Mechanics

CHECK ENGINE

2003 Ford Escape

Engine Performance problem
2003 Ford Escape 6 cyl Four Wheel Drive Automatic

Hi I have 2003 ford escape recently I got codes p0141, p0161, and p0356 can any one please tell me what that means some people telling me its a computer I have read for code p0356 not to replace a coil it could be defective wire from computer. Please I need help any sugestions very appreciated thank you
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Matr0skin
January 20, 2010.



Testing 1) For KOER & Continuous Memory Only DTCs P0351-P0360: Determine Which Coil Is Not Firing DTCs P0351-P0360 indicate PCM did not receive a valid IDM pulse signal from ignition module (integrated in PCM). Possible causes are:  Open or short in ignition START/RUN circuit.  Open coil driver circuit in harness.  Coil driver circuit shorted to ground.  Damaged coil.  Damaged PCM.  Coil driver circuit shorted to PWR. Using information from TEST JB: SECONDARY IGNITION , or DTC and IGNITION COIL-TO-CYLINDER CORRELATION (COIL-ON-PLUG) table and illustrations, determine which coil is not firing properly. Record cylinder, coil and PCM harness connector terminal number and go to next step. 2) Check Functionality Of Suspect Coil Driver (CD) Circuit Disconnect suspect coil (determined from IGNITION COIL-TO-CYLINDER CORRELATION (COIL-ON-PLUG) table. Connect test light between IGN START/RUN circuit and suspect CD circuit at coil-on-plug connector. See Fig. 297 and Fig. 298 . Disable Inertia Fuel Shutoff (IFS) switch. Observe test light while cranking engine. If test light blinks consistently, go to next step. If test light does not blink consistently, turn ignition switch to OFF position and go to step 4). 3) Check Functionality Of Suspect Coil Turn ignition switch to OFF position. Remove suspect coil from spark plug. Install Air Gap Spark Tester (303-D037) to suspect coil. Reconnect coil harness connector. Observe spark tester while cranking engine. If Blue-White spark is not present, turn ignition switch to OFF position and replace coil. Inspect spark plug and replace as necessary. If Blue-White spark is present, check spark plug. Replace as necessary and retest. If spark plug is okay, no fault is present at this time. Go to TEST Z, step 1). 4) Check IGN START/RUN Voltage To Suspect Coil Turn ignition switch to ON position. Using a DVOM, measure voltage between chassis ground and IGN START/RUN circuit at suspect coil harness connector. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, go to TEST B, step 5) (LS and Thunderbird), or check condition of related fuse/fuse links (all others). If fuse/fuse links are blown, check for short to ground in IGN START/RUN circuit. Repair as necessary. If fuse/fuse links are okay, repair open in IGN START/RUN circuit. NOTE: For additional testing information, see DIAGNOSTIC AIDS. Page 1 of 2 1/20/2010 ...5) Check Suspect CD Circuit For Open In Harness Turn ignition switch to OFF position. Disconnect PCM connector(s). Inspect connector for loose, damaged or corroded terminals. Repair as necessary. Using a DVOM, measure resistance of suspect CD circuit between PCM harness connector and appropriate coil-on-plug harness connector. Refer to IGNITION COIL-TO-CYLINDER CORRELATION (COIL- ON-PLUG) table to determine PCM terminal number. See Fig. 297 or Fig. 298 . If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open in CD circuit. 6) Check Suspect CD Circuit For Short To VPWR In Harness Turn ignition switch to ON position. Using a DVOM, measure voltage between chassis ground and suspect CD circuit at PCM harness connector terminal. Refer to IGNITION COIL-TO- CYLINDER CORRELATION (COIL-ON-PLUG) table to determine PCM terminal number. If voltage is less than one volt, go to next step. If voltage is one volt or more, repair CD circuit for short to VPWR. 7) Check Suspect CD Circuit For Short To Ground In Harness Turn ignition switch to OFF position. Disconnect scan tool from DLC. Using a DVOM, measure resistance of suspect CD circuit between chassis ground and PCM harness connector. Refer to IGNITION COIL-TO-CYLINDER CORRELATION (COIL-ON-PLUG) table to determine PCM terminal number. If resistance is more than 10 k/ohms, replace PCM. If symptom or DTC still exists after replacing PCM, go to next step to check for damaged coil. If resistance is 10 k/ohms or less, repair short to ground in CD circuit. If symptom or DTC still exists after repair is complete, go to next step to check for damaged coil. 8) Check Suspect Coil For Damage Remove suspect coil from spark plug. Refer to IGNITION COIL-TO-CYLINDER CORRELATION (COIL-ON-PLUG) table to determine suspect coil. Install Air Gap Spark Tester (303-D037) to suspect coil. Reconnect coil harness connector. Observe spark tester while cranking engine. If spark is not present, replace coil. Inspect spark plug and replace as necessary. If spark is present, check spark plug. Replace as necessary and retest. If spark plug is okay, no fault is present at this time. Go to TEST Z, step 1). Page 2 of 2 1/20/2010 ...


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Merlin2021
Jan 20, 2010.