Pinpoint Test Ac: The Washer Fluid Level Low Message Is Inoperative/Always On

NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

NOTE: Verify that the washer fluid reservoir is full or empty depending on the customer concern to correctly verify the concern before proceeding with the diagnostics.

NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to BATTERY, BATTERY MOUNTING SYSTEM & BATTERY CABLES .

AC1 CHECK FOR THE DOOR AJAR MESSAGE
- Ignition OFF.
- Close all doors, liftgate, and hood.
- Ignition ON.
- Open the LH front door while monitoring the message center display.
- Does the message center display DRIVER DOOR AJAR?
- Yes: If the WASHER FLUID LEVEL LOW message is always on, go to AC2 .
  If the WASHER FLUID LEVEL LOW message is inoperative, go to AC4.
- No: Go to PINPOINT TEST AA .
AC2 CHECK THE WASHER FLUID LEVEL SWITCH
- Ignition OFF.
- Disconnect: Washer Fluid Level Switch C138.
- Ignition ON.
- Monitor the message center.
- Does the WASHER FLUID LEVEL LOW continue to display?
- Yes: Go to AC3 .
- No: INSTALL a new washer fluid level switch. TEST the system for normal operation.
AC3 CHECK THE WASHER FLUID LEVEL SIGNAL CIRCUIT FOR A SHORT TO GROUND
- Ignition OFF.
- Disconnect: IC C220.
- Measure the resistance between the IC C220-17, circuit CMC20 (VT), harness side and ground.
  
  Fig 1: Measuring Resistance Between IC C220-17, Circuit CMC20 (VT), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
- Yes: Go to AC7.
- No: REPAIR circuit CMC20 (VT) for a short to ground. TEST the system for normal operation.
AC4 CHECK THE WASHER FLUID LEVEL GROUND CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: Negative Battery Cable.
- Disconnect: Washer Fluid Level Switch C138.
- Measure the resistance between the washer fluid level switch C138-2, circuit GD123 (BK/GY), harness side and ground.
  
  Fig 2: Measuring Resistance Between Washer Fluid Level Switch C138-2, Circuit GD123 (BK/GY), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes: Go to AC5 .
- No: REPAIR circuit GD123 (BK/GY) for an open. TEST the system for normal operation.
AC5 CHECK THE WASHER FLUID LEVEL SWITCH
- Connect: Negative Battery Cable.
- Connect a fused jumper wire between the washer fluid level switch C138-1, circuit CMC20 (VT), harness side and ground.
  
  Fig 3: Connecting Fused Jumper Wire Between Washer Fluid Level Switch C138-1, Circuit CMC20 (VT), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Ignition ON.
- Monitor the message center.
- Does the message center display WASHER FLUID LEVEL LOW?
- Yes: REMOVE the jumper wire. INSTALL a new washer fluid level switch. TEST the system for normal operation.
- No: REMOVE the jumper wire. Go to AC6 .
AC6 CHECK THE WASHER FLUID LEVEL INPUT CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: IC C220.
- Measure the resistance between the IC C220-17, circuit CMC20 (VT), harness side and the washer fluid level switch C138-1, circuit CMC20 (VT), harness side.
  
  Fig 4: Measuring Resistance Between IC C220-17 And Washer Fluid Level Switch C138-1
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes: Go to AC7 .
- No: REPAIR circuit CMC20 (VT) for an open. TEST the system for normal operation.
AC7 CHECK FOR CORRECT IC OPERATION
- Disconnect the IC connector.
- Check for:
  - corrosion
  - damaged pins
  - pushed-out pins
- Connect the IC connector and make sure it seats correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- Yes: INSTALL a new IC . Refer to INSTRUMENT CLUSTER (IC) in this information. 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.