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Driveability - Gas - Non-Dtc Based Diagnostics: Diagnosis Dodge Dart PF

Testing & Diagnostics ~5120 words

DIAGNOSTIC TEST

  1. GENERATOR FULL FIELD TEST NOTE: Diagnose and repair any Generator sense or Generator field control circuit DTCs before proceeding with this test. Start the engine and allow it to idle. WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death. With the scan tool, perform the Generator Full Field test. Follow the instructions displayed on the scan tool. Monitor the system (battery) voltage and the Generator sense voltage on the scan tool while performing the test. NOTE: With the engine running, the difference between the system (battery) voltage and the Generator sense voltage should be below 0.2 volts. NOTE: With the generator field fully actuated, the system (battery) voltage should be above 14.0 volts. NOTE: With the generator field actuated off, the system (battery) voltage should be below 13.0 volts and eventually drop as battery load is increased. Did the system voltage change as described above during the Generator Full Field test? Yes Test complete. No Go To 2
  2. CHARGING SYSTEM INSPECTION Turn the ignition off. Inspect and load test the battery in accordance with the Service Information. Inspect the Generator drive belt for proper alignment and adjustment. Inspect the vehicle for aftermarket accessories that may exceed the generator system output. Inspect the fuses. If an open fuse is found, use the wire diagram/schematics as a guide and inspect the wiring and connectors for a damaged or shorted circuit. Were any problems found? Yes Repair as necessary. No Go To 3
  3. (A801) GENERATOR OUTPUT CIRCUIT HIGH RESISTANCE NOTE: Make sure all testing equipment and cables are clear of any engine parts before starting the engine. Start the engine. WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in possible serious or fatal injury. Measure the voltage between the B (+) Terminal at the Generator and the Battery Positive (+) Post. Is the voltage below 0.1 volts? Yes Go To 4 No Repair the (A801) Generator Output circuit between the generator and battery for high resistance. Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance .
  4. GENERATOR CASE GROUND HIGH RESISTANCE Measure the voltage between the Generator case and the Battery Negative (-) post. Is the voltage below 0.1 volts? Yes Go To 5 No Repair the Generator Case ground for high resistance. Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance .
  5. CHECK THE (A804) GENERATOR SENSE CIRCUIT HIGH RESISTANCE Turn the ignition off. Disconnect the PCM C2 harness connector. Disconnect the Generator harness connector. Measure the resistance of the (A804) Generator Sense circuit between the Generator harness connector and the appropriate terminal of the PCM C2 harness connector. Is the resistance below 5.0 Ohms? Yes Go To 6 No Repair the (A804) Generator Sense circuit for high resistance. Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance .
  6. GENERATOR Turn the ignition off. Reconnect the PCM harness connectors. Disconnect the Generator harness connector. Connect a 12-volt test light between ground and the (K20) Generator Field Control circuit in the Generator harness connector. Turn the ignition on. With the scan tool, actuate the Alternator Field Control State to toggle. NOTE: The test light should toggle on and off with the actuation. NOTE: If a DTC is active, the actuation test may not be allowed by the PCM. If may be necessary to clear DTCs before starting the actuation. Does the test light illuminate on and off with the actuation? Yes Replace the Generator in accordance with the service information. Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance . No Go To 7
  7. (K20) GENERATOR FIELD CONTROL CIRCUIT SHORTED TO VOLTAGE Turn the ignition off. Disconnect the PCM C2 harness connector. Turn the ignition on. Measure the voltage of the (K20) Generator Field Control circuit in the Generator harness connector. Is there any voltage present? Yes Repair the (K20) Generator Field Control circuit for a short to voltage. Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance . No Go To 8
  8. (K20) GENERATOR FIELD CONTROL CIRCUIT SHORTED TO GROUND Turn the ignition off. Measure the resistance between ground and the (K20) Generator Field Control circuit in the Generator harness connector. Is the resistance above 10k Ohms? Yes Go To 9 No Repair the (K20) Generator Field Control circuit for a short to ground. Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance .
  9. (K20) GENERATOR FIELD CONTROL CIRCUIT OPEN OR HIGH RESISTANCE Measure the resistance of the (K20) Generator Field Control circuit between the Generator harness connector and the appropriate terminal of PCM C2 harness connector. Is the resistance below 5.0 Ohms? Yes Go To 10 No Repair the (K20) Generator Field Control circuit for an open or high resistance. Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance .
  10. CHECKING THE PCM POWER AND GROUND CIRCUITS Perform the diagnostic procedure for CHECKING THE PCM POWER AND GROUND CIRCUITS. Were any problems found? Yes Repair the PCM power and ground circuit(s) as necessary. Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance . No Go To 11
  11. POWERTRAIN CONTROL MODULE (PCM) Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Generator and the Powertrain Control Module (PCM). Look for any chafed, pierced, pinched or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Perform any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance . No Replace and program the Powertrain Control Module (PCM) in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(ref-646224-S21304088122014072800000) . Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance .

CHECKING THE ENGINE MECHANICAL SYSTEM

  1. Turn the ignition off.
  2. Check for any of the following conditions/mechanical problems: ENGINE VACUUM - must be at least 13 inches in neutral ENGINE VALVE TIMING - must be within specifications ENGINE COMPRESSION - must be within specifications CYLINDER LEAKAGE TEST - must be within specifications ENGINE EXHAUST SYSTEM - must be free of any restrictions or leaks ENGINE PCV SYSTEM - must flow freely TORQUE CONVERTER STALL SPEED - must be within specifications POWER BRAKE BOOSTER - no internal vacuum leaks FUEL - must be free of contamination VALVE SPRINGS - cannot be weak or broken CAM LOBES - must not be worn excessively CAM SHAFTS - must not be worn or have excessive end play Are there any engine mechanical problems? Yes Repair as necessary in accordance with the Service Information. Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance . No Test Complete.

CHECKING THE EXHAUST SYSTEM FOR LEAKS

  1. Turn the ignition off.
  2. Raise the vehicle in accordance with the service information. WARNING: The normal operating temperature of the exhaust system is very high. Never work around or attempt to service any part of the exhaust system until it has cooled. Special care should be taken when working near the catalytic converter. The temperature of the converter rises to a high level after a short period of engine operating time.
  3. Connect Exhaust Cone (special tool #8404-ECT, Exhaust Cone, Truck) to Air Pressure Regulator (with hose) W-18-MIL-1146AS. CAUTION: The air pressure must not exceed 27.6 kPa (4 psi), otherwise engine damage can occur.
  4. Attach shop air to the air pressure regulator.
  5. Adjust the Air Pressure Regulator to 27.6 kPa (4 psi)
  6. Insert the exhaust cone into the vehicle tail pipe.
  7. If the vehicle is equipped with dual exhaust. Use the (special tool #8404-ECT, Exhaust Cone, Truck) with equipped attached plug, plug one side of the dual exhaust pipe. Pressurize the other as described above.
  8. Apply Mopar® Air Leak Detector PN 05191804AA (or an equivalent leak finder liquid) to the following areas: All welded joints from the exhaust manifold to 45.72 cm (18 inches) behind the downstream O2 Sensor O2 Sensor seal points O2 Sensor boss welds Flange/joint connection(s) Exhaust manifold to cylinder head connection(s) EGR solenoid gasket base and tube seal points (if equipped)
  9. Watch for the Mopar® Air Leak Detector PN 05191804AA (or the equivalent leak finder liquid) to bubble.
  10. Use the following definitions to help determine if system or component repair/replacement is necessary: Type 1 Leak is defined as a leak where very small foam like bubbles 1 mm (0.04 of an inch) or less appear. Any Type 1 or greater leaks found in welded joints, O2 sensor seal points or O2 sensor boss welds must be repaired or the component must be replaced. Type 2 Leak is defined as a leak where larger bubbles pea size, 8 mm (0.3 of an inch) or greater appear. Any Type 2 or greater leaks found in flange or joint connections, exhaust manifold to cylinder head connections, or EGR gasket and tube seal points must be repaired or the components must be replaced. Leak Location Repair required if results at 27.6 kPa (4 psi) reveal bubble size: Welded joints Type 1, 1 mm (0.04 of an inch) or greater O2 Sensor seal points Type 1, 1 mm (0.04 of an inch) or greater O2 Sensor boss welds Type 1, 1 mm (0.04 of an inch) or greater Flange/joint connections Type 2, 8 mm (0.3 of an inch) or greater Exhaust Manifold to cylinder head connections Type 2, 8 mm (0.3 of an inch) or greater EGR gasket and tube seal points Type 2, 8 mm (0.3 of an inch) or greater
