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 Chrysler ImperialFACTORY OEM SERVICE PROCEDURE
Fault Counter
- A fault counter will appear along with fault displayed on DRB-II. As an example, DRB-II will display #1 OF 2 FAULTS. SBEC will store up to 8 fault messages. Faults are numbered in reverse order of setting.
- The most recent fault to occur will be number one. Vehicles without air conditioning will always have A/C CLUTCH RELAY CKT (circuit) stored in memory. This fault will always be number one if vehicle is not equipped with that option.
- If no fault messages are stored, DRB-II will display NO FAULTS with start run counter reading SINCE LAST ERASED. When no faults are stored, counter will reach a maximum of 255.
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.