Pinpoint Test A: DTC B1483 - Brake Pedal Input Open Circuit

CAUTION: The Flex Probe Kit must be used for all test connections. Use of standard multi-meter probes may damage wiring terminals

A1 CHECK THE STOPLAMP
- Apply the brake pedal while observing the stoplamp.
- Do the stoplamp illuminate?
1. YES : Go to A2.
2. NO : REFER to EXTERIOR LIGHTING to continue diagnosis of the stoplamp.
A2 CHECK CIRCUIT CES09 (VT/OG) FOR AN OPEN
- Key in OFF position.
- Disconnect: ABS Module C135
- Measure the voltage between ABS module C135-6, circuit CES09 (VT/OG), harness side and ground with the brake pedal released.
- Is the voltage greater than 10 volts?
1. YES : Go to A3.
2. NO : For early build Fusion/Milan, VERIFY fuse 44 (15A) is OK. For all MKZ and late build Fusion/Milan, VERIFY BJB fuse 49 (15A) is OK. If OK, REPAIR circuit CES09 (VT/OG). CLEAR the DTCs. REPEAT the self-test.
A3 CHECK FOR CORRECT ABS MODULE OPERATION
- Disconnect the ABS module connector.
- Check for:
  - corrosion.
  - pushed-out pins.
  - spread terminals.
- Connect the ABS module connector and make sure it seats correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
1. YES : INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module . CLEAR the DTCs. REPEAT the self-test.
2. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.