Pinpoint Test Q : C101A:1C, C101A:2A, C101A:2F, C101A:62

NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.

Q1 CHECK THE DTCs FROM THE ABS MODULE

Ignition ON.

Using a diagnostic scan tool, carry out the ABS module self-test.

Is DTC C1B14:11, C1B14:12 or U3000:47 present?

Yes	GO to Pinpoint Test AE .
No	If DTC C101A:2A or 62 is present, GO to Q2. If DTC C101A:1C or 2F is present, GO to Q3. For all other DTCs, REFER to Anti-Lock Brake System (ABS) and Stability Control .

Q2 CHECK THE BRAKE BOOSTER AND VACUUM HOSES FOR LEAKS
- Inspect the vacuum hoses, brake booster and brake booster seals for leaks or evidence of leaks.
Are any leaks or evidence of leaks found?

Yes REPAIR or INSTALL new components as necessary.

No GO to Q3.

Q3 CHECK THE VACUUM SENSOR WIRING FOR A SHORT TO VOLTAGE

Ignition OFF.

Disconnect ABS module C135 .

Disconnect Brake Booster Vacuum Sensor electrical connector.

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C135-26	Courtesy of FORD MOTOR COMPANY	Ground
C135-27	Courtesy of FORD MOTOR COMPANY	Ground
C135-30	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage present?

Yes	REPAIR the circuit.
No	GO to Q4.

Q4 CHECK THE VACUUM SENSOR WIRING FOR A SHORT TO GROUND

Ignition OFF.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C135-26	Courtesy of FORD MOTOR COMPANY	Ground
C135-27	Courtesy of FORD MOTOR COMPANY	Ground
C135-30	Courtesy of FORD MOTOR COMPANY	Ground

Are the resistances greater than 10, 000 ohms?

Yes	GO to Q5.
No	REPAIR the circuit.

Q5 CHECK THE VACUUM SENSOR WIRING FOR AN OPEN

Measure:

Positive Lead	Measurement / Action	Negative Lead
C135-26	Courtesy of FORD MOTOR COMPANY	C149-3
C135-27	Courtesy of FORD MOTOR COMPANY	C149-2
C135-30	Courtesy of FORD MOTOR COMPANY	C149-1

Are the resistances less than 3 ohms?

Yes	GO to Q6.
No	REPAIR the circuit.

Q6 CHECK THE VACUUM SENSOR WIRING FOR A SHORT TOGETHER

Measure:

Positive Lead	Measurement / Action	Negative Lead
C149-1	Courtesy of FORD MOTOR COMPANY	C149-3
C149-1	Courtesy of FORD MOTOR COMPANY	C149-2
C149-2	Courtesy of FORD MOTOR COMPANY	C149-1

Are the resistances greater than 10, 000 ohms?

Yes	INSTALL a new brake booster vacuum sensor. REFER to Power Brake Actuation . DRIVE the vehicle at speeds greater than 10 km/h (6 mph) for at least 4 minutes and CARRY OUT at least 3 stops. REPEAT the ABS module self-test. If DTC C101A:1C, C101A:2A, C101A:2F or C101A:62 returns, GO to Q7.
No	REPAIR the circuit.

Q7 CHECK FOR CORRECT ABS MODULE OPERATION

Ignition OFF.

Disconnect and inspect the ABS module C135 .

Repair:
- corrosion (install new connector or terminal - clean module pins)
- damaged or bent pins - install new terminals or pins
- pushed-out pins - install new pins as necessary

Connect the ABS module C135 . 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 TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no TSBs address this concern and the vehicle is not equipped with adaptive cruise control, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module . If no TSBs address this concern and the vehicle is equipped with adaptive cruise control, INSTALL a new ABS module and HCU. REFER to Hydraulic Control Unit (HCU) .

The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

Yes	REPAIR or INSTALL new components as necessary.
No	GO to Q3.