Code
P1180
DAIHATSU
P — Powertrain
G sensor 2 open or short circuit
AI status
Completed
Completed
100%
Causes
- Open circuit in G sensor 2 wiring (broken wire, connector pin out)
- Short to ground or short to battery voltage in the sensor signal or supply circuit
- Corroded, loose or contaminated connector at the sensor or ECU
- Failed G sensor (internal short or internal open)
- Poor ground or reference supply to the sensor
- Damage from water ingress, impact, or previous repair
Symptoms
- Malfunction Indicator Lamp (MIL) / CEL illuminated
- Stability/traction control warnings or reduced functionality (if system uses G sensor)
- Reduced or erratic throttle/acceleration response in systems that use G input
- Logged freeze-frame data showing abnormal or missing G sensor values
- Intermittent faults that may clear with movement of wiring/harness
What to check
- Read freeze-frame and all stored codes with a scan tool; record live G sensor data and compare to expected values
- Check for additional related codes (ECU, ABS, TCS)
- Visually inspect sensor, connector, and wiring for damage, corrosion, pin push-out, or water ingress
- Wiggle-test wiring and connector while monitoring live data to reproduce the fault
- Backprobe the sensor connector and measure supply voltage, signal voltage, and ground continuity with a multimeter
- Inspect/measure continuity and resistance between sensor ground and vehicle chassis ground
Signal parameters
- Typical reference supply: ~5.0 V (varies by model)
- Typical signal idle/0G output: approx. mid-rail (~2.5 V) — should vary smoothly with applied G
- Expected signal range: ~0.5–4.5 V depending on sensor design
- Sensor supply resistance: should not be open; infinite ohms indicates open circuit
- Ground continuity: near 0 ohms to chassis ground
Diagnostic algorithm
- Retrieve P1180 and any related codes; note freeze-frame and live G sensor values.
- With ignition ON (engine off), inspect connector for corrosion, bent pins, or water. Repair or replace connector if needed.
- Backprobe connector: verify reference supply voltage (≈5V) to sensor, verify good ground, and measure signal voltage. If supply or ground missing, trace wiring to ECU.
- If supply and ground are correct but signal is open/short, check wiring continuity between sensor and ECU pins for open circuit or short to ground/12V. Repair any damaged wiring.
- Wiggle harness while monitoring live data to find intermittent breaks. Secure, repair or replace harness sections as required.
- If wiring checks good, substitute a known-good G sensor (if available) and re-test.
- After repair or replacement, clear codes, perform a test drive or reproduce conditions to confirm the code does not return.
- If fault persists after sensor and wiring verified/replaced, consider ECU-side fault and consult dealer-level diagnostics or wiring repair manuals.
Likely causes
- Wiring chafed at harness flex point (doors, engine mounts)
- Connector terminals pushed out or bent from servicing
- Sensor exposed to water/oil causing internal failure
- Aftermarket work disturbed the harness or connector pins
Fault status
Status
P1180 - G SENSOR 2 OPEN OR SHORT CIRCUIT (DAIHATSU)
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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