Diagnostic Test

WARNING: This page is about a different car, the 2010 Dodge Charger and 2010 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.

BRAKE FLUID LEVEL SENSOR SIGNAL VOLTAGE BELOW 1.72 VOLTS
NOTE: This DTC must be active for the results of this test to be valid.
1. Turn the ignition on.
2. With the scan tool, read Brake Fluid Level Sensor Signal voltage.
  Is the voltage below 1.72 volts?
  
  Yes
  - Go to step 2
  No
  - Perform the ABS-INTERMITTENT CONDITION TEST. Refer to DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure .
CHECK BRAKE FLUID LEVEL
NOTE: Visually inspect for worn brake linings or undersized rotors.

Was low brake fluid level found?

Yes
- Repair as needed.
- Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
No
- Go to step 3
BRAKE FLUID LEVEL SENSOR INTERNAL FAILURE
1. Turn the ignition off.
2. Disconnect the Brake Fluid Level Sensor harness connector.
3. Turn the ignition on.
4. With the scan tool, read the Brake Fluid Level Sensor voltage.
  Is the voltage approximately 5 volts?
  
  Yes
  - Replace the Brake Fluid Level Sensor in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
  No
  - Go to step 4
CHECK THE (B20) BRAKE FLUID LEVEL SENSOR SIGNAL CIRCUIT FOR SHORT TO GROUND

Fig 1: Checking Brake Fluid Level Sensor Signal Circuit For Short To Ground
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Totally Integrated Power Module C2 harness connector.
3. Disconnect the Brake Fluid Level Sensor harness connector.
4. Measure the resistance of the (B20) Brake Fluid Level circuit in the Brake Fluid Level Sensor harness connector to ground.
  Is the resistance below 100 Ohms?
  
  Yes
  - Repair the (B20) Brake Fluid Level circuit for a short to ground.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
  No
  - Replace and program the Totally Integrated Power Module in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .