QT1 CARRY OUT THE PCM QUICK TEST
Note. For vehicles indicating not ready for inspection maintenance (I/M) testing, refer to the Owner's Literature, Readiness For Inspection/Maintenance (I/M) Testing to complete the system readiness. If an I/M testing system readiness concern is still present, GO to PINPOINT TEST QC .
Note. If the vehicle was brought in with an emission compliance concern, GO to PINPOINT TEST EM .
Note. For applications that use a stand-alone transmission control module (TCM), the PCM does not output TCM related diagnostic trouble codes (DTCs). Refer to the appropriate Automatic Transaxle/Transmission article, to continue diagnosis.
Note. If unable to access the PCM DTCs, or a scan tool communication concern exists, GO to PINPOINT TEST QA . For additional information on retrieving malfunction indicator lamp (MIL) and non-MIL DTCs, refer to QUICK TEST DESCRIPTION for the Continuous Memory Self-Test.
- Complete the preliminary checks looking for obvious concerns that may relate to the symptom. Check for the following items: fuses electrical circuits and connectors vacuum lines (leaks, routing) air intake system (leaks, restrictions) fuel quality (octane, contamination, winter/summer blend) cooling system (engine operating at correct temperature)
- Access any related On-line Automotive Service Information System (OASIS) or Technical Service Bulletin (TSB) information (if available).
- Carry out the PCM self-test to access any DTCs. Record any key on engine off (KOEO), key on engine running (KOER) (if the engine runs) and continuous memory (MIL and non-MIL) DTCs.
| Yes | No |
|---|
| GO to DIAGNOSTIC TROUBLE CODE (DTC) Charts and Descriptions for direction to repair DTCs after noting the following: DIAGNOSE the DTCs in the following order (begin diagnosis with the first DTC output in that mode and diagnose any circuit related DTCs first). For multiple circuit DTCs that are set as a result of a concern with more than one component, REFER to the appropriate System Wiring Diagrams article, Electronic Engine Controls Cell and identify the common cause such as SIGRTN, VREF, or VPWR. CONTINUE DTC diagnosis by referring to the appropriately identified pinpoint test. Any KOEO self-test DTCs. Any KOER self-test DTCs. Any continuous memory self-test DTCs. Retrieve any available freeze frame data and disregard any identical/related continuous DTCs already repaired. | GO to NO DIAGNOSTIC TROUBLE CODES (DTCS) PRESENT SYMPTOM CHART INDEX for direction to the correct symptom chart in NO DIAGNOSTIC TROUBLE CODES (DTCS) PRESENT SYMPTOM CHARTS . If the symptom is not listed, REFER to the appropriate Service Information article to continue diagnosis. |
No Diagnostic Trouble Codes (DTCs) Present Symptom Chart Index
| System/Symptom | Oasis Number | Chart Number |
|---|
| Starting Concerns | Hard Start/Long Crank/Erratic Start/Erratic Crank | 602300 | Chart Number: 2 |
| No crank | 601300 | Chart Number: 22 |
| No start (engine cranks) | 603300 | Chart Number: 3 |
| Unique Idle Concerns | Slow return to idle | 617400 | Chart Number: 4 |
| Rolling idle | 618400 | Chart Number: 1 |
| Fast idle | 619400 | Chart Number: 5 |
| Low/Slow idle | 607400 | Chart Number: 6 |
DIAGNOSTIC TROUBLE CODES (DTCS) PRESENT SYMPTOM CHART - DRIVEABILITY
| System/Symptom | Oasis Number | Chart Number |
|---|
| Stalls/Quits | Idle/Acceleration/Cruise | 607x00 | Chart Number: 1 |
| Deceleration | 607700 | Chart Number: 6 |
| Stall after start | 607000 | Chart Number: 1 |
| Runs Rough | 608x00 | Chart Number: 1 |
| Misses | 609x00 | Chart Number: 1 |
| Buck/Jerk | 610x00 | Chart Number: 1 |
| Hesitation/Stumble | 611x00 | Chart Number: 1 |
| Surge | 612x00 | Chart Number: 1 |
| Backfires | 613x00 | Chart Number: 7 |
| Lack/Loss of Power | 614x00 | Chart Number: 8 |
| Spark Knock | 615x00 | Chart Number: 9 |
DIAGNOSTIC TROUBLE CODES (DTCS) PRESENT SYMPTOM CHART (DRIVEABILITY - PERFORMANCE DRIVING CONCERNS)
Note. OASIS identifiers (the x means any number (1-9) can be used) xxx4xx equals during idle, xxx5xx equals during acceleration, xxx6xx equals during cruise, xxx7xx equals during deceleration.
