Pinpoint Test B: DTC B1483 - Brake Pedal Input Signal Failure: Overview

WARNING: This page is about a different car, the 2004 Mercury Mountaineer and 2004 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Use the flex probe kit for all test connections to prevent damage to the wiring terminals. Do not use standard multimeter probes.

B1 CHECK THE STOPLAMP OPERATION
- Key in OFF position.
- Observe the stoplamps while pressing and releasing the brake pedal.
- Do the stoplamps operate correctly?
Yes

GO to B2.

No

REFER to EXTERIOR LIGHTING to diagnose the stoplamps. Clear the DTCs. REPEAT the self-test.
B2 CHECK CIRCUIT 511 FOR AN OPEN
- Disconnect: ABS Module C155.
- Measure the voltage between the ABS module C155-41, circuit 511 (LG), harness side and ground while pressing the brake pedal.
  
  Fig 1: Measuring Voltage Between ABS Module C155-41, Circuit 511 (LG)
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
Yes

GO to B3

No

REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
B3 CHECK FOR CORRECT ABS MODULE OPERATION
- Disconnect all ABS connectors.
- Check for:
  - corrosion
  - pushed-out pins
- Connect all ABS connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes

INSTALL a new ABS module. refer to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE . TEST the system for normal operation.

No

The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self -test.