Experiencing trouble starting your 2007 Jeep Commander and seeing the OBD2 code P0622? This code, indicating a Generator Field Control Circuit Malfunction, can sometimes be related to starting issues, even if indirectly. While P0622 itself points to the generator (alternator) control circuit, electrical glitches in this system can sometimes manifest in starting problems. Let’s explore a common culprit behind starting problems in Jeep Commanders and how to diagnose it, which may help resolve issues related to code P0622 in certain scenarios.
One often overlooked area when troubleshooting a no-start condition, especially in Jeep Commanders, is the ignition switch actuator pin. A failure in this component is surprisingly common and can prevent the engine from cranking, even if other parts of the starting system are functioning correctly. Before diving into complex electrical diagnostics for the P0622 code, it’s wise to rule out this simpler, mechanical issue.
Checking the Starter System
Before suspecting the ignition actuator pin, a quick check of the starter and its related circuits is a good starting point. You can easily test the starter relay and wiring using a jumper wire.
- Locate the Starter Relay: Refer to your Jeep Commander’s owner’s manual to find the location of the starter relay in the fuse box, typically under the hood.
- Relay Jump Test: With your Jeep Commander in Park (for automatic transmissions) or Neutral (for manual transmissions) and the parking brake firmly engaged, remove the starter relay.
- Jumper Wire Connection: Use a jumper wire to bridge terminals 30 and 87 in the relay socket. Caution: Ensure the vehicle is in Park or Neutral before performing this test to prevent accidental movement.
If jumping these terminals causes the starter to crank the engine, you can be reasonably sure that the starter motor itself, the starter fuse, and the wiring to the solenoid are in good working order. If the engine cranks with the jumper wire, the problem likely lies upstream in the starting circuit, potentially with the ignition switch or the actuator pin.
Investigating the Ignition Actuator Pin
The ignition actuator pin is a small but crucial component in the ignition system. Its tip, often made of plastic or a weaker metal, can break over time. This breakage is frequently the reason why you might turn the ignition key and feel resistance, with the gauges and accessories turning on, but the engine failing to crank.
Here’s how to check the ignition actuator pin:
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Access the Ignition Switch: Begin by removing the plastic covers surrounding the steering column. These are usually held in place by screws.
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Remove the Ignition Switch: You’ll find the ignition switch attached to the actuator assembly. It’s typically secured by a single bolt. This bolt often requires a security T-10 Torx bit. If you don’t have a security bit, you can carefully break off the security tab using a small punch or even a nail and then use a standard Torx bit.
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Detach the Ignition Switch: Once the bolt is removed, the ignition switch can slide off the actuator assembly. It might be a snug fit as it snaps onto the actuator. Gently pry it straight away from the actuator. Be careful not to bend the thin, flexible rod that extends from the actuator into the switch. Damaging this rod can lead to issues like the “key in” chime sounding even after the key is removed.
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Inspect the Actuator Pin Tip: With the ignition switch removed, you can now see the tip of the actuator pin. Carefully inspect it for any signs of breakage. A common failure point is a broken tip, where part of it may still be intact, allowing partial ignition function but not full engagement for starting.
Image: A close-up view of a broken ignition actuator pin tip removed from a Jeep Commander, highlighting the common fracture point that prevents proper ignition switch engagement.
- Testing the Switch with a Screwdriver: With the ignition switch detached, you can manually test the switch and the rest of the starting circuit. Use a screwdriver to turn the ignition switch directly. If the engine starts when you turn the switch with a screwdriver, this confirms that the ignition switch itself and the downstream circuits are functional. It strongly indicates that the broken actuator pin is the culprit preventing normal starting with the key.
Conclusion
If your 2007 Jeep Commander is exhibiting starting problems and you suspect it might be related to OBD2 code P0622 or a general electrical issue, checking the ignition actuator pin is a worthwhile diagnostic step. While code P0622 points to the generator field control circuit, a broken ignition actuator pin can disrupt the proper sequence of starting events and potentially trigger related electrical codes indirectly due to voltage fluctuations or system checks failing during a no-start condition.
If you find a broken actuator pin tip, replacing the actuator pin assembly is the recommended fix. These assemblies are generally available at auto parts stores or online retailers. Replacing this part can often resolve the no-start issue and get your Jeep Commander back on the road.
Remember, if you are uncomfortable performing these diagnostic steps or the problem persists after checking the actuator pin, it’s always best to consult a qualified automotive technician. They can provide a comprehensive diagnosis and repair, ensuring all electrical systems related to starting and the P0622 code are properly addressed.
