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.
1989 Ford Taurus SHOFACTORY OEM SERVICE PROCEDURE
KOER Code/Test Menu
KOER SELF-TEST - CIRCUIT TEST & STEP MENU (3.0L)
| Code No. | Go To: Circuit Test No. (Step No.) | ||
|---|---|---|---|
| 12 | D5 (1) | ||
| 13 | D5 (13) | ||
| 18 | D13 (1) | ||
| 21 | B5 (1) | ||
| 22 (MPFI) | B6 (7) | ||
| 22 (SHO/SEFI | B6 (1) | ||
| 23 | B8 (1) | ||
| 24 | B2 (1) | ||
| 26 (SHO/SEFI) | B3 (1) | ||
| 31 | B10 (16) | ||
| 34 | B10 (19) | ||
| 35 | B10 (19) | ||
| 41 | C1 (10) | ||
| 42 (MPFI) | C1 (22) | ||
| 42 (SHO/SEFI) | C1 (1) | ||
| 52 | B15 (5) | ||
| 56 (SHO/SEFI) | B3 (10) | ||
| 66 (SHO/SEFI) | B3 (4) | ||
| 72 (MPFI) | B6 (10) | ||
| 72 (SHO/SEFI) | D23 (10) | ||
| 73 | B8 (10) | ||
| 74 | B14 (7) | ||
| 77 | D10 (1) | ||
| 91 (SHO/SEFI) | C1 (1) | ||
| 92 (SHO/SEFI) | C1 (1) | ||
| 98 (1) | N/A | ||
|
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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.