Contents Section: Procedures All sections

Maintenance Information Isuzu Impulse II

Procedures 4 illustrations ~1268 words

VIN LOCATION

The Vehicle Identification Number (VIN) is located on the left side of the dash panel at the base of the windshield. The VIN chart explains the code characters.

VIN CODE ID EXPLANATION

Numbers preceding the explanations in the legend below refer to the sequence of characters as listed on VIN identification label. See VIN example below.

VIN Code ID Explanation. Scheme 2

Scheme 2: VIN Code ID Explanation

SEVERE & NORMAL SERVICE DEFINITIONS

Note. Use the Severe Service schedule if the vehicle to be serviced is operated under ANY (one or more) of these conditions

Service is recommended at mileage intervals based on vehicle operation. Service schedules are based on the following primary operating conditions

Normal Service

  1. Driven More Than 10 Miles Daily
  2. No Operating Conditions From Severe Service Schedule

Severe Service (Unique Driving Conditions)

  1. Short Trips (About 10 Miles) In Freezing Temperatures
  2. Towing Or Heavily Loaded
  3. Severe Dust Conditions
  4. Hot Weather, Stop-And-Go Driving
  5. Extensive Idling (Taxi Or Delivery Type Service)

CAMSHAFT TIMING BELT

CAUTIONFailure to replace a faulty camshaft timing belt may result in serious engine damage.

The condition of camshaft drive belts should always be checked on vehicles which have more than 50,000 miles. Although some manufacturers do not recommend belt replacement at a specified mileage, others require it at 60,000-100,000 miles. A camshaft drive belt failure may cause extensive damage to internal engine components on most engines, although some designs do not allow piston-to-valve contact. These designs are often called "Free Wheeling".

Many manufacturers changed their maintenance and warranty schedules in the mid-1980's to reflect timing belt inspection and/or replacement at 50,000-60,000 miles. Most service interval schedules in this manual reflect these changes.

Belts or components should be inspected and replaced if any of the following conditions exist

  1. Cracks Or Tears In Belt Surface
  2. Missing, Damaged, Cracked Or Rounded Teeth
  3. Oil Contamination
  4. Damaged Or Faulty Tensioners
  5. Incorrect Tension Adjustment

Replace timing belt at 60,000 mile interval.

Scheme 3

Scheme 3: SERVICE POINT LOCATIONS

SERVICE LABOR TIMES

Note. Labor times are provided, where available, within appropriate SERVICE INTERVAL table in SCHEDULED SERVICES article.

WHEEL & TIRE SPECIFICATIONS

Wheel and tire information can be found on the information label located on the driver's door lock pillar. Correct inflation pressure is also imprinted on tire sidewall.

WHEEL TIGHTENING

Tighten wheel lug nuts to 87 ft. lbs. (118 N.m).

BATTERY SPECIFICATIONS

CAUTIONWhen battery is disconnected, vehicles equipped with computers may lose memory data. When battery power is restored, driveability problems may exist on some vehicles. These vehicles may require a relearn procedure. See COMPUTER RELEARN PROCEDURES article in the GENERAL INFORMATION Section.

If battery is replaced, new battery should be of the same group number as shown on the original battery's label.

BATTERY WARNING

WARNINGWhen battery is disconnected, vehicles equipped with computers may lose memory data. When battery power is restored, driveability problems may exist on some vehicles. These vehicles may require a relearn procedure. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION section.

REPLACING BLOWN FUSES

CAUTIONBefore replacing a blown fuse, remove ignition key, turn off all lights and accessories to avoid damaging the electrical system. Be sure to use fuse with the correct indicated amperage rating. The use of an incorrect amperage rating fuse may result in a dangerous electrical system overload.

BRAKE PAD WEAR INDICATOR

Indicator will cause a squealing or scraping noise, warning that brake pads need replacement.

CATALYTIC CONVERTER

CAUTIONContinued operation of vehicle with a severe malfunction could cause converter to overheat, resulting in possible damage to converter and vehicle.
CAUTIONAny modification to the exhaust system on turbo models, which reduces exhaust backpressure, will lead to lean fuel mixtures and excessive spark advance. This could cause serious engine damage.

