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.
SYS.OK|MANUAL.DB● LIVE
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 TESTINGOVERVIEW
1991 Jeep Cherokee 2WD L4-150 2.5L VIN P MFI
Help 1 Operation of the DRBII For Diagnostic Testing: Overview
1991 Jeep Cherokee 2WD L4-150 2.5L VIN P MFISECTION Overview
This HELP contains the following information and instructions:
- How to Use the DRBII Keys
- How to Reach the Speed Control Menu or Charging Menu
- How to Read or Erase Fault Messages with the DRBII
- How to Select a DRBII Test Function
- How to Use the DRBII Volt/Ohmmeter
- How to Use the DRBII Menu
If there is a problem with the operation of the DRBII, the screen will display a blank screen, or any of the following error messages:
NO RESPONSE
RAM TEST FAILURE
CARTRIDGE ERROR
KEYPAD TEST FAILURE
HIGH BATTERY
LOW BATTERY
BAD OF CODE
BAD FRAMING
COMMAND REJECTED
If this happens, refer to Information Bus for diagnosis and repair procedures.
NOTE: Problems with the operation of the DRBII must be corrected before proceeding with fault diagnosis testing.
- How to Use the DRBII Keys
- How to Reach the Speed Control Menu or Charging Menu
- How to Read or Erase Fault Messages with the DRBII
- How to Select a DRBII Test Function
- How to Use the DRBII Volt/Ohmmeter
- How to Use the DRBII Menu
If there is a problem with the operation of the DRBII, the screen will display a blank screen, or any of the following error messages:
NO RESPONSE
RAM TEST FAILURE
CARTRIDGE ERROR
KEYPAD TEST FAILURE
HIGH BATTERY
LOW BATTERY
BAD OF CODE
BAD FRAMING
COMMAND REJECTED
If this happens, refer to Information Bus for diagnosis and repair procedures.
NOTE: Problems with the operation of the DRBII must be corrected before proceeding with fault diagnosis testing.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.