DTC P1594-B: CHARGING SYSTEM VOLTAGE TOO HIGH Chrysler LHS II

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article.

1. Using scan tool, stop generator field driver actuation. Using scan tool, read target charging voltage. If target charging voltage is more than 13 volts, go to step 3 . If target charging voltage is 13 volts or less, go to next step.
2. Using scan tool temperature probe, measure temperature near PCM in engine compartment. Using scan tool, read battery temperature sensor temperature. If scan tool display is within 10 degrees of actual under hood temperature, go to next step. If scan tool display is not within 10 degrees of actual under hood temperature, replace PCM. Perform «TEST VER-3A: CHARGING VERIFICATION»(ref-576-S08649961902000030800000) .
3. Start engine. Manually set engine speed to 1600 RPM. Using scan tool, read and compare voltage and target charging voltage. Observe voltage for up to 5 minutes (if necessary) for a one volt difference between voltage and target charging voltage. If difference between voltage and target charging voltage is one volt or less, go to next step. If difference between voltage and target charging voltage is more than one volt, replace Powertrain Control Module (PCM). Perform «TEST VER-3A: CHARGING VERIFICATION»(ref-576-S08649961902000030800000) .
4. Return engine to idle speed. Turn engine off. Turn ignition on. Using scan tool, erase DTCs. For further testing, see GENERATORS & REGULATORS article in ELECTRICAL section.