Pinpoint Test B : C1D00:16, C1D00:17, C1D00:71 Or P05E6:92

WARNING: This page is about a different car, the 2020 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

B1 TEST THE PARKING BRAKE SWITCH IN THE APPLIED POSITION

Ignition OFF.

Disconnect parking brake switch C2015.

With the parking brake switch in the applied position (switch pulled up), measure:

Positive Lead	Measurement / Action	Negative Lead
C2015-5 Component side	Courtesy of FORD MOTOR COMPANY	C2015-7 Component side
C2015-6 Component side	Courtesy of FORD MOTOR COMPANY	C2015-8 Component side
C2015-4 Component side	Courtesy of FORD MOTOR COMPANY	C2015-3 Component side

Are the resistances less than 5 ohms?

Yes

GO to B2

INSTALL a new parking brake switch. REFER to: Parking Brake Switch . To restore parking brake switch functionality, CARRY OUT the following procedure; CYCLE the ignition from ON to OFF and back to ON. PLACE the parking brake switch in the APPLY position, then RELEASE the switch to the NEUTRAL position. PLACE the switch in the RELEASE position, then RELEASE the switch to the NEUTRAL position. REPEAT the procedure 1 time: PLACE the parking brake switch in the APPLY position, then RELEASE the switch to the NEUTRAL position. PLACE the switch in the RELEASE position, then RELEASE the switch to the NEUTRAL position.

B2 TEST THE PARKING BRAKE SWITCH IN THE RELEASED POSITION

With the parking brake switch in the released position (switch pushed down), measure:

Positive Lead	Measurement / Action	Negative Lead
C2015-4 (Component side)	Courtesy of FORD MOTOR COMPANY	C2015-7 (Component side)
C2015-6 (Component side)	Courtesy of FORD MOTOR COMPANY	C2015-3 (Component side)
C2015-5 (Component side)	Courtesy of FORD MOTOR COMPANY	C2015-8 (Component side)

Are the resistances less than 5 ohms?

Yes

GO to B3

B3 CHECK THE PARKING BRAKE SWITCH CIRCUITS FOR A SHORT TO GROUND

Disconnect ABS module C135.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2015-3	Courtesy of FORD MOTOR COMPANY	Ground
C2015-4	Courtesy of FORD MOTOR COMPANY	Ground
C2015-5	Courtesy of FORD MOTOR COMPANY	Ground
C2015-6	Courtesy of FORD MOTOR COMPANY	Ground
C2015-7	Courtesy of FORD MOTOR COMPANY	Ground
C2015-8	Courtesy of FORD MOTOR COMPANY	Ground

Are the resistances greater than 10, 000 ohms?

Yes

GO to B4

No	REPAIR the circuit.

B4 CHECK THE PARKING BRAKE SWITCH CIRCUITS FOR AN OPEN

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2015-3	Courtesy of FORD MOTOR COMPANY	C135-16
C2015-4	Courtesy of FORD MOTOR COMPANY	C135-32
C2015-5	Courtesy of FORD MOTOR COMPANY	C135-31
C2015-6	Courtesy of FORD MOTOR COMPANY	C135-9
C2015-7	Courtesy of FORD MOTOR COMPANY	C135-15
C2015-8	Courtesy of FORD MOTOR COMPANY	C135-10

Are the resistances less than 3 ohms?

Yes

GO to B5

No	REPAIR the circuit.

B5 CHECK THE PARKING BRAKE SWITCH CIRCUITS FOR A SHORT TOGETHER

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2015-3	Courtesy of FORD MOTOR COMPANY	C2015-4
C2015-3	Courtesy of FORD MOTOR COMPANY	C2015-5
C2015-3	Courtesy of FORD MOTOR COMPANY	C2015-6
C2015-3	Courtesy of FORD MOTOR COMPANY	C2015-7
C2015-3	Courtesy of FORD MOTOR COMPANY	C2015-8
C2015-4	Courtesy of FORD MOTOR COMPANY	C2015-5
C2015-4	Courtesy of FORD MOTOR COMPANY	C2015-6
C2015-4	Courtesy of FORD MOTOR COMPANY	C2015-7
C2015-4	Courtesy of FORD MOTOR COMPANY	C2015-8
C2015-5	Courtesy of FORD MOTOR COMPANY	C2015-6
C2015-5	Courtesy of FORD MOTOR COMPANY	C2015-7
C2015-5	Courtesy of FORD MOTOR COMPANY	C2015-8
C2015-6	Courtesy of FORD MOTOR COMPANY	C2015-7
C2015-6	Courtesy of FORD MOTOR COMPANY	C2015-8
C2015-7	Courtesy of FORD MOTOR COMPANY	C2015-8

Are the resistances greater than 10, 000 ohms?

Yes

GO to B6

No	REPAIR the circuit.

B6 CHECK THE PARKING BRAKE SWITCH CIRCUITS FOR A SHORT TO VOLTAGE

NOTE: Performing this step sets Diagnostic Trouble Codes (DTCs) in the ABS module.

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2015-3	Courtesy of FORD MOTOR COMPANY	Ground
C2015-4	Courtesy of FORD MOTOR COMPANY	Ground
C2015-5	Courtesy of FORD MOTOR COMPANY	Ground
C2015-6	Courtesy of FORD MOTOR COMPANY	Ground
C2015-7	Courtesy of FORD MOTOR COMPANY	Ground
C2015-8	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage present?

Yes	REPAIR the circuit.

GO to B7

B7 VERIFY ALL WIRING CONNECTIONS

Ignition OFF.

Disconnect in-line connectors between the ABS module and the parking brake switch.

Using a good light source, inspect ABS module C135, parking brake switch C2015 and all related in-line connectors for the following:
- corrosion - install new connector or terminal and clean the module pins
- damaged or bent pins - install new terminals or pins
- pushed-out pins - install new pins as necessary
- spread terminals - install new terminals as necessary

Are the connectors free of corrosion, damaged pins, bent pins, pushed-out pins and spread terminals?

Yes

GO to B8

No	REPAIR the connector or terminals. Refer to OEM Electrical Wiring Diagram Introduction for schematic and connector information.

B8 CHECK FOR CORRECT ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OPERATION

Connect ABS module C135 and all related in-line connectors. Make sure they seat and latch correctly.

Connect parking brake switch C2015. Make sure it seats and latches correctly.

Ignition ON.

Perform the following steps to restore parking brake switch functionality:
- Place the switch in the APPLY position.
- Release the switch to the NEUTRAL position.
- Place the switch in the RELEASE position.
- Release the switch to the NEUTRAL position.
- Repeat the 4 steps.

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

Is the concern still present?

Yes	CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) exist for 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 a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.