ENGINE COOLANT

If correct antifreeze is used there is no need to use additional additives. They may be harmful to the proper operation of the system.

COOLANT (PROPYLENE-GLYCOL FORMULATIONS)

CAUTIONTo avoid possible damage to vehicle use only ethylene-glycol based coolants with a mixture ratio from 44-68% anti-freeze. DO NOT use 100% anti-freeze as it will cause the formation of cooling system deposits. This results in coolant temperatures of over 300° F (149°C) which can melt plastics. 100% anti-freeze has a freeze point of only -8° F (-22°C).
CAUTIONPropylene-Glycol Mixtures has a smaller temperature range than Ethylene-Glycol. The temperature range (freeze-boil) of a 50/50 Anti-Freeze/Water Mix is as follows: Propylene-Glycol -26° F (-32°C) - 257° F (125°C) Ethylene-Glycol -35° F (-37°C) - 263° F (128°C)
CAUTIONPropylene-Glycol/Ethylene-Glycol Mixtures can cause the destabilization of various corrosion inhibitors. Also Propylene-Glycol/Ethylene-Glycol has a different specific gravity than Ethylene-Glycol coolant, which will result in inaccurate freeze point calculations.

ELECTROSTATIC DISCHARGE SENSITIVE (ESD) PARTS

WARNINGMany solid state electrical components can be damaged by static electricity (ESD). Some will display a warning label, but many will not. Discharge personal static electricity by touching a metal ground point on the vehicle prior to servicing any ESD sensitive component.

ENGINE OIL

CAUTIONNever use non-detergent or straight mineral oil.

FUEL SYSTEM SERVICE

WARNINGRelieve fuel system pressure prior to servicing any fuel system component (fuel injection models).

HALOGEN BULBS

WARNINGHalogen bulbs contain pressurized gas which may explode if overheated. DO NOT touch glass portion of bulb with bare hands. Eye protection should be worn when handling or working around halogen bulbs.

RADIATOR CAP

CAUTIONAlways disconnect the fan motor when working near the radiator fan. The fan is temperature controlled and could start at any time even when the ignition key is in the OFF position. DO NOT loosen or remove radiator cap when cooling system is hot.

RADIATOR FAN

WARNINGKeep hands away from radiator fan. Fan is controlled by a thermostatic switch which may come on or run for up to 15 minutes even after engine is turned off.

WARRANTY INFORMATION

CAUTIONDue to the different warranties offered in various regions and the variety of after-market extended warranties available, please refer to the warranty package that came with the vehicle to verify all warranty options.

BASIC NEW VEHICLE LIMITED WARRANTY

Warrants against defects in materials and workmanship for 3 years or 36,000 miles, whichever occurs first, including factory-installed air conditioning. Warranty repairs will be made at no charge. Roadside Assistance Program (RAP) for duration of warranty coverage includes towing, flat tires, running out of fuel, dead battery, and vehicle lock-out. Beginning in 1991, vehicles are warranted for 3 years or 50,000 miles, whichever occurs first.

POWERTRAIN LIMITED WARRANTY (1991-93)

Warrants that vehicle will be free of defects in materials or workmanship in the following components for 5 years or 60,000 miles, whichever occurs first: engine, suspension and axle, transmission/transaxle and steering.

CORROSION PERFORATION LIMITED WARRANTY

Covers all body sheet panels against perforation or rust-through due to corrosion for 60 months from date of delivery, regardless of mileage. 1991-93 vehicles are covered for 6 years or 100,000 miles whichever occurs first.

EMISSION SYSTEM DEFECT WARRANTY (EXCEPT CALIFORNIA)

Vehicle is warranted against defects in material and workmanship which would cause it to fail to conform to applicable regulations of the Environmental Protection Agency (EPA). Warranty period is 5 years or 50,000 miles, whichever occurs first.

EMISSION SYSTEM PERFORMANCE WARRANTY (EXCEPT CALIFORNIA)

Vehicle is warranted against failure to conform with all applicable EPA regulations as determined by a State Inspection and Maintenance Test if such failure results in owner having to bear penalty or other sanction under local, state or federal law. This warranty lasts for a period of 5 years or 50,000 miles, whichever occurs first. However, if vehicle has been in use for more than 24 months or 24,000 miles, warranty coverage is limited to components which have been installed on the vehicle for the sole or primary purpose of reducing vehicle emissions. See copy of warranty for specific components covered.

