Ford F150 Pickup. Instruction - part 1592

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

  

Start engine and allow to idle. Ensure engine is at normal operating temperature of at least 195°F (87°C). 
Continue to monitor same PIDs and circuits as in step 7) at HOT IDLE. If any PID values are out of 
range, go to step 11). If all PID values are within range, go to next step. 

9) Recreate Symptom Using 30 MPH Road Test Procedure 
 
Road test vehicle at 30 MPH and continue to monitor same PIDs and circuits as in step 7). If any PID 
values are out of range, go to step 11). If all PID values are within range, go to next step. 

10) Recreate Symptom Using 55 MPH Road Test Procedure 
 
Road test vehicle at 55 MPH and continue to monitor same PIDs and circuits as in step 7). If any PID 
values are out of range, go to next step. If all PID values are within range, it is now necessary to 
physically disturb selected vehicle circuits in an attempt to recreate intermittent concern. Go to next step. 

11) Select Circuits To Be Tested From Intermittent Test Table 
 
Remain in scan tool PID selection menu. If symptoms were verified while performing steps 7)-10) 
(intermittent road tests), select PIDs or circuits that values did not match PID values or circuit values in 
PIN VOLTAGE/PID VALUE CHARTS in appropriate PIN VOLTAGE/PID VALUE CHARTS article. 
If symptoms were not verified performing steps 7)-10), select PIDs noted in list made in step 3). Match 
selected PIDs from steps 7)-10) or from list made in step 3) to corresponding circuit in 
INTERMITTENT TEST table. It is possible to have more than one circuit to test. If a PID recording 
was made with scan tool in step 6), it may be helpful to replay recording at this time. Using 
INTERMITTENT TEST table, determine test to perform (input or output). To perform input test, go to 
next step. To perform output test, go to step 16). If PID or circuit is not listed in INTERMITTENT TEST 
table, go to SYMPTOMS in TROUBLE SHOOTING - NO CODES - CNG, FLEX-FUEL & 
GASOLINE article and diagnose driveability symptom. 

12) KOEO Input Test Procedure For PCM Sensors 
 
Using circuits selected from INTERMITTENT TEST table, select only recommended PIDs to monitor 
with scan tool. If a PID is not available for a circuit, use a DVOM to monitor circuit. Go to area of 
suspect wiring or component fault. Turn ignition switch to ON position. If input is a switch-type 
component, turn switch on instructionly. Observe PID or DVOM value while lightly tapping on component, 
and then wiggling sensor wiring harness from component to PCM. If a fault is indicated, PID value or 
DVOM reading will suddenly change. Compare to correct KOEO values listed in PIN VOLTAGE/PID 
VALUE CHARTS in appropriate PIN VOLTAGE/PID VALUE CHARTS article. If no fault is indicated, 
go to next step. If a fault is indicated, isolate fault and repair as necessary. If wiring harness and connector
(s) is okay, replace suspect component. 

13) KOER Input Test Procedure For PCM Sensors 
Start engine and allow to idle. Continue to monitor PIDs and/or circuits as in step 12). Go to area of 

CAUTION: Ensure hands, clothing or tools are clear of cooling fans, engine 

drive belts and/or hot surfaces while performing test steps with 
engine running.

 

2003 Ford Pickup F150 

2003 ENGINE PERFORMANCE Self-Diagnostics - CNG, Flex-Fuel & Gasoline

  

suspect wiring or component fault. If input is a switch-type component, turn switch on instructionly. Observe 
PID or DVOM value while lightly tapping on component, and then wiggling sensor wiring harness from 
component to PCM. If a fault is indicated, value will suddenly change. Compare to correct HOT IDLE 
values listed in appropriate PIN VOLTAGE/PID VALUE CHARTS article. If no fault is indicated, turn 
ignition switch to OFF position and go to next step. If a fault is indicated, isolate fault and repair as 
necessary. If wiring harness and connector(s) is okay, replace suspect component. 

14) KOEO Water Soak Test Procedure For PCM Sensors 
 
Turn ignition switch to ON position. Continue to monitor PIDs and/or circuits as in step 13). Go to area 
of suspect wiring or component fault. If input is a switch-type component, turn switch on instructionly. 
While observing PID or DVOM value, lightly spray water on suspect component, circuit or connectors 
from component to PCM. Include any relays or relay modules associated with fault. If a fault is indicated, 
value will suddenly change. Compare to correct KOEO values in appropriate PIN VOLTAGE/PID 
VALUE CHARTS article. If no fault is indicated, go to next step. If a fault is indicated, isolate fault and 
repair as necessary. If wiring harness and connector(s) is okay, replace suspect component. 

