1990 VOLKSWAGEN CORRADO heating

* EXHAUST SYSTEM UNIFORM INSPECTION GUIDELINES *
Article Text (p. 2)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:33PM
The Motorist Assurance Program continues to work
cooperatively and proactively with government agencies and consumer
groups toward solutions that both benefit the customer and are
mutually acceptable to both regulators and industry. We maintain the
belief that industry must retain control over how we conduct our
business, and we must be viewed as part of the solution and not part
of the problem. Meetings with state and other government officials
concerned with auto repair and/or consumer protection are conducted.
Feedback from these representatives are brought back to members, and
the program adjusted as needed.
To assure auto repair customers recourse if they were not
satisfied with a repair transaction, the Motorist Assurance Program
offers arbitration through MAP/BBB-CARE in cooperation with the
Council of Better Business Bureaus and individual participating
Bureaus. MAP "piloted" in Indianapolis and Pittsburgh during spring,
1996 - and publicized "roll-outs" in New Jersey, Detroit (MI), Chicago
(IL) and Richmond (VA) were conducted. To put some "teeth" in the
program, and accreditation requirement for shops was initiated. The
requirements are stringent and a self-policing method has been
incorporated which includes the "mystery shopping" of outlets. In
addition, a committee of service providers had been working diligently
developing standards for newspaper, television and Internet
advertising.
We welcome you to join us as we continue our outreach ...
with your support, both the automotive repair industry and your
customers will reap the benefits. Please visit MAP at our Internet
site: www.hunter.com/map.htm or contact us at:
808 17th Street, NW Suite 200
Washington, D.C. 20006
Ph. (202) 466-7050 Fax (202) 223-9569
OVERVIEW OF SERVICE REQUIREMENTS & SUGGESTIONS
It is MAP policy that all exhaust, brake, ABS, steering and
suspension, wheel alignment, tires and wheels, driveline, engine
performance and maintenance and heating, ventilation and air
conditioning services be offered and performed under the guidelines
and procedures specified in these sections.
Before any service is performed on a vehicle, an inspection
of the appropriate system must be performed. The results of this
inspection must be explained to the customer and documented on an
inspection form. The condition of the vehicle and its components will
indicate what services/part replacements may be required or suggested.
In addition, suggestions may be made to satisfy the needs expressed by
the customer.
This section lists the various parts and conditions that
indicate required or suggested service or part replacement. Although
this list is extensive, it is not inclusive. In addition to this list,
a technician may make a suggestion. This suggestion must be based on
substantial and informed experience or the vehicle manufacturer's
recommended service interval.

* EXHAUST SYSTEM UNIFORM INSPECTION GUIDELINES *
Article Text (p. 6)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:33PM
part of converter broken ³ ³
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄObvious overheating
³ ³ Further inspection required.

³ ³ See note (2) below.
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄOutlet pipes cracked
³ B ³ Require repair or replacement.
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄPieces of catalyst material
³ A,1 ³ Suggest replacement.
found downstream
³ ³
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄPlugged
³ A ³ Require replacement. See note (3)
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄTesting has determined that
³ A ³ Require repair or replacement.
existing converter has been
³ ³ lead-poisoned, contaminated
³ ³ or failed testing
³ ³
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄNOTE: (1) If the converter is breaking up, suggest converter
replacement. If an object has fallen into the converter,
remove the object.
(2) Further diagnosis is required to determine the cause of
the overheating. Replacement of the converter may not be
necessary.
(3) Determine cause and correct to ensure that new converter
will not become plugged.
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ EXHAUST & TAIL PIPES
NOTE: For pipes with resonators, also refer to the section on
Mufflers and Resonators.
EXHAUST & TAIL PIPES
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÂÄÄÄÄÄÄÂÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄCondition
³ Code ³ Procedure
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄBracket broken
³ A ³
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄ´Pipe bent out of position
³ B ³
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄ´ Require repair or replacement.
Pipe broken
³ A ³
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄ´Pipe cracked
³ B ³
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄPipe leaking
³ A ³
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄ´Pipe missing
³ C ³ Require replacement.
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄ´Pipe plugged
³ A ³
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄPipe weak due to corrosion,
³ A,1 ³ Suggest replacement.
but no leaks present
³ ³