  11. If a leak is found that matches the above definition, repair or replace the component as necessary.
  12. Once the repair is complete, repeat the procedure to verify that all leaks have been repaired. Were any exhaust leaks found? Yes Repair or replace the leaking exhaust parts as necessary. Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance . No Test complete.
  1. IGNITION COIL WIRING OR CONNECTORS NOTE: Diagnose and repair any ignition coil, CMP sensor, or CKP sensor DTCs before proceeding with this test. Turn the ignition off. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Ignition Coil for the cylinder being tested and the PCM. Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. NOTE: If the vehicle is not equipped with the coil on plug ignition system, check the resistance of the ignition wire(s) before checking the cylinder with a spark tester. The resistance should be below 10k ohms. Were any problems found? Yes Repair as necessary in accordance with the service information. Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance . No Go To 2
  2. IGNITION COIL OPERATION NOTE: Inspect the ignition coil for damage, carbon tracking on the coil or a damaged spark plug insulator boot. If a problem is found, replace the ignition coil. NOTE: Some coils must have a spark tester installed on both sides of the coil during the following test. During the test, each side of the coil should output a crisp blue spark that is able to jump the gap of the spark tester. NOTE: On some engines, it may be necessary to remove the upper intake manifold to access the ignition coils. Once the ignition coil has been removed, the intake must be installed in order to crank the engine. Move the ignition coil harness connector through the slots in the upper intake and then connect the coil to the harness connector. Secure the upper intake to the lower intake in accordance with the Service Information. Turn the ignition off. If the vehicle is equipped with coil on plug ignition system, remove the ignition coil for the cylinder being tested. Disconnect the fuel injector harness connector for the cylinder being tested. For coil on plug ignition systems, install a spark tester(s) on the ignition coil, otherwise install the spark tester to the ignition wire. While cranking the engine observe the spark coming from the spark tester. NOTE: A crisp blue spark that jumps the gap of the spark tester should be generated. Is good spark present? Yes Go To 7 No Go To 3
  3. ASD RELAY OUTPUT CIRCUIT OPEN OR HIGH RESISTANCE Turn the ignition off. Disconnect the Ignition Coil harness connector. Turn the ignition on. With the scan tool, actuate the ASD Relay to on. Using a 12 volt test light connected to ground, check the ASD Relay output circuit in the ignition coil harness connector. NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery. Is the test light illuminated and bright during the actuation? Yes Go To 4 No Repair the ASD Relay output circuit for an open circuit or high resistance. Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance .
  4. IGNITION COIL WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in possible serious or fatal injury. Using a 12 volt test light connected to 12 volts, check the Ignition Coil control circuit for the cylinder being tested in the Ignition Coil harness connector. Crank the engine for five seconds. NOTE: The test light should blink each time the circuit is activated by the PCM. Does the test light blink each time the circuit is activated by the PCM? Yes Replace the Ignition Coil in accordance with the service information. Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance . No Go To 5
  5. IGNITION COIL CONTROL CIRCUIT OPEN OR HIGH RESISTANCE Measure the resistance of the Ignition Coil control circuit for the cylinder being tested between the Ignition Coil harness connector and the PCM harness connector. Is the resistance below 5.0 Ohms? Yes Go To 6 No Repair the Ignition Coil control circuit for an open or high resistance. Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance .
  6. POWERTRAIN CONTROL MODULE (PCM) Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Ignition Coil for the cylinder being tested and the PCM. Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Perform any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance . No Replace and program the Powertrain Control Module (PCM) in accordance with the service information. Refer to «MODULE, POWERTRAIN CONTROL, REMOVAL»(ref-646224-S21304088122014072800000) . Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance .
  7. SPARK PLUG(S) Turn the ignition off. Remove the spark plug. Inspect the spark plug for any of the following conditions: Cracks or damage Carbon tracking Foreign material Gap not within specification Loose or broken electrode Fuel fouled NOTE: Lightly tap the bottom of the spark plug on a solid surface. The electrode in the spark plug should not move. Were any problems found? Yes Replace the spark plug. Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance . No Test Complete.
  1. MAP SENSOR WIRING OR CONNECTORS NOTE: Diagnose and repair any MAP Sensor circuit DTCs before proceeding with this test. NOTE: Diagnose and repair any sensor supply or system voltage DTCs before proceeding with this test. Turn the ignition off. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the MAP Sensor and the PCM. Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Turn the ignition on. Monitor the scan tool data relative to the sensor and wiggle test the wiring and connectors. Look for the data to change or for a DTC to set during the wiggle test. If necessary, check each sensor circuit for high resistance or a shorted condition. Were any problems found? Yes Repair as necessary in accordance with the Service Information. Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance . No Go To 2
  2. MAP VACUUM/BAROMETRIC PRESSURE With a scan tool, read the Barometric Pressure. NOTE: The Barometric Pressure should be approximately equal to the actual barometric pressure. If necessary, compare the Barometric Pressure value of the tested vehicle to the value of a known good vehicle of a similar make and model. Connect a vacuum gauge to a manifold vacuum source. Start the engine. NOTE: If the engine will not idle, maintain a constant RPM above idle. WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in possible serious or fatal injury. With the scan tool, read the MAP Sensor value. NOTE: The scan tool reading for MAP vacuum should be within 1" of the vacuum gauge reading. Were any problems found? Yes Go To 4 No Go To 3
  3. CHECK THE MAP SENSOR VOLTAGE With the scan tool, monitor the MAP Sensor signal voltage. With the engine idling in neutral or park, snap the throttle. NOTE: The MAP Sensor signal voltage should change from below 2.0 volts at idle to above 3.5 volts at wide open throttle. Were any problems found? Yes Go To 4 No Test complete.
  4. CHECK THE 5-VOLT SUPPLY CIRCUIT FOR HIGH RESISTANCE Turn the ignition off. Using a voltmeter, perform a voltage drop test on the MAP Sensor 5-Volt Supply circuit between the MAP Sensor harness connector and the PCM harness connector. Make sure the voltmeter leads are connected so that positive polarity is displayed on the voltmeter. WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in possible serious or fatal injury. Start the engine. Is the voltage reading below 0.1 volt? Yes Go To 5 No Repair the 5-Volt Supply circuit for excessive resistance. Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance .
  5. CHECK THE MAP SENSOR SIGNAL CIRCUIT FOR HIGH RESISTANCE Turn the ignition off. Using a voltmeter, perform a voltage drop test on the MAP Sensor Signal circuit between the MAP Sensor harness connector and the PCM harness connector. Make sure the voltmeter leads are connected so that positive polarity is displayed on the voltmeter. WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in possible serious or fatal injury. Start the engine. Is the voltage reading below 0.1 volt? Yes Go To 6 No Repair the MAP Sensor Signal circuit for excessive resistance. Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance .
  6. CHECK THE MAP SENSOR GROUND CIRCUIT FOR HIGH RESISTANCE Turn the ignition off. Using a voltmeter, perform a voltage drop test on the MAP Sensor Ground circuit between the MAP Sensor harness connector and the PCM harness connector. Make sure the voltmeter leads are connected so that positive polarity is displayed on the voltmeter. WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in possible serious or fatal injury. Start the engine. Is the voltage below 0.1 volt? Yes Go To 7 No Repair the MAP Sensor Ground circuit for excessive resistance. Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance .
  7. MAP SENSOR Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the MAP Sensor and the Powertrain Control Module (PCM). Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Perform any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance . No Replace the MAP Sensor in accordance with the service information. Refer to «SENSOR, MANIFOLD AIR PRESSURE (MAP), REMOVAL»(ref-646230-S40859222602014072800000) . Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance .
  1. VERIFY O2 SENSOR OPERATION Start the engine. Allow the engine to reach normal operating temperature. With the scan tool, select and graph the O2 Sensor suspected of not performing correctly. Review the 3 sample videos of O2 Sensor operation to determine which graph best matches what is displayed on the scan tool for the vehicle. Which video best matches the graph displayed on the scan tool? Video 1 (Normal operation) A multimedia supplement to the instructions contained in this article is available. To view the multimedia example of the condition described go to; http://www.youtube.com/user/Mitchell1Tips then type "A00646310.vid2" into the "Search Channel" box. Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to appropriate Testing & Diagnostics article under Engine Performance . Video 2 (Rich operation) A multimedia supplement to the instructions contained in this article is available. To view the multimedia example of the condition described go to; http://www.youtube.com/user/Mitchell1Tips then type "A00646310.vid3" into the "Search Channel" box. Go To 2 Video 3 (Lean operation) A multimedia supplement to the instructions contained in this article is available. To view the multimedia example of the condition described go to; http://www.youtube.com/user/Mitchell1Tips then type "A00646310.vid4" into the "Search Channel" box. Go To 3
  2. TESTING FOR RICH O2 SENSOR OPERATION Start the engine. With the scan tool, select and graph the O2 Sensor suspected of not performing correctly. Disconnect engine vacuum lines to create a lean running condition. With the engine vacuum lines disconnected monitor the O2 Sensor graph on the scan tool. Did the O2 Sensor graph show a change from rich to lean? Yes Check for any of the following conditions/mechanical problems that can cause a O2 Sensor stuck rich condition: AFTERMARKET equipment or software effecting emissions. AIR INDUCTION SYSTEM - must be free from blockage. ENGINE VALVE TIMING - must be within specifications. ENGINE COMPRESSION - must be within specifications. ENGINE EXHAUST SYSTEM - must be free of any restrictions or leaks. ENGINE PCV SYSTEM - must flow freely. FUEL - must be free of contamination. FUEL INJECTOR - plugged, stuck open or restricted injector. No Replace the Oxygen Sensor in accordance with the Service Information. Refer to «SENSOR, OXYGEN, REMOVAL»(ref-646230-S13401513602014072800000) . Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance .
  3. TESTING FOR LEAN O2 SENSOR OPERATION Start the engine. With the scan tool, select and graph the O2 Sensor suspected of not performing correctly. Create a rich running condition. With the rich running condition, monitor the O2 Sensor graph on the scan tool. Did the O2 Sensor graph show a change from lean to rich? Yes AFTERMARKET equipment or software effecting emissions. AIR INDUCTION SYSTEM - must be free from leaks. ENGINE VACUUM - must be at least 13 inches in neutral. ENGINE VALVE TIMING - must be within specifications. ENGINE COMPRESSION - must be within specifications. ENGINE EXHAUST SYSTEM - must be free of any restrictions or leaks. ENGINE PCV SYSTEM - must be free of leaks and flow freely. POWER BRAKE BOOSTER - no internal vacuum leaks. FUEL - must be free of contamination. FUEL INJECTOR - plugged or restricted injector; control wire not connected to correct injector. No Replace the Oxygen Sensor in accordance with the Service Information. Refer to «SENSOR, OXYGEN, REMOVAL»(ref-646230-S13401513602014072800000) . Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance .
  1. PCM WIRING OR CONNECTORS Turn the ignition off. Using the wiring diagram/schematic as a guide, inspect the wiring and each connector at the PCM. Look for any chafed, pierced, pinched or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Were any problems found? Yes Repair as necessary. Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance . No Go To 2
  2. CHECK THE PCM GROUND CIRCUITS Turn the ignition off. Using a 12 volt test light connected to 12 volts, probe the PCM ground circuits. Wiggle test the wiring during the test to check for an intermittent open in the circuit. NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery. Is the test light illuminated and bright? Yes Go To 3 No Repair the PCM ground circuit(s) for an open or high resistance. Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance .
