Charging System - Generators & Regulators: Other Ford Taurus IV facelift

BELT TENSION

Vehicles are equipped with automatic drive belt tensioner. Drive belt does not require adjustment. Inspect condition and tension of generator drive belt prior to performing any on-vehicle charging system tests. Replace belt and/or repair tensioner mechanism if necessary.

PRELIMINARY CHECKS

1. Verify battery condition and state of charge.
2. Inspect accessory drive belt and tensioner.
3. Inspect MEGA FUSE FB (175-amp) in Battery Junction Box (BJB).
4. Inspect fuse No. 26 (10-amp) in Battery Junction Box (BJB).
5. Check all connections for looseness or corrosion. Repair as necessary. If no problems are found, go to «SELF-DIAGNOSTIC SYSTEM»(ref-165592-S16028652852004083000000) .

KOEO & KOER Codes

These DTCs indicate faults are present at time of testing. A hard fault may cause Malfunction Indicator Light (MIL) to illuminate and remain illuminated until fault is repaired. The MIL is located on instrument cluster and may be labeled SERVICE ENGINE SOON or CHECK ENGINE. If KOEO or KOER DTCs are retrieved during KOEO ON-DEMAND SELF-TEST or KOER ON-DEMAND SELF-TEST, see DIAGNOSTIC TROUBLE CODE DEFINITIONS under QUICK TESTS to find appropriate system test to perform.

Continuous Memory Codes

Note. Continuous Memory DTCs should be recorded when retrieved. These DTCs may be used to identify intermittent concerns that exist after all KOEO and KOER DTCs have been repaired. Some Continuous Memory DTC faults may not be valid after KOEO and KOER DTCs are serviced.

Continuous Memory DTCs are retrieved after performing KOER ON-DEMAND SELF-TEST. Unlike KOEO or KOER self-tests, which can only be activated on-demand, Continuous Memory self-test is always active. A fault may or may not be present at time of checking for Continuous Memory DTCs. This self-test is helpful in diagnosing intermittent concerns.

After noting and/or repairing fault, clear DTCs from memory. See CLEARING CODES . Intermittent faults may be caused by a sensor, connector or wiring-related concern.

RETRIEVING CODES

Fault codes are retrieved from powertrain control system through Data Link Connector (DLC). (Scheme 12) DLC is located under left side of instrument panel, right side of steering column. Self-diagnostic test procedures are for use with Rotunda Worldwide Diagnostic System (WDS), New Generation Star (NGS) scan tool or equivalent. If a generic scan tool is used, ensure scan tool is certified to OBD-II standard. A generic scan tool may not be capable of performing all necessary test functions. Go to READING CODES.

Scheme 12

READING CODES

Note. If self-test will not activate or TOOL COMMUNICATION ERROR is received, go to TEST QA under SYSTEM TESTS in appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.

Pass Codes

SYSTEM PASS indicates no DTCs were recorded in that portion of test. If SYSTEM PASS is not retrieved in KOEO ON-DEMAND SELF-TEST, DTCs retrieved during KOER ON-DEMAND SELF-TEST may not be valid.

These DTCs result from information stored by PCM during continuous self-test monitoring. Use these DTCs for diagnosis only when KOEO ON-DEMAND SELF-TEST and KOER ON-DEMAND SELF-TEST result in SYSTEM PASS and all steps under QUICK TEST are successfully completed. These DTCs indicate faults previously recorded. Fault may or may not be currently present. See DIAGNOSTIC TROUBLE CODE DEFINITIONS under QUICK TESTS.

CLEARING CODES

VISUAL CHECK

Perform the following, and make all necessary repairs before continuing with QUICK TEST

1. Inspect air cleaner and inlet ducts.
2. Check all engine vacuum hoses for damage, bends, leaks, cracks, kinks or improper routing.
3. Inspect system wiring harness for proper connections, bent or broken terminals, corrosion, loose wires and proper routing.
4. Check Powertrain Control Module (PCM), sensors and actuators for physical damage.
5. Check engine coolant for proper level and mixture.
6. Check transmission fluid level and quality.

VEHICLE PREPARATION & EQUIPMENT HOOKUP

Apply parking brake, and place shift lever in Park (A/T) or Neutral (M/T) position. Block drive wheels. Turn off all electrical accessories. Ensure engine is at normal operating temperature. If vehicle is equipped with an auxiliary powertrain control system (RPM control), it must be turned off when performing any self-test procedure. Connect appropriate test equipment to vehicle as follows

Scheme 13

1. Generic Scan Tool Ensure scan tool meets or exceeds OBD-II standard. Follow scan tool manufacturer's operating instructions to hook up equipment and record DTCs.
2. New Generation STAR Scan Tool Turn ignition switch to OFF position. Ensure proper memory (EPROM) card is inserted into NGS scan tool. Connect service connectors of adapter cable to vehicle Data Link Connector (DLC) and the NGS scan tool. (Scheme 13) Connect NGS scan tool power supply cable to power and go to «KOEO ON-DEMAND SELF-TEST»(ref-165592-S27160879902004083000000).

SYSTEM TESTS

Identify symptom and perform appropriate system test. See SYMPTOM INDEX table.

SYMPTOM INDEX

SABLE

For system wiring diagram, see STARTING/CHARGING in SYSTEM WIRING DIAGRAMS article.

TAURUS

For system wiring diagram, see STARTING/CHARGING in SYSTEM WIRING DIAGRAMS article.