2004 MAXIMA AND QUEST; ENGINE WILL NOT …

1 1/8 Classification:Reference:Date:EL03-007 NTB03-031 April 3, 20032004 MAXIMA AND QUEST; ENGINE WILL NOT STARTNVIS/NATS system DESCRIPTION / KEY REGISTRATIONAPPLIED VEHICLES:2004 MAXIMA (A34)2004 Quest (V42)SERVICE INFORMATION This bulletin covers a new version of the Nissan Vehicle Immobilizer system /NissanAnti-Theft system (NVIS/NATS). This system , referred to as NATS , is standardequipment on the 2004 MAXIMA and 2004 Quest. This new version of NATS uses advanced anti-theft functions which are passwordprotected . This helps prevent unauthorized access into the NATS registrationprocedure. To obtain the password from ASIST, CONSULT-II is used to pull up the "BCM-specific"5-digit number (PIN) code. Unlike earlier systems, if the Electronic Control Unit (ECM) is replaced for the 2004 MAXIMA or 2004 Quest, NATS DOES NOT need to be : The ECM and Body Control Module (BCM) do work together, but the BCM nowcontrols the information necessary to tell the ECM to start the : The New NATS Control Unit (C/U) Initialization and Key registration Procedure in this bulletin is for the 2004 MAXIMA and 2004 Quest.

2 Do not use thisprocedure on earlier NATS-equipped BLUE transponder chip holderPrevious Models NATS Ignition Key2004 MAXIMA /Quest Ignition KeyTP020275bBLACK transponder chip holderFigure 12/8 system Components (see Figure 2) NATS ignition key (with transponder chip). NATS antenna amplifier, located around the ignition key cylinder. Body Control Module (BCM) ENGINE Control Module (ECM) Security indicator (Light Emitting Diode, or LED), located on the 2 system Operation The NATS uses a digital radio frequency (RF) to transmit a key code between the NATSkey ID chip (which is embedded in the NATS ignition key) and the BCM. When a registered NATS key transmits a valid (good) key code, the BCM will send asignal to the ECM which will allow the ENGINE to start.

3 If the key doesn t send the correct code, the BCM will not transmit a valid code to theECM. So the ECM will not let the ENGINE Service Notes:Key registration Required NATS will not allow the ENGINE to start without the use of a registered ignition key. Previous and current Nissan models with NATS have a Key chip in the ignition keyhead (see Figure 1, page 1.) If a vehicle will not start and the Dash Security lamp is ON solid, it is possible that theignition keys were not properly registered into the vehicle's Body Control Module (BCM).BCMECMS ecurity indicator (LED)TP020079 NATS antenna key3/8 When a NATS ignition key is replaced, a new key added, or the BCM is replaced,Control Unit (C/U) Initialization and Key registration MUST BE PERFORMED or THEVEHICLE WILL NOT START.

4 If a new ignition key(s) needs to be added or if any ignition key needs to be re-registered, ALL other ignition keys must be re-registered at the same time or they will nolonger start the Important Information When a NATS Key is manufactured, the NATS key code is permanently encoded to theNATS key ID chip. This code cannot be changed. It is recommend to use only Nissanservice parts (key blanks). NATS only allows the vehicle to start. It does not activate the vehicle theft warningsystem. Each vehicle is supplied from the factory with three registered NATS ignition keys. A maximum of five ignition keys can be registered to the If a NATS-equipped vehicle experiences an intermittent no start condition, another transponder could be causing interference (blocks the signal).

5 TP990654 Figure 3 In cases of interference from other keys or transponders, there will be a "DIFFERENCEOF KEY" code stored in the ENGINE Control Module (ECM). The MIL will not turn "ON"for this. Once the vehicle is started, transponder interference will not cause the ENGINE to stall. To avoid transponder interference, advise the customer to keep all othertransponders on separate key of the above: Other vehicle ignition keys that have transponders ( key operation) or transponders such as the Mobil Speedpass (seeFigure 3) may be a source of interference. They may be tooclose to the registered key (3/4 to 1 inch) that is being used tostart the PROCEDURENATS C/U Initialization With 4-Digit PIN Code and Key registration It is highly recommended that you read through the entire service procedure beforedoing it for the first step; Prepare1.

