F 450 2WD Super Duty V8-6.0L DSL Turbo VIN P (2006)
A2-A3
Test B: DTCS B1317 and B1318 - Battery Voltage High/Low
PINPOINT TEST B: DTCs B1317 AND B1318 - BATTERY VOLTAGE HIGH/LOW
Normal Operation
The braking energy that is provided to the trailer from the trailer brake control (TBC) module is varied with a pulse width modulated (PWM) signal
that switches between 0 volt and battery voltage, the higher the duty cycle the more braking power available. For normal operation, the fused battery
supply to the TBC module must be between 9 and 16 volts. If the voltage falls below or goes above these parameters, the appropriate DTC will be
set. The TBC module receives fused battery power from central junction box (CJB) fuse 101 (30A) along circuit 50 (RD) and fused ignition power
from CJB fuse 28 (10A) along circuit 298 (VT/OG). The ground path for the TBC is along circuit 206 (WH).
Possible Causes
^
Fuse(s)
^
Circuit open
^
Corrosion
^
Pushed-out pins
^
TBC module
