B3811

DTC B3811

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.

* Diagnostic Procedure Instructions 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 (BCM) 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.

Conditions for Clearing the DTC

* A current DTC clears when the diagnostic runs and passes.

* A history DTC will clear after 50 consecutive ignition cycles without a fault present.

Reference Information

Schematic Reference

Wiper/Washer Schematics Electrical Diagrams

Connector End View Reference

Component Connector End Views Sunshade - Left Front

Description and Operation

Wiper/Washer System Description and Operation Description and Operation

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Programming and Relearning for scan tool information

Circuit/System Testing

1. Ignition OFF, disconnect the X4 harness connector at the X50A fuse block - underhood.

2. Disconnect the X5 harness connector at the K9 BCM.

3. Test for less than 5 ohms between the control circuit terminal K6 at the X50A fuse block - underhood and the control circuit terminal 11 at the K9 BCM.

• If the value is not within the specified range, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, test or replace the K9 BCM.

4. Test for infinite resistance between the control circuit terminal K6 at the X50A fuse block - underhood and ground.

• If the value is not within the specified range, test the control circuit for a short to ground.

5. If all circuits test normal, test or replace the X50A fuse block - underhood.

Component Testing

Relay Test

1. Ignition OFF, disconnect the harness connector X2 at the X50A fuse block - underhood.

2. Test for 60-200 ohms between control circuit terminal K6 and ground.

• If the value is not within the specified range, test the control circuit for a short to ground, short to voltage or an open. If all circuits test normal, test or replace the X50A fuse block - underhood.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

* Windshield Washer Pump Replacement (Terrain) Windshield Washer Pump ReplacementWindshield Washer Pump Replacement (Equinox) Windshield Washer Pump Replacement

* Control Module References Programming and Relearning for BCM replacement, programming and setup