Engine Controls - Tests W/codes 4.6L: Other Lincoln Continental IX

KOEO & KOER DTCs (Hard Faults)

KOEO and KOER DTCs indicate faults are present at time of testing.. A hard fault may cause Malfunction Indicator Light (MIL) to go on and remain on 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, use DIAGNOSTIC TROUBLE CODE (DTC) REFERENCE CHART to find appropriate circuit test to perform.

Continuous Memory DTCs (Intermittent Faults)

These DTCs are used to diagnose intermittent problems. Continuous Memory DTCs are retrieved after KOEO ON-DEMAND SELF-TEST. These DTCs indicate a fault that may or may not be present at time of testing.

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 problem. See INTERMITTENTS in TESTS W/O CODES - EEC-V article.

RETRIEVING CODES

Fault codes are retrieved from EEC-V system through Data Link Connector (DLC). (Scheme 56) Self-diagnostic test procedures are for use with New Generation Star (NGS) scan tool. If a generic scan tool is used, ensure scan tool is certified to OBD-II standard.

DATA LINK CONNECTOR (DLC) LOCATIONS

Scheme 56

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.

Continuous Memory DTCs

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 (DTC) REFERENCE CHART .

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. Inspect system wiring harness for proper connections, bent or broken pins, corrosion, loose wires and proper routing.
3. Check Powertrain Control Module (PCM), sensors and actuators for physical damage.
4. Check engine coolant for proper level and mixture.
5. Check transmission fluid level and quality.

VEHICLE PREPARATION & EQUIPMENT HOOKUP

Apply parking brake, and place shift lever in Park 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.

ADDITIONAL SYSTEM FUNCTIONS

Note. Additional diagnostic system features are available to help diagnose driveability problems and service EEC-V systems.

Accessing Generic OBD-II PIDs

Turn ignition off. Ensure test equipment is properly attached. Program scan tool using the following steps

1. Select VEHICLE & ENGINE SELECTION menu.
2. Select NEW VEHICLE, YEAR & MODEL.
3. Select GENERIC OBD-II OPTIONS. Press CONT button if monitors are not complete.
4. Select PID/DATA MONITOR.
5. Turn ignition on or start engine and allow to idle.
6. Follow operating instructions from scan tool menu.
7. Select PIDs and press START to begin monitoring. If PID value is not as specified, perform appropriate «CIRCUIT TEST»(ref-131243-S24834098742001123100000) .

Accessing Ford Specific PIDs

Turn ignition off. Ensure test equipment is properly attached. Program scan tool using the following steps

1. Select VEHICLE & ENGINE SELECTION menu.
2. Select NEW VEHICLE, YEAR & MODEL.
3. Select DIAGNOSTIC DATA LINK.
4. Select PCM - POWERTRAIN CONTROL MODULE.
5. Select PID/DATA MONITOR & RECORD.
6. Turn ignition on or start engine and allow to idle.
7. Follow operating instructions from scan tool menu.
8. Select PIDs and press START to begin monitoring. If PID value is not as specified, perform appropriate «CIRCUIT TEST»(ref-131243-S24834098742001123100000) .

FREEZE FRAME DATA MODE

This mode allows access to emission related data values from specific generic PIDs. These values are immediately stored in continuous memory when an emission related fault occurs. This provides a snapshot of the conditions that were present when the fault occurred. Freeze frame will be stored until PCM memory is erased.

To access FREEZE FRAME DATA MODE, turn ignition off. Ensure test equipment is properly attached. Program scan tool using the following steps

1. Select VEHICLE & ENGINE SELECTION menu.
2. Select NEW VEHICLE, YEAR & MODEL.
3. Follow operating instructions from scan tool menu.
4. Select GENERIC OBD-II FUNCTIONS. Press CONT button if OBD-II monitors are not complete.
5. Turn ignition on.
6. Select FREEZE FRAME PID TESTS.