| System/Symptom | Oasis Number | Chart Number |
|---|
| Diesels/Runs On | 621000 | Chart Number: 5 |
| Poor Fuel Economy | 622000 | Chart Number: 10 |
| Emissions Compliance | 623000 | Chart Number: 11 |
DIAGNOSTIC TROUBLE CODES (DTCS) PRESENT SYMPTOM CHART - ADDITIONAL DRIVEABILITY CONCERNS
| System/Symptom | Oasis Number | Chart Number |
|---|
| Warning Indicators | Malfunction indicator lamp (MIL) | 698298 | Chart Number: 12 |
| Transmission control indicator lamp (TCIL) | 698298 | Chart Number: 12 |
| Power take off (PTO) | 507000 | Chart Number: 12 |
| Temperature warning indicator or gauge (for vehicles equipped with a cylinder head temperature (CHT) sensor only) | 206000 | Chart Number: 12 |
| Check fuel cap indicator | 206000 | Chart Number: 12 |
| Powertrain malfunction indicator (wrench) | 698298 | Chart Number: 12 |
| Instrumentation | Tachometer inoperative | 204000 | Chart Number: 14 |
| Speedometer/odometer inoperative | 204000 | Chart Number: 14 |
| Boost gauge indicates higher than normal boost | 204000 | Chart Number: 14 |
| Fuel gauge inoperative | 204000 | Chart Number: 14 |
DIAGNOSTIC TROUBLE CODES (DTCS) PRESENT SYMPTOM CHART - ELECTRICAL
| System/Symptom | Oasis Number | Chart Number |
|---|
| Oil System Concerns | High oil consumption | 401000 | Chart Number: 15 |
| Leaks | 401000 | Chart Number: 15 |
| Cooling System Concerns | Electric cooling fan does not operate (low, high or variable speed) | 402000 | Chart Number: 16 |
| Cooling fan clutch does not operate | 402000 | Chart Number: 16 |
| Electric cooling fan always runs | 402000 | Chart Number: 17 |
| Exhaust System Concerns | Visible smoke | 403000 | Chart Number: 18 |
| Odor (sulfur or rotten egg smell) | 403000 | Chart Number: 21 |
| Fuel System Concerns | Odor, engine compartment | 404000 | Chart Number: 19 |
| Engine Noise (under hood) | 497000 | Chart Number: 20 |
DIAGNOSTIC TROUBLE CODES (DTCS) PRESENT SYMPTOM CHART - ENGINE
| System/Symptom | Oasis Number | Chart Number |
|---|
| Automatic Transmission (A/T) Shift Concerns | Upshift | 501000 | Chart Number: 13 |
| Downshift | 502000 | Chart Number: 13 |
| Engagement | 503000 | Chart Number: 13 |
DIAGNOSTIC TROUBLE CODES (DTCS) PRESENT SYMPTOM CHART - DRIVELINE
| System/Symptom | Oasis Number | Chart Number |
|---|
| PTO Concerns | Not working correctly | 507000 | Chart Number: 12 |
DIAGNOSTIC TROUBLE CODES (DTCS) PRESENT SYMPTOM CHART - POWER TAKE OFF (PTO)
Chart 1
- Stalls/Quits: Idle, Acceleration, Cruise, Stall After Start
- Runs Rough
- Misses
- Buck/Jerk
- Hesitation/Stumble
- Surge
- Unique Idle Concerns: Rolling Idle
Note. For some vehicle applications, the engine may stall if left running while refueling. Advise the customer to turn the engine off while refueling to avoid contamination or damage to the evaporative emission (EVAP) system.
