1Safety: Keep owner checks outside the steering-column wiring. Do not force a key or probe airbag connectors. Column and electrical testing belongs with a qualified technician using the exact-year Nissan precautions.
source 2Note whether the key turns, whether the engine cranks, and the ignition position when the security light is on. — Observation and your owner’s manual
Good: Blinking with the ignition OFF, LOCK or ACC is normal; it is not a failed-part diagnosis.
If not: If the key will not turn, arrange a separate key/lock inspection. If it turns but the engine will not start, continue below.
source 3Separate other transponder keys and toll/payment tags from the ignition key. Follow the interference-restart instructions in your vehicle’s owner’s manual and note whether the registered spare behaves differently. — Registered ignition key and registered spare, if available
Good: Starting after removing interference can avoid an unnecessary parts purchase.
If not: If neither key starts the engine, stop repeated attempts and arrange diagnosis. That result alone does not prove an antenna or control-unit failure.
source 4Technician: save the complete fault report and identify which module reports each fault before clearing anything. Confirm the exact-year NATS diagnostic result. — Nissan CONSULT or confirmed equivalent ECM and NATS coverage
Good: P1610 identifies lock mode; P1614 identifies a key-ID reception problem. Neither names the part to buy.
If not: If other faults are present, follow their appropriate diagnostic branches rather than assuming every no-start is caused by the antenna.
source 5Technician: on a 2005-2008 no-start with P1610 as the only NATS code, follow NTB10-107 battery voltage/state-of-charge testing and service the battery if required. An unloaded voltage reading alone can miss the problem. Confirm starting after the directed fault clearing. Other NATS codes or an unresolved no-start need the applicable factory diagnosis. The bulletin says that if the security indicator is off during or after cranking, follow non-NATS no-start diagnosis instead of replacing NATS components. — Nissan-specified GR-8 battery test/service equipment or validated applicable equivalent
source 6Technician: for confirmed P1610, use the factory lock-mode recovery procedure with a registered key. For confirmed P1614, inspect antenna installation and follow the key-read circuit diagnosis. — Exact-year Nissan service information
Good: The lock-mode branch and key-read branch are separate; successful starting after recovery is recorded rather than treated as proof of a failed module.
If not: If starting does not recover, continue the exact factory diagnostic path. Do not buy a steering lock from P1610 or P1614 alone.
source 7Technician: verify antenna installation, power, signal and ground using the procedure matching the year and connector. Repair a confirmed connector or wiring fault, or replace the component isolated by the completed tests. — Factory wiring diagram and specified electrical test equipment
Good: A measured circuit fault is distinguished from a key or module fault. This summary does not substitute generic battery-voltage or coil-resistance values for the factory checks.
If not: If results or diagram labels are unclear, obtain the correct service information before a replacement decision. Do not guess from a code or a failed spare-key attempt.
source 8After the confirmed repair, complete any required key registration or control-unit initialization and verify starting with the owner’s registered keys. Bring all keys to the service visit. — Nissan-capable registration equipment when the repair requires it
Good: Starting is restored and the relevant fault does not recur during verification.
If not: If it returns, preserve the new fault report and continue diagnosis; do not treat code clearing as a repair.
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