FAILURE MODE EFFECTS MANAGEMENT (FMEM)

FMEM mode allows system operation when sensors fail or transmit signals that are out of normal operating range. During FMEM mode, PCM substitutes a mid-range signal for defective sensor while continuing to monitor sensor. If faulty sensor signals return to normal operating range, PCM will use those signals. Depending on specific failure, a fault code may be set in PCM memory.

Drive Cycle

Using scan tool, select ECT, FLI and IAT PIDs from PID/DATA monitor menu. Ensure IAT PID value is 50-100°F (10-38°C) and FLI PID is 15-85 percent (if applicable). Start and run engine until ECT PID value is more than 130°F (54°C). Using scan tool, clear all DTCs (DTC P1000 will remain). Leave ignition on and start engine. Using scan tool, select ON-BOARD SYSTEM READINESS MENU to view status of OBD-II monitors. Go to OBD-II DRIVE CYCLE or appropriate monitor repair verification drive cycle. Once drive cycle is started, DO NOT turn engine off.

OBD-II Drive Cycle

1. Perform «VEHICLE PREPARATION»(ref-131243-S39645425282001123100000) . Drive vehicle in stop and go traffic with a minimum of 4 idle periods (30 seconds each) while observing OBD-II monitor status on scan tool. If Exhaust Gas Recirculation (EGR), HEATED OXYGEN SENSOR (HO2S), Secondary Air (AIR) or catalyst efficiency monitor is not completed, drive vehicle at a constant speed more than 40 MPH, but less than 65 MPH for up to 15 minutes.
2. DO NOT open throttle wide open, use heavy accelerations or use sudden accelerations. If scan tool sounds a 3 beep pulse at any time, OBD-II drive cycle is complete. If EGR, HO2S, AIR or catalyst efficiency monitor is not completed, perform appropriate monitor verification drive cycle. Shut engine off. Retrieve Continuous Memory DTCs to verify DTC P1000 has been cleared.

Comprehensive Component Monitor Repair Verification Drive Cycle

Perform VEHICLE PREPARATION . Perform OBD-II DRIVE CYCLE until the Comprehensive Component Monitor indicates completion status by clearing DTC P1000 on scan tool. If OBD-II drive cycle has been completed and comprehensive component monitor check has not completed, perform QUICK TEST .

EGR Monitor Repair Verification Drive Cycle

Ambient air temperature or IAT PID must read a minimum of 32°F (0°C) to initiate EGR monitor. Perform VEHICLE PREPARATION . Drive vehicle for 5 minutes in stop and go traffic with a minimum of 2 idle periods (30 seconds each). Accelerate vehicle to 45 MPH. Maintain speed for one minute. Stop vehicle and repeat QUICK TEST .

EVAP Running Loss System Repair Verification Drive Cycle

1. Perform «VEHICLE PREPARATION»(ref-131243-S39645425282001123100000) . Using scan tool, ensure FTP PID value is 2.4-2.8 volts with gas cap removed. Reinstall gas cap. Using scan tool, select ON-BOARD SYSTEM READINESS MENU and observe OBD-II monitors. Drive vehicle at a constant speed more than 40 MPH, but less than 65 MPH with throttle as steady as possible.
2. Using scan tool, observe HO2S monitor until it completes. Bring vehicle to a stop. Using scan tool, select IAT, FLI, FTP V, EVAPPDC and EVAPCV PIDs. Ensure IAT PID value is 50-100°F (10-38°C).
3. Drive vehicle at a constant speed more than 40 MPH with steady throttle. During this time, ensure FLI PID value is stable between 15-85 percent tank fill. Ensure FTP V PID value is stable within one volt.
4. To initiate EVAP monitor, EVAPPDC PID value must increase to a minimum of 75 percent (canister purge open). At this time, EVAPCV PID will display 100 percent (canister vent solenoid closed to seal system) and monitor will begin to run. Continue to drive vehicle at steady throttle with light steering until EVAPCV PID value displays zero percent (canister vent solenoid open, system unsealed).
5. Bring vehicle to a stop. Using scan tool, select ON-BOARD SYSTEM READINESS MENU and check if EVAP monitor has completed. If EVAP monitor is not complete, repeat step 3).