| SYSTEM/COMPONENT | REFERENCE ( PINPOINT TESTS unless noted) |
|---|
| Check the following parameter identifiers (PIDs): DPFEGR (if equipped) (hot idle value within 0.15 volt of the ignition ON, engine OFF value) LONGFT1/LONGFT2 (value between -20 and +20%) VPWR (value between 10 and 17.0 volts, and within 0.5 volt of battery voltage) | DPFEGR PID value not within 0.15 volt of ignition ON, engine OFF value: GO to PINPOINT TEST HH . LONGFT1/LONGFT2 value low (-): Continue diagnosis. Concentrate checks in areas that would cause the engine to run rich. LONGFT1/LONGFT2 value high (+): Continue diagnosis. Concentrate checks in areas that would cause the engine to run lean. VPWR not between 10 and 17.0 volts: REFER to the appropriate Charging System article and CARRY OUT the Inspection and Verification to continue diagnosis. VPWR between 10 and 17.0 volts, but not within 0.5 volt of battery voltage: CHECK the B+ voltage to the powertrain control module (PCM) power relay. CHECK the VPWR circuit between the PCM and the PCM power relay. CHECK the PWR GND circuits. |
| For vehicles that run rough at idle: Check the INJx_F PIDs (the "x" indicates the injector number) with the ignition ON, engine running. There is 1 INJx_F PID for each engine cylinder. All INJx_F PIDs must indicate NO FAULT. | The INJx_F PID(s) indicate a fault (an injector circuit concern is indicated). For Edge 2.0L, Explorer 2.0L, F-150 3.5L, Flex GTDI 3.5L, Focus, MKS 3.5L, MKT 3.5L and Taurus GTDI 3.5L vehicles, GO to PINPOINT TEST DI . For all others, GO to PINPOINT TEST KG . |
| Mass Airflow (MAF) Sensor | GO to PINPOINT TEST DC . |
| Manifold Absolute Pressure (MAP) Sensor | For F-150 3.5L, Flex GTDI 3.5L, MKS 3.5L, MKT 3.5L and Taurus GTDI 3.5L, GO to PINPOINT TEST DN . For all others, GO to PINPOINT TEST DM . |
| Secondary Ignition System | For vehicles equipped with a coil pack ignition system, GO to PINPOINT TEST JC . For all others, GO to PINPOINT TEST JB . |
| Fuel Delivery System | GO to PINPOINT TEST HC . |
| Exhaust System | GO to PINPOINT TEST HF . |
| Positive Crankcase Ventilation (PCV) System | GO to PINPOINT TEST HG . |
| EVAP System | For Fiesta, GO to PINPOINT TEST HZ . For all others, GO to PINPOINT TEST HX . |
| Charging System | Visual. REFER to the appropriate Charging System article and CARRY OUT the Inspection and Verification to continue diagnosis. |
| Universal Heated Oxygen Sensor (HO2S) | For E-Series 4.6L, E-Series 5.4L, Edge, Escape, Expedition, Explorer, F-150, F-Series Super Duty, Flex, Focus, Fusion 2.5L, Fusion 3.0L, MKS, MKT, MKX, Mustang, Navigator, and Taurus, GO to PINPOINT TEST DZ . |
| Automatic Transmission | REFER to the appropriate Automatic Transaxle/Transmission article, Diagnosis By Symptom to continue diagnosis. |
| Base Engine | REFER to the appropriate Engine System - General Information and CARRY OUT the Inspection and Verification to continue diagnosis. |
| Intake Air System | GO to PINPOINT TEST HU . |
| Fuel Injection System | For Edge 2.0L, Explorer 2.0L, F-150 3.5L, Flex GTDI 3.5L, Focus, MKS 3.5L, MKT 3.5L and Taurus GTDI 3.5L vehicles, GO to PINPOINT TEST DI . For all others, GO to PINPOINT TEST KG . |
| Additional Testing | GO to PINPOINT TEST Z . |
| Additional Checks: Some vehicles have a TQ_CNTRL PID available. Check this PID to determine if the PCM is reducing torque. The TQ_CNTRL PID may indicate which component or system, if any, is requesting a torque reduction. Correct PCM vehicle identification (VID) block information. Refer to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) to carry out the Making Changes to the VID Block procedure. Be aware of engine RPM/speed limiting functions of the PCM (look for incorrect high vehicle speed signal from ABS, VSS, or OSS). Verify the fuel filler cap is correctly tightened or the capless fuel tank filler pipe is correctly sealed and not physically damaged. Drivelines Manual transmission/clutch Charging system Traction control system (if equipped) A/C system (for surge with A/C on) Speed control system (for surge with speed control on) | REFER to the appropriate Service Information article . |
| Brake Over Accelerator | CHECK for simultaneous brake pedal and accelerator pedal operation inadvertently activating the brake over accelerator feature. CHECK the BRKOVR_ACTION, BRKOVRD_POSS, and DIST_BRKOVRD PIDs for recent simultaneous brake pedal and accelerator pedal operation. ADVISE the customer that simultaneous brake pedal and accelerator pedal operation by the vehicle operator activates the brake over accelerator feature. REFER to POWERTRAIN CONTROL SOFTWARE for additional information. |
Chart 2
- Starting Concerns: Hard Start/Long Crank/Erratic Start/Erratic Crank
Chart 3
- Starting Concerns: No Start (Engine Cranks)
Note. An extended crank because of a no start may load the exhaust system with raw fuel, damaging the catalytic converter after the engine starts.
