5) Collect All Available Freeze Frame Data To Aid In Symptom Verification
Collect as much freeze frame data as possible to aid in determining intermittent fault area. Note any
freeze frame data that was recorded in step 2) or during QUICK TEST. Note any Continuous Memory
DTCs that were present prior to performing PCM RESET in step 2). Obtain any information from
customer that would aid in determining fault area. Go to next step.
6) Attempt To Recreate Symptom
Using scan tool, access PIDs displayed in freeze frame data (if available) and PIDs on list which were
noted in step 3). Using freeze frame data recorded earlier, recreate conditions described by each freeze
frame PID. Pay particular attention to ECT, LOAD, RPM and VSS PIDs. Use any information available
from customer to aid in producing conditions for recreating symptom. When symptom occurs, press
trigger on scan tool to begin recording. Refer to scan tool manufacturer's instruction instruction for recorder
function operation. If symptom is reproduced, go to step 11). If symptom cannot be reproduced, go to
next step.
7) Recreate Symptom Using KOEO Intermittent Road Test Procedure
Intermittent road test procedure is the last attempt to locate area of concern before physically disturbing
vehicle circuits. Intermittent road test procedure requires monitoring PID values or making circuit
measurements with a DVOM under 4 conditions: Key On Engine Off (KOEO), HOT IDLE, and/or
vehicle road test at 30 MPH, and/or 55 MPH. During road test at 30 MPH and/or 55 MPH, a ride along
assistant is necessary. Use PID values and circuit values in PIN VOLTAGE/PID VALUE CHARTS in
appropriate PIN VOLTAGE/PID VALUE CHARTS article to compare with actual PID values and circuit
measurements made during road test. Perform KOEO condition listed in PIN VOLTAGE/PID VALUE
CHARTS in appropriate PIN VOLTAGE/PID VALUE CHARTS article. Turn ignition switch to ON
position. Using scan tool, access and monitor values. Using a DVOM, measure circuits at PCM terminal
identified in PIN VOLTAGE/PID VALUE CHARTS in appropriate PIN VOLTAGE/PID VALUE
CHARTS article. Compare scan tool PID values with circuit values made with DVOM. If any PID values
are out of range, go to step 11). If all PID values are within range, go to next step.
8) Recreate Symptom Using HOT IDLE Road Test Procedure
NOTE:
Only DTCs that illuminate Malfunction Indicator Light (MIL) will trigger
freeze frame data. Refer to scan tool manufacturer's instruction instruction for
retrieving freeze frame data.
NOTE:
A road test may be necessary to recreate conditions that originally caused
symptom, or set DTC.
NOTE:
PIDs for PCM outputs in PIN VOLTAGE/PID VALUE CHARTS in appropriate
PIN VOLTAGE/PID VALUE CHARTS article represent commanded values
only. Circuit measurements made with DVOM indicate actual output
status. If circuit measurement made with a DVOM differs from scan tool
output PID value, a circuit fault may be indicated. PCM input PIDs that
differ from circuit measurements made with a DVOM indicate a possible
PCM fault.
2003 Ford Pickup F150
2003 ENGINE PERFORMANCE Self-Diagnostics - CNG, Flex-Fuel & Gasoline