Help! please: i need wiring diagram and if it has a transponder or passlock . thanks in advance.
That car has a transponder and you will need a 555U. This is for a 2002 but I'm sure it will help you considerably.
| ITEM | WIRE COLOR |POL| WIRE LOCATION |
| 12V|green |+ |ignition harness |
| STARTER|BLACK / YELLOW |+ |ignition harness |
| SECOND STARTER|GREEN/ YELLOW |+ |ignition harness |
| IGNITION|BLACK/ white |+ |ignition harness |
| SECOND IGNITION|RED / yellow |+ |ignition harness |
| ACCESSORY|WHITE/ blue *1 |+ |ignition harness |
| POWER LOCK|yellow |- |*3 |
| POWER UNLOCK|yellow/red *7 |- |*3 |
| LOCK MOTOR|blue | |*3 |
| UNLOCK MOTOR|GREEN / WHITE | |*3 |
| DISARM DEFEAT|blue/red | |*3 |
| PARKING LIGHTS +|blue/red | |steering column |
| HEADLIGHTS|red, RED / blk *5 |+ |steering column |
| DOOR TRIGGER|*4 |- |*4 |
| HOOD PIN|BLACK/ pink |- |*3 |
| FCTRY ALARM ARM|arms with lock | | |
|FCTRY ALRM DISARM|disarms with unlock | | |
| DISARM NO UNLOCK|*8 | | |
| TACHOMETER|pink/blue or black | |instrument cluster or ECM *2|
| SPEED SENSE|dk. GREEN/ black |2 |ECM *2 |
| BRAKE WIRE|BROWN / red |+ |brake pedal switch |
| HORN TRIGGER|lt grn/red or brown |- |steering column |
| WIPERS|*6 |- |steering column |
| LF WINDOW UP/DN|blue - blu/blk |A |at drivers door switch |
| RF WINDOW UP/DN|blu/yel - blu/wht |A |at drivers door switch |
| LR WINDOW UP/DN|grn/red - grn/yel |A |at drivers door switch |
| RR WINDOW UP/DN|grn/wht - grn/blk |A |at drivers door switch |
Notes:
*1 Not required for remote start. *2 The ECM is located below the heater box to the right of the accelerator pedal, behind trim panel. The tach is in the top row, 3rd pin left of center of the plug. The VSS is in the 2nd row from the top, 4th pin right of center. *3 Located at the Smart Entrance Control Unit above the hood release in the drivers kick panel. The door lock wires only meter when turn the key in either door key cylinder. *4 On vehicles without power door locks use RED / black at any door switch or also found in the driver A pillar. Vehicles with power door locks use GREEN/ red for the driver door, GREEN/ black for the front passenger door, and RED / black for the rear doors. All found at the smart entrance control unit, use all three and diode isolate each. *5 These wires are for the low beams. For the high beams use RED / green(+) and RED / white(+) at the same location. *6 Use WHITE/ blue for intermittent, WHITE/ red for low, and blue/white high. *7 Requires a double pulse. *8 A single pulse to the unlock wire will disarm the factory alarm without unlocking the doors.
Xterras don't have transponders. One of the few Nissans that don't. Passlock is a GM thing. Really easy vehicle to do.