and Relearning)for BCM replacement, programming and setup
B3811
DTC B3811
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptor
DTC B3811 02
- Rear Washer Relay Circuit Short to Ground
Diagnostic Fault Information
Circuit/System Description
Rear Washer
When the Body Control Module detects that the Rear wiper/wash switch has activated the momentary Wash switch, it activates a High Side Drive
output which supplies Battery to the coil of the Rear Washer Pump Relay. This energizes the Relay, which switches Battery Power to the Washer
Pump Motor. The BCM will also activate continuous Low Speed Windshield Wipers as described above. This Washer and Wiper operation shall be
continued so long as the switch remains active. Upon termination the Rear Wash Motor will be deactivated and the Wiper shall move to its Park
Position and deactivate.
Conditions for Running the DTC
* Ignition ON.
* The system voltage is between 9-16 V.
Conditions for Setting the DTC
A short to ground is detected in the rear washer relay control circuit.
Action Taken When the DTC Sets
Washer operation is suspended.
