Hard Brake Pedal on Initial Start-Up – 2011-2012 Ford F-150

3.5L GTDI – INOPERATIVE, EXCESSIVELY NOISY VACUUM PUMP, HARD BRAKE PEDAL ON INITIAL START-UP AND/OR OPEN FUSE F64 IN THE BATTERY JUNCTION BOX

 

FORD:

2011-2012 F-150

 

ISSUE:

2011-2012 F-150 vehicles equipped with a 3.5L gasoline turbocharged direct injection (GTDI) engine can exhibit a hard brake pedal on initial start-up, an electric vacuum pump that is inoperative or excessively noisy and/or fuse F64 is open in the battery junction box (BJB).

 

ACTION:

Follow the Service Procedure steps to correct the condition.

SERVICE PROCEDURE

1. Does the vacuum pump operate?
   1. Yes – proceed to Step 2.
   2. No – proceed to Step 3.

2. Is the vacuum pump excessively noisy?
   1. Yes – proceed to Step 7.
   2. No – this procedure does not apply, refer to normal diagnosis.

3. Inspect fuse F64 in the BJB. Is the fuse open?
   1. Yes – replace the fuse and proceed to Step 4.
   2. No – proceed to Step 4.

4. Check for battery voltage at the vacuum pump connector C1560 pin 1 with the ignition key in the run position. Is battery voltage present?
   1. Yes – proceed to Step 5.
   2. No – this procedure does not apply. Repair the voltage supply circuit. Refer to the Wiring Diagram, Cell 42-1.

5. Disconnect the vacuum pump connector C1560. Check the resistance to ground at the harness connector pin 2 with the ignition key off. Is the resistance less than 5 ohms?
   1. Yes – proceed to Step 6.
   2. No – this procedure does not apply. Repair the ground circuit. Refer to the Wiring Diagram, Cell 5-1.

6. Inspect pins 1 and 2 in C1560. Are both pins clean and tight?
   1. Yes – proceed to Step 7.
   2. No – this procedure does not apply. Repair the wiring harness. Refer to the Wiring Diagram Cell 5-1.

7. Replace the vacuum pump and install the harness kit. Refer to the instructions provided in the harness kit.

 

PART NUMBER	PART NAME
CL3Z-9C490-D	Vacuum Pump Harness Kit
BL3Z-2A451-A	Vacuum Pump