B2607

Code

Generic B — Body

Wireless Door Lock Receiver Circuit Fault

Brand: Generic

Type: B — Body

Views: UK: 13 EN: 14 RU: 14

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Page language: EN

Verify key fob battery voltage (expected ~3.0 V for coin cell).
Check vehicle battery and charging system voltage (11–14.5 V operating range).
Scan BCM for B2607 and any related codes, note freeze frame and occurrence count.
Inspect fuses and fusible links for receiver/BCM circuits.
Visually inspect wiring, connectors and antenna for damage or corrosion.
Verify power and ground at the receiver/antenna connector with DMM.

Key fob battery: ~3.0 V (coin cell).
Vehicle supply: 9–16 V while starting; normal operating 11–14.5 V.
Receiver power feed: battery/ignition feed voltage present at connector when expected.
Receiver ground:
RF carrier: typical remote frequencies ~315 MHz (NA) or 433.92 MHz (EU/Asia); RF amplitude varies by design — presence of RF only detectable with appropriate test equipment (spectrum analyzer/RF probe).
CAN/LIN/serial: receiver or BCM may report RF events on vehicle network — check for expected network messages when fob pressed.

Confirm the symptom: attempt lock/unlock with known good key fob and spare if available; note behavior and distance.
Check for other DTCs and record freeze‑frame data with a capable scan tool.
Verify key fob battery voltage and replace coin cell if low; retest functionality.
Inspect fuses related to BCM/receiver; replace any blown fuses and retest.
Visually inspect receiver and antenna harness, connectors and grounds; repair any corrosion, broken wires or loose terminals.
With connector attached, backprobe power and ground to confirm proper voltage and ground continuity at rest and during operation.
While pressing fob buttons, monitor receiver input or BCM status using a scan tool or oscilloscope to confirm pulses or network messages — absence indicates receiver or wiring fault.
If RF presence must be confirmed, use an RF detector/spectrum analyzer or known‑good receiver to verify carrier at the antenna input.
If wiring and power/ground are good but no valid signals are received, swap with a known‑good receiver/antenna (if available) or replace the receiver module per manufacturer procedure.
After repairs, clear codes, confirm proper remote operation from various distances and cycles, and re‑scan for reappearance.