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 Bronco II RWD, Standard, M5OD-R1FACTORY OEM SERVICE PROCEDURE
Test Procedure - Code Output
Code Output, indications and actions to be taken.
- Code Output [11-1(0)-11]
Both tests indicate a PASS. Action to take:- If engine idles rough or runs rough, Go to TEST D19 - SYSTEM CHECKΒ , step 2). If this symptom is not present; Go to COMPUTED TIMING CHECKΒ .
- If engine is a no start, go to TEST A1 - NO STARTΒ .
- Code Output [Any Code(s)-1(0)-11]
KOEO tests indicates a FAULT. Action to take:- Go to KOEO service codes. See KEY ON ENGINE OFF (KOEO) CIRCUIT TEST MENUΒ .
- Always start with the first code displayed.
- Code Output [11-1(0)-Exceptions]
Continuous Memory indicates a FAULT. Action to take:- DO NOT service continuous memory codes at this time.
- If engine idles rough or runs rough, go to TEST D19 - SYSTEM CHECKΒ , step 2). If this symptom is not present, go to COMPUTED TIMING CHECKΒ .
- Refer to code output. See KOEO CONTINUOUS MEMORY CODE EXCEPTIONSΒ .
- Code Output [Any Code(s)-1(0)-Any Code(s)]
Both tests indicate a FAULT. Action to take:- DO NOT service CONTINUOUS MEMORY CODES at this time.
- Go to KOEO service codes. See KEY ON ENGINE OFF (KOEO) CIRCUIT TEST MENUΒ .
- Always start with the first code displayed.
- Code Output [11-1(0)-15]
Action to take: Go to TEST D15 - KOEO CODE 15Β .
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:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.