| SYSTEM/COMPONENT | REFERENCE ( PINPOINT TESTS unless noted) |
|---|
| Add-on Anti-Theft Devices | Visual. CHECK with the customer. |
| Fuel/Ignition | GO to PINPOINT TEST A . |
| Exhaust System Restrictions | GO to PINPOINT TEST HF . |
| Base Engine | REFER to the appropriate Engine System - General Information article and CARRY OUT the Inspection and Verification to continue diagnosis. |
| Additional Testing | GO to PINPOINT TEST Z . |
Chart 4
- Unique Idle Concerns: Slow Return To Idle
Chart 5
- Unique Idle Concerns: Fast Idle
- Diesels/Runs On
Note. If the vehicle runs normally with the ignition in the OFF position, check for a damaged ignition switch, an IGN START/RUN or ISP-R circuit short to voltage, or a VPWR circuit short to voltage.
| SYSTEM/COMPONENT | REFERENCE ( PINPOINT TESTS unless noted) |
|---|
| Base Engine Check for air leaks, including correct sealing of intake manifold and components or vacuum lines attached to intake air (such as the PCV or EGR valve or vacuum lines). | Visual. REFER to the appropriate Engine System - General Information article and CARRY OUT the Inspection and Verification to continue diagnosis. |
| Verify the engine operates at normal temperature. | Visual. REFER to the appropriate Engine Cooling article or NO DIAGNOSTIC TROUBLE CODES (DTCS) PRESENT SYMPTOM CHART INDEX , to diagnose any cooling system concerns that are present. |
| Intake Air System Leaks | GO to PINPOINT TEST HU . |
| Additional Testing | GO to PINPOINT TEST Z . |
Chart 6
- Unique Idle Concerns: Low/Slow Idle
- Stalls/Quits: Deceleration
| SYSTEM/COMPONENT | REFERENCE ( PINPOINT TESTS unless noted) |
|---|
| Verify the fuel filler cap is correctly tightened or the capless fuel tank filler pipe is correctly sealed. | Visual. |
| Automatic Transmission (stalls/quits on deceleration) | REFER to the appropriate Automatic Transaxle/Transmission article to diagnose the torque convertor operation concerns. |
| Fuel Delivery System | GO to PINPOINT TEST HC . |
| Intake Air System | GO to PINPOINT TEST HU . |
| Charging System | REFER to the appropriate Charging System article and CARRY OUT the Inspection and Verification to continue diagnosis. |
| Universal Heated Oxygen Sensor (HO2S) | For E-Series 4.6L, E-Series 5.4L, Edge, Escape, Expedition, Explorer, F-150, F-Series Super Duty, Flex, Focus, Fusion 2.5L, Fusion 3.0L, MKS, MKT, MKX, Mustang, Navigator, and Taurus, GO to PINPOINT TEST DZ . |
| Base Engine | REFER to the appropriate Engine System - General Information article and CARRY OUT the Inspection and Verification to continue diagnosis. |
| Additional Testing | GO to PINPOINT TEST Z . |
Chart 7
| SYSTEM/COMPONENT | REFERENCE ( PINPOINT TESTS unless noted) |
|---|
| Secondary Ignition | For vehicles equipped with a coil pack ignition system, GO to PINPOINT TEST JC . For all others, GO to PINPOINT TEST JB . |
| Fuel Delivery System | GO to PINPOINT TEST HC . |
| Base Engine | REFER to the appropriate Engine System - General Information article and CARRY OUT the Inspection and Verification to continue diagnosis. |
| Exhaust System | GO to PINPOINT TEST HF . |
| Additional Testing | GO to PINPOINT TEST Z . |
Chart 8
Note. Verify the symptom is reported under normal driving conditions without excessive engine or vehicle load. Also, be aware of the engine RPM/speed limiting functions of the PCM.
