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 Tempo BaseFACTORY OEM SERVICE PROCEDURE
KOEO Code/Test Menu
KOEO SELF-TEST - CIRCUIT TEST & STEP MENU (2.3L)
| Code No. | Go To: Circuit Test No. (Step No.) |
|---|---|
| 15 | D15 (3) |
| 19 (OHC MPFI & HSC MPFI) | D17 (5) |
| 21 | B5 (1) |
| 22 | B6 (1) |
| 23 | B8 (1) |
| 24 (OHC MPFI & HSC MPFI) | B2 (1) |
| 24 (Turbo MPFI) | B1 (1) |
| 26 (Turbo MPFI) | B9 (1) |
| 28 (Turbo MPFI) | B1 (1) |
| 31 (OHC MPFI) | B4 (2) |
| 31 (HSC MPFI) | B10 (1) |
| 34 (HSC MPFI) | B10 (8) |
| 35 (HSC MPFI) | B10 (5) |
| 51 | B5 (5) |
| 52 (OHC MPFI & HSC MPFI) | D15 (1) |
| 53 | B8 (3) |
| 54 (OHC MPFI & HSC MPFI) | B2 (5) |
| 54 (Turbo MPFI) | B1 (4) |
| 56 (Turbo MPFI) | B9 (3) |
| 58 (Turbo MPFI) | B1 (4) |
| 61 | B5 (7) |
| 63 | B8 (6) |
| 64 (OHC MPFI) | B2 (7) |
| 64 (Turbo MPFI) | B1 (6) |
| 64 (HSC MPFI) | B2 (7) |
| 66 (Turbo MPFI) | B9 (6) |
| 67 | B13 (1) |
| 83 (OHC MPFI) | B4 (12) |
| 84 (OHC MPFI) | B4 (12) |
| 84 (HSC MPFI) | B10 (11) |
| 85 (HSC MPFI) | D4 (6) |
| 87 (OHC MPFI & (HSC MPFI) | C2 (7) |
| 89 (OHC MPFI) | D22 (1) |
| 95 (HSC MPFI) | C2 (12) |
| 96 (HSC MPFI) | C2 (18) |
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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