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.
2005 Jeep TJ (CANADA) L4-2.4LFACTORY OEM SERVICE PROCEDURE
PCM/SKIM Programming
CAUTION: ASSURE THE DRBIII(R) IS PROGRAMMED WITH THE LATEST VERSION OF CURRENT SOFTWARE.
NOTE: Before replacing the PCM for a failed driver, control circuit, or ground circuit, be sure to check the related component/circuit integrity for failures not detected due to a double fault in the circuit. Most PCM driver/control circuit failures are caused by internal component failures (i.e. relays and solenoids) and shorted circuits (i.e. pull-ups, drivers, and switched circuits). These failures are difficult to detect when a double fault has occurred and only one DTC has been set.
When a PCM (JTEC) and the SKIM are replaced at the same time, perform the following steps in order:
1. Program the new PCM (JTEC).
2. Program the new SKIM.
3. Replace all ignition keys and program them to the new SKIM.
NOTE: Before replacing the PCM for a failed driver, control circuit, or ground circuit, be sure to check the related component/circuit integrity for failures not detected due to a double fault in the circuit. Most PCM driver/control circuit failures are caused by internal component failures (i.e. relays and solenoids) and shorted circuits (i.e. pull-ups, drivers, and switched circuits). These failures are difficult to detect when a double fault has occurred and only one DTC has been set.
When a PCM (JTEC) and the SKIM are replaced at the same time, perform the following steps in order:
1. Program the new PCM (JTEC).
2. Program the new SKIM.
3. Replace all ignition keys and program them to the new SKIM.
Factory Service Tools
Use the Manual With the Right Hardware
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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.