Code
P1696
HONDA
P — Powertrain
Traction Control Fuel Cut Signal Low Input
Views:
UK: 28
EN: 62
RU: 76
AI status
Completed
Completed
100%
Causes
- Open, short to ground, or corrosion in the fuel-cut signal wiring between the ECM and traction-control module
- Poor or missing ground(s) or low battery/system voltage
- Faulty connector or pin (bent, pushed out, corroded)
- Blown fuse or relay affecting the circuit or control power
- Faulty ECM/PCM or traction-control/ABS control module
Symptoms
- Traction Control/System indicator or ABS light illuminated
- Reduced or disabled traction control functionality during wheel slip
- Possible engine check MIL (SES) lamp
- Loss of expected fuel-cut behavior during deceleration/engine braking events
- Intermittent fault occurrence (may be present only under certain conditions)
What to check
- Read freeze frame/live data and confirm P1696 active; record related codes and battery voltage
- Visually inspect connectors and wiring at ECM and traction-control/ABS module for damage or corrosion
- Verify fuses and relays for ECM and traction-control/ABS circuits
- Backprobe and measure the fuel-cut signal voltage with key ON and engine running
- Check for continuity to ground and for shorts to battery voltage on the signal wire
- Perform wiggle test on harness while monitoring signal for intermittent changes
Signal parameters
- Typical system: single-wire switched logic referenced to vehicle battery (0–12 V range)
- Expected inactive level: near battery voltage (~10–14 V) on many Honda systems
- Expected active/fuel-cut level: pulled low (
- Fault/trip condition: persistent low or open-circuit when the module expects high, or voltage outside these expected thresholds
Diagnostic algorithm
- Connect a professional scan tool. Read and record all stored and pending codes, freeze-frame data, and live data for the fuel-cut signal input.
- Verify vehicle battery condition and charging system voltage; low system voltage can cause false inputs.
- Visually inspect connectors and wiring at both the ECM and traction-control/ABS module. Repair any damaged terminals or connectors.
- Locate the fuel-cut signal wire using the wiring diagram. Backprobe the connector with key ON and engine OFF; measure voltage and compare to expected inactive level.
- Start engine and reproduce conditions that would normally cause fuel cut (deceleration or commanded cut in diagnostic mode). Monitor the signal; note voltage transitions and timing.
- If signal is stuck low or intermittent, check continuity from traction-control module connector to ECM connector and to ground/battery as appropriate. Look for shorts to ground or open circuits.
- Wiggle harness and connectors while monitoring to find intermittent faults. Repair any wiring harness faults and clean/replace corroded connectors.
- If wiring, connectors, fuses, and grounds check good, follow manufacturer procedures to test the ECM and traction-control/ABS module. Reprogram or replace modules only after confirming wiring integrity.
- After repairs, clear codes and perform road test/diagnostic procedure to verify the fault does not return.
Likely causes
- Damaged wiring or poor connector at the fuel-cut signal circuit
- Corroded or loose ground for ECM or traction-control module
- Intermittent connection (wiggle-susceptible) at harness or module
- Faulty traction-control module interpreting signal incorrectly
- ECM not driving the signal due to internal fault or power issue
Fault status
Status
Traction control module detects low or invalid fuel-cut request signal from the engine control module (P1696). Check wiring, connectors, power/ground, and modules.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
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