Note. For vehicles equipped with a knock sensor (KS), a lack of power may result when the vehicle is operated with a breakout box installed at the PCM. The KS circuits are not shielded in a breakout box, and KS signal noise may be noticed by the PCM. If this happens, spark timing is retarded and a lack of power may result.
Note. For applications with a KS, a lack of power may result if the engine has developed an abnormal noise. The KS may interpret some abnormal noise as detonation and retard spark timing.
| SYSTEM/COMPONENT | REFERENCE ( PINPOINT TESTS unless noted) |
|---|
| Automatic Transmission Fluid | Visual. |
| Air Cleaner Element | Visual. |
| Check the following PIDS: LONGFT1/LONGFT2 (value between -20 and +20%) IMTV_F (if equipped): For both ignition ON, engine OFF and ignition ON, engine running with the transmission in PARK/NEUTRAL and the engine RPM greater than 3, 000 RPM, the PID should indicate NO FAULT in both situations. | LONGFT1/LONGFT2 value low (-): Continue diagnosis. Concentrate checks in areas that would cause the engine to run rich. LONGFT1/LONGFT2 value high (+): Continue diagnosis. Concentrate checks in areas that would cause the engine to run lean. IMTV_F PID indicates a fault: GO to PINPOINT TEST HU . |
| Fuel Delivery System | GO to PINPOINT TEST HC . |
| Secondary Ignition | For vehicles equipped with a coil pack ignition system, GO to PINPOINT TEST JC . For all others, GO to PINPOINT TEST JB . |
| Mass Airflow (MAF) Sensor | GO to PINPOINT TEST DC . |
| Exhaust System | GO to PINPOINT TEST HF . |
| Variable Camshaft Timing (VCT) System | GO to PINPOINT TEST HK . |
| Accelerator Pedal Position (APP) Sensor | GO to PINPOINT TEST DK . |
| Base Engine | REFER to the appropriate Engine System - General Information article and CARRY OUT the Inspection and Verification to continue diagnosis. |
| Automatic Transmission | REFER to the appropriate Automatic Transaxle/Transmission article, Shift Point Road Test to continue diagnosis. |
| Brake System Drag or Binding | REFER to the appropriate Brake System - General Information. |
| Supercharger Bypass System | GO to PINPOINT TEST KJ . |
| Turbocharger System | GO to PINPOINT TEST HN . |
| Additional Testing | GO to PINPOINT TEST Z . |
| Additional Checks: Some vehicles have a TQ_CNTRL PID available. Check this PID to determine if the PCM is reducing torque. The TQ_CNTRL PID may indicate which component or system, if any, is requesting a torque reduction. Customer driving habits Correct PCM vehicle identification (VID) block information. Refer to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) to carry out the Making Changes to the VID Block procedure. Clutch (M/T) Charging system Engine RPM or speed limiting functions of the PCM (look for incorrect high vehicle speed signal from ABS, VSS, or OSS) | Visual. REFER to appropriate Service Information article . |
| Brake Over Accelerator | CHECK for simultaneous brake pedal and accelerator pedal operation inadvertently activating the brake over accelerator feature. CHECK the BRKOVR_ACTION, BRKOVRD_POSS, and DIST_BRKOVRD PIDs for recent simultaneous brake pedal and accelerator pedal operation. ADVISE the customer that simultaneous brake pedal and accelerator pedal operation by the vehicle operator activates the brake over accelerator feature. REFER to POWERTRAIN CONTROL SOFTWARE for additional information. |
Chart 9
Note. Carbon build up in the combustion chamber and on the back of valves can be a contributing factor for engine spark knock concerns. Remove carbon deposits prior to any component replacements.
