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.
1990 Isuzu Impulse AutomaticFACTORY OEM SERVICE PROCEDURE
Control Units
CONTROL UNITS LOCATION
| Component | Location |
|---|---|
| A/C Cut Control Unit | Below glove box |
| Automatic Door Lock Control Unit | Behind trim panel of driver's door. |
| Automatic Transmission Control Unit | Behind left side of dash. |
| Diagnostic Energy Reserve Module | Behind front console panel. |
| Electronic Control Module | Behind left side of dash. See Figure . |
| Initiator Module | In steering wheel, behind air bag. |
| Shift Lock Control Unit | On floor, under shift lever assembly. |
| Supplemental Restraint System (SRS) Control Unit | On top of steering column. |
Factory Service Tools
Use the Manual With the Right Hardware
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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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