Pinpoint Test I: The Wash And Wipe Function Is Inoperative - Rear

WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

I1 CHECK THE MULTI-FUNCTION SWITCH
- Key in OFF position.
- Disconnect: Multi-function Switch C2081.
- Carry out the multi-function switch component test. Refer to COMPONENT TESTING .
- Did the multi-function switch pass the component test?
Yes : GO to I2.

No : INSTALL a new multi-function switch. REFER to STEERING COLUMN SWITCHES . TEST the system for normal operation.
I2 CHECK THE REAR WIPER OPERATION
- Connect: Multi-function Switch C2081.
- Key in ON position.
- Operate the rear washer pump.
- Does the rear wiper operate?
Yes : GO to I3.

No : GO to I6.
I3 CHECK CIRCUIT 406 (BN/WH) FOR VOLTAGE
- Key in OFF position.
- Disconnect: Rear Washer Pump C1097.
- Key in ON position.
- Measure the voltage between rear washer pump C1097-1, circuit 406 (BN/WH), harness side and ground.
  
  Fig 1: Checking Circuit 406 (BN/WH) For Voltage
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
Yes : GO to I5.

No : GO to I4.
I4 CHECK CIRCUIT 406 (BN/WH) FOR AN OPEN
- Key in OFF position.
- Disconnect: SJB C2280d.
- Measure the resistance between rear washer pump C1097-1, circuit 406 (BN/WH), harness side and SJB C2280d-30, circuit 406 (BN/WH), harness side.
  
  Fig 2: Checking Circuit 406 (BN/WH) For Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : GO to I7.

No : REPAIR the circuit. TEST the system for normal operation.
I5 CHECK CIRCUIT 488 (DG) FOR AN OPEN
- Key in OFF position.
- While activating the front washer pump using the multi-function switch, measure the resistance between rear washer pump C1097-2, circuit 488 (DG), harness side and ground.
  
  Fig 3: Checking Circuit 488 (DG) For An Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : INSTALL a new rear window washer pump. REFER to WASHER PUMP - REAR WINDOW in this article. TEST the system for normal operation.

No : REPAIR the circuit. TEST the system for normal operation.
I6 CHECK THE REAR WASHER SIGNAL CIRCUIT TO THE SJB ON CIRCUIT 488 (DG)
- Key in OFF position.
- Disconnect: SJB C2280e.
- Disconnect: Multi-function Switch C2081.
- Measure the resistance between SJB C2280e-10, circuit 488 (DG), harness side and multi-function switch C2081-11, circuit 488 (DG), harness side.
  
  Fig 4: Checking Rear Washer Signal Circuit To SJB On Circuit 488 (DG)
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : GO to I7.

No : REPAIR the circuit. TEST the system for normal operation.
I7 CHECK FOR CORRECT SJB OPERATION
- Disconnect all the SJB connectors.
- Check for:
  - corrosion.
  - pushed-out pins.
- Connect all the SJB connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes : INSTALL a new SJB. REFER to MULTIFUNCTION ELECTRONIC MODULES . REPEAT the SJB self-test.

TEST the system for normal operation.

No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.