| SYSTEM/COMPONENT | REFERENCE ( PINPOINT TESTS unless noted) |
|---|
| Verify the engine operates at normal temperature | Visual. REFER to the appropriate Engine Cooling article, The Engine Overheats or NO DIAGNOSTIC TROUBLE CODES (DTCS) PRESENT SYMPTOM CHART INDEX to diagnose any cooling system concerns that are present. |
| Verify correct coolant level and coolant concentration | REFER to the appropriate Engine Cooling article, Cooling System Draining, Filling and Bleeding for correct coolant concentrations and fill procedures. |
| Mass Airflow (MAF) Sensor | GO to PINPOINT TEST DC . |
| Base Engine | REFER to the appropriate Engine System - General Information article and CARRY OUT the Inspection and Verification to continue diagnosis. |
| Fuel Delivery System | GO to PINPOINT TEST HC . |
| Secondary Ignition System | For vehicles equipped with a coil pack ignition system, GO to PINPOINT TEST JC . For all others, GO to PINPOINT TEST JB . |
| Positive Crankcase Ventilation (PCV) System | GO to PINPOINT TEST HG . |
| Engine Oil Quality | Visual. |
| Additional Testing | GO to PINPOINT TEST Z . |
Chart 10
Note. Driving styles may have a significant influence on fuel economy. Verify the concern before starting an in-depth diagnosis. If available, use the integrated diagnostic system (IDS) fuel economy test to verify a concern is present. The following external factors may contribute to poor fuel economy
- stop and go driving
- incorrect tire pressure and size
- vehicle loads (such as trailer towing)
- extended winter warm-up conditions
- high speed driving
- incorrect axle ratio
- road or weather conditions
- aftermarket add-ons
- short run operations
- customer expectations
| SYSTEM/COMPONENT | REFERENCE ( PINPOINT TESTS unless noted) |
|---|
| Check the following PIDs: LONGFT1/LONGFT2 (value between -20 and +20%) VPWR (value between 10 and 17.0 volts, and within 0.5 volt of battery voltage) | LONGFT1/LONGFT2 value low (-): Continue diagnosis. Concentrate checks in areas that would cause the engine to run rich. LONGFT1/LONGFT2 value high (+): Continue diagnosis. Concentrate checks in areas that would cause the engine to run lean. VPWR not between 10 and 17.0 volts: REFER to the appropriate Charging System article and CARRY OUT the Inspection and Verification to continue diagnosis. VPWR between 10 and 17.0 volts, but not within 0.5 volt of battery voltage: CHECK the B+ voltage to the PCM power relay. CHECK the VPWR circuit between the PCM and the PCM power relay. CHECK the PWR GND circuits. |
| Verify the engine operates at normal temperature. | Visual. REFER to the appropriate Engine Cooling article, Symptom Chart to diagnose any cooling system concerns that are present. |
| Transmission Fluid Level | Visual. |
| Secondary Ignition System | For vehicles equipped with a coil pack ignition system, GO to PINPOINT TEST JC . For all others, GO to PINPOINT TEST JB . |
| Fuel System | GO to PINPOINT TEST HC . |
| Exhaust System | GO to PINPOINT TEST HF . |
| Variable Camshaft Timing (VCT) System | GO to PINPOINT TEST HK . |
| Automatic Transmission | REFER to the appropriate Automatic Transaxle/Transmission article, Diagnosis By Symptom to continue diagnosis. |
| Positive Crankcase Ventilation (PCV) System | GO to PINPOINT TEST HG . |
| Grille Shutter | REFER to the appropriate Front End Body Panels article to continue diagnosis. |
| Additional Checks: Correct PCM VID block information. Refer to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) to CARRY OUT the Making Changes to the VID Block procedure. Brake drag Base engine concerns Incorrect PCV valve Contaminated MAF sensor Intake air system | REFER to appropriate Service Information article . |
| Additional | Testing GO to PINPOINT TEST Z . |
Chart 11
Chart 12
- Warning Indicators: Check Fuel Cap Indicator, Malfunction Indicator Lamp (MIL), Power Take Off (PTO), Temperature Warning Indicator or Gauge (applications with cylinder head temperature [CHT] sensor only), Transmission Control Indicator Lamp (TCIL), Powertrain Malfunction Indicator (Wrench)
- PTO Concerns: Not Working Correctly
Note. If the symptom is both a MIL on and exhaust emission test failure, GO directly to Chart 11. If the engine is a no start, GO directly to Chart 3. If the engine runs rough at idle, GO directly to Chart 1.
