LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Jeep >> 2003 >> Grand Cherokee Overland >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing >> DRIVEABILITY Problems >> Start & Stall Condition
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Start & Stall Condition

  1. Turn on ignition. With the engine not running and the DRBIII®, read engine DTCs. Are any DTCs present? If yes, perform the appropriate diagnostic test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS in the SELF-DIAGNOSTICS - GRAND CHEROKEE article. Perform POWERTRAIN VERIFICATION TEST VER-1 under VERIFICATION TESTS in SELF-DIAGNOSTICS - GRAND CHEROKEE article. If no, go to next step.
  2. With the DRBIII®, read the SKIM codes. Are there any SKIM DTCs? If yes, perform the appropriate diagnostic test in the SELF-DIAGNOSTICS - GRAND CHEROKEE article. Perform POWERTRAIN VERIFICATION TEST VER-1 in SELF-DIAGNOSTICS - GRAND CHEROKEE article. If no, go to next step.
  3. With the DRBIII®, read the TP sensor voltage. While monitoring the DRBIII®, slowly open and close the Throttle. Is the voltage change smooth? If yes, go to next step. If no, replace the Throttle Position Sensor. Also, Perform POWERTRAIN VERIFICATION TEST VER-1 under VERIFICATION TESTS in SELF-DIAGNOSTICS - GRAND CHEROKEE article.
  4. With the DRBIII®, read TP sensor voltage. Throttle must be against stop. Is the voltage 0.92 or less with the Throttle closed? If yes, go to next step. If no, check for a binding throttle condition. If OK, replace the Throttle Position Sensor. Also, perform POWERTRAIN VERIFICATION TEST VER-1 under VERIFICATION TESTS in SELF-DIAGNOSTICS - GRAND CHEROKEE article.
    NOTE: For this test to be valid, the thermostat must be operating correctly. This test works best if performed on a cold engine (cold soaked). If the vehicle was allowed to sit over night with no engine start, coolant temperature should be near ambient temperatures.
  5. With ignition on and engine not running, read the ECT value on the DRBIII®. If engine coolant temperature is above 180°F (82°C), allow engine to cool until 150°F (65°C) is reached. Start the engine. During engine warm-up, monitor the ECT sensor value. The temperature value change should be a smooth transition from start-up to normal operating temperature of 180°F (82°C). The value should reach at least 180°F (82°C). Did the Engine Temperature value increase smoothly and did it reach at least 180°F (82°C)? If yes, go to next step. If no, replace the ECT sensor. Perform POWERTRAIN VERIFICATION TEST VER-1 under VERIFICATION TESTS in SELF-DIAGNOSTICS - GRAND CHEROKEE article.
  6. The following additional items should be checked as a possible case for a start and stall condition:
    • Refer to any Technical Service Bulletins (TSBs) that may apply to the symptom.
    • The exhaust system must be free of any restrictions.
    • The engine compression must be within specifications.
    • The engine valve timing must be within specifications.
    • The engine must be free of vacuum leaks.
    • The throttle body must be free of carbon buildup and dirt.
    If any of the above conditions exist, repair as necessary. Perform POWERTRAIN VERIFICATION TEST VER-1 under VERIFICATION TESTS in SELF-DIAGNOSTICS - GRAND CHEROKEE article. If none of the above conditions exist, go to the next step.
  7. Verify that the Fuel Tank is not empty before continuing. Follow the diagnostics for Checking Fuel Delivery. See FUEL DELIVERY  under FUEL SYSTEMS. Was the condition solved after following the above diagnostic test? If yes, then the test is complete. If no, check for contamination/water in the fuel. Ensure the fuel being used in this vehicle meets manufacturer's Fuel Requirement. Perform POWERTRAIN VERIFICATION TEST VER-1 under in SELF-DIAGNOSTICS - GRAND CHEROKEE article.
scientia non olet · About LEMON Manuals