Obd system malfunctin indicator lamp is on how i can fix it?

you need to check the bulb in the dash see if its good check for power at the plug for the obd

Fix the problem that is turning on the light.

You have an OBD Malfunction Indicator Lamp on
or flashing

The procedure has been the same for 30 years

Check for codes & diagnose the system & components
within, that the codes points to

After code related issues are resolved, work on preventative
maintenance items & other problems

1132: Leaking fuel injector bank 1
- EGR stuck open
- Engine mechanical condition

1152:
Oxygen sensor rich,
Some vehicles built prior to june 8, 2001 may exhibit a cold engine rough idle and / or a malfunction indicator lamp light with diagnostic trouble codes p0171, p0174, p1132, and p1152 in memory.

ALL MIL Lamps are the same
(OBD Malfunction Indicator Lamps)

Check for codes
Diagnose System with problems
Resolve/Repair

ABS -- is the electronic part of your braking system

Need to have that system diagnosed at a repair shop
Not much you can do at home

Same as an other System Malfunction Indicator Lamp

Check for codes
Diagnose System
Repair

This same proceedure has been in place
for 30 years now,that's when OBD1 &OBD 2
came along

malfunction indicator lamp or MIL, means that something is out of specifications from what is expected by the computer.

Have the car scanned with an OBD-II compliant scanner that covers 1996 and up vehicles.

You can buy your own at Walmart or Sears for under $100.

there is a emission system recall for these codes for your year and model contact the Nissan dealer, it is a no charge repair.
here is the summary of that recall

MALFUNCTION INDICATOR LAMP ON WITH DIAGNOSTIC TROUBLE CODE P0300-P0306, P1273 OR P1283. *TT *SC
Make : NISSAN Model : QUEST Year : 2004
Manufacturer : NISSAN NORTH AMERICA, INC.
Service Bulletin Number : 04028A Date of Bulletin : MAR 24, 2004
NHTSA Item Number : 10005976
Component : ELECTRICAL SYSTEM
Summary :
MALFUNCTION INDICATOR LAMP ON WITH DIAGNOSTIC TROUBLE CODE P1031, P1051, P1148, P1168 (A/F SENSOR HEATER / CLOSED LOOP) ON 5 SPEED AUTOMATIC TRANSMISSIONS ONLY. (THIS VERSION SUPERSEDES NTB04-028.) *TT

P0650 Malfunction Indicator Lamp (MIL) Control Circuit Malfunction

Malfunction Indicator Lamp (MIL) is located on the instrument panel. When the ignition switch is turned ON without engine running, MIL will light up. This is a bulb check. When the engine is started, MIL should go off. If MIL remains on, the on board diagnostic system has detected an engine system malfunction.

Possible Causes:

Harness or connectors (MIL circuit is open or shorted.)

MIL bulb may be faulty

your owner manaul has it. your fuse cover should have chart too.

here is 96 tracer. You also have main fuses under hood.

INTERIOR FUSE JUNCTION PANEL REFERENCE CHART Fuse Fuse Rating Color Protected Components (REAR WIPER) 10A Red Rear wiper and washer motors, heater and A/C relays, daytime running lamps control (Canada), climate control assembly panel illumination HAZARD 15A Blue Front and rear turn signal lamps, turn signal indicator lamp, indicator flasher ROOM 10A (1.9L)
15A (1.8L) Red
Blue Dome and map lamps, safety belt warning chime, ignition key illumination, luggage compartment lamp, vanity mirror lamp, radio chassis (memory), power door lock relay, shift interlock system, powertrain control module (PCM), radio amplifier (memory) ENGINE 15A Blue Fan control (FC) relays, PCM relay RADIO 15A Blue Radio chassis, radio amplifier, remote control mirror, instrument panel illumination (DOOR LOCK) 30A Light Green Power door lock actuators BELT 30A Light Green Passive restraint control module, passive restraint motors (POWER WINDOW) 30A Light Green Window regulator electric drives METER 15A Blue Instrument cluster, backup lamps, rear lamps, speed control system, shift interlock system, safety belt warning chime, passive restraint control module, hazard flasher, PCM (1.8L Canada) WIPER 20A Yellow Windshield wiper motor and windshield washer pump STOP 20A Yellow Stoplamp, horn (1.9L only), rear hi-mount lamp TAIL 15A Blue Parking lamps, cornering lamps, rear lamps, license lamps, compartment lamp, instrument panel illumination (SUN ROOF) 15A Blue Sliding roof panel motor ABS 10A Red Anti-lock brake system (ABS) (1.8L only) (DEFOG) 20A Yellow Rear window defroster HEATER 30A
circuit breaker — A/C blower motor HO2S
(ON INTERIOR FUSE JUNCTION PANEL SIDE) 10A (1.9L)
20A (1.8L) Red
Yellow Heated oxygen sensor (HO2S) CIGAR
(ON INTERIOR FUSE JUNCTION PANEL SIDE) 20A Yellow Cigar lighter knob and element CIGAR 20A Yellow Cigar lighter OBD II 10A Red Data link connector #2 BLOWER 30A Light Green Blower motor relay HORN 20A Yellow Horn (1.8L only)