HD1 DTC P0301-P0310: CHECK FOR NO LOW FUEL
NOTE:
Running out of fuel can turn on the MIL and possibly store a Continuous Misfire DTC.
l Has the vehicle recently run out of fuel?
Yes
OBD II system OK. COMPLETE PCM Reset to clear DTCs.
No
GO to �«HD2�».
HD2HD2 CHECK DAMPER AND PULLEY ASSEMBLY
NOTE:
This Pinpoint Test Step is for engines that have damper-mounted pulse rings. Remove the front cover if necessary to observe the crank pulley.
l Observe the crank pulley for wobble.
l Examine the EI pulse ring fastened to the harmonic fastener.
l Does the crank pulley wobble or is the pulse ring loose or damaged?
Yes
DISCONNECT battery for 5 minutes to allow PCM to learn new data, due to the old pulse ring. REPLACE the pulley or damper assembly. COMPLETE Misfire Monitor Repair Verification Drive Cycle.
No
GO to �«HD3�».
HD3HD3 CHECK FOR ADAPTIVE FUEL MONITOR AND HO2S CONTINUOUS MEMORY DTCS
NOTE:
The following is a list of non-misfire DTCs to look for in the Continuous Memory.
P0136, P0156
P0171, P0172, P0175
P1130, P1150
l Are any of the DTCs listed above present?
Yes
GO to �«HD5�».
No
GO to �«HD4�».
HD4HD4 CHECK FOR OTHER NON-MISFIRE CONTINUOUS MEMORY DTCS
NOTE:
Check for other non-misfire Continuous Memory DTCs which could cause the misfire DTC.
l Are other non-misfire Continuous Memory DTCs present?
Yes
ADDRESS the next Continuous Memory DTC. DISREGARD Misfire DTC at this time. GO to �«Section 4�» for Powertrain DTC Charts.
No
GO to �«HD5�».
HD5HD5 CHECK FOR KEY ON ENGINE OFF (KOEO) DTCS
l Check for any key on, engine off DTCs which could cause the Misfire DTC.
l Are any key on, engine off DTCs displayed on the Scan Tool?
Yes
GO to Powertrain DTC Charts section, and PROCEED as required. (to that particular DTC code)
No
GO to �«JB1�» to evaluate spark plugs and secondary wires.(coil pack issues)
If plugs/wires/coilpack are OK, GO to �«HD6�»
HD6HD6 CHECK FOR OTHER KEY ON ENGINE RUNNING DTCS
NOTE:
Check for any other key on, engine running DTCs which can cause the Misfire DTC.
l Are any additional key on, engine running DTCs displayed on the Scan Tool?
Yes
If DTCs P1132, P1138, P1152, P1158, P1131, P1137, P1151 or P1157 are present, GO to �«HD8�».
All others: GO to �«Section 4�», Powertrain DTC Charts, and PROCEED as required.
No
Vehicles with D.P.F. EGR Systems: GO to �«HD7�».
All others: GO to �«HD8�».
HD7HD7 CHECK/COMPARE PID VALUES
l Start engine and warm to normal operating temperature.
l Access DPFEGR PID.
l Record DPFEGR PID value.
l Key off.
l Key on, engine off.
l Access DPFEGR.
l Compare key on, engine off and engine running PID values.
l Was engine running PID value within 0.15 volt of key on, engine off value?
Yes
KEY OFF. GO to �«HD8�».
No
KEY OFF. Go to Pinpoint Test Step �«HE100�».
That will get you pretty far, let me know if you still get that far and don't locate the problem.
Also, as for the injectors:
Measure resistance of fuel injector and harness circuit between the fuel injector and VPWR circuits at the fuel injector harness connector.
The correct pins would be located if you look at this picture.
Now, AT the harness would be derived from looking at the injector half.
Is the resistance between 11.0-18.0 ohms?
If so, replace the PCM, is not, then diagnosis of that particular injector is in need.
Let me know what I didn't cover, or what you need covered more..
Ray
