Ford training section3 symptom charts

SYSTEM/COMPONENT REFERENCE Section 5 Pinpoint Test unless noted Check the following DPFEGR PID value not within 0.15 volt of ignition ON, engine OFF value: parameter identifiers PIDs: Fo

Trang 1

Symptom Charts

Contents

QT: Powertrain Control Module (PCM) Quick Test 3-1

No Diagnostic Trouble Codes (DTCs) Present Symptom Chart Index 3-2

No Diagnostic Trouble Codes (DTCs) Present Symptom Charts 3-5

Trang 2

Test Step Results / Action to Take QT1 CARRY OUT THE PCM QUICK TEST

Note: For vehicles indicating not ready for inspection Yes

maintenance (I/M) testing, refer to the Owner Literature, GO to Section 4, Diagnostic

Readiness For Inspection/Maintenance (I/M) Testing to Trouble Code (DTC) Charts and complete the system readiness If an I/M testing system Descriptions for direction to repair readiness concern is still present, GO to Pinpoint Test QC DTCs after noting the following:

DIAGNOSE the DTCs in the

Note: If the vehicle was brought in with an emission

following order (begin diagnosis compliance concern, GO to Pinpoint Test EM.

with the first DTC output in that

Note: For applications that use a stand-alone transmission mode and diagnose any circuit

control module (TCM), the PCM does not output TCM related DTCs first) For multiple related diagnostic trouble codes (DTCs) Refer to the circuit DTCs that are set as a result Workshop Manual Section 307-01, Automatic of a concern with more than one Transaxle/Transmission, diagnostic strategy to continue component, REFER to the Wiring

Controls Cell and identify the

Note: If unable to access the PCM DTCs, or a scan tool

common cause such as SIGRTN, communication concern exists, GO to Pinpoint Test QA in

VREF, or VPWR CONTINUE DTC Section 5 For additional information on retrieving malfunction

diagnosis by referring to the indicator lamp (MIL) and non-MIL DTCs, refer to Section 2,

appropriately identified pinpoint Quick Test Description for the Continuous Memory Self-Test.

test.

• Complete the preliminary checks looking for obvious (1) Any KOEO self-test

concerns that may relate to the symptom Check for the DTCs

— electrical circuits and connectors (3) Any continuous memory

— vacuum lines (leaks, routing) self-test DTCs Retrieve

— air intake system (leaks, restrictions) any available freeze

— fuel quality (octane, contamination, winter/summer frame data and disregard

— cooling system (engine operating at correct continuous DTCs already

• Access any related On-line Automotive Service Information System (OASIS) or Technical Service Bulletin No

GO to No Diagnostic Trouble (TSB) information (if available) Codes (DTCs) Present Symptom

• Carry out the PCM self-test to access any DTCs Record Chart Index for direction to the

any key on engine off (KOEO), key on engine running correct symptom chart in No

(KOER) (if the engine runs) and continuous memory (MIL Diagnostic Trouble Codes (DTCs)

• Are any DTCs present?

If the symptom is not listed, REFER to the applicable Workshop Manual Section to continue

diagnosis.

Trang 3

Chart Index

Note: OASIS identifiers (the x means any number (1-9) can be used) xxx4xx equals during idle, xxx5xx

equals during acceleration, xxx6xx equals during cruise, xxx7xx equals during deceleration.

(Continued)

Trang 4

OASIS Chart Page

Additional Driveability Concerns

Temperature warning indicatorWarning Indicators

or gauge (for vehicles equipped 206000 Chart Number: 16

temperature (CHT) sensor only)

Chart Number:

Powertrain malfunction indicator 698298 Chart Number: 16

Boost gauge indicates higher 204000 Chart Number: 17

Chart Number:

Engine

Chart Number:

Oil System Concerns

Chart Number:

Electric cooling fan(s) does not Chart Number:

operate (low, high or variable 402000 16 18speed)

Cooling fan clutch does not Chart Number:

Electric cooling fan(s) always 402000 Chart Number: 18

(Continued)

Trang 5

Chart Index

Trang 6

— Unique Idle Concerns: Rolling Idle

Note: For some vehicle applications, the engine may stall if left running while refueling Advise

the customer to turn the engine off while refueling to avoid contamination or damage to the evaporative emission (EVAP) system.

SYSTEM/COMPONENT REFERENCE (Section 5 Pinpoint Test unless noted)

Check the following DPFEGR PID value not within 0.15 volt of ignition ON, engine OFF value:

parameter identifiers (PIDs): For vehicles equipped with an exhaust gas recirculation system module (ESM),

— DPFEGR (if equipped) GO to Pinpoint Test HH

(hot idle value within For all others, GO to Pinpoint Test HE

0.15 volt of the ignition LONGFT1/LONGFT2 value low (-):

ON, engine OFF value) Continue diagnosis Concentrate checks in areas that would cause the engine to run

— LONGFT1/LONGFT2 rich

(value between -20 and LONGFT1/LONGFT2 value high (+):

+20%) Continue diagnosis Concentrate checks in areas that would cause the engine to run

— VPWR (value between lean

10.5 and 17.0 volts, and VPWR not between 10.5 and 17.0 volts:

within 0.5 volt of battery REFER to the Workshop Manual Section 414-00, Charging System and carry out thevoltage) Inspection and Verification to continue diagnosis

VPWR between 10.5 and 17.0 volts, but not within 0.5 volt of battery voltage:

CHECK the B+ voltage to the powertrain control module (PCM) power relay CHECKthe VPWR circuit between the PCM and the PCM power relay CHECK the PWRGND circuits

For vehicles that run rough The INJx F PID(s) indicate a fault (an injector circuit concern is indicated) For Flex

at idle: GTDI 3.5L, MKS 3.5L, MKT 3.5L and Taurus GTDI 3.5L vehicles, GO to Pinpoint TestCheck the INJx F PIDs DI For all others, GO to Pinpoint Test KG

(the ‘‘x’’ indicates the

injector number) with the

ignition ON, engine running

There is 1 INJx F PID for

each engine cylinder All

INJx F PIDs must indicate

no fault (or NO)

(Continued)

Trang 7

Mass Air Flow (MAF) GO to Pinpoint Test DC

Sensor

Manifold Absolute Pressure GO to Pinpoint Test DN

(MAP) Sensor (Flex GTDI

3.5L, MKS 3.5L, MKT 3.5L

and Taurus GTDI 3.5L)

Secondary Ignition System For vehicles equipped with a coil pack ignition system, GO to Pinpoint Test JC

For all others, GO to Pinpoint Test JB

Fuel Delivery System GO to Pinpoint Test HC

Exhaust System GO to Pinpoint Test HF

Positive Crankcase GO to Pinpoint Test HG

Ventilation (PCV) System

EVAP System For Fiesta, GO to Pinpoint Test HZ For all others, GO to Pinpoint Test HX

Charging System Visual REFER to the Workshop Manual Section 414-00, Charging System and carry

out the Inspection and Verification to continue diagnosis

Universal Heated Oxygen GO to Pinpoint Test DZ

Sensor (HO2S) (Edge,

Escape, E-Series 4.6L,

E-Series 5.4L, Expedition,

Fusion 2.5L, Fusion 3.0L,

F-150, Flex, F-Series Super

Duty, Mariner, Milan, MKS,

MKT, MKX, Mustang,

Navigator, and Taurus)

Automatic Transmission REFER to the Workshop Manual Section 307-01, Automatic Transaxle/Transmission,

Diagnosis By Symptom to continue diagnosis

Base Engine REFER to the Workshop Manual Section 303-00, Engine System and carry out the

Inspection and Verification to continue diagnosis

Intake Air System GO to Pinpoint Test HU

Additional Testing GO to Pinpoint Test Z

(Continued)

Trang 8

Additional Checks: REFER to the applicable Workshop Manual section

— Some vehicles have a

TQ_CNTRL PID

available Check this PID

to determine if the PCM

is reducing torque, and if

so, why the torque is

being reduced As a PID

display example; 0

equals no torque

reduction requested, 1

equals torque truncation,

which cuts fuel to protect

when line pressure falls

to minimum limit and 2

equals traction control

event, which cuts

fuel/spark for traction

Only Memory (EEPROM)

to carry out the Making

Changes to the VID

Block procedure

— Be aware of engine

RPM/speed limiting

functions of the PCM

(look for incorrect high

vehicle speed signal

from ABS, VSS, or

OSS)

— Verify the fuel filler cap

is correctly tightened or

the capless fuel tank

filler pipe is correctly

sealed and not physically

— A/C system (for surge

with A/C on)

— Speed control system

(for surge with speed

control on)

Trang 9

Chart 2

— Starting Concerns: Hard Start/Long Crank/Erratic Start/Erratic Crank

Battery Condition and REFER to the Workshop Manual Section 414-00, Charging System and carry out theCurrent Draw Inspection and Verification to continue diagnosis

Secondary Ignition System For vehicles equipped with a coil pack ignition system, GO to Pinpoint Test JC

Positive Crankcase GO to Pinpoint Test HG

Ventilation (PCV) System

EVAP System For Fiesta, GO to Pinpoint Test HZ For all others, GO to Pinpoint Test HX

Starting System REFER to the Workshop Manual Section 303-06, Starting System and diagnose the

engine cranks slowly symptom

Sensor

Additional Checks: Visual

— For vehicles equipped

with two camshaft

position (CMP) sensors,

verify the CMP1 and

CMP2 circuits are not

shorted together

Chart 3

— Starting Concerns: No Start (Engine Cranks)

Note: An extended crank because of a no start may load the exhaust system with raw fuel,

damaging the catalytic converter after the engine starts.

