B1335

Code

Other B — Body

Door Ajar RR Circuit Failure

Brand: Other

Type: B — Body

Views: UK: 21 EN: 38 RU: 24

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Page language: EN

Causes

Open or short in RR door-ajar wiring (harness through door hinge/boot)
Corroded, bent, or pushed-out connector pins at door or body harness
Faulty door latch or integrated door-ajar switch/sensor
Water intrusion/contamination in the door or connector
Poor ground at door or body harness
Faulty Body Control Module (BCM) or related module input

Symptoms

Door-ajar warning lamp or message for rear-right door
Interior dome light stays on or behaves incorrectly
Chime sounds or false door-open warnings
Battery drain if dome light remains on
Central locking may not operate correctly for that door
Code stored in BCM and possibly logged freeze-frame data

What to check

Read and record DTCs and any freeze-frame or related history using a scan tool
Monitor the rear-right door-ajar status with a scan tool while opening/closing the door
Visually inspect the door-hinge harness, rubber boot, and connectors for damage or corrosion
Perform a wiggle test on the wiring and connector while watching the scan tool for status changes
Inspect and clean connectors; check for pushed-out or bent pins
Check ground at door/latch and compare resistance to body/chassis ground

Signal parameters

Typical switch behavior: circuit closed (low resistance/near 0 Ω) when door is closed, open circuit when door is open — or vice versa depending on design
Expected voltage (typical): closed state ~0–1 V to ground, open state pulled up to ~5–12 V (depends on vehicle pull-up/reference)
Continuity: closed switch
Pull-up resistor present in module: typical range 5–50 kΩ (varies by manufacturer)
No or very low current draw from the input when in idle (signal input only), except when latch sensor is active

Diagnostic algorithm

Connect a scan tool, read and record B1335 and any related codes; note freeze-frame data and live door-ajar status.
With the vehicle powered, operate the rear-right door while observing the live input. Note if action produces a stable change or intermittent behavior.
Visually inspect the door hinge area, rubber boot, and both door and body connectors for damage, corrosion, pin displacement, or water ingress.
Perform a wiggle test: flex the harness through its full travel range while monitoring the door-ajar input on the scan tool to reproduce the fault.
Disconnect connectors (door and body side) and inspect pins; clean and repair any corrosion. Reconnect and recheck.
With connectors disconnected, check continuity between the latch sensor terminal and the BCM/input pin. Verify expected closed/open resistance with the latch actuated.
Backprobe the signal wire at the module/connector. Measure signal voltage with door open and closed and compare to expected ranges. If the vehicle uses a 5 V reference, verify reference is present.
If voltage or continuity is intermittent or out of range, repair/replace damaged wiring, pins, or the latch assembly. Re-seal boots to prevent water intrusion.
If wiring and latch check good, consult wiring diagrams and test the BCM input for correct pull-up/pull-down and module operation. Consider module software updates before replacement.
After repairs, clear codes, cycle doors and locks multiple times, and road-test or leave vehicle for soak testing to verify the fault is resolved and code does not return.