1991 FORD FESTIVA Service Manual

Oxides of Nitrogen
"O"
O2
Oxygen
OBD
On-Board Diagnostics
OC
Oxidation Catalyst
OD
Overdrive
O.D.
Outside Diameter
OHC
Overhead Camshaft
O/S
Oversize
oz.
Ounce
ozs.
Ounces
"P"
"P"
Park
P/C
Printed Circuit
PCM
Powertrain Control Module
PCS
Purge Control Solenoid
PC-SOL
Purge Control Solenoid
PCV
Positive Crankcase Ventilation
PFI
Port Fuel Injection
PGM-FI
Programmed Fuel Injection
PID
Parameter Identification
PIP
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Profile Ignition Pick-up
PNP
Park Neutral Position Switch
P/N
Park/Neutral
PRNDL
Park Reverse Neutral Drive Low
PROM
Programmable Read-Only Memory
psi
Pounds Per Square Inch
P/S
Power Steering
PSPS
Power Steering Pressure Switch
PTC
Positive Temperature Coefficient
PTO
Power Take-Off
Pts.
Pints
Pwr.
Power
"Q"
Qts.
Quarts
"R"
RABS
Rear Anti-Lock Brake System
RECIRC
Recirculation
RH
Right Hand
RPM
Revolutions Per Minute
RWAL
Rear Wheel Anti-Lock Brake
RWD
Rear Wheel Drive
"S"
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SBC
Single Bed Converter
SBEC
Single Board Engine Controller
SES
Service Engine Soon
SFI
Sequential (Port) Fuel Injection
SIL
Shift Indicator Light
SIR
Supplemental Inflatable Restraint
SOHC
Single Overhead Cam
SOL or Sol.
Solenoid
SPFI
Sequential Port Fuel Injection
SPK
Spark Control
SPOUT
Spark Output
SRI
Service Reminder Indicator
SRS
Supplemental Restraint System (Air Bag)
STAR
Self-Test Automatic Readout
STO
Self-Test Output
SUB-O
2
Sub Oxygen Sensor
Sw.
Switch
Sys.
System
"T"
TAB
Thermactor Air By-Pass
TAC
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Throttle Actuator Module
TAD
Thermactor Air Diverter
TBC
Body Control Module
TBI
Throttle Body Injection
TCC
Torque Converter Clutch
TDC
Top Dead Center
Temp.
Temperature
TFI
Thick Film Ignition
THERMAC
Thermostatic Air Cleaner
TPM
Tire Pressure Monitor
TPMS
Tire Pressure Monitor System
TPS
Throttle Position Sensor/Switch
TS
Temperature Sensor
TV
Thermovalve
TWC
Three-Way Catalyst
"V"
V
Valve
Vac.
Vacuum
VAF
Vane Airflow
VAPS
Variable Assist Power Steering
VCC
Viscous Converter Clutch
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VCRM
Variable Control Relay Module
VIN
Vehicle Identification Number
VM
Vacuum Modulator
Volt.
Voltage
VOM
Volt-Ohmmeter (Analog)
VRV
Vacuum Regulator Valve
VSS
Vehicle Speed Sensor
VSV
Vacuum Switching Valve
"W"
W/
With
W/O
Without
WAC
Wide Open Throttle A/C Switch
WOT
Wide Open Throttle
Copyr ight 2009 Mitchell Repair Information Company, LLC. All Rights Reserved.
Article GUID: A00002370
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Back To Article
GENERAL INFORMATION
T rouble Shooting - Basic Procedures
* PLEASE READ THIS FIRST *
ACCESSORIES & ELECTRICAL
CHARGING SYSTEM TROUBLE SHOOTING
BASIC CHARGING SYSTEM TROUBLE SHOOTING CHART NOTE:This is GENERAL inform ation. This article is not intended to be specific to any unique situation or
individual vehicle configuration. T he purpose of this T rouble Shooting inform ation is to provide a list
of com m on causes to problem sym ptom s. For m odel-specific T rouble Shooting, refer to SUBJECT ,
DIAGNOST IC, or T EST ING articles available in the section(s) you are accessing.
NOTE:This is GENERAL inform ation. This article is not intended to be specific to any unique situation or
individual vehicle configuration. T he purpose of this T rouble Shooting inform ation is to provide a list
of com m on causes to problem sym ptom s. For m odel-specific T rouble Shooting, refer to SUBJECT ,
DIAGNOST IC, or T EST ING articles available in the section(s) you are accessing.
