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.
1992 Jeep Cherokee LimitedFACTORY OEM SERVICE PROCEDURE
Engine Controls - Tests W/Codes - Body Control Computer
- Description
- Self-Diagnostic System
- Diagnostic Procedure
- Self-Diagnostic Tests
- Test 1A - Blank DRB-II Message Screen
- Test 1B - Blank DRB-II Message Screen
- Test 2A - Ram Test Error
- Test 3A - ROM Checksum Error
- Test 4A - Keypad Test Failure Message
- Test 5A - Testing DRB-II
- Verification Test
- Test 7A - Bus Failure Messages
- Test 8A - Short To Battery On Bus
- Test 8B - Short To Battery On Bus
- Test 8C - Short To Battery On Bus
- Test 8D - Short To Battery On Bus
- Test 9A - Short To 5 Volts On Bus
- Test 10A - Short To Ground On Bus
- Test 11A - Bus (+) & (-) Shorted Together On Bus
- Test 12A - No Termination On Bus
- Test 13A - Bus Bias Level Too Low On Bus
- Test 13B - Bus Bias Level Too Low On Bus
- Test 14A - Bus Bias Level Too High On Bus
- Test 14B - Bus Bias Level Too High On Bus
- Test 15A - No Bus Bias On Bus
- Test 16A - Bus (+) Open On Bus
- Test 17A - Bus (-) Open On Bus
- Test 18A - Bus (+) & Bus (-) Open On Bus
- Test 19A - Not Receiving Bus Messages Correctly On Bus
- Test 20A - No Response Messages
- Test 21A - Testing Compass/Mini-Trip Module For No Response
- Test 21B - Testing Compass/Mini-Trip Module For No Response
- Test 22A - Testing Body Controller For No Response
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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