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Home >> Audi >> 2016 >> S5 Prestige, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 766 (Wipers And Washers System) >> Diagnosis And Testing >> Wipers and Washers >> Pinpoint Tests >> Pinpoint Test L : The Rear Window Washer Is Inoperative Or Always On >> Pinpoint Test L : The Rear Window Washer Is Inoperative Or Always On

Pinpoint Test L : The Rear Window Washer Is Inoperative Or Always On

WARNING: This page is about a different car, the 2016 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.

  1. L1 CHECK THE REAR WIPER WASH SWITCH (R_WIPE_WASH_SW) PID

    • Ignition ON.
    • Using a diagnostic scan tool, view the SCCM PIDs.
    • Using a diagnostic scan tool, monitor the SCCM R_WIPE_WASH_SW PID.

    Does the PID indicate switch is activated? 

    Yes  INSTALL a new multifunction switch. REFER to Steering Column Switches . If the concern is still present, INSTALL a new SCCM. REFER to Steering Column Switches .
    No  GO to  L2.

  2. L2 CHECK THE WASHER PUMP RELAY

    • Ignition OFF.
    • Disconnect: Rear Washer Relay.
    • Substitute a known good relay.
    • Ignition ON.

    Does the washer pump continue to operate? 

    Yes  REMOVE the known good relay. GO to  L3.
    No  REMOVE the known good relay. INSTALL a new rear washer relay.

  3. L3 CHECK THE REAR WASHER RELAY CONTROL CIRCUIT FOR A SHORT TO GROUND

    • Ignition OFF.
    • Disconnect: Windshield Wiper Motor C1656 .
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      Rear washer relay, cavity 2
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  INSTALL a new windshield wiper motor. REFER to Wiper Motor - Windshield .
    No  REPAIR the circuit.
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