EMISSION SYSTEM DEFECT WARRANTY (CALIFORNIA)

If any emission-related part on the vehicle is defective, the part will be repaired or replaced by an authorized dealer at no charge for a period of 3 years or 50,000 miles, whichever occurs first. Certain emission systems parts are covered for 7 years or 70,000 miles, whichever occurs first. See copy of warranty for specific components covered.

EMISSION SYSTEM PERFORMANCE WARRANTY (CALIFORNIA)

If vehicle fails to pass a smog test performed by a licensed Smog Check station within 3 years or 50,000 miles, whichever occurs first, an authorized dealer will perform any repairs necessary for the vehicle to pass the smog test. After the 3 year/50,000 miles performance warranty has expired, a Smog Check test failure due to a defect in a part which is warranted for 7 years/70,000 miles is covered.

FUSE PANEL LOCATION

This vehicle has 2 fuse boxes. One is located in the passenger compartment under the left side of the instrument panel. The other is under the hood beside the battery.

Scheme 4

Scheme 4: PASSENGER COMPARTMENT FUSE BOX IDENTIFICATION

Fuse & Circuit Breaker Identification

  1. 1 - 10 Amp - Radio, Remote Control Mirror
  2. 2 - 10 Amp - Electrical Ignition (1990-92), Defogger, Cruise Control, Sun Roof (1993)
  3. 3 - 10 Amp - Rear Wiper & Washer Not Used (Stylus 1992-93)
  4. 4 - 15 Amp - Foglights
  5. 5 - 10 Amp - Dome Light, Luggage Compartment Light, Radio, Clock
  6. 6 - 20 Amp - Cigarette Lighter
  7. 7 - 10 Amp - Meter, Gauge, Buzzers
  8. 8 - 20 Amp - Windshield Wiper & Washer
  9. 9 - 20 Amp (Stylus) - Power Door Lock 15 Amp (Impulse) - Power Door Lock
  10. 10 - 25 Amp (Impulse) - Rear Defogger Blank (Stylus)
  11. 11 - 15 Amp - Engine ECM, A/T Electronic Control Unit, A/T Control, Generator
  12. 12 - 10 Amp - Turn Signal Lights, Back-Up Lights
  13. 13 - Blank
  14. 14 - Blank
  15. 15 - 15 Amp - Taillight Illumination Light
  16. 16 - 15 Amp - Ignition Coil
  17. 17 - 20 Amp - Rear Defogger (Stylus)
  18. 18 - Blank
  19. 19 - 15 Amp - Stoplight, A/T Electronic Control Unit
  20. 20 - 15 Amp - Horn, Hazard Warning Flasher
  21. 21 - 10 Amp - Starter
  22. 22 - 10 Amp - Supplemental Inflatable Restraint-1
  23. 23 - 10 Amp - Supplemental Inflatable Restraint-2
  24. 24 - 20 Amp - Circuit Breaker Power Window, Sun Roof
  25. 25 - Blank

Scheme 5

Scheme 5: UNDERHOOD FUSE PANEL IDENTIFICATION
  1. 1 - 50 Amp - Ignition Key Switch
  2. 2 - 80 Amp - Main
  3. 3 - 30 Amp - Engine ECM, Fuel Pump
  4. 4 - 30 Amp - Radiator Cooling Fan
  5. 5 - Blank
  6. 6 - Blank
  7. 7 - Blank
  1. 8 - 20 Amp - Blower Motor
  2. 9 - 10 Amp - Air Conditioner
  3. 10 - Blank
  4. 11 - 20 Amp - Condenser Cooling Fan
  5. 12 - 15 Amp (Impulse) - Headlight Cover Blank (Stylus)
  6. 13 - 15 Amp (Impulse) - Anti-Lock Brake Blank (Stylus)
  7. 14 - 15 Amp - Left Headlight
  8. 15 - 15 Amp - Right Headlight
  9. 16 - Blank
  10. 17 - Blank (1990-91) 10 Amp - (1992-93) - O2 Sensor Heater