Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1983 Isuzu Impulse StandardFACTORY OEM SERVICE PROCEDURE
I-TEC Control System
- Description
- Operation
- Diagnosis & Testing
- Notes
- Entering Diagnostic Mode
- Clearing Trouble Codes
- Diagnostic Tools
- Circuit Inspection
- Test 1: Power Supply Check
- Test 2: O2 Sensor (Codes 13, 44 And 45)
- Test 3: Water Temp Sensor (Codes 14, 15 & 16)
- Test 4: TPS (Codes 21, 43 & 65)
- Test 5: Starter Signal (Code 22)
- Test 6: Crank Angle Sensor (Code 41)
- Test 7: Air Flow Sensor (Codes 61 And 62)
- Test 8: Vehicle Speed Sensor (Code 63)
- Test 9: Detonation Sensor (Code 66)
- Test 10: MCU (Codes 51, 52 & 55)
- Test 11: Power Transistor System (Codes 23, 35 & 54)
- Test 12: Vacuum Switching Valve (Code 25 & 53)
- Test 13: Fuel Injector Circuits (Code 33)
- Test 14: Injector Transistor Ground Circuit (Code 64)
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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