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 MANUALSDODGE AND RAM1990DAKOTA LE, 2D PICKUP, 3.9 X, 4WD, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - TESTS W/CODES - V6/V8ENTERING ON-BOARD DIAGNOSTICSDRB-II DIAGNOSTIC MODE
1990 Dodge and Ram Dakota LE, 2D Pickup, 3.9 X, 4WD, Automatic
DRB-II Diagnostic Mode
1990 Dodge and Ram Dakota LE, 2D Pickup, 3.9 X, 4WD, AutomaticSECTION DRB-II Diagnostic Mode
- Turn ignition off. Attach DRB-II Tester (C-4805) to diagnostic connector.
- On Dakota, diagnostic connector is located in engine compartment, on right corner of firewall. See Figure and Figure .
- On Pickup, Ramcharger and Van, diagnostic connector is located in engine compartment, on left side of master cylinder. See Figure and Figure .
- Start engine (if possible). With foot on brake, move transmission shift lever through all positions, ending in Park. Turn A/C switch on, then off (if equipped).
- Turn engine off. Without starting engine again, turn ignition on. Enter vehicle model year and engine size. Read fault data on DRB-II. Refer to appropriate NO START TESTS or DRIVEABILITY TESTS trouble shooting chart for specific engine.
NOTE:
When using trouble shooting charts for diagnosis, DO NOT
skip any steps in chart or incorrect diagnosis may result.
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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.