F 250 2WD Super Duty V10-6.8L (2009)
(WH/BN). The ground path for the TBC module is along circuit GD115 (BK/GY).
This pinpoint test is intended to diagnose the following:
-
Fuse(s)
-
Wiring, terminals or connectors
-
ABS module
-
TBC module
-
Customer trailer
PINPOINT TEST G: THE TRAILER BRAKES ARE INOPERATIVE
NOTICE: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multi-meter probes.
NOTE: Make sure the trailer brakes are electric-magnet actuated drum type brakes before proceeding with this pinpoint test.
-------------------------------------------------
G1 CHECK FOR ANY ABS MODULE DTCs
-
Connect the scan tool.
-
Ignition ON.
-
Enter the following diagnostic mode on the scan tool: Self Test - ABS Module.
-
Retrieve and record any ABS module DTCs.
-
Are any ABS module DTCs retrieved?
Yes
REFER to Antilock Brakes / Traction Control Systems. See: Antilock Brakes / Traction Control Systems/Testing and Inspection
No
GO to G2.
-------------------------------------------------
G2 CHECK THE TBC BRAKE ON/OFF (BOO_TBC) PID
-
Enter the following diagnostic mode on the scan tool: DataLogger - TBC Module.
-
Monitor the BOO_TBC PID while pressing and releasing the brake pedal.
-
Does the PID agree with the brake pedal position?
Yes
GO to G4.
No
GO to G3.
-------------------------------------------------
G3 CHECK THE PCM BOO PID
-
Enter the following diagnostic mode on the scan tool: DataLogger - PCM.
-
Monitor the BOO PID while pressing and releasing the brake pedal.
-
Does the PID agree with the brake pedal position?
Yes
REFER to Information Bus to diagnose the HS-CAN bus.
No
REFER to Brake Lamp to diagnose the stoplamp (BPP) switch. See: Lighting and Horns/Brake Lamp/Testing and Inspection
-------------------------------------------------
G4 CHECK THE VOLTAGE TO THE TBC MODULE
-
Ignition OFF.