NOTE:This is GENERAL inform ation. This article is not intended to be specific to any unique situation or
individual vehicle configuration. T he purpose of this T rouble Shooting inform ation is to provide a list
of com m on causes to problem sym ptom s. For m odel-specific T rouble Shooting, refer to SUBJECT ,
DIAGNOST IC, or T EST ING articles available in the section(s) you are accessing.
CONDITION & POSSIBLE CAUSECORRECTION
Vehicle Will Not Start
Dead batteryCheck battery cells, alternator
belt tension and alternator
output
Loose or corroded battery connectionsCheck all charging system
connections
Ignition circuit or switch malfunctionCheck and replace as necessary
Alternator Light Stays On With Engine Running
Loose or worn alternator drive beltCheck alternator drive tension
and condition, See Belt
Adjustment in TUNE-UP article
in the TUNE-UP section
Loose alternator wiring connectionsCheck all charging system
connections
Short in alternator light wiringSee Indicator Warning Lights in
STANDARD INSTRUMENTS
in the ACCESSORIES &
EQUIPMENT section
Defective alternator stator or diodesSee Bench Tests in
ALTERNATOR article
Defective regulatorSee Regulator Check in
ALTERNATOR article
Alternator Light Stays Off With Ignition Switch ON
Blown fuseSee WIRING DIAGRAMS
Defective alternatorSee Testing in ALTERNATOR
article
Defective indicator light bulb or socketSee Indicator Warning Lights in
STANDARD INSTRUMENTS
in the ACCESSORIES &
EQUIPMENT section
Alternator Light Stays OFF With Ignition Switch ON
Short in alternator wiringSee On-Vehicle Tests in
ALTERNATOR article
Defective rectifier bridgeSee Bench Tests in
ALTERNATOR article
Lights or Fuses Burn Out Frequently
Defective alternator wiringSee On-Vehicle Tests in
ALTERNATOR article
Defective regulatorSee Regulator Check in
ALTERNATOR article
Defective batteryCheck and replace as necessary
Ammeter Gauge Shows Discharge
Loose or worn drive beltCheck alternator drive belt
tension and condition. See Belt
Adjustment in TUNE-UP article
in the TUNE-UP section
Defective wiringCheck all wires and wire
Page 1 of 36 MITCHELL 1 ARTICLE - GENERAL INFORMATION Trouble Shooting - Basic Procedures
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IGNITION SYSTEM TROUBLE SHOOTING
connections
Defective alternator or regulatorSee Bench Tests and On-
Vehicle Tests in
ALTERNATOR article
Defective ammeter, or improper ammeter wiring connectionSee Testing in STANDARD
INSTRUMENTS in the
ACCESSORIES &
EQUIPMENT section
Noisy Alternator
Loose drive pulleyTighten drive pulley attaching
nut
Loose mounting boltsTighten all alternator mounting
bolts
Worn or dirty bearingsSee Bearing Replacement
ALTERNATOR article
Defective diodes or statorSee Bench Test in
ALTERNATOR article
Battery Does Stay Charged
Loose or worn drive beltCheck alternator drive belt
tension and condition. See Belt
Adjustment in appropriate
TUNE-UP article in the TUNE-
UP section
Loose or corroded battery connectionsCheck all charging system
connections
Loose alternator connectionsCheck all charging system
connections
Defective alternator or batterySee On-Vehicle Tests and
Bench Tests in ALTERNATOR
article
Add-on electrical accessories exceeding alternator capacityInstall larger alternator
Battery Overcharged-Uses Too Much Water
Defective batteryCheck alternator output and
repair as necessary
Defective alternatorSee On-Vehicle Test and Bench
Tests in ALTERNATOR article
Excessive alternator voltageCheck alternator output and
repair as necessary
NOTE:This is GENERAL inform ation. This article is not intended to be specific to any unique situation or
individual vehicle configuration. T he purpose of this T rouble Shooting inform ation is to provide a list
of com m on causes to problem sym ptom s. For m odel-specific T rouble Shooting, refer to SUBJECT ,
DIAGNOST IC, or T EST ING articles available in the section(s) you are accessing.
Page 2 of 36 MITCHELL 1 ARTICLE - GENERAL INFORMATION Trouble Shooting - Basic Procedures
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Fig. 1: Ignition Secondary Trouble Shooting Chart

Page 3 of 36 MITCHELL 1 ARTICLE - GENERAL INFORMATION Trouble Shooting - Basic Procedures
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