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.
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HOMESERVICE MANUALSISUZU2006ASCENDER S, 5.3 M, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 369 (MIRROR SYSTEMS)DIAGNOSTIC INFORMATION & PROCEDURESPOWER MIRRORS INOPERATIVECIRCUIT/SYSTEM TESTING
2006 Isuzu Ascender S, 5.3 M, 4WD
Circuit/System Testing
2006 Isuzu Ascender S, 5.3 M, 4WDSECTION Circuit/System Testing
WARNING: This page is about a different car, the 2008 Isuzu Ascender, 2008 GMC Envoy, and 2008 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
Mirror Motor Circuit Malfunction
- Ignition OFF, disconnect the harness connector X3 at the appropriate door module.
- Ignition ON, verify a test lamp does not illuminate between the supply voltage circuit terminal B7 and ground.
- Control circuit terminal B4
- Control circuit terminal B2
- Control circuit terminal B6
- If the test lamp illuminates, test the appropriate control circuit for a short to voltage.
- Ignition OFF, test for infinite resistance between the following control circuits and ground:
- Control circuit terminal B4
- Control circuit terminal B2
- Control circuit terminal B6
- If less the specified value, test the appropriate control circuit for a short to ground.
- 4. Test for 40-100 ohms of resistance between the control circuit terminal B4 and the control circuit terminal B6.
- If not within the specified range, test both control circuits for an open/high resistance. If the circuits test normal, test or replace the rearview mirror motor.
- Test for 40-100 ohms of resistance between the control circuit terminal B2 and the control circuit terminal B6.
- If not within the specified range, test both control circuits for an open/high resistance. If the circuits test normal, test or replace the rearview mirror motor.
- If all circuits test normal, replace the appropriate door module.
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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.