Dtcs P0203 to P0406: Diagnosis Dodge Nitro I

Diagnostic Test

1. ACTIVE DTC NOTE: Check for any TSBs that apply to a Misfire condition. Review the vehicle repair history for any misfire condition repairs that have been performed. Diagnose and repair any other active component or circuit DTCs before continuing with this procedure. Turn the ignition on. With the scan tool, select View DTCs. Copy DTC and Freeze Frame information. Start the engine and allow it to reach operating temperature. 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. NOTE: Attempt to operate the vehicle under conditions similar to which the DTC was set. NOTE: It may be necessary to test drive the vehicle within the DTC monitoring conditions in order for this DTC to set. With a scan tool, select View DTCs. Is the DTC Active at this time? Yes Go To 2 . No Refer to the «INTERMITTENT CONDITION»(ref-306207-S19641665412008120900000) Diagnostic Procedure.
2. VISUAL INSPECTION NOTE: Anything that affects the speed of the crankshaft can cause a misfire DTC. NOTE: When a Misfire is detected for a particular cylinder, the PCM will shut down that cylinder's Injector Control circuit. - Visually inspect the engine for any of the following conditions. - Worn serpentine belt - Binding Engine-Driven accessories: A/C Compressor, P/S Pump, Water pump. - Misalignment of the Water pump, P/S Pump and A/C Compressor pulleys - Corroded PCM power and ground circuits. - Improper CKP, CMP, MAP, and TP Sensor mounting - Poor connector/terminal to component connection. i.e, CKP sensor, Fuel Injector, Ignition coil, etc. - Vacuum leaks - Restricted Air Induction system or Exhaust system. - Internal engine component failures. Were any of the above conditions present? Yes Repair as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 3 .
3. (F342), (F344) ASD RELAY OUTPUT CIRCUIT Turn the ignition off. Disconnect the Ignition Coil harness connector of the misfiring cylinders. Disconnect the Fuel Injector harness connector of the misfiring cylinders. Ignition on, engine not running. With a scan tool, actuate the ASD Relay. Using a 12-volt test light connected to ground, probe the (F342), (F344) ASD Relay Output circuit in the Ignition Coil harness connector and Fuel Injector harness connector while the relay is actuating. Does the test light illuminate brightly? Yes Go To 4 . No Repair the excessive resistance or short to ground in the (F342), (F344) ASD Relay Output circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
4. IGNITION SYSTEM OPERATION 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. Turn the ignition off. Connect the Ignition Coil harness connector. Remove the Spark Plug wire/boot from the spark plug of the cylinder being tested. Leave the Fuel Injector harness connector of the cylinder being tested disconnected. Install a spark tester on the Spark plug wire/boot. While cranking the engine observe the spark coming from the spark tester. NOTE: A crisp blue spark that is able to jump the gap of the spark tester should be generated. Is good spark present? Yes Go To 5 . No Go To 14 . NOTE: Connect the Fuel Injector harness connector before continuing.
5. SPARK PLUG Turn the ignition off. Remove the Spark Plug. Inspect the Spark Plug for the following conditions. - Cracks - Carbon Tracking - Foreign Material - Gap size out of specifications - Loose or broken electrode NOTE: Lightly tap the bottom of the spark plug on a solid surface. The electrode in the spark plug should not move. Does the Spark Plug have any problems? Yes Replace the Spark Plug. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 6 .
6. FUEL PRESSURE CHECK WARNING: The fuel system is under a constant pressure (even with the engine off). Before testing or servicing any fuel system hose, fitting or line, the fuel system pressure must be released. Failure to follow these instructions can result in personal injury or death. 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. Turn the ignition off. Install a fuel pressure gauge to the fuel rail. Start the engine and observe the fuel pressure reading. NOTE: Fuel pressure specification is 407 kPa +/- 34 kPa (59 psi +/- 5 psi). Choose a conclusion that best matches your fuel pressure reading. Within Specification Go To 7 . Below Specification Go To 12 . Above Specification Replace the fuel filter/pressure regulator. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
7. FUEL PRESSURE LEAK DOWN NOTE: Before continuing visually and physically inspect the fuel delivery system for external leaks or damage. Repair/replace as necessary. WARNING: The fuel system is under a constant pressure (even with the engine off). Before testing or servicing any fuel system hose, fitting or line, the fuel system pressure must be released. Failure to follow these instructions can result in personal injury or death 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. Turn the ignition off. Install special tool #6539 (5/16") or #6631 (3/8") fuel line adapter. Install the fuel pressure gauge. Start the engine and allow the fuel system to reach maximum pressure. Turn the ignition off. NOTE: Fuel specification is 407 kPa +/- 34 kPa (59 psi +/- 5 psi). Using special tool #C4390, Hose Clamp Pliers, pinch the rubber fuel line between the fuel pressure gauge and the engine. Monitor the fuel pressure gauge for a minimum of 5 minutes. NOTE: The pressure should not fall below 241 kPa (35 psi) Does the pressure fall below the listed specification? Yes Replace the leaking Fuel Injector(s). Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 8 .
8. FUEL INJECTOR OPERATION WARNING: The fuel system is under a constant pressure (even with the engine off). Before testing or servicing any fuel system hose, fitting or line, the fuel system pressure must be released. Failure to follow these instructions can result in personal injury or death. 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. CAUTION: After each Fuel Injector actuation, start the engine to clean the cylinder of fuel. Failure to do so could cause engine damage. Remove special tool #C4390. Start the engine and allow the fuel pressure to reach maximum pressure. Ignition on, engine not running. Using the scan tool, actuate the Fuel Injector for the cylinder that indicated the misfire. Monitor the fuel pressure gauge. Does the fuel pressure gauge indicate a drop in fuel pressure? Yes Go To 9 . No Go To 10 . NOTE: Turn the ignition off, remove the Fuel Pressure gauge, and connect the fuel lines before continuing.
9. ENGINE MECHANICAL 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 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 CAM LOBES - must not be worn excessively CYLINDER LEAKAGE TEST - must be within specifications VALVE SPRINGS - cannot be weak or broken Are there any engine mechanical problems? Yes Repair as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 16 .
10. FUEL INJECTOR Turn the ignition off. Disconnect the Fuel Injector harness connector of one of the cylinders detecting a mis-fire. Ignition on, engine not running. NOTE: When a Misfire is detected for a particular cylinder, the PCM will shut down that cylinder's Injector Control circuit. With the scan tool, erase DTCs. Install an Injector Noid light. With the scan tool, actuate the Fuel Injector. Does the Noid light blink/flicker during the actuation? Yes Verify that there is good pin to terminal contact in the related Injector and the Powertrain Control Module connectors. If OK, replace the Fuel Injector. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 11 .
11. INJECTOR CONTROL CIRCUIT Turn the ignition off. Disconnect the Fuel Injector harness connector. Disconnect the PCM harness connectors. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis. Check the Injector Control circuit for an open, short to ground, and short to voltage. Was a problem found with the Injector Control circuit? Yes Repair the excessive resistance or short in the Injector Control circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 16 .
12. FUEL SUPPLY LINE RESTRICTED WARNING: The fuel system is under a constant pressure (even with the engine off). Before testing or servicing any fuel system hose, fitting or line, the fuel system pressure must be released. Failure to follow these instructions can result in personal injury or death. Turn the ignition off. Raise vehicle on hoist, and disconnect the fuel pressure line at the fuel pump module. Install special tool #6539 (5/16") #6631(3/8") fuel line adapter and the fuel pressure gauge between the fuel supply line and the fuel pump module. Ignition on, engine not running. With the scan tool, actuate the ASD Fuel System test and observe the fuel pressure gauge. NOTE: Fuel pressure specification is 407 kPa +/- 34 kPa (59 psi +/- 5 psi). Is the fuel pressure within specification? Yes Repair or replace fuel supply line as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 13 .
13. FUEL PUMP INLET STRAINER WARNING: The fuel system is under a constant pressure (even with the engine off). Before testing or servicing any fuel system hose, fitting or line, the fuel system pressure must be released. Failure to follow these instructions can result in personal injury or death. Turn the ignition off. Remove the Fuel Pump Module and inspect the Fuel Inlet Strainer. Is the Fuel Inlet Strainer plugged? Yes Replace the Fuel Pump Inlet Strainer. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Before continuing, check the Fuel Pump Module harness connector terminals for corrosion, damage, or terminal push out. Make sure the ground circuit is functional. Repair as necessary. Replace the Fuel Pump Module. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
14. 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 personal injury or death. Disconnect the Ignition Coil harness connector. Using a 12-volt test light connected to 12-volts, probe the Ignition Coil Control circuit. Crank the engine for 5 seconds while observing the test light. Does the test light brightly blink/flicker? Yes Verify that there is good pin to terminal contact in the related Coil and the Powertrain Control Module connectors. If OK, replace the Ignition Coil. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 15 .
