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Washer Fluid Sensor Failure

  1. Turn ignition on. Using scan tool, erase BCM DTCs. Turn ignition off and then on. Turn wiper switch to each intermittent position, then low and high speed positions, then push washer switch. Wait 5 minutes before reading BCM DTCs. Read BCM DTCs. If scan tool displays WASHER FLUID SENSOR FAILURE, go to next step. If scan tool does not display WASHER FLUID SENSOR FAILURE, test is complete.
  2. Using scan tool, access BCM SENSORS. Read WASHER FLUID LEVEL SWITCH VOLTAGE. If scan tool displays voltage greater than 4.8 volts, go to next step. If voltage is less than 4.8 volts, replace Body Control Module (BCM). See BODY CONTROL MODULE  under REMOVAL & INSTALLATION. Perform VEHICLE THEFT SECURITY SYSTEM VERIFICATION TEST  under VERIFICATION TESTS.
  3. Inspect washer fluid level switch connector. Repair as needed. Perform BODY VERIFICATION TEST  under VERIFICATION TESTS. If washer fluid level switch connector is okay, go to next step.
  4. Turn ignition off. Disconnect washer fluid level switch connector. Using DVOM, measure resistance is between ground and terminal No. 2 (Black wire) at washer fluid level switch connector. If resistance is less 5 ohms, go to next step. If resistance is 5 ohms or greater, repair open in Black wire. Perform BODY VERIFICATION TEST  under VERIFICATION TESTS.
  5. Disconnect BCM C2 connector. See Figure . Turn ignition on. Using DVOM, measure voltage between ground and washer level switch connector terminal No. 1 (Black/Tan wire). If no voltage is present, go to next step. If any voltage is present, repair short to voltage in Black/Tan wire between BCM and washer level switch. Perform BODY VERIFICATION TEST  under VERIFICATION TESTS.
  6. Using scan tool, select BCM SENSORS. Read washer fluid switch voltage. Back probe a jumper wire between BCM C2 connector terminal No. 5 (Black/Tan wire) and ground. If washer fluid sense voltage is less than one volt, go to next step. If washer fluid sense voltage is greater than one volt, replace washer fluid level switch. Perform BODY VERIFICATION TEST  under VERIFICATION TESTS.
  7. Remove jumper wire. Using scan tool, access BCM SENSORS. Turn ignition on. Backprobe a jumper wire between ground and terminal No. 1 (Black/Tan wire) on washer fluid level switch connector. Read WASHER FLUID LEVEL SWITCH VOLTAGE. If voltage is less than one volt, replace washer fluid level switch. If voltage is one volt or greater, repair open in Black/Tan wire. Perform BODY VERIFICATION TEST  under VERIFICATION TESTS.
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