| SYSTEM/COMPONENT | REFERENCE ( PINPOINT TESTS unless noted) |
|---|
| Verify the fuel filler cap is correctly tightened or the capless fuel tank filler pipe is correctly sealed. | Visual. |
| Check Fuel Cap Indicator Never/always on | REFER to the appropriate Instrumentation, Message Center, and Warning Chimes article, to diagnose the check fuel cap indicator is never/always on or to diagnose the CHECK FUEL CAP warning is inoperative. |
| MIL Always on when the engine is running (no DTCs present) Never on (including during indicator prove out) | REFER to the appropriate Instrumentation, Message Center, and Warning Chimes article and CARRY OUT the Inspection and Verification to continue diagnosis. |
| PTO PTO indicator never/always on PTO not working correctly | GO to PINPOINT TEST FB . |
| Temperature Warning Indicator or Gauge (applications with CHT sensor only) Engine cooling system Indicator circuits | For an engine that is overheating, REFER to the appropriate Engine Cooling article to diagnose the engine overheating symptom. Be aware that since a PCM DTC is not present, the PCM is not attempting to activate the indicator. For an engine operating at normal temperature, GO to PINPOINT TEST DL . |
| TCIL Always on when the engine is running (no DTCs present) Never on | REFER to the appropriate Automatic Transaxle/Transmission External Controls article |
| Powertrain Malfunction Indicator (Wrench) Never/always on | REFER to the appropriate Instrumentation, Message Center, and Warning Chimes article to diagnose the wrench indicator is never/always on or to diagnose the POWERTRAIN MALFUNCTION warning is inoperative. |
| Additional Testing | GO to PINPOINT TEST Z . |
Chart 13
- Automatic Transmission (A/T) Shift Concerns: Upshift, Downshift, Engagement
| SYSTEM/COMPONENT | REFERENCE ( PINPOINT TESTS unless noted) |
|---|
| Transmission | REFER to the appropriate Automatic Transaxle/Transmission article, Diagnosis and Testing to continue diagnosis. |
| Additional | Tests GO to PINPOINT TEST Z . |
Chart 14
- Instrumentation: Tachometer Inoperative, Speedometer/Odometer Inoperative, Boost Gauge Indicates Higher Than Normal Boost, Fuel Gauge Inoperative
| SYSTEM/COMPONENT | REFERENCE ( PINPOINT TESTS unless noted) |
|---|
| Tachometer | Inoperative REFER to the appropriate Instrumentation, Message Center, and Warning Chimes article to diagnose the incorrect tachometer indication. |
| Speedometer/Odometer Inoperative | REFER to the appropriate Instrumentation, Message Center, and Warning Chimes article to diagnose the inoperative speedometer/odometer. |
| Boost Gauge (for vehicles equipped with a supercharger) Indicates higher than normal boost | For supercharger bypass control concerns, GO to PINPOINT TEST KJ . For charge air cooler (CAC) system concerns, GO to PINPOINT TEST KP . |
| Fuel Gauge Inoperative Fuel gauge always indicates full or empty | REFER to the appropriate Instrumentation, Message Center, and Warning Chimes article to diagnose the incorrect fuel gauge indication. |
| Instrumentation | REFER to the appropriate Instrumentation, Message Center, and Warning Chimes article. |
Chart 15
- Oil System Concerns: High Oil Consumption, Leaks
| SYSTEM/COMPONENT | REFERENCE ( PINPOINT TESTS unless noted) |
|---|
| Positive Crankcase Ventilation (PCV) System | GO to PINPOINT TEST HG . |
| Base Engine | REFER to the appropriate Engine System - General Information and CARRY OUT the Inspection and Verification to continue diagnosis. |
| Additional Checks External leaks Correct dipstick Correct oil viscosity Turbocharger System | Visual. |
Chart 16
- Cooling System Concerns: Electric Cooling Fan Does Not Operate (Low, High or Variable Speed), Cooling Fan Clutch Does Not Operate
| SYSTEM/COMPONENT | REFERENCE ( PINPOINT TESTS unless noted) |
|---|
| Electric Cooling Fan | For Edge, Explorer, Flex, Fusion, MKS, MKT, MKX, MKZ, and Taurus, GO to PINPOINT TEST KN . For all others, GO to PINPOINT TEST KF . |
| Cooling Fan Clutch | GO to PINPOINT TEST HV . |
| Cooling System | REFER to the appropriate Engine Cooling article to diagnose the cooling system concern. |
Chart 17
- Cooling System Concerns: Electric Cooling Fan Always Runs
Note. This chart is only intended to diagnose an electric cooling fan that always runs with a cool engine and the A/C and defroster off.