15. COIL CONTROL CIRCUIT Turn the ignition off. Disconnect the Ignition Coil harness connector. Disconnect the PCM harness connectors. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis. Check the Coil Control circuit for an open, short to ground, and short to voltage. Was a problem found with the Coil Control circuit? Yes Repair the Coil Control circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 16 .
16. POWERTRAIN CONTROL MODULE (PCM) Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the related Sensor, Coil, Injector, 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. Verify that there is good pin to terminal contact in the related Sensors, Coils, Injectors, and the Powertrain Control Module connectors. Refer to any Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Replace and program the Powertrain Control Module per Service Information. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .

1. ACTIVE DTC Ignition on, engine not running. With a scan tool, select View DTCs and read and record the related Freeze Frame data. With a scan tool, clear DTCs, PCM battery disconnect to reset the PCM. Start the engine. If the MIL has not yet illuminated, test drive the vehicle to try to get the code to reset. Does the code reset while cranking or during the test drive? Yes Go To 2 . No Refer to the «INTERMITTENT CONDITION»(ref-306207-S19641665412008120900000) Diagnostic Procedure.
2. WIRE HARNESS INSPECTION Turn the ignition off. Visually inspect the CKP wire harness. Look for any chafed, pierced, pinched, or partially broken wires. Visually inspect the CKP wire harness connectors. Look for broken, bent, pushed out, or corroded terminals. Verify that there is good pin to terminal contact in the Sensor and Powertrain Control Module connectors. Make sure the Crankshaft Position Sensor is properly installed and the mounting bolt(s) are torqued to the proper specification. Were any of the above conditions present? Yes Repair as necessary Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 3 .
3. TONE WHEEL/FLEX PLATE INSPECTION Remove the Crankshaft Position Sensor. Inspect the Tone Wheel/Flex Plate slots for damage, foreign material, or excessive movement. Were any problems found? Yes Repair or replace the Tone Wheel/Flex Plate as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 4 .
4. CRANKSHAFT POSITION SENSOR If there are no possible causes remaining, view repair. Repair Replace the Crankshaft Position Sensor. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .

Scheme 112

1. ACTIVE DTC Turn the ignition on. With the scan tool, select View DTCs. Copy DTC and Freeze Frame information. Start the engine and allow it to reach operating temperature. 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. NOTE: Attempt to operate the vehicle under conditions similar to which the DTC was set. NOTE: It may be necessary to test drive the vehicle within the DTC monitoring conditions in order for this DTC to set. With a scan tool, select View DTCs. Is the DTC Active at this time? Yes Go To 2 . No Refer to the «INTERMITTENT CONDITION»(ref-306207-S19641665412008120900000) Diagnostic Procedure.
2. CHECKING CRANKSHAFT POSITION SENSOR SIGNAL WITH A LAB SCOPE Turn the ignition off. With a lab scope probe and the Miller special tool #6801, backprobe the (K24) CKP Signal circuit in the Sensor harness connector. 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. Ignition on, engine not running. Observe the lab scope screen. Start the engine. Observe the lab scope screen. Are there any irregular or missing signals? Yes Go To 3 . No Go To 8 .
3. WIRE HARNESS INSPECTION Turn the ignition off. Visually inspect the related wire harness including the ground circuit. Look for any chafed, pierced, pinched, or partially broken wires. Visually inspect the related wire harness connectors. Look for broken, bent, pushed out, or corroded terminals. Make sure the Crankshaft Position Sensor and the Camshaft Position Sensor are properly installed and the mounting bolt(s) are torqued to the proper specification. Refer to any TSBs that may apply. Were any of the above conditions present? Yes Repair as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 4 .
4. (K855) 5-VOLT SUPPLY CIRCUIT OPEN OR SHORTED TO GROUND Disconnect the CKP Sensor connector. Ignition on, engine not running. Measure the voltage on the (K855) 5-volt Supply circuit in the Sensor harness connector. Is the voltage between 4.5 and 5.2 volts? Yes Go To 5 . No Repair the open or short to ground in the (K855) 5-volt Supply circuit. Use Miller special tool #8815 when checking for an open circuit to prevent PCM harness connector terminal damage. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
5. TONE WHEEL/FLEX PLATE INSPECTION Turn the ignition off. Carefully disconnect the Negative Battery (Ground) cable. Remove the Crankshaft Position Sensor. Inspect the Tone Wheel/Flex Plate slots for damage, foreign material, or excessive movement. Were any problems found? Yes Repair or replace the Tone Wheel/Flex Plate as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 6 .
