Workshop Manuals Factory service & repair Vauxhall
Vauxhall Astra J05 · Body Systems
05 · Body & interior

DTC B3810

Make
Vauxhall
Model
Astra J
Section
Wipers and Washers › Other Information › DTC B3810
Body SystemsDTC B3810

DTC B3810

Diagnostic Instructions

•  Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
•  Review Strategy Based Diagnosis for an overview of the diagnostic approach.
•  Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC B3810 02: Headlamp Washer Relay Circuit Short to Ground

Diagnostic Fault Information



Circuit
Short to Ground
Open/High Resistance
Short to Voltage
Signal Performance

Headlamp Washer Fluid Pump Control
1
1
2
-

Headlamp Washer Relay Control
B3810 02
1
2
-

Headlamp Washer Fluid Pump Ground
-
1
1
-

1. Headlamp Washer Inoperative

2. Headlamp Washers Always ON
 

Circuit/System Description

The body control module (BCM) controls the washer motor based on an input from the windshield wiper washer switch. The BCM monitors the washer switch through the windshield washer switch signal circuit. When the WASH switch is closed, ground is supplied to the front washer switch signal circuit. When this is seen, the BCM will command the front washer fluid pump and the low speed wipers on. When Headlamp Wash Equipped, the headlamps shall be sprayed with wash fluid as a result of an extended Windshield Wash Switch Activation. In order to preserve wash fluid, the feature shall only be allowed to activate if the Low or High Beam Headlamps are active. In addition, after the initial Headlamp Wash operation has been performed, additional headlamp washes shall not be performed for the next 4 Windshield Wash activations or for 48 hours whichever comes first. In the event that the system has detected a Stuck Front Wash Switch condition, the Headlamp Wash Feature shall be disabled.

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 headlamp 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.

Diagnostic Aids

The headlamp wash feature shall only be allowed to be activated if the low or high beam headlamps are active too.

Reference Information


Schematic Reference

Wiper/Washer Schematics


Connector End View Reference

Component Connector End Views


Description and Operation

Wiper/Washer System Description and Operation


Electrical Information Reference


Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Operate the washers using the S82 windshield wiper/washer switch. Verify the G16 headlamp washer fluid pump activates.

Circuit/System Testing

1. Ignition OFF, disconnect the KR2 headlamp washer fluid pump relay.
2. Verify a test lamp illuminates between the ground circuit terminal 85 and B+.
⇒ If the test lamp does not illuminate, test the ground circuit for an open/high resistance or a short to voltage.
⇒ If the circuit tests normal, replace the X50A underhood fuse block.
3. Connect a test lamp between the control circuit terminal 86 and ground.
4. Ignition ON, command the headlamp washer ON and OFF using the wiper 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 K9 body control module.
⇒ If the test lamp is always OFF, test for a short to ground or an open/high resistance on the control circuit. If the circuit tests normal, replace the K9 body control module.
5. If all circuits test normal, test or replace the KR2 headlamp washer fluid pump relay.

Component Testing

Relay Test

1. Ignition OFF, disconnect the KR2 headlamp washer fluid pump relay.
2. Test for 60-200 Ω between terminals 85 and 86.
⇒ If the resistance is not within the specified range, replace the relay.
3. Test for infinite resistance between the following terminals:
  •  30 and 86
  •  30 and 87
  •  30 and 85
  •  85 and 87
⇒ If not the specified value, replace the relay.
4. Install a 10 A fused jumper wire between relay terminal 85 and 12 V. Install a jumper wire between relay terminal 86 and ground. Test for less than 5 Ω between terminals 30 and 87.
⇒ If greater than the specified range, replace the relay.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

•  Control Module References for BCM replacement, programming and setup

Parts & tools for this job For Vauxhall Astra

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