* STEERING UNIFORM INSPECTION GUIDELINES *
Article Text (p. 2)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:34PM
The Motorist Assurance Program continues to work
cooperatively and proactively with government agencies and consumer
groups toward solutions that both benefit the customer and are
mutually acceptable to both regulators and industry. We maintain the
belief that industry must retain control over how we conduct our
business, and we must be viewed as part of the solution and not part
of the problem. Meetings with state and other government officials
concerned with auto repair and/or consumer protection are conducted.
Feedback from these representatives are brought back to members, and
the program adjusted as needed.
To assure auto repair customers recourse if they were not
satisfied with a repair transaction, the Motorist Assurance Program
offers arbitration through MAP/BBB-CARE in cooperation with the
Council of Better Business Bureaus and individual participating
Bureaus. MAP "piloted" in Indianapolis and Pittsburgh during spring,
1996 - and publicized "roll-outs" in New Jersey, Detroit (MI), Chicago
(IL) and Richmond (VA) were conducted. To put some "teeth" in the
program, and accreditation requirement for shops was initiated. The
requirements are stringent and a self-policing method has been
incorporated which includes the "mystery shopping" of outlets. In
addition, a committee of service providers had been working diligently
developing standards for newspaper, television and Internet
advertising.
We welcome you to join us as we continue our outreach ...
with your support, both the automotive repair industry and your
customers will reap the benefits. Please visit MAP at our Internet
site: www.hunter.com/map.htm or contact us at:
808 17th Street, NW Suite 200
Washington, D.C. 20006
Ph. (202) 466-7050 Fax (202) 223-9569
OVERVIEW OF SERVICE REQUIREMENTS & SUGGESTIONS
It is MAP policy that all exhaust, brake, ABS, steering and
suspension, wheel alignment, tires and wheels, driveline, engine
performance and maintenance and heating, ventilation and air
conditioning services be offered and performed under the guidelines
and procedures specified in these sections.
Before any service is performed on a vehicle, an inspection
of the appropriate system must be performed. The results of this
inspection must be explained to the customer and documented on an
inspection form. The condition of the vehicle and its components will
indicate what services/part replacements may be required or suggested.
In addition, suggestions may be made to satisfy the needs expressed by
the customer.
This section lists the various parts and conditions that
indicate required or suggested service or part replacement. Although
this list is extensive, it is not inclusive. In addition to this list,
a technician may make a suggestion. This suggestion must be based on
substantial and informed experience or the vehicle manufacturer's
recommended service interval.

* SUSPENSION UNIFORM INSPECTION GUIDELINES *
Article Text (p. 2)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:38PM
The Motorist Assurance Program continues to work
cooperatively and proactively with government agencies and consumer
groups toward solutions that both benefit the customer and are
mutually acceptable to both regulators and industry. We maintain the
belief that industry must retain control over how we conduct our
business, and we must be viewed as part of the solution and not part
of the problem. Meetings with state and other government officials
concerned with auto repair and/or consumer protection are conducted.
Feedback from these representatives are brought back to members, and
the program adjusted as needed.
To assure auto repair customers recourse if they were not
satisfied with a repair transaction, the Motorist Assurance Program
offers arbitration through MAP/BBB-CARE in cooperation with the
Council of Better Business Bureaus and individual participating
Bureaus. MAP "piloted" in Indianapolis and Pittsburgh during spring,
1996 - and publicized "roll-outs" in New Jersey, Detroit (MI), Chicago
(IL) and Richmond (VA) were conducted. To put some "teeth" in the
program, and accreditation requirement for shops was initiated. The
requirements are stringent and a self-policing method has been
incorporated which includes the "mystery shopping" of outlets. In
addition, a committee of service providers had been working diligently
developing standards for newspaper, television and Internet
advertising.
We welcome you to join us as we continue our outreach ...
with your support, both the automotive repair industry and your
customers will reap the benefits. Please visit MAP at our Internet
site: www.hunter.com/map.htm or contact us at:
808 17th Street, NW Suite 200
Washington, D.C. 20006
Ph. (202) 466-7050 Fax (202) 223-9569
OVERVIEW OF SERVICE REQUIREMENTS & SUGGESTIONS
It is MAP policy that all exhaust, brake, ABS, steering and
suspension, wheel alignment, tires and wheels, driveline, engine
performance and maintenance and heating, ventilation and air
conditioning services be offered and performed under the guidelines
and procedures specified in these sections.
Before any service is performed on a vehicle, an inspection
of the appropriate system must be performed. The results of this
inspection must be explained to the customer and documented on an
inspection form. The condition of the vehicle and its components will
indicate what services/part replacements may be required or suggested.
In addition, suggestions may be made to satisfy the needs expressed by
the customer.
This section lists the various parts and conditions that
indicate required or suggested service or part replacement. Although
this list is extensive, it is not inclusive. In addition to this list,
a technician may make a suggestion. This suggestion must be based on
substantial and informed experience or the vehicle manufacturer's
recommended service interval.