6 Collect all existing ignition keys from the : ANY KEYS THAT ARE NOT REGISTERED AT THIS TIME WILL NO LONGERSTART THE Separate all NATS ignition keys and other transponders away from each other (takethem off the key ring). You must keep them separate during the whole key step; Get the BCM-specific 5-Digit Number Code1. Insert the NATS (purple) Program Card into slot A of the CONSULT-II (see Figure 4).Figure 42. Connect CONSULT-II to the vehicle s data link connector. Use the CONSULT-II CANconverter and cable set to do Insert a key into the ignition and turn the Ignition ON. Do Not start the Wait for the CONSULT-II system software to load , then select the following on theCONSULT-II screen:START > OTHER > OK > NATS BCM or S/ENT > PIN READ(CONSULT-II will display and print the BCM-Specific 5-digit code.)

7 5. Take the printout and go to an ASIST terminal to decode the BCM-Specific sure card is fully seatedInsert card into slot A (top)5/83rd step; Decode the number1. From the ASIST Main Menu screen, click on Information Tool Box. CONSULT UtilitiesCONSULT UtilitiesLatest UpdatesDial UpdateNATS DecoderCampaignsCopy UtilityHelpMainMenuBack UpNEWTP020069 Click on"NATSD ecoder"buttonSM AmendmentsSearch by Ref. NoSearch by Ref. NoTool & EquipmentTool & EquipmentFigure 53. Follow the steps in Figure 6, Code**Please enter the 5-digit number from the BCM label (or IMMU label for '03 Q45 & M45) and press theGenerate Code NVIS (NATS)QuitClear**GenerateCodeGenerateCod eEnter the BCM-specific5-digit number from the CONSULT-II PIN "Generate Code"button2 Write down the 4-Digit Pin Code Number foruse in CONSULT-IINATS Key Registration3 Figure 6 NOTES: The letter O is not used in the 5-digit number code.

8 Anything that looks like an O is really the number zero 0 .2. From the Information Tool Box screen,click on NATS Decoder button(see Figure 5).6/84th step; C/U Initialization Procedure1. Select BACK twice on the CONSULT-II screen. It should return to the SELECTSYSTEM Select NATS V Touch C/U INITIALIZATION .4. On the CONSULT-II IMMU INITIALIZATION touch screen, type in the 4-digit PINCode Number that you wrote down from ASIST IVIS/NVIS (NATS) screen(step 3, page 5).5. Touch START on CONSULT-II to perform C/U When C/U INITIALIZATION is complete:a. INITIALIZATION COMPLETED will be displayed on the IMMU Turn key to the "OFF/LOCK" position and pull it WAIT AT LEAST 5 Go to 5th step; Key : The key that you just used is NOT registered step; Key Registration1.

9 Insert the first key to be registered into the ignition and turn the key to the "ON" not start the Wait at least 5 seconds (the Security Lamp will flash 5 times, then it will stop). Turn the key to "OFF/LOCK", remove it and set it aside, separate from all theother : Keep this first REGISTERED key separate from ALL the otherUNREGISTERED keys for right now. DO NOT MIX UP KEYS! (see NOTE, nextpage)7/8 NOTE: The first registered key will be used later in step 4 (below). Keep the "registered" keys and the "unregistered" keys in different piles duringthis process. Accidentally inserting an already registered key into the ignition at this point willdrop the system out of the registration mode. If this happens you will have to start all over again. Go back to #1 of 4th step;C/U Initialization and restart from Repeat steps 1 and 2 (above) for all remaining "unregistered" keys.

10 Remember, a maximum of five keys can be registered into the After registering and removing the last key; Re-insert the first registered key and turn the key to the ON position for 5 seconds. This will take the system out of the key registration : the Security Lamp will not flash during this 5 second period5. Turn the key to the "OFF" Wait for the Security Lamp to start blinking (approximately 5 seconds). This indicates the completion of Key ID registration and C/U Initialization. Proceed to Key Confirmation (Step 6).NOTE: On the CONSULT screen: if INITIALIZATION STOPPED or INITIALIZATION FAIL isdisplayed on CONSULT-II during the above procedure:A. Repeat 2nd step: Get the BCM-specific 5-Digit Number Code B. Repeat 3rd step: Decode the Number This is to confirm that you wrote down the correct BCM-specific 5-digit number code and generated /wrote down the correct 4-digit PIN Code Turn the ignition switch OFF , then ON.