Engine-Codes.com | All About OBDII Engine Codes
Engine-Codes.com | All About OBDII Engine Codes

P1612 Nissan

P1612 Nissan - Chain of ECM-IMMU

PDF
P1612 Nissan Comments |  Add Comment
Possible causes
- Faulty or not programmed ignition key
- Faulty IMMU
- Faulty Engine Control Module (ECM)
Help with Possible causes What does this mean?
Tech notes
This code is usually triggered when a not registered or damaged key is used to start the engine. When the starting operation is carried out five or more times consecutively with the same unregistered key, the system will lock.

If the problem occurs try disconnecting the car battery for about 30 minutes and then try starting the engine with a known registered key. If the problem persist you have to have the dealer erase the code and reprogram the keys again.
Help with Tech Notes What does this mean?
When is the code detected?
Communication impossible between ECM and IMMU (In rare cases, “CHAIN OF ECM-IMMU” might be stored during key registration procedure, even if the system is not malfunctioning.)
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Engine would not start
P1612 Nissan Description

An immobilizer is an electronic device fitted to an automobile which prevents the engine from running unless the correct key is present. This prevents the car from being hot wired after entry has been achieved.

The microcircuit inside the key is activated by a small electromagnetic field which induces current to flow inside the key body, which in turn broadcasts a unique binary code which is read by the automobile's Engine Control Module (ECM). When the ECM determines that the coded key is both current and valid, the ECM activates the fuel-injection sequence.

The immobilizer function of the Nissan Vehicle Immobilizer System (NVIS) or Nissan Anti-Theft System (NATS) consists of the following:

- NATS ignition key

- NATS antenna amp. located in the ignition key cylinder

- Body control module (BCM) or (IMMU)

- Engine Control Module (ECM)

- Security indicator lamp

OBDII Code P1612 Nissan - Chain of ECM-IMMU
Need more help?
Do you need more help with the P1612 Nissan code? ask a question to our users or search the top hand picked automotive forums for more information


(You will add more details to the question in the next step)
or
Need parts?
Need parts to fix this code? Search hundreds of stores at the same time and compare prices


Help Engine-Codes.com
Help us improve Engine-Codes.com. Leave a comment below or tell us if the information above help you fix the code. What are symptoms is your vehicle for the P1612 Nissan code? Have you replaced any parts?
Any information is appreciated. Thanks
Engine-Codes.com Comments Powered by Disqus
Google +
Engine Light ON?

The Engine-Codes.com ELM327 WiFi Car Diagnostic connects to your Android phone, iPhone, iPad, or Windows computer from your vehicle.
Ask OBDII Question