15) KOER Water Soak Test Procedure For PCM Sensor 
 
Start engine and allow to idle. Continue to monitor PIDs and/or circuits as in step 14). Go to area of 
suspect wiring or component fault. If input is a switch-type component, turn switch on instructionly. While 
observing PID value, lightly spray water on suspect component, circuit or connectors from component to 
PCM. Include any relays or relay modules associated with fault. If a fault is indicated value will suddenly 
change. Compare to correct HOT IDLE values in appropriate PIN VOLTAGE/PID VALUE CHARTS 
article. If no fault is indicated, go to next step. If a fault is indicated, isolate fault and repair as necessary. 
If wiring harness and connector(s) is okay, replace suspect component. 

16) KOEO Output Test Procedure For PCM Actuators 
Using circuits chosen from INTERMITTENT TEST table, select only recommended PIDs to monitor 
with scan tool. Also use a DVOM to compare circuit values with scan tool PID values. If a PID is not 
available for a circuit, use a DVOM to monitor circuit. Turn ignition switch to ON position. Using scan 
tool, access OUTPUT TEST MODE. See OUTPUT TEST MODE under ADDITIONAL SYSTEM 
FUNCTIONS. 

Using scan tool, turn ALL OUTPUTS ON. Go to area of suspect wiring or component fault. Observe PID 

NOTE:

PIDs selected from INTERMITTENT TEST table will display commanded 
values only. Circuit measurements made with DVOM will indicate actual 
values.

NOTE:

OUTPUT TEST MODE may not control some outputs, such as fuel injectors 
or ignition coils. To test outputs not controlled by OUTPUT TEST MODE, 
go to step 17). Ensure hands, clothing or tools are clear of cooling fans, as 
they may turn on when OUTPUTS are commanded ON.

NOTE:

OUTPUT TEST MODE defaults to its normal state after 10 minutes.

 

2003 Ford Pickup F150 

2003 ENGINE PERFORMANCE Self-Diagnostics - CNG, Flex-Fuel & Gasoline

  

value while lightly tapping on component, and then wiggling sensor wiring harness from component to 
PCM. If a fault is indicated, value will suddenly change. Also, compare actual values with KOEO values 
in appropriate PIN VOLTAGE/PID VALUE CHARTS article. If no fault is indicated, go to next step. If a 
fault is indicated, isolate fault and repair as necessary. If wiring harness and connector(s) is okay, replace 
suspect component. 

17) KOER Output Test Procedure For PCM Actuators 
 
Start engine and allow to idle. Continue to monitor PIDs and/or circuits as in step 

16)

. Go to area of 

suspect wiring or component fault. Compare DVOM measurement to PID values while lightly tapping on 
component. 

Observe PID value while wiggling actuator wiring harness from component to PCM. A fault is indicated 
by a change in idle, or a sudden change or mismatch in PID value. Also, compare actual values with HOT 
IDLE values in appropriate PIN VOLTAGE/PID VALUE CHARTS article. If no fault is indicated, go to 
next step. If a fault is indicated, isolate fault and repair as necessary. If wiring harness and connector(s) is 
okay, replace suspect component. 

18) KOEO Output Water Soak Test Procedure For PCM Actuators 
Turn ignition switch to ON position. Using scan tool, access OUTPUT TEST MODE. See 

OUTPUT 

TEST MODE

 under ADDITIONAL SYSTEM FUNCTIONS. Turn all outputs on. Continue to monitor 

PIDs and/or circuits as in step 17). Go to area of suspect wiring or component fault. While observing PID 
or DVOM value, lightly spray water on suspect component, circuit or connectors from component to 
PCM. Include any relays or relay modules associated with fault. A fault is indicated by a change, a 
sudden change or mismatch in PID value. Also, compare actual values with KOEO values in appropriate 
PIN VOLTAGE/PID VALUE CHARTS article. If no fault is indicated, go to next step. If a fault is 
indicated, isolate fault and repair as necessary. If wiring harness and connector(s) is okay, replace suspect 
component. 

NOTE:

If a coil for a coil on plug application has been tapped and is suspect, turn 
ignition switch to OFF position. Remove coil. Using DVOM, check 
continuity between spark plug terminal and signal terminal of coil. 
Observe DVOM while lightly tapping on coil. A large fluctuation in 
resistance indicates an intermittent open in coil. Replace coil as 
necessary. If coil is okay, check wiring harness.

WARNING:

Avoid contact with PCM, Generic Electronic Module (GEM) or other 
modules when performing water soak test on electrical components 
and/or harnesses.

NOTE:

OUTPUT TEST MODE may not control some outputs, such as fuel 
injectors. To test outputs not controlled by OUTPUT TEST MODE, go to 
step 19).

WARNING:

Avoid contact with PCM, Generic Electronic Module (GEM) or other 
modules when performing water soak test on electrical components 

 

2003 Ford Pickup F150 

2003 ENGINE PERFORMANCE Self-Diagnostics - CNG, Flex-Fuel & Gasoline