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 MANUALSCHRYSLER2004PT CRUISER TOURING, 2.4 B, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 37 (CHARGING SYSTEM - GENERATORS & REGULATORS)DIAGNOSTIC TESTSDTC P0622: GENERATOR FIELD CONTROL CIRCUITTESTING
2004 Chrysler PT Cruiser Touring, 2.4 B, Automatic
DTC P0622: Generator Field Control Circuit: Testing
2004 Chrysler PT Cruiser Touring, 2.4 B, AutomaticSECTION Testing
WARNING: This page is about a different car, the 2004 Dodge Intrepid, 2004 Chrysler Intrepid, 2004 Chrysler Concorde, and 2004 Chrysler 300M. However, it is still accessible from the selected car via links, so may be relevant.
- Turn ignition on, engine not running. With the DRBIII®, read DTC's and record the related Freeze Frame data. If the good trip counter displayed and equal to zero, see INTERMITTENT CONDITIONS . See POWERTRAIN VERIFICATION TEST VER-3 . If the good trip counter is not equal to zero, go to next step.
- Turn the ignition off. Disconnect the generator field harness connector. Using a 12-volt test light, jumper it across the generator field harness connector. Turn the ignition on, engine not running. With the DRBIII®, actuate the generator field driver circuit. If the test light illuminate brightly or flash on and off, replace the generator. See POWERTRAIN VERIFICATION TEST VER-3 . If the test light does not illuminate or flash, go to next step.
- Turn the ignition off. Disconnect the generator field harness connector. Using a 12-volt test connected to battery voltage, probe the (Z1) gen ground circuit in the generator field harness connector. If the test light illuminates, go to next step. If the test light does not illuminate, repair the open in the (Z1) gen field ground circuit. See POWERTRAIN VERIFICATION TEST VER-3 .
- Turn the ignition off. Disconnect the generator field harness connector. Disconnect the PCM harness connector. Measure the voltage on the (K20) gen field control circuit in the generator field harness connector. If the voltage is above 1 volt, repair the short to voltage in the (K20) gen field control circuit. See POWERTRAIN VERIFICATION TEST VER-3 . If the voltage is not above 1 volt, go to next step.
- Turn the ignition on. Disconnect the generator field harness connector. Disconnect the PCM harness connector. Measure the resistance between ground and the (K20) gen field control circuit in the generator field harness connector. If the resistance is below 100 ohms, repair the (K20) gen field control circuit for a short to ground. See POWERTRAIN VERIFICATION TEST VER-3 . If the resistance is not below 100 ohms, go to next step.
- Turn the ignition off. Disconnect the generator field harness connector. Disconnect the PCM harness connector. Measure the resistance of the (K20) gen field control circuit from the generator field harness connector to the appropriate terminal of the Miller Special Tool (8815). If the resistance is below 5 ohms, go to next step. If the resistance is not below 5 ohms, repair the open in the (K20) gen field control circuit. See POWERTRAIN VERIFICATION TEST VER-3 .
- If there are no possible causes remaining, replace and program the PCM. See PROGRAMMING . See POWERTRAIN VERIFICATION TEST VER-3 .
NOTE:
Before continuing, check the PCM connector terminals for corrosion, damage, or terminal push out. Repair as necessary.
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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.