A/C-HEATER SYSTEM - MANUAL
Article Text (p. 2)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:41PM
Temperature Control Lever
The temperature control lever controls heating and cooling.
When moved to the left, lever turns compressor on. When moved to the
right, a heater water valve is opened, supplying coolant to heater
core.
HIGH-PRESSURE SWITCH
High-pressure switch shuts compressor off if high pressure
reaches 210 psi (14.8 kg/cmý). High-pressure switch will reset when
pressure decreases to 174 psi (12.2 kg/cm
ý).
LOW-PRESSURE SWITCH
Low-pressure switch cuts off system operation when there is
abnormally low pressure in system. This protects the compressor when
there is not enough R-12 in system. Low-pressure switch shuts
compressor off at 26 psi (1.8 kg/cm
ý).
THERMOSWITCH
Thermoswitch shuts compressor off if coolant temperature
rises above 248
øF (120øC).Fig. 1: Locating A/C Components (Vanagon)
Courtesy of Volkswagen United States, Inc.

ABBREVIATIONS
Article Text (p. 6)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:42PMÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÂÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿
³ABBREVIATION
³DEFINITION ³
ÃÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´
³H/D
³Heavy Duty ³
³HAC
³High Altitude Compensation ³
³HC
³Hydrocarbons ³
³HEDF
³High Speed Electro Drive Fan relay or circuit ³
³HEGO
³Heated Exhaust Gas Oxygen Sensor ³
³HEGOG
³HEGO Ground circuit ³
³HEI
³High Energy Ignition ³
³HLDT
³Headlight ³
³HO
³High Output ³
³HP
³High Performance ³
³HSC
³High Swirl Combustion ³
³HSO
³High Specific Output ³
³HTR
³Heater ³
³HVAC
³Heating ³
³Headlt.
³Headlight ³
³Hg
³Mercury ³
³Hgt.
³Height ³
³Htr.
³Heater ³
³Hz
³Hertz (Cycles Per Second) ³
ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ "I" ABBREVIATION TABLE
"I" ABBREVIATION TABLE
ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÂÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿
³ABBREVIATION
³DEFINITION ³
ÃÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´
³I.D.
³Inside Diameter ³
³IAC
³Idle Air Control ³
³IACV
³Idle Air Control Valve ³
³IC
³Integrated Circuit ³
³ID
³Identification ³
³IDM
³Ignition Diagnostic Module ³
³IGN
³Ignition system or circuit ³
³ILC
³Idle Load Compensator ³
³In. Hg
³Inches of Mercury ³
³INCH Lbs.
³Inch Pounds ³
³INFL REST
³Inflatable Restraint ³
³INJ
³Injector or Injection ³
³IP
³Instrument Panel ³
³IPC
³Instrument Panel Cluster ³
³ISA
³Idle Speed Actuator ³
³ISC
³Idle Speed Control ³
³ISS
³Idle Stop Solenoid ³
³ITS
³Idle Tracking Switch ³
³IVSV
³Idle Vacuum Switching Valve ³
³Ign.
³Ignition ³
³In.
³Inches ³
³Inj.
³Injector ³

