B1484

Code

Other B — Body

Brake Pedal Input Open Circuit

Brand: Other

Type: B — Body

Views: UK: 23 EN: 115 RU: 33

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Page language: EN

Read and record all stored codes and freeze frame data with a scan tool
Confirm the code is current vs. historic; attempt to reproduce the code
Visually inspect the brake pedal switch, connector and harness for damage or corrosion
Wiggle test wiring while observing live data for the brake pedal input signal
Check fuses and power/ground supplies to the switch and module
Backprobe the switch connector to observe voltage or signal while operating pedal

Simple mechanical switch type: open (OL) = no continuity when released; closed ≈ 0 Ω when depressed; signal typically battery voltage or ground switched to module
Electronic/Hall-type sensor: output typically 0–5 V depending on pedal position (refer to vehicle data)
Expected idle (released) state: either 0 V or battery voltage depending on design — verify against vehicle-specific wiring diagram
Expected activated state (pedal depressed): opposite logic level of released state (switches between ~0 V and ~12 V) or a change in 0–5 V for sensors
Typical fault indication: open circuit (infinite resistance) or no change in the expected signal when pedal is actuated

Verify code and freeze frame with a scan tool. Note whether fault is stored as open/short or intermittent.
Visually inspect the brake pedal switch, bracket, and wiring for physical damage, corrosion, or loose connector.
With ignition on, backprobe the switch connector and observe live data/voltage while operating the brake pedal. Note the resting and activated values.
If no signal present, check for fuse(s) and power/ground at the switch connector. Repair any missing power/ground.
Test continuity between the switch and the receiving module connector with ignition off; repair any open circuits.
If wiring appears OK but the signal does not change with pedal movement, bench-test or temporarily jumper the switch to confirm downstream module reacts (use correct logic: ground or 12 V).
Replace the brake pedal switch if it fails the bench/continuity or live-signal tests. Use OEM or equivalent part and ensure correct adjustment.
Repair any damaged wiring or corroded connectors. Secure harness to prevent future flex failure at pedal pivot.
Clear codes and retest / road test to confirm the fault does not return and related systems operate normally.
If the switch and wiring are good but the code returns, suspect module input fault and perform module-level diagnostics or replacement per factory procedures.