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.
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HOMESERVICE MANUALSJEEP1986CHEROKEE BASE, 2D UTILITY, 2.8 W, RWD, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEM2.8L FEEDBACK CARBURETOR SYSTEMDIAGNOSIS & TESTINGCODE/CHART MENU
1986 Jeep Cherokee Base, 2D Utility, 2.8 W, RWD, Automatic
Code/Chart Menu
1986 Jeep Cherokee Base, 2D Utility, 2.8 W, RWD, AutomaticSECTION Code/Chart Menu
TEST DESCRIPTION MENU
| Test | Description |
|---|---|
| Chart 1 | Dwell Fixed Under 10° |
| Chart 2 | Dwell Fixed Between 10°-50° |
| Chart 3 | Dwell Fixed Over 50° |
| Chart 4 | TPS Enrichment Check |
| Chart 5 | Check Engine Light Inoperative |
| Chart 6 | Code 12 Does Not Flash (Remote Lamp Driver In Harness) |
| Chart 7 | Vacuum Sensor Test |
| Chart 8 | Engine Cranks But Won't Start |
| Chart 9 | Intermittent Engine Operation Or Engine Misfires |
| Trouble Code 12 | No Reference Pulses To ECM |
| Trouble Code 13 | Open Oxygen Sensor Circuit |
| Trouble Code 14 | Shorted Coolant Sensor Circuit |
| Trouble Code 21 | Open TPS Circuit Or Misadjusted |
| Trouble Code 23 | Open Or Grounded M/C Solenoid |
| Trouble Code 34 | Vacuum Sensor Voltage |
| Trouble Code 41 | No Distributor Reference Signal |
| Trouble Code 42 | By-pass Or Est Problem |
| Trouble Code 44 | Lean Exhaust Indication |
| Trouble Code 45 | Rich Exhaust Indication |
| Trouble Code 51 | PROM Problem |
| Trouble Code 55 | Faulty Oxygen Sensor Or Ecm |
RENDER: 1.0x
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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.