Pinpoint Tests AP: The Washer Fluid Level Low Display Does Not Operate Correctly
Instrumentation, Message Center and Warning Chimes
Pinpoint Tests
Pinpoint Test AP: The WASHER FLUID LEVEL LOW Display Does Not Operate Correctly
Refer to Wiring Diagram Set 60, Instrument Cluster for schematic and connector information. Diagrams By Number
Normal Operation
The washer fluid level switch is hardwired to the Instrument Cluster (IC) through circuit CMC20 (VT) and grounded through circuit GD123 (BK/GY). The IC provides a reference voltage to the washer fluid level switch through the signal circuit CMC20 (VT). When the washer fluid level is normal, the washer fluid level switch opens. When the washer fluid is low, the washer fluid level switch closes to ground pulling the signal circuit reference voltage low.
- DTC B1482 (Wiper Washer Fluid Level Sensor Circuit Short To Ground) - sets on-demand when the IC detects a short to ground on the low washer fluid level input, circuit CMC20 (VT). This DTC can only set when running the on-demand self-test.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Washer fluid level switch
- IC
PINPOINT TEST AP: THE WASHER FLUID LEVEL LOW DISPLAY DOES NOT OPERATE CORRECTLY
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery.
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AP1 CHECK FOR THE DOOR AJAR MESSAGE
- Ignition OFF.
- Close all doors, liftgate, liftgate glass or trunk.
- Ignition ON.
- Open the LH front door while monitoring the message center display.
- Does the message center display DRIVER DOOR AJAR?
Yes
GO to AP2.
No
GO to AP8.
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AP2 RETRIEVE THE RECORDED DTCs FROM BOTH THE CONTINUOUS AND ON-DEMAND IC SELF-TESTS
- Check for recorded IC DTCs from the continuous and on-demand self-tests.
- Is DTC B1482 recorded?
Yes
GO to AP3.
No
GO to AP5.
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AP3 CHECK THE WASHER FLUID LEVEL SENSOR
- 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 AP4.
No
INSTALL a new washer fluid level sensor. CLEAR the DTCs. REPEAT the self-test.
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AP4 CHECK CIRCUIT CMC20 (VT) FOR A SHORT TO GROUND
- Ignition OFF.
- Disconnect: IC C220.
- Measure the resistance between the IC C220-9, circuit CMC20 (VT), harness side and ground.
- Is the resistance greater than 10,000 ohms?
Yes
GO to AP8.
No
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
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AP5 CHECK CIRCUIT GD123 (BK/GY) FOR AN OPEN
- Ignition OFF.
- Disconnect: Negative Battery Cable.
- Disconnect: Washer Fluid Level Sensor C138.
- Measure the resistance between the washer fluid level switch C138-2, circuit GD123 (BK/GY), harness side and ground.
- Is the resistance less than 5 ohms?
Yes
GO to AP6.
No
REPAIR the circuit. TEST the system for normal operation.
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AP6 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.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: IC DataLogger.
- Select and monitor the low washer fluid switch (WASH_LEV) PID.
- Does the PID indicate low washer fluid level?
Yes
REMOVE the jumper wire. INSTALL a new washer fluid reservoir. TEST the system for normal operation.
No
REMOVE the jumper wire. GO to AP7.
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AP7 CHECK THE WASHER FLUID LEVEL SWITCH CIRCUIT CMC20 (VT) FOR AN OPEN
- Ignition OFF.
- Disconnect: IC C220.
- Measure the resistance between the IC C220-9, circuit CMC20 (VT), harness side and the washer fluid level switch C138-1, circuit CMC20 (VT), harness side.
- Is the resistance less than 5 ohms?
Yes
GO to AP8.
No
REPAIR the circuit. TEST the system for normal operation.
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AP8 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) Instrument Cluster (IC). 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.
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