Pinpoint Test O: DTCs C0048:11, 12, 64; C1108:11, 12 And 1C
Anti-Lock Control - Hybrid
Pinpoint Tests
Pinpoint Test O: DTCs C0048:11, 12, 64; C1108:11, 12 and 1C
Refer to Wiring Diagram Set 42 (Escape/Mariner, Escape Hybrid/Mariner Hybrid), Vehicle Dynamic Systems for schematic and connector information. Diagrams By Number
Normal Operation
The booster travel sensor provides the ABS module with analog signal indicating the position of the diaphragm inside the brake booster. The ABS module supplies a reference voltage to the sensor along circuit VCB34 (WH/BU) and ground along circuit RCB33 (VT/GY). The ABS module receives a varying voltage proportional to the position of the diaphragm inside the brake booster along circuit CCB33 (GY/OG). The ABS module monitors the brake booster travel sensor circuits for circuit faults. The ABS module will also compare the brake booster travel sensor signal with other brake system inputs to verify that the brake booster travel sensor signal is accurate. If a brake booster travel sensor circuit or signal fault is detected, the red brake warning indicator will be illuminated.
C0048:11-C1108:12:
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Booster travel sensor
- ABS module
PINPOINT TEST O: DTCs C0048:11, 12, 64; C1108:11, 12 and 1C
NOTICE: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multi-meter probes.
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O1 CHECK THE DTCs FROM THE SELF-TEST
- Review the DTCs retrieved and recorded during Inspection and Verification.
- Is DTC C0048:11, 12 or 64 present?
Yes
If DTC C0048:11, is present, GO to O2.
If DTC C0048:12 is present, GO to O3.
If only DTC C0048:64 is present, GO to O4.
No
If DTC C1108:11 is present, GO to O6.
If DTC C1108:12 is present, GO to O5.
If only DTC C1108:1C is present, GO to O8.
For all other DTCs, REFER to the ABS Module DTC Chart. [1][2]Diagnostic Trouble Code Descriptions
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O2 CHECK THE CIRCUIT VCB34 (WH/BU) FOR A SHORT TO GROUND
- Ignition OFF.
- Disconnect: Booster Travel Sensor C149.
- Disconnect: ABS Module C155.
- Measure the resistance between the brake booster travel sensor C149-3, circuit VCB34 (WH/BU), harness side and ground.
- Is the resistance greater than 10,000 ohms?
Yes
GO to O4.
No
REPAIR circuit VCB34 (WH/BU). CLEAR the DTCs. REPEAT the self-test.
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O3 CHECK THE CIRCUIT VCB34 (WH/BU) FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect: Booster Travel Sensor C149.
- Disconnect: ABS Module C155.
- Ignition ON.
- Measure the voltage between the brake booster travel sensor C149-3, circuit VCB34 (WH/BU), harness side and ground.
- Is any voltage present?
Yes
REPAIR circuit VCB34 (WH/BU). CLEAR the DTCs. REPEAT the self-test.
No
GO to O4.
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O4 CHECK CIRCUITS VCB34 (BU/WH), RCB33 (VT/GY) AND CCB33 (GY/OG) FOR AN OPEN
- Ignition OFF.
- Disconnect: Booster Travel Sensor C149.
- Disconnect: ABS Module C155.
- Measure the resistance between the ABS module, harness side and the brake booster travel sensor, harness side as indicated in the following chart:
- Are the resistances less than 5 ohms?
Yes
If only DTC C0048:64 was retrieved from the self-test, INSPECT the mounting of the booster travel sensor.
If the mounting of the booster travel sensor is OK, INSTALL a new brake booster travel sensor.
For DTC C0048:11 and C0048:12, GO to O7.
No
REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.
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O5 CHECK CIRCUIT CCB33 (GY/OG) FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect: Booster Travel Sensor C149.
- Disconnect: ABS Module C155.
- Ignition ON.
- Measure the voltage between the brake booster travel sensor C149-1, circuit CCB33 (GY/OG), harness side and ground.
- Is any voltage present?
Yes
REPAIR circuit CCB33 (GY/OG). CLEAR the DTCs. REPEAT the self-test.
No
GO to O7.
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O6 CHECK CIRCUIT CCB33 (GY/OG) FOR A SHORT TO GROUND
- Ignition OFF.
- Disconnect: Booster Travel Sensor C149.
- Disconnect: ABS Module C155.
- Measure the resistance between the brake booster travel sensor C149-1, circuit CCB33 (GY/OG), harness side and ground.
- Is the resistance greater than 10,000 ohms?
Yes
REPAIR circuit CCB33 (GY/OG). CLEAR the DTCs. REPEAT the self-test.
No
GO to O7.
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O7 CHECK THE BOOSTER TRAVEL SENSOR AND BRAKE BOOSTER
- Connect: Booster Travel Sensor C149.
- Inspect the attachment of the booster travel sensor to the brake booster. Verify the booster travel is securely attached to the booster and that the booster and booster travel sensor are free of damage.
- Is the booster travel sensor and brake booster OK?
Yes
GO to O8.
No
INSTALL a new brake booster travel sensor.
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O8 CHECK THE BOOSTER TRAVEL SENSOR (BRKBST_MEMB) PID
- Connect: ABS Module C155.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: DataLogger - ABS Module.
- Monitor the BRKBST_MEMB PID while applying and releasing the brake pedal.
- Does the PID value increase when the brake pedal is pressed and decrease when the brake pedal is released?
Yes
CLEAR the DTCs. DRIVE the vehicle. REPEAT the self-test. If any of the DTCs identified in the normal operation of this pinpoint test return, GO to O9.
No
INSTALL a new brake booster travel sensor.
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O9 CHECK FOR CORRECT ABS MODULE OPERATION
- Disconnect all ABS module connections.
- Check for:
- corrosion.
- pushed-out pins.
- spread terminals.
- Connect all ABS module connections and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes
INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module Service and Repair. 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. CLEAR the DTCs. REPEAT the self-test.
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