LEMON Manuals: Even more car manuals for everyone
Home >> Chrysler >> 2005 >> 300 Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 79 (Charging System - Generators & Regulators) >> Diagnostic Tests >> DTC P2502: Charging System Error >> Testing

DTC P2502: Charging System Error: Testing

WARNING: This page is about a different car, the 2004 Dodge Pickup and 2004 Dodge Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
  1. Visually inspect the positive and negative connections at the battery. Visually inspect the battery negative connections at the engine block. If the connections are free of corrosion and are tight, go to next step. If the connections are not free of corrosion or are loose, clean and/or tighten the connections. See POWERTRAIN VERIFICATION TEST VER-4 (DIESEL)  .
  2. Measure the voltage between the B+ post of the generator and the B+ post of the battery while the engine is running. If the voltage is above .4 volts, repair the high resistance in the B+ circuit from battery to the generator. See POWERTRAIN VERIFICATION TEST VER-4 (DIESEL)  . If the voltage is as specified, go to next step.
  3. Measure the voltage betwen the B+ post of the generator and the B+ post of the right side battery to the left side battery while the engine is running. If the voltage is above .4 volts, repair the high resistance in the B+ crossover cable from right side battery to left side battery. See POWERTRAIN VERIFICATION TEST VER-4 (DIESEL)  . If the voltage is not above .4 volts, go to next step.
  4. Measure the voltage between the generator case and the B- post of the battery. If the voltage is above .1 volt, repair the high resistance in the ground circuit. See POWERTRAIN VERIFICATION TEST VER-4 (DIESEL)  . If the voltage is not above .1 volt, go to next step.
  5. Disconnect the generator field harness connector. Check connectors, and clean and repair as necessary. Measure the resistance between the generator field terminals. If the resistance is between .5 and 15 ohms, go to next step. If the resistance is not as specified, replace the generator. See POWERTRAIN VERIFICATION TEST VER-4 (DIESEL)  .
  6. Turn the ignition off. Reconnect the generator field harness connector. Disconnect the ECM harness connectors. Check the connectors, clean or repair as necessary. Turn the ignition on, engine not running. Measure the voltage between battery positive circuits of the ECM harness connector. Turn the ignition off. Reconnect the ECM harness connectors. Start the engine. Use the DRBIII(R) to measure and record battery voltage. Compare the voltage reading from the voltmeter with that of the DRBIII(R). If the readings are within 3 volts of each other, test is complete. If the readings are not within specifications, replace and program the ECM. See PROGRAMMING  . Perform POWERTRAIN VERIFICATION TEST VER-4 (DIESEL)  .
scientia non olet · About LEMON Manuals