Windshield Washer Solvent Heater Malfunction
Windshield Washer Solvent Heater Malfunction
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.
Diagnostic Fault Information
Circuit/System Description
The heated windshield washer fluid operation is controlled by a separate switch located on the turn signal/multifunction switch. When the heated washer fluid switch is pressed, ground is momentarily applied through the switch contacts and the heated washer fluid switch signal circuit to the windshield washer solvent heater assembly. In response to this signal, the washer solvent heater assembly then applies battery voltage to its internal washer fluid heating elements and pulls the heated washer fluid indicator control circuit low commanding the DIC to display the HEATING WASH FLUID WASH WIPES PENDING message. The washer fluid is then heated as it passes through the heater assembly to the windshield.
Reference Information
Schematic Reference
Wiper/Washer Schematics ([1][2]Electrical Diagrams)
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
Wiper/Washer System Description and Operation (Wiper and Washers) (Wiper/Washer System Description and Operation (Wiper and Washers))Wiper/Washer System Description and Operation (Heated Washer System) (Wiper/Washer System Description and Operation (Heated Washer System))
Electrical Information Reference
* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)
Scan Tool Reference
Control Module References (Programming and Relearning) for scan tool information
Circuit/System Testing
Windshield Washer Solvent Heater Malfunction
1. Ignition OFF, disconnect the X1 harness connector at the windshield washer solvent heater assembly.
2. Test for less than 5 ohms between the ground circuit terminal 2 and ground.
• If greater than 5 ohms, test the ground circuit for an open/high resistance.
3. Ignition ON, verify that a test lamp illuminates between the battery positive voltage circuit terminal 1 and ground.
• If the test lamp does not illuminate, test the battery positive voltage circuit for a short to ground or an open/high resistance.
4. Ignition OFF, disconnect the X2 harness connector at the windshield washer solvent heater assembly.
5. Test for less than 5 ohms between the ground circuit terminal 4 and ground.
• If greater than 5 ohms, test the ground circuit for an open/high resistance.
6. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 6 and ground.
• If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
7. Connect a test lamp between the heated washer fluid switch signal circuit terminal 1 and battery voltage.
8. The test lamp should turn ON and OFF while pressing and releasing the heated washer fluid switch.
• If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the turn signal/multifunction switch.
• If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the turn signal/multifunction switch.
9. Ignition ON, verify that a test lamp does not illuminate between the heated washer fluid indicator control circuit terminal 2 and ground.
• If the test lamp illuminates, test the control circuit for a short to voltage. If the circuit tests normal, replace the instrument panel cluster (IPM).
10. If all circuits test normal, test or replace the windshield washer solvent heater assembly.
Windshield Heated Washer Fluid Indicator Inoperative
1. Ignition OFF, disconnect the X2 harness connector at the windshield washer solvent heater assembly.
2. Ignition ON, install a 3A fused jumper wire between the heated washer fluid indicator control circuit terminal 2 and ground. Verify the DIC displays the HEATING WASH FLUID WASH WIPES PENDING message.
• If the message is not displayed, test the control circuit for a short to voltage or open/high resistance. If the circuit tests normal, replace the instrument panel cluster (IPM).
3. If all circuits test normal, replace the windshield washer solvent heater assembly.
Windshield Heated Washer Fluid Indicator Always On
1. Ignition OFF, disconnect the X2 harness connector at the windshield washer solvent heater assembly.
2. Ignition ON, the DIC should not display the HEATED WASHER FLUID WASHER SYSTEM OFF message.
• If displayed, test the heated washer fluid indicator control circuit for a short to ground. If the circuit tests normal, replace the instrument panel cluster.
3. If all circuits test normal, replace the windshield washer solvent heater assembly.
Component Testing
Heated Washer Fluid Switch
1. Ignition OFF, disconnect the X4 harness connector at the turn signal/multifunction switch.
2. Test for infinite resistance between the signal terminal 1 and the ground terminal 2 with the switch in the open position.
• If less than infinite, replace the turn signal/multifunction switch switch.
3. Test for less than 3 ohms between the signal terminal 1 and the ground terminal 2 with the switch in the closed position.
• If greater than 3 ohms, replace the turn signal/multifunction switch.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Turn Signal Multifunction Switch Replacement (Turn Signal Multifunction Switch Replacement)
* Windshield Washer Solvent Heater Replacement (Service and Repair)
* Control Module References (Programming and Relearning) for IPC replacement, setup, and programming