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Key Reader by-pass/short


TaffWest
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After removing steering column covers numerous times to access wiring for added guages etc i think i may have stuffed the Key reader. My screw driver slipped into key reader coil that surrounds the ignition when trying to pry out the metal ring around the ignition switch. Any way the vehicle will not start. Turns over fine but no ignition. As far as i know the key reader imobilises the ignition system somehow and has to send a signal to ECM once it is happy wth the key used to start the car.

 

Any one know how to test the key reader itself? Tested wiring to key reader 12 volts in brown wire (igntion off) Earth continuity black wire OK (ignition off). As per manual for vehicles after 2007.

Any one how to by pass key reader or if you can?

The imobiliser warning light on top of dash flashes as per normal.

When turning engine over light stays illuminated without flashing not sure if it should be off then or what.

 

Can anyone help?

 

 

 

 

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Light should go out I think once the key has been approved......I believe NATS can't be by-passed you need a new unit )reader/transponder than it needs to be reprogrammed by Nissan stealer.

 

"INTRODUCTION
The Nissan Anti Theft System (NATS) was introduced initially around 1995 with a basic
immobiliser, which did not use key transponders. This system was known as NATS 1.
Subsequently NATS 2 was introduced which uses the transponder technology.
Further iterations of the NATS system have been introduced, up to NATS 6.5. The earlier systems use a security timed
access, similar to Ford systems, which require a period of time before the keys can be programmed.
NATS 5 uses a pin code, as with GM and VAG systems. This system was fitted on vehicles from 2001 MY onwards.
A further development is the introduction of a CAN system that was first introduced on the Micra in 2003. The Micra system
comes in two forms either the Intelligent System or
Non-Intelligent system.
NATS IGNITION KEY
This uses standard transponder technology, and have both RED and BLUE chips to
identify non crypto and crypto type transponders. The BLUE chip types are fitted on the
latest NATS 5 system.
When programming keys, on NATS systems up to NATS 4, all keys stored in memory will be deleted, however on NATS 5
additional keys can be added. Up to 5 keys can be programmed into NATS 5 systems, and 4 keys into NATS 2,3 & 4
systems.
NATS IMMOBILISER UNIT
The NATS immobiliser unit, is normally mounted next to the ignition switch or behind the fascia area. The unit is
sometimes also fitted with a dongle unit, and is fitted on right hand drive European vehicles for extra security.
The NATS immobiliser controls signals to the Engine Control Module (ECM) which inhibit starting.
On later systems there is also an input from the Audio system, which if disconnected
inhibits the starting of the vehicle.
On CAN systems the immobiliser function is part of the Body Control Module (BCM), which controls signals to the Engine
Control Module (ECM) which inhibit starting.
NATS SECURITY INDICATOR
The security LED is normally mounted in the dashboard area and indicates the status of the system.
When a problem is detected, the LED will indicate the fault as listed in the following
table when the IGN is ON or in accessory position.

 

CONDITION
WITH DONGLE
ENGINE
CHECK
LIGHT
NATS LED
NATS FAULT (NO DONGLE
FAULT)
ENGINE CHECK
LIGHT
6FLASHES& ON
AFTER IGN IS
SWITCHED ON
ATS FAULT (DONGLE FAULT)
WITHOUT DONGLE
NATS LED
REMAINS ON FOR 15
MINUTES AFTER IGN
IS SWITCHED ON
NATS FAULT AND ENGINE
COMPONENT FAULT
LED ON
ENGINE FAULT
6FLASHES &
ON AFTER IGN IS
SWITCHED ON
LED ON
AFTER NATS PROGRAMMING
LED ON
LED ON
LED ON
LED ON
6 FLASHES

Cheers
 

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Took the key reader into work and one of our electronics guys found a break in the coil. He soldererd the joint. I had a job to see the wire which is enamel coated. He scraped the emamel back on the egdes and put a small piece in and soldered it under a bench magnifier.

 

Told me to fill coil with a neutral cure silocone to stop any vibration. Fitted it tonight and all good. Priced one from Nissan at over $300.  Nice to get a win now and then.

 

All the Best

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