Add-on Anti-Theft Devices Visual CHECK with the customer

Fuel/Ignition GO to Pinpoint Test A

(Continued)

Trang 10

Intake Air System (Ranger) GO to Pinpoint Test KE

If the engine will not start at

closed throttle, but will start

and run normally at part

throttle, check the IAC

valve

Exhaust System Restrictions GO to Pinpoint Test HF

Chart 4

— Unique Idle Concerns: Slow Return To Idle

Vacuum Leaks, Throttle Visual

Note: If the vehicle runs normally with the ignition in the OFF position, check for a damaged

ignition switch, an IGN START/RUN or ISP-R circuit short to voltage, or a VPWR circuit short to voltage.

Trang 11

Base Engine Visual REFER to the Workshop Manual Section 303-00, Engine System and carry

Check for air leaks, out the Inspection and Verification to continue diagnosis

including correct sealing of

intake manifold and

components/vacuum lines

attached to intake air (such

as the PCV, EGR or IAC

valve/vacuum lines)

Verify the engine operates Visual REFER to the Workshop Manual Section 303-03, Engine Cooling or No

at normal temperature Diagnostic Trouble Codes (DTCs) Present Symptom Chart Index, to diagnose any

cooling system concerns that are present

Fast idle concerns (Ranger) TP MODE PID is not C/T with the throttle closed:

With the ignition ON, engine At vehicle start, the TPREL begins at about 1.25 volts and counts down to the lowestOFF monitor the TP MODE TP voltage value seen since engine start If the TP voltage value goes below the

PID while wiggling the TP normal range, then increases again, TPREL sets to the lower voltage If the TP

sensor circuits The TP voltage is about 0.04 volt greater than the TPREL value at closed throttle, the PCM

MODE PID can also be goes into part throttle mode

monitored during vehicle MONITOR the TP voltage and TPREL PIDs for sudden changes while checking for

drive With the throttle intermittent TP circuit/connector concerns CHECK for loose or worn throttle plates Ifclosed, the TP MODE PID no concern is found, GO to Pinpoint Test Z

must be C/T (closed

throttle)

Intake Air System Leaks GO to Pinpoint Test HU

Chart 6

— Unique Idle Concerns: Low/Slow Idle

— Stalls/Quits: Deceleration

Verify the fuel filler cap is Visual

correctly tightened or the

capless fuel tank filler pipe

is correctly sealed

Automatic Transmission REFER to the Workshop Manual Section 307-01, Automatic Transaxle/Transmission(stalls/quits on deceleration) to diagnose the torque convertor operation concerns

Charging System REFER to the Workshop Manual Section 414-00, Charging System and carry out the

(Continued)

Trang 12

Universal Heated Oxygen GO to Pinpoint Test DZ

Sensor (HO2S) (Edge,

Escape, E-Series 4.6L,

E-Series 5.4L, Expedition,

Fusion 2.5L, Fusion 3.0L,

F-150, Flex, F-Series Super

Duty, Mariner, Milan, MKS,

MKT, MKX, Mustang,

Navigator, and Taurus)

Chart 7

— Backfires

Secondary Ignition For vehicles equipped with a coil pack ignition system, GO to Pinpoint Test JC

Chart 8

— Lack/Loss of Power

Note: Verify the symptom is reported under normal driving conditions without excessive engine or

vehicle load Also, be aware of the engine RPM/speed limiting functions of the PCM.

Note: For vehicles equipped with a knock sensor (KS), a lack of power may result when the

vehicle is operated with a breakout box installed at the PCM The KS circuits are not

shielded in a breakout box, and KS signal noise may be noticed by the PCM If this

happens, spark timing is retarded and a lack of power may result.

Trang 13

Note: For applications with a KS, a lack of power may result if the engine has developed an

abnormal noise The KS may interpret some abnormal noise as detonation and retard

spark timing.

Automatic Transmission Visual

Fluid

Throttle Linkage Visual

Air Cleaner Element Visual

Check the following PIDS: LONGFT1/LONGFT2 value low (-):

— LONGFT1/LONGFT2 Continue diagnosis Concentrate checks in areas that would cause the engine to run(value between -20 and rich

+20%) LONGFT1/LONGFT2 value high (+):

— IMTVF (if equipped): For Continue diagnosis Concentrate checks in areas that would cause the engine to runboth ignition ON, engine lean

OFF and ignition ON, IMTVF PID indicates a fault:

engine running with the GO to Pinpoint Test HU

transmission in

PARK/NEUTRAL and the

engine RPM greater than

3,000 RPM, the PID

should indicate no fault

(or NO) in both

situations

Secondary Ignition For vehicles equipped with a coil pack ignition system, GO to Pinpoint Test JC

Sensor

Variable Camshaft Timing GO to Pinpoint Test HK

(VCT) System

Accelerator Pedal Position GO to Pinpoint Test DK

(APP) Sensor

Automatic Transmission REFER to the Workshop Manual Section 307-01, Automatic Transaxle/Transmission,

Shift Point Road Test to continue diagnosis

Brake System Drag or REFER to the Workshop Manual Section 206-00, Brake System

Binding

Supercharger Bypass GO to Pinpoint Test KJ

System

Turbocharger System GO to Pinpoint Test HN

(Continued)

Định dạng
Số trang	22
Dung lượng	109,66 KB