P1594

Test 1 - 2:

Test 3 - 6:

SYMPTOM
P1594-CHARGING SYSTEM VOLTAGE TOO HIGH

WHEN MONITORED
The engine running. The engine speed greater than 380 RPM.

SET CONDITION
Battery voltage is 1 volt greater than desired system voltage.

POSSIBLE CAUSES
- Target charging voltage above 13 volt
- Target voltage differs from battery voltage
- (K20) gen field driver circuit shorted to ground
- Generator field
- PCM