Engine Performance Diagnostic

Engine Performance Diagnostic
Paul Danner
Table of Contents
Universal Testing Methods
Switch Inputs
Transistor Drivers and Output Solenoids
Oxygen Sensor Introduction
Oxygen Sensor Testing
Thermistors
Potentiometers
Pressure Sensors
The 5 Volt Reference Circuit
Signal Circuit Integrity’ Testing
Substituted Values
Airflow Sensors
Types of Fuel In jection
Fuel Delivery Designs
Fuel Pump Electrical Circuits
Fuel Pressure Testing
Fuel Injector Driver Designs
Fuel Injector Testing
No Injector Pulse, No Start Problems
Idle Speed Controls
Ignition System Inputs
No Start, No Spark Problems
No Start, Good Spark and Injector Pulse Condition
EGU System Problems
Common Terms and Abbreviations
Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
Section 7
Section 8
Section 9
Section 10
Section 11
Section 12
Section 13
Section 14
Section 15
Section 16
Section 17
Section 18
Section 19
Section 20
Section 21
Section 22
Section 23
Section 24
Section 25
1- 2Section 25
Term and Abbreviations
ENGINE COMPUTER
11*5 throttle position censor
engine coo[nit temperature sensor
intake air temperature sensor
manilold air Den®erat*iTt sensor
inr charge [empemitirt sensor
heaved oxygen sensor
knock sensor
mass air flow sensor
manifold absolute pressure sensor
barometric pressure sensor
EG I* valve position sensor
pressure feedback tor Ejplt (Ford)
delta iressrjTBfeedback 1br EG It ( Ford)
vehic e speed sensor
idle air eonlrui
air bypass valve
amo shutdown relay (Chryiler)
electronic engine control system (version 4. Ford)
data link connector
powertrain control module
ignition control module
crankshaft position sensor
camshaft posiiiuu sensor
ECT
IAT
MAT
ACT
M02S
KS
MAf
MAP
BARO
EVP
PEE
DPFE
vss
I AC
ABV
AS13 relay
EFC IV
DU
KM
ICM
CKP
CMP
Ion board diatoiostics 2 f 19% and newer engine computer systemi)
hertz fu measurement dffrequency )
Idle Speed control
Exhaust temp,
Assembly line data link (same as l ?l
Body cotiirol module
Engine control module ( same as PC’Jyll
Transmission control module
P/N switch Park/Seutral switch
Pow:cr steering pressure switch
Manual Lever Position Sensor ( Ford , transmission gear position switch )
Hi agnostic Trouble Code
Di Liual Storage Osc 11lost ope
KGR Valve Regulator ( FOREX)
Normally Open
Normally Closed
Pnsiiive Crankcas e Venti lari on
Pulse Width Modubdcm
BOO switch BrakeOn/Off switch ( Fond )
TffjC solenoid Torque Convener C luLch solenoid
TFT sensor Transmission Fluid Temperature sensor
Para meter idennlieauon (scan data values )
GBD II
HZ
[SC
EOT
Aim
HC M
ECM
KM
P . S . Psi
MLPS
TJTC
DSO
HVR
\o
VC
IV V
PWM
PID
EMISSIONS
lie hydrocarbon
carbon monoxide
oxides of nitrogen
carbon dioxule
ox ygen
CO
MIX
C02
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