Test B: Warning Indicator On With Engine Running, System Is Not Charging
- Check For Fault Codes In PCM
Connect New Generation Star (NGS) tester to Data Link Connector (DLC). Turn ignition switch to RUN position. Using NGS tester, perform Powertrain Control Module (PCM) self-test. If no DTCs exist, go to next step. If any DTCs exist, perform appropriate test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS in appropriate SELF-DIAGNOSTICS in ENGINE PERFORMANCE.
- Check Generator B+ Circuit (Black/Orange Wire)
Disconnect NGS tester. Measure voltage between ground and generator terminal B+ (Black/Orange wire) at component side. If battery voltage exists, go to next step. If battery voltage does not exist, repair open in Black/Orange wire between generator and battery junction box. See WIRING DIAGRAMS
. Retest for normal system operation.
- Check Generator Integrity
Disconnect generator 3-pin connector. Start engine. If the generator communication lines are disconnected, the generator will self-excite if it is operated at approximately 2,000 engine RPM for a momentary period of time. It will then operate in a default mode at 13.5 volts until the engine is turned off. With the engine running at approximately 2,000 RPM, measure the battery voltage. If the battery voltage is approximately 13.5 volts, go to next step. If the battery voltage is not approximately 13.5 volts, install a new generator. See GENERATOR
under REMOVAL & INSTALLATION. Test the system for normal operation.
- Check Circuit (Light Green/Red Wire) For An Open
Turn ignition off. Disconnect PCM connector C175. Measure the resistance between the generator connector terminal No. 2 (Light Green/Red wire) and PCM connector C175 terminal No. 45, and between the generator connector terminal No. 2 (Light Green/White wire) and ground. See Fig 1
or Fig 2
and Fig 3
. If the resistance less than 5 ohms between the generator and the PCM and greater than 10,000 ohms between the generator and ground, go to next step. If the resistance is not less than 5 ohms between the generator and the PCM or greater than 10,000 ohms between the generator and ground, repair the circuit. Test the system for normal operation.
- Check For Correct PCM Operation
Check for corrosion and pushed-out pins. Connect any disconnected connectors. Make sure all other system connectors are fully seated. Operate the system and verify the concern is still present. If the concern still present, install a new PCM. See appropriate REMOVAL & INSTALLATION article in ENGINE PERFORMANCE. Repeat the PCM self-test. Test the system for normal operation. If concern is not still present, the system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. Clear the DTCs. Repeat the self-test.
Courtesy of FORD MOTOR CO.
Courtesy of FORD MOTOR CO.
Courtesy of FORD MOTOR CO.