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Home >> Chrysler >> 2009 >> 300 Signature Series >> Repair and Diagnosis >> External Pages >> Different car >> Section 237 (Anti-Lock Brake System & Adjustable Pedals - Electrical Diagnostics) >> Electrical Diagnostics >> Abs >> DTC Troubleshooting >> C1008-Brake Fluid Level Circuit High >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2008 Dodge Magnum, 2008 Dodge Charger, and 2008 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
  1. BRAKE FLUID LEVEL SWITCH SIGNAL VOLTAGE ABOVE 3.7 VOLTS 
    NOTE: This DTC must be active for the results of this test to be valid.

    Turn the ignition on.

    With the scan tool, read Brake Fluid Level Switch Signal voltage.

    Is the voltage above 3.7 volts? 

    Yes 

    1. Go To  2.

    No 

    1. Refer to the ABS INTERMITTENT CONDITION  diagnostic procedure.
  2. (B20) BRAKE FLUID LEVEL SWITCH SIGNAL CIRCUIT FOR SHORT TO BATTERY VOLTAGE 
    Fig 1: Measuring Voltage Of (B20) Brake Fluid Level Signal Circuit In Brake Fluid Level Switch Harness Connector To Ground
    GC0070052Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Disconnect the Brake Fluid Level Switch harness connector.

    Turn the ignition on.

    Measure the voltage of the (B20) Brake Fluid Level signal circuit in the Brake Fluid Level Switch harness connector to ground.

    Is the voltage above 5.2 volts? 

    Yes 

    1. Repair the (B20) Brake Fluid Level signal circuit for a short to voltage.
    2. Perform ABS VERIFICATION TEST .

    No 

    1. Go To  3.
  3. BRAKE FLUID LEVEL SWITCH INTERNAL FAILURE 
    Fig 2: Brake Fluid Level Switch Internal Failure
    GC0041133Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Connect a jumper wire between the (B20) Brake Fluid Level signal circuit and the (Z902) Brake Fluid Level ground circuit in the Brake Fluid Level Switch harness connector

    Turn the ignition on.

    With the scan tool, read the Brake Fluid Level Switch voltage

    Is the voltage below 1.0 volt? 

    Yes 

    1. Replace the Brake Fluid Level Switch in accordance with the Service Information.
    2. Perform ABS VERIFICATION TEST .

    No 

    1. Go To  4.
  4. (B20) BRAKE FLUID LEVEL SWITCH CIRCUIT OPEN 
    Fig 3: Measuring Resistance Of (B20) Brake Fluid Level Signal Circuit Between Brake Fluid Level Switch Harness Connector
    GC0070053Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Disconnect the Brake Fluid Level Switch.

    Disconnect the TIPM harness connector.

    Measure the resistance of the (B20) Brake Fluid Level signal circuit between the Brake Fluid Level Switch harness connector and the TIPM harness connector.

    Is the resistance below 5 ohms? 

    Yes 

    1. Go To  5.

    No 

    1. Repair the open in the (B20) Brake Fluid Level Switch signal circuit.
    2. Perform ABS VERIFICATION TEST .
  5. (Z902) SENSOR GROUND CIRCUIT OPEN 
    Fig 4: Measuring Resistance Of (Z902) Brake Fluid Level Switch Ground Circuit Between Brake Fluid Level Switch Harness Connector
    GC0070054Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Disconnect the Brake Fluid Level Switch harness connector.

    Reconnect the TIPM harness connector.

    Measure the resistance of the (Z902) Brake Fluid Level Switch ground circuit between the Brake Fluid Level Switch harness connector and ground.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Replace and program the Totally Integrated Power Module in accordance with the Service Information.
    2. Perform BODY VERIFICATION TEST - VER 1 .

    No 

    1. Repair the open in the (Z902) Sensor ground circuit.
    2. Perform ABS VERIFICATION TEST .
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