ABBREVIATIONS
Article Text (p. 6)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:42PM
"H" ABBREVIATION TABLEÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÂÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿
³ABBREVIATION
³DEFINITION ³
ÃÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´
³H/D
³Heavy Duty ³
³HAC
³High Altitude Compensation ³
³HC
³Hydrocarbons ³
³HEDF
³High Speed Electro Drive Fan relay or circuit ³
³HEGO
³Heated Exhaust Gas Oxygen Sensor ³
³HEGOG
³HEGO Ground circuit ³
³HEI
³High Energy Ignition ³
³HLDT
³Headlight ³
³HO
³High Output ³
³HP
³High Performance ³
³HSC
³High Swirl Combustion ³
³HSO
³High Specific Output ³
³HTR
³Heater ³
³HVAC
³Heating ³
³Headlt.
³Headlight ³
³Hg
³Mercury ³
³Hgt.
³Height ³
³Htr.
³Heater ³
³Hz
³Hertz (Cycles Per Second) ³
ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ "I" ABBREVIATION TABLE
"I" ABBREVIATION TABLE
ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÂÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿
³ABBREVIATION
³DEFINITION ³
ÃÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´
³I.D.
³Inside Diameter ³
³IAC
³Idle Air Control ³
³IACV
³Idle Air Control Valve ³
³IC
³Integrated Circuit ³
³ID
³Identification ³
³IDM
³Ignition Diagnostic Monitor ³
³IGN
³Ignition system or circuit ³
³ILC
³Idle Load Compensator ³
³In. Hg
³Inches of Mercury ³
³INCH Lbs.
³Inch Pounds ³
³INFL REST
³Inflatable Restraint ³
³INJ
³Injector or Injection ³
³IP
³Instrument Panel ³
³IPC
³Instrument Panel Cluster ³
³ISA
³Idle Speed Actuator ³
³ISC
³Idle Speed Control ³
³ISS
³Idle Stop Solenoid ³
³ITS
³Idle Tracking Switch ³
³IVSV
³Idle Vacuum Switching Valve ³
³Ign.
³Ignition ³
³In.
³Inches ³

E - THEORY/OPERATION - DIGIFANT
Article Text (p. 5)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:43PM
OXYGEN (O2) SENSOR
The O2 sensor detects oxygen content in the exhaust gas and
sends this information to the ECU. In operation, the ECU receives
signals from the O2 sensor and varies the duration during which fuel
is injected. A high voltage signal indicates a rich mixture. A low
voltage signal indicates a lean mixture.
The O2 sensor is heated electrically for rapid warm-up and
constant operating temperature. Power to the heating element is
supplied whenever ignition switch is turned to ON position.
POWER STEERING (P/S) OIL PRESSURE SWITCH
The P/S oil pressure switch signals the ECU when the power
steering load is high. The ECU then sends a voltage signal to the idle
stabilization valve to increase idle speed with power steering load.
THROTTLE VALVE SWITCH (VANAGON ONLY)
Throttle valve switch supplies ECU with information that
throttle valve is closed. If engine is above 1500 RPM with throttle
closed, fuel will be shut off to the injectors. At idle speed, this
switch signals control unit to regulate amount of fuel injected.
OUTPUT SIGNALS
NOTE: Each vehicle may be equipped with different combinations of
computer controlled components. The following listed
components may NOT be used on all models. For theory and
operation on each output component, refer to the system
indicated in brackets, to the right of each component.
* Fuel Injectors (Fuel Control)
* Idle Air Stabilizer Valve (Idle Speed)
* Ignition Coil Control (Ignition System)
FUEL DELIVERY
ELECTRIC FUEL PUMP
The fuel pump provides fuel under pressure to the fuel
pressure regulator. Power for operation during cranking mode is
provided from starter relay via the fuel pump relay. After the engine
has started, control of the fuel pump is through the ignition signal.
The fuel pump is sealed unit.
FUEL PUMP RELAY
When energized by the ignition switch and grounded by the
ECU. The fuel pump relay provides battery voltage to the fuel pumps,
injectors, idle stabilization control unit, oxygen sensor heating