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Home >> Chrysler >> 2001 >> PT Cruiser Classic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0622: Generator Field Not Switching Properly >> Testing
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DTC P0622: Generator Field Not Switching Properly: Testing

  1. Turn ignition on. Using scan tool, actuate generator field driver circuit. Using a test light connected to ground, backprobe generator field driver circuit (Dark Green wire) at generator 2-pin connector. If test light illuminates brightly and flashes, go to next step. If test light does not illuminate brightly and flash, go to step  4 .
  2. Using scan tool, clear DTCs. With generator field driver circuit still actuating, wiggle wiring harness between generator and PCM. Using scan tool, read DTCs with actuator test still running. If DTC P0622 resets, repair wiring harness as necessary where wiggling caused problem to appear. If DTC P0622 does not reset, go to next step.
  3. Turn ignition off. Visually inspect related connectors and wiring harness for damage. Repair connectors or wiring harness as necessary. If connectors and wiring harness are okay, test is complete.
    NOTE: Before proceeding, carefully inspect all harness connectors for corrosion or loose terminals.
  4. Turn ignition on. Using scan tool, record all DTCs and freeze frame data. Clear DTCs. Using scan tool, actuate generator field driver circuit. Measure voltage between ground and ASD relay output circuit (Dark Green/Orange wire) at generator 2-pin connector (backprobe). If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open in ASD relay output circuit.
  5. Turn ignition off. Disconnect PCM harness connectors. See Figure . Measure resistance between ground and generator field driver circuit (Dark Green wire) at PCM C1 harness connector terminal No. 8. See Figure . If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground in Dark Green wire.
  6. Measure resistance of generator field driver circuit (Dark Green wire) between generator 2-pin harness connector and terminal No. 8 at PCM C1 harness connector. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open in Dark Green wire.
  7. Measure resistance between generator field terminals on back of generator. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair or replace generator.
  8. If no other possible causes are remaining, replace PCM.
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