6. CHECKING CAMSHAFT POSITION SENSOR SIGNAL WITH A LAB SCOPE Install the CKP Sensor and connect the battery cable. NOTE: An intermittent condition in the Cam Position Sensor can cause the P0339 to set. With the a lab scope probe and the Miller special tool #6801, backprobe the (K44) CMP Signal circuit in the Sensor harness connector. 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. Ignition on, engine not running. Wiggle the related wire harness and lightly tap on the Cam Position Sensor. Observe the lab scope screen. Start the engine. Observe the lab scope screen. Are there any irregular or missing signals? Yes Verify that there is good pin to terminal contact in the CMP Sensor and the Powertrain Control Module connectors. If OK, replace the Cam Position Sensor. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 7 .
7. CRANKSHAFT POSITION SENSOR Verify that there is good pin to terminal contact in the CKP Sensor and the Powertrain Control Module connectors. If there are no possible causes remaining, view repair. Repair Replace the Crankshaft Position Sensor. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
8. (K24) CKP SIGNAL CIRCUIT SHORTED TO VOLTAGE Turn the ignition off. Disconnect the C2 PCM harness connector. Disconnect the CKP Sensor harness connector. Ignition on, engine not running. Measure the voltage on the (K24) CKP Signal circuit in the Sensor harness connector. Wiggle the related wire harness while taking this measurement. Is there any voltage present? Yes Repair the short to voltage in the (K24) CKP Signal circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 9 .
9. (K24) CKP SIGNAL CIRCUIT OPEN Turn the ignition off. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis. Measure the resistance in the (K24) CKP Signal circuit from the CKP harness connector to the appropriate terminal of special tool #8815. Wiggle the wire harness while taking this measurement. Is the resistance below 1.0 ohm? Yes Go To 10 . No Repair the excessive resistance in the (K24) CKP Signal circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
10. (K24) CKP SIGNAL CIRCUIT SHORTED TO GROUND Measure the resistance between ground and the (K24) CKP Signal circuit in the CKP Sensor harness connector. Wiggle the related wire harness while monitoring the resistance value. Does the resistance ever go below 100 ohms? Yes Repair the short to ground in the (K24) Signal circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 11 .
11. (K24) CKP SIGNAL CIRCUIT SHORTED TO THE (K855) 5-VOLT SUPPLY CIRCUIT Measure the resistance between the (K855) 5-volt Supply circuit and the (K24) CKP Signal circuit in the CKP harness connector. Wiggle the related wire harness while taking this measurement. Is the resistance below 5.0 ohms? Yes Repair the short between the (K855) 5-volt Supply circuit and the (K24) CKP Signal circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 12 .
12. POWERTRAIN CONTROL MODULE (PCM) Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the CKP 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. Verify that there is good pin to terminal contact in the CKP Sensor and the Powertrain Control Module connectors. Refer to any Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Replace and program the Powertrain Control Module per Service Information. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .

1. ACTIVE DTC Turn the ignition on. With the scan tool, select View DTCs. Copy DTC and Freeze Frame information. Start the engine and allow it to reach operating temperature. 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. NOTE: Attempt to operate the vehicle under conditions similar to which the DTC was set. NOTE: It may be necessary to test drive the vehicle within the DTC monitoring conditions in order for this DTC to set. With a scan tool, select View DTCs. Is the DTC Active at this time? Yes Go To 2 . No Refer to the «INTERMITTENT CONDITION»(ref-306207-S19641665412008120900000) Diagnostic Procedure.
2. CHECKING CAMSHAFT POSITION SENSOR SIGNAL WITH A LAB SCOPE Turn the ignition off. With a lab scope probe and the Miller special tool #6801, backprobe the (K44) CMP Signal circuit in the CMP harness connector. 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. Ignition on, engine not running. Observe the lab scope screen. Start the engine. Observe the lab scope screen. Are there any irregular or missing signals? Yes Go To 3 . No Go To 8 .
