P0622

Tests 1 - 3:

Tests 4 - 8:

SYMPTOM
P0622 - GENERATOR FIELD NOT SWITCHING PROPERLY

WHEN MONITORED
With the ignition key ON and the engine running.

SET CONDITION
When the PCM tries to regulate the generator field with no result during monitoring.

POSSIBLE CAUSES
- Generator field wiring harness intermittent problem
- Generator field wiring harness observable problem
- ASD relay output circuit open
- Generator field driver circuit open
- Generator field driver circuit shorted to ground
- Generator field resistance ≥ 5.0 ohms
- Powertrain control module