B1332

Code

FIAT B — Body

Tailgate open circuit

Brand: FIAT

Type: B — Body

Views: UK: 2 EN: 5 RU: 4

AI status

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Page language: EN

Causes

Open or damaged wiring in tailgate harness (common at hinge area)
Faulty tailgate latch/switch or position sensor
Corroded or loose connector(s)
Poor ground or power supply to the sensor circuit
Blown fuse or poor fuse contact
Water ingress or contamination in switch/connector

Symptoms

Tailgate open/close warning message or lamp on dash
Interior/cargo lights remain on or do not turn on/off with tailgate
Central locking or remote tailgate release not working reliably
Battery draining overnight if interior lamps stay on
Chimes or warning siren when driving
Possible inability to close/lock tailgate properly

What to check

Use a scan tool to read the fault and live data for the tailgate position input.
Visually inspect tailgate latch, sensor, and connectors for damage, corrosion or water intrusion.
Inspect wiring through the tailgate hinge for broken conductors; flex the tailgate while monitoring behavior.
Check related fuses and the BCM power/ground circuits for correct voltage and tight connections.
Perform a backprobe/voltmeter check at the tailgate sensor connector while opening/closing the tailgate.
Check for other stored B-codes that may indicate broader BCM or wiring issues.

Signal parameters

Expected: discrete switch signal that changes state when tailgate opens/closes; exact polarity depends on design.
Typical voltage when closed: near 0–1 V (grounded switch) or near battery voltage if pull-up is used (~12 V).
Typical voltage when open: ~12 V (pulled high) or open-circuit/high impedance depending on design.
Resistance across a closed microswitch: close to 0 Ω; open switch: OL/infinite Ω.
Use OEM wiring diagram to confirm correct expected values for the specific vehicle.

Diagnostic algorithm

Connect a diagnostic scanner, read/record B1332 and any related codes, and monitor live tailgate position data while operating tailgate.
Visually inspect tailgate latch, harness, and connector; look for corrosion, loose terminals, broken wires, or water ingress.
With ignition on, backprobe the tailgate sensor connector and observe the signal while opening/closing the tailgate. Compare to expected behavior from wiring diagram.
Wiggle the harness at the hinge while monitoring the signal and live data to reveal intermittent breaks.
Measure continuity from the tailgate sensor connector to the BCM connector (with connectors disconnected) to confirm no open circuits or high resistance.
Check power and ground at the sensor connector (and fuses supplying the circuit). Repair any poor connections.
If wiring and connector are good, bench-test or replace the tailgate latch/sensor assembly and retest.
If fault persists after replacing sensor and repairing wiring, inspect BCM connector and grounds; consider BCM diagnostics or replacement as last resort.
After repair, clear codes and confirm proper operation over several cycles, plus verify no recurrence of B1332.

Likely causes

Broken wires where harness flexes at tailgate hinge
Failed tailgate latch microswitch or position sensor
Corroded pins at tailgate connector
Open ground or supply to the tailgate sensor circuit
Intermittent connector due to water/dirt

Fault status

⚠️ Status

Stored when the tailgate open/close detection circuit presents an open or invalid signal to the Body Control Module. May log as active (current) or historic, and can affect interior lighting, central locking, and warning messages.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2 hours

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