3. WIRE HARNESS INSPECTION Turn the ignition off. Visually inspect the related wire harness including the ground circuit. Look for any chafed, pierced, pinched, or partially broken wires. Verify that there is good pin to terminal contact in the Camshaft Position Sensor and the Powertrain Control Module connectors. Visually inspect the related wire harness connectors. Look for broken, bent, pushed out, or corroded terminals. Make sure the Crankshaft Position Sensor and the Camshaft Position Sensor are properly installed and the mounting bolt(s) are torqued to the proper specification. Refer to any TSBs that may apply. Were any of the above conditions present? Yes Repair as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 4 .
4. (K857) 5-VOLT SUPPLY CIRCUIT OPEN OR SHORTED TO GROUND Disconnect the CMP Sensor connector. Ignition on, engine not running. Measure the voltage on the (K857) 5-volt Supply circuit in the CMP harness connector. Is the voltage between 4.5 and 5.2 volts? Yes Go To 5 . No Repair the open or short to ground in the (K857) 5-volt Supply circuit. Use Miller special tool #8815 when checking for an open circuit to prevent PCM harness connector terminal damage. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
5. TONE WHEEL/PULSE RING INSPECTION Turn the ignition off. Carefully disconnect the Battery Ground cable. Remove the Camshaft Position Sensor. Inspect the Tone Wheel/Pulse Ring for damage, foreign material, or excessive movement. Were any problems found? Yes Repair or replace the Tone Wheel/Pulse Ring as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 6 .
6. CHECKING CRANKSHAFT POSITION SENSOR SIGNAL WITH A LAB SCOPE NOTE: An intermittent condition in the Crank Position Sensor can cause the P0344 to set. Install the CMP Sensor and connect the Battery cable. With a lab scope probe and the Miller special tool #6801, backprobe the (K24) CKP Signal circuit in the CKP harness connector. 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. Ignition on, engine not running. Wiggle the related wire harness and lightly tap on the Crank Position Sensor. Observe the lab scope screen. Start the engine. Observe the lab scope screen. Are there any irregular or missing signals? Yes Verify that there is good pin to terminal contact in the Crankshaft Position Sensor and the Powertrain Control Module connectors. If OK, replace the Crank Position Sensor. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 7 .
7. CAMSHAFT POSITION SENSOR If there are no possible causes remaining, view repair. Repair Verify that there is good pin to terminal contact in the Crankshaft Position Sensor and the Powertrain Control Module connectors. If OK, replace the Camshaft Position Sensor. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
8. (K44) CMP SIGNAL CIRCUIT SHORTED TO VOLTAGE Turn the ignition off. Disconnect the CMP Sensor connector. Disconnect the C1 and C2 PCM harness connectors. Ignition on, engine not running. Measure the voltage on the (K44) CMP Signal circuit. Wiggle the related wire harness while taking this measurement. Is there any voltage present? Yes Repair the short to voltage in the (K44) CMP Signal circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 9 .
9. (K44) CMP SIGNAL CIRCUIT OPEN Turn the ignition off. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis. Measure the resistance in the (K44) CMP Signal circuit from the CMP harness connector to the appropriate terminal of special tool #8815. Wiggle the related wire harness while taking this measurement. Is the resistance below 5.0 ohms? Yes Go To 10 . No Repair the excessive resistance in the (K44) CMP Signal circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
10. (K44) CMP SIGNAL CIRCUIT SHORTED TO GROUND Measure the resistance between ground and the (K44) CMP Signal circuit in the CMP Sensor harness connector. Wiggle the related wire harness while monitoring the resistance value. Does the resistance ever go below 100 ohms? Yes Repair the short to ground in the (K44) CMP Signal circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 11 .
11. (K44) CMP SIGNAL CIRCUIT SHORTED TO THE (K857) 5-VOLT SUPPLY CIRCUIT Measure the resistance between the (K857) 5-volt Supply circuit and the (K44) CMP Signal circuit in the CMP harness connector. Wiggle the related wire harness while taking this measurement. Is the resistance below 5.0 ohms? Yes Repair the short between the (K857) 5-volt Supply circuit and the (K44) CMP Signal circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 12 .
12. POWERTRAIN CONTROL MODULE (PCM) Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the CMP 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. Verify that there is good pin to terminal contact in the Camshaft Position Sensor and the Powertrain Control Module connectors. Refer to any Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Replace and program the Powertrain Control Module per Service Information. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .

Scheme 113