LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2022 >> Transit Connect Titanium, Gas/Ethanol >> Repair and Diagnosis >> External Pages >> Different car >> Section 601 (Instrumentation, Message Center And Warning Chimes (2 Of 2)) >> Diagnosis And Testing >> Instrumentation, Message Center and Warning Chimes >> Pinpoint Tests >> Pinpoint Test V: The Brake Warning Indicator Or RTT (RECONFIGURABLE Telltale) Indicator Is Always On

Pinpoint Test V: The Brake Warning Indicator Or RTT (RECONFIGURABLE Telltale) Indicator Is Always On

WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
  1. Refer to Wiring Diagrams INSTRUMENT CLUSTER for schematic and connector information.

    Normal Operation and Fault Conditions 

    See Brake Warning. REFER to: Instrument Panel Cluster (IPC) - System Operation and Component Description .

    If the brake (red) warning indicator request, brake warning indicator request or park brake lamp request messages are missing for 5 seconds longer, the IPC defaults the brake warning indicator on.

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    ABS C0049:01 Brake Fluid Level: General Electrical Failure A continuous and on-demand DTC that sets in the ABS module when the ABS module detects and open on the brake fluid level switch input.
    ABS C0049:7B Brake Fluid Level: Low Fluid Level A continuous and on-demand DTC that sets in the ABS module when the ABS module detects a low brake fluid level input from the brake fluid level switch.

    Possible Sources 

    • Wiring, terminals or connectors
    • Brake fluid level switch
    • Communication concern
    • ABS
    • GWM
    • IPC

    Visual Inspection and Pre-checks 

    • Inspect the base brake system and the parking brake system for correct operation.
    • Inspect the brake fluid level switch connection and check for signs of connector terminal damage, corrosion or pushed-out pins.
    • Inspect the brake fluid level switch wiring for signs of a cut or opened circuit.
    • Inspect the brake fluid level switch for signs of any external damage.

  2. V1 RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE IPC (INSTRUMENT PANEL CLUSTER) SELF-TEST

    • Ignition ON.

    • Using a diagnostic scan tool, perform the IPC self-test.

    Are any Diagnostic Trouble Codes (DTCs) recorded? 

    Yes  REFER to Diagnostic Trouble Code (DTC) Chart .
    No  GO to  V2

  3. V2 RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE SELF-TEST

    • Using a diagnostic scan tool, perform the ABS module self-test.

    Are any Diagnostic Trouble Codes (DTCs) recorded? 

    Yes  For DTC C0049:01, GO to  V6 For DTC C0049:7B, VERIFY the brake fluid level is low. If the brake fluid level is low, CORRECT the low brake fluid condition. If the brake fluid level is not low, GO to  V5 For all other Diagnostic Trouble Codes (DTCs), REFER to: Anti-Lock Brake System (ABS) and Stability Control .
    No  GO to  V3

  4. V3 CHECK THE GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)

    • Using a diagnostic scan tool, check the GWM Continuous Memory Diagnostic Trouble Codes (DTCs).

    Are any Diagnostic Trouble Codes (DTCs) recorded? 

    Yes  REFER to: Controller Area Network (CAN) Module Communications Network .
    No  GO to  V4

  5. V4 CHECK THE PARKING BRAKE OPERATION

    • Check the parking brake operation while applying and releasing the parking brakes using the switch.

    Do the parking brakes apply when switched on and release when switched off? 

    Yes  GO to  V14
    No  REFER to: Parking Brake .

  6. V5 CHECK THE BRAKE FLUID LEVEL SWITCH CIRCUITS FOR A SHORT TOGETHER AT THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE

    • Disconnect ABS module C135.

    • Disconnect Brake Fluid Level Switch C124.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C135-34
      GFD560559Courtesy of FORD MOTOR COMPANY
      		 C135-32

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  V13
    No  REPAIR the circuits.

  7. V6 CHECK THE BRAKE FLUID LEVEL SWITCH INPUT CIRCUIT FOR A SHORT TO VOLTAGE

    • Ignition OFF.

    • Disconnect ABS module C135.

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C135-34
      GFD560558Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the circuit.
    No  GO to  V7

  8. V7 CHECK THE BRAKE FLUID LEVEL SWITCH INPUT CIRCUIT FOR A SHORT TO GROUND

    • Ignition OFF.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C135-34
      GFD560559Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance less than 3 ohms? 

    Yes  GO to  V8
    No  GO to  V13

  9. V8 CHECK THE BRAKE FLUID LEVEL SWITCH INPUT CIRCUIT FOR AN OPEN

    • Ignition OFF.

    • Disconnect Brake Fluid Level Switch C124.

    • Measure:

      2.0L, 2.5L HEV 

      Positive Lead Measurement / Action Negative Lead
      C135-34
      GFD560559Courtesy of FORD MOTOR COMPANY
      		 C124-2

    Is the resistance less than 3 ohms? 

    Yes  GO to  V9
    No  REPAIR the circuit.

  10. V9 CHECK THE LOW BRAKE FLUID LEVEL SWITCH GROUND CIRCUIT FOR A SHORT TO VOLTAGE

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C124-1
      GFD560558Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  GO to  V10
    No  REPAIR the circuit.

  11. V10 CHECK THE LOW BRAKE FLUID LEVEL SWITCH GROUND CIRCUIT FOR AN OPEN

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C124-1
      GFD560559Courtesy of FORD MOTOR COMPANY
      		 C135-32

    Is the resistance less than 3 ohms? 

    Yes  GO to  V11
    No  REPAIR the circuit.

  12. V11 CHECK THE LOW BRAKE FLUID LEVEL SWITCH GROUND CIRCUIT FOR A SHORT TO GROUND

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C124-1
      GFD560559Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  V12
    No  REPAIR the circuit.

  13. V12 CHECK THE LOW BRAKE FLUID LEVEL SWITCH INPUT CIRCUIT FOR A SHORT TO GROUND WITH THE BRAKE FLUID LEVEL SWITCH DISCONNECTED

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C135-32
      GFD560559Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  INSTALL a new brake fluid level switch. REFER to: Brake Fluid Reservoir .
    No  REPAIR the circuit.

  14. V13 CHECK FOR CORRECT ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OPERATION

    • Ignition OFF.

    • Disconnect and inspect the ABS module connectors.

    • Repair:

      • corrosion (install new connector or terminals - clean module pins)
      • damaged or bent pins - install new terminals/pins
      • pushed-out pins - install new pins as necessary

    • Reconnect the ABS module connectors. Make sure they seat and latch correctly.

    • Operate the system and determine if the concern is still present.

    Is the concern still present? 

    Yes  CHECK OASIS for any applicable service articles: TSB, GSB, SSM, or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new ABS module. REFER to: Anti-Lock Brake System (ABS) Module .
    No  The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

  15. V14 CHECK FOR CORRECT IPC (INSTRUMENT PANEL CLUSTER) OPERATION

    • Ignition OFF.

    • Disconnect and inspect the IPC connector.

    • Repair:

      • corrosion (install new connector or terminals - clean module pins)
      • damaged or bent pins - install new terminals/pins
      • pushed-out pins - install new pins as necessary

    • Reconnect the IPC connector. Make sure it seats and latches correctly.

    • Operate the system and determine if the concern is still present.

    Is the concern still present? 

    Yes  CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new IPC. REFER to: Instrument Panel Cluster (IPC) .
    No  The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
scientia non olet · About LEMON Manuals