| SYSTEM/COMPONENT | REFERENCE ( PINPOINT TESTS unless noted) |
|---|
| Cooling Fan | For Edge, Explorer, Flex, Fusion, MKS, MKT, MKX, MKZ, and Taurus, GO to PINPOINT TEST KN . For all others, GO to PINPOINT TEST KF . |
| Cooling System | REFER to the appropriate Engine Cooling article. The Engine Overheats to diagnose the cooling system concern. |
Chart 18
- Exhaust System Concerns: Visible Smoke
Note. Black smoke indicates a rich fuel mixture, blue smoke indicates burning oil, and white smoke indicates water in the combustion chamber.
| SYSTEM/COMPONENT | REFERENCE ( PINPOINT TESTS unless noted) |
|---|
| Base Engine | REFER to the appropriate Engine System - General Information article and CARRY OUT the Inspection and Verification to continue diagnosis. |
| Fuel Delivery System Black smoke | GO to PINPOINT TEST HC . |
| Ignition System Black smoke | For vehicles equipped with a coil pack ignition system, GO to PINPOINT TEST JC . For all others, GO to PINPOINT TEST JB . |
| Positive Crankcase Ventilation (PCV) System Blue smoke | REFER to the appropriate Engine System - General Information article for a description of the Oil Consumption Test. |
| Turbocharger System Blue smoke | REFER to the appropriate Fuel Charging and Controls article - Turbocharger for the Oil Consumption Test. |
Chart 19
- Fuel System Concerns: Odor, Engine Compartment
Chart 20
- Engine Noise (under hood)
| SYSTEM/COMPONENT | REFERENCE ( PINPOINT TESTS unless noted) |
|---|
| Secondary Ignition System Snap noise that may be due to secondary ignition arcing. | For vehicles equipped with a coil pack ignition system, GO to PINPOINT TEST JC . For all others, CHECK the condition of the spark plug boots. |
| Turbocharger System | REFER to the appropriate Fuel Charging and Controls article - Turbocharger to diagnose the turbocharger noise. |
Chart 21
- Exhaust System Concerns: Odor (Sulfur or Rotten Egg Smell)
Note. A slight sulfur smell may be normal. Catalysts with less than 8, 000-16, 000 kilometers (5, 000-10, 000 miles), either from a new vehicle or new catalyst, are likely to have a sulfur smell due to the highly active state of new catalysts. Installing a new catalyst may actually make the symptom worse.
Chart 22
- Starting Concerns: No Crank
| SYSTEM/COMPONENT | REFERENCE ( PINPOINT TESTS unless noted) |
|---|
| Add-on Anti-Theft Devices | Visual. CHECK with the customer. |
| Anti-Theft | REFER to the appropriate Anti-Theft - Passive Anti-Theft System (PATS) article and diagnose the vehicle does not start symptom. |
| Base Engine Starting system | REFER to the appropriate Starting System article and diagnose the engine does not crank symptom. |
