B3810

DTC B3810

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 Descriptors

DTC B3810 02

-
Headlamp Washer Relay Circuit Short to Ground

DTC B3810 05

-
Headlamp Washer Relay Circuit Open or Short to Voltage

Diagnostic Fault Information






Circuit/System Description

The body control module (BCM) provides a high side driver output through the headlamp washer relay control circuit that controls the headlamp washer relay.

Conditions for Running the DTC

Battery voltage must be between 9-16 volts.

Conditions for Setting the DTC

B3810 02

The BCM detects a short to ground in the headlamp washer relay control circuit.

B3810 05

The BCM detects an open or short to voltage in the headlamp washer relay control circuit.

Actions Taken When the DTC Sets

The BCM disables the headlamp washer function.

Conditions for Clearing the DTC

* The current DTC will become history when the request for the output is removed or when the condition for setting the fault is corrected.

* The 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 5 Bow Lowered Switch (CM7)

Description and Operation

Exterior Lighting Systems Description and Operation Exterior Lighting Systems

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 Control Module References

Circuit/System Testing

1. Ignition OFF, disconnect the headlamp washer relay.

2. Test for less than 1.0 ohm between the ground circuit terminal A7 and ground.

• If greater than the specified range, test the ground circuit for an open/high resistance.

3. Connect a test lamp between the headlamp washer relay control circuit terminal C6 and the ground circuit terminal A7.

4. Command the headlamp washers ON and OFF with the headlamp washer switch. The test lamp should turn ON and OFF when changing between the commanded states.

• If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the BCM.

• If the test lamp is always OFF, test the control circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the BCM.

5. If all circuits test normal, test or replace the headlamp washer relay.

Component Testing

1. Ignition OFF, disconnect the HDLP WASH relay.

2. Test for 60-200 ohms between terminals C6 and A7.

• If the resistance is not within the specified range, replace the relay.

3. Test for infinite resistance between the following terminals:

* C6 and C7

* C6 and A6

* C7 and A7

* C7 and A6

• If not the specified value, replace the relay.

4. Install a 10A fused jumper wire between relay terminal C6 and 12 volts. Install a jumper wire between relay terminal A7 and ground. Test for less than 2 ohms between terminals C7 and A6.

• If greater than the specified range, replace the relay.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.

* Relay Replacement (Attached to Wire Harness) Relay Replacement (Attached to Wire Harness)Relay Replacement (Within an Electrical Center) Relay Replacement (Within an Electrical Center)

* Underhood Electrical Center or Junction Block Replacement Underhood Electrical Center or Junction Block Replacement

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