  3. CHECK THE PCM FUSED B+ CIRCUIT Using a 12 volt test light connected to ground, probe the PCM Fused B+ circuit. Wiggle test the wiring during the test to check for an intermittent open in the circuit. NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery. Is the test light illuminated and bright? Yes Go To 4 No Repair the PCM Fused B+ circuit for an open or high resistance. Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance .
  4. CHECK THE PCM FUSED IGNITION SWITCH CIRCUITS Turn the ignition on. Using a 12 volt test light connected to ground, probe the PCM Fused Ignition Switch circuit. Check the circuit with the ignition off, ignition on/engine not running position and during cranking. Wiggle test the wiring during the test to check for an intermittent open in the circuit. NOTE: The test light should be illuminated and bright with the ignition on and during cranking. The test light should not be illuminated with the ignition off. Compare the brightness to that of a direct connection to the battery. Is the test light illuminated as described above? Yes Test complete. No Repair the PCM Fused Ignition Switch circuit for as necessary. Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance .
  1. UNDERCHARGED BATTERY NOTE: Diagnose any 5-Volt Supply DTCs before continuing NOTE: The battery must be fully charged and in good condition. An undercharged battery may produce invalid test results. Test the battery in accordance with the Service Information. Were any problems found? Yes Charge or replace the battery as necessary and retest. Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance . No Go To 2
  2. SYSTEM DTCS PRESENT NOTE: If the battery was low, make sure the battery is properly charged and attempt to start the vehicle. Crank the engine for 15 seconds, 3 consecutive times. This will allow any DTCs to set that may have been erased due to a dead battery. With the scan tool, select System DTCs to read DTCs in all modules. If any DTCs are present, perform the appropriate diagnostic procedure before continuing with this test. If a no response condition is detected in any module, and perform the appropriate NO RESPONSE diagnostic procedure. Were any problems found? Yes Perform the appropriate diagnostic procedure and repair as necessary. If any pending DTCs are detected, perform the diagnostic procedure as if the DTC is active. Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance . No Go To 3
  3. PCM POWER OR GROUND CIRCUIT OPEN OR HIGH RESISTANCE Perform the CHECKING THE PCM POWER AND GROUND CIRCUIT test procedure. Refer to «CHECKING THE PCM POWER AND GROUND CIRCUITS»(ref-646310-S13178411072014072800000) . Were any problems found? Yes Repair as necessary in accordance with the service information. Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance . No Go To 4
  4. OPEN FUSE(S) Inspect all of the fuses in the Fuse Panel. If any open fuses are found, check the related circuit(s) for a short to ground or high resistance. Were any problems found? Yes Repair as necessary. Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance . No Go To 5
  5. CHECKING THE FUEL DELIVERY SYSTEM NOTE: Verify that the fuel tank is not empty before continuing. Perform the CHECKING THE FUEL DELIVERY SYSTEM test procedure. Refer to «CHECKING THE FUEL DELIVERY SYSTEM (HARD START)»(ref-646310-S24239867732014072800000) . Were any problems found? Yes Repair as necessary in accordance with the service information. Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance . No Go To 6
  6. FUEL CONTAMINATION Check the fuel system for contamination in accordance with the service information. Refer to «FUEL INJECTION, GAS, OPERATION»(ref-646230-S31872068632014072800000) . Was any evidence of fuel contamination found? Yes Clean and repair the fuel system as necessary in accordance with the Service Information. Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance . No Go To 7
  7. CHECKING THE IGNITION COIL OPERATION Perform the diagnostic procedure for CHECKING THE IGNITION COIL OPERATION. Refer to «CHECKING THE IGNITION COIL OPERATION»(ref-646310-S00438313422014072800000) . Were any problems found? Yes Repair as necessary in accordance with the service information. Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance . No Go To 8
  8. CHECKING THE ENGINE MECHANICAL SYSTEM Perform the diagnostic procedure for CHECKING THE ENGINE MECHANICAL SYSTEM. Refer to «CHECKING THE ENGINE MECHANICAL SYSTEM»(ref-646310-S09005368412014072800000) . Were any problems found? Yes Repair as necessary in accordance with the service information. Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Testing & Diagnostics article under Engine Performance . No Test complete. Perform any Technical Service Bulletins that may apply.

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