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 MANUALSJEEP1991CHEROKEE 2WD L4-150 2.5L VIN P MFIREPAIR AND DIAGNOSISCRUISE CONTROLTESTING AND INSPECTIONSCAN TOOL TESTING AND PROCEDURESHELP 1 OPERATION OF THE DRBII FOR DIAGNOSTIC TESTINGHOW TO SELECT A DRBII TEST FUNCTION
1991 Jeep Cherokee 2WD L4-150 2.5L VIN P MFI
How to Select A DRBII Test Function
1991 Jeep Cherokee 2WD L4-150 2.5L VIN P MFISECTION How to Select A DRBII Test Function
To perform a specific DRBII test function from one of the SPEED CONTROL MENU or CHARGING MENU test categories, proceed as follows.
A. Press the number of the desired test category, or move the arrows to the desired category and press ENTER. The display will change to a menu of the test functions that are available in the selected category.
B. Press the number of the desired test function, or move the arrows to the desired function and press ENTER.
A. Press the number of the desired test category, or move the arrows to the desired category and press ENTER. The display will change to a menu of the test functions that are available in the selected category.
B. Press the number of the desired test function, or move the arrows to the desired function and press ENTER.
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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.