Note. During drive cycle or hot ambient temperatures, fuel vapor (from canister and/or fuel tank) may keep EVAP monitor test from initiating.

Catalyst Monitor Repair Verification Drive Cycle

Ambient air temperature or IAT PID must read a minimum of 32°F (0°C) to initiate catalyst monitor. Perform VEHICLE PREPARATION . Drive vehicle in stop and go traffic for 20 minutes. Include 6 different constant speeds between 25-45 MPH. Drive on expressway or freeway for an additional 5 minutes. Repeat QUICK TEST .

Fuel Monitor Or HO2S Monitor Repair Verification Drive Cycle

Perform VEHICLE PREPARATION . Drive vehicle in stop and go traffic for 6 minutes. Include with an one idle period of 30 seconds. Accelerate vehicle to 45 MPH. Maintain speed for one minute. Stop vehicle and repeat QUICK TEST .

Misfire Monitor Repair Verification Drive Cycle

1. On models with Fuel Level Input (FLI) circuit to PCM terminal No. 12, check fuel gauge and FLI PID value. Misfire monitor can only be tested if fuel gauge reads more than 1/4 full or FLI PID value is more than 15 percent.
2. On all models, start engine. Drive vehicle to a location where vehicle speeds can reach 55-60 MPH and then coast down to 40 MPH without traffic interference. Accelerate at wide open throttle to allow vehicle to shift at red line (if equipped with a tachometer).
3. Immediately return to normal speed limits. Accelerate vehicle speed to 60 MPH for 30 seconds. Take foot off accelerator and coast down to 40 MPH. Stop vehicle and repeat «QUICK TEST»(ref-131243-S07493578722001123100000) .

Secondary Air Monitor Repair Verification Drive Cycle

Perform VEHICLE PREPARATION . Perform OBD-II DRIVE CYCLE until the Secondary Air Monitor indicates completion status by clearing DTC P1000 on scan tool. If OBD-II drive cycle has been completed and secondary air monitor check has not completed, perform QUICK TEST .

SUMMARY

If no diagnostic trouble code is present but driveability problem still exists, proceed to TESTS W/O CODES - EEC-V article for symptom diagnosis or intermittent diagnostic procedures.

CIRCUIT TESTS

Note. A breakout box, connected to vehicle harness at PCM, is necessary to perform most circuit tests. References to test pin No. found in CIRCUIT TEST steps refer to test terminals on manufacturer's breakout box. Circuit diagrams at beginning of each test identify connector terminals and circuits.

HOW TO USE CIRCUIT TESTS

1. Ensure all non-EEC related faults found while performing BASIC DIAGNOSTIC PROCEDURES in BASIC TESTING article have been corrected. Follow each test step in order until fault is found. DO NOT replace any part unless directed to do so. When more than one code is retrieved, start with first code displayed.
2. CIRCUIT TESTS ensure electrical circuits are okay before sensors or other components are replaced. Always test circuits for continuity between sensor and PCM. Test all circuits for short to power, opens or short to ground. Voltage Reference (VREF) and Voltage Power (VPWR) circuits should be tested with ignition on or as specified in CIRCUIT TESTS.
3. DO NOT measure voltage or resistance at PCM. DO NOT connect any test light unless specified in testing procedure. All measurements are made by probing rear of connector (wiring harness side). Isolate both ends of a circuit and turn ignition off when checking for shorts or continuity, unless instructed otherwise.
4. Disconnect solenoids and switches from harness before measuring continuity and resistance or applying voltage. After each repair, check all component connections and repeat «QUICK TEST»(ref-131243-S07493578722001123100000) .
5. An open circuit is defined as a resistance reading of 5 ohms or more. This specification tolerance may be too high for some items in EEC-V system. If resistance approaches 5 ohms, always clean suspect connector and coat it with protective dielectric silicone grease. A short is defined as a resistance reading of 10,000 ohms or less to ground, unless stated otherwise in CIRCUIT TEST.

Note. In following tests, circuit diagrams and illustrations are courtesy of Ford Motor Co.