Ford Escort 1999 2.0L SOHC VIN P Workshop Manual

ford :: Ford Escort L4-122 2.0L SOHC VIN P SFI (

1999)

> A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > P0700-P07ZZ > P0720 - P0724, ( P0721 P0722 P0723 0720 0721 0722 0723 0724 ) > System Information > System Diagnosis > P0721 ( P 0721 )

P0720 - P0724: Testing and InspectionP0721 ( P 0721 )

Manual Transmission (M.T.)

For diagnosis of P0721 refer to chart

> A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > P0700-P07ZZ > P0720 - P0724, ( P0721 P0722 P0723 0720 0721 0722 0723 0724 ) > System Information

> System Diagnosis > P0721 ( P 0721 ) > Page 9

Escort L4-122 2.0L SOHC VIN P SFI (1999)

> A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > P0700-P07ZZ > P0720 - P0724, ( P0721 P0722 P0723 0720 0721 0722 0723 0724 ) > System Information

> System Diagnosis > P0721 ( P 0721 ) > Page 10

Escort L4-122 2.0L SOHC VIN P SFI (1999)

For complete Engine Control diagnostic information, See: Powertrain Management/Computers and Control Systems/Testing and Inspection

Automatic Transmission (A.T.)

For diagnosis of P0721 refer to chart

For complete Transmission Control diagnostic information, See: Powertrain Management/Transmission Control Systems/Testing and Inspection
For complete Engine Control diagnostic information, See: Powertrain Management/Computers and Control Systems/Testing and Inspection

> A L L Diagnostic Trouble Codes ( DTC ) > Codes by Number > P1400-P14ZZ > P1460 - P1464, ( P1461 P1462 P1463 1460 1461 1462 1463 1464 ) > System Information > System Diagnosis > P1464

P1460 - P1464: Testing and InspectionP1464

For diagnosis of refer to the system experiencing the problem.P1464

Computers and Control Systems or Transmission Control System

Refer to pinpoint test X124. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Pinpoint Tests/X - ConstantControl Relay Module (CCRM)/X120 - X124
For complete Engine Control diagnostic information, See: Powertrain Management/Computers and Control Systems/Testing and Inspection

Heating and Air Conditioning

For complete Heating and Air Conditioning diagnostic information, See: Heating and Air Conditioning/Testing and Inspection

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Specifications

Alarm Module: Specifications

RAP Module Nuts 9-11.5 Nm

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Specifications > Page 21

RAP Module Components

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Specifications > Page 22

Alarm Module: Diagrams

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Specifications > Page 23

Alarm Module: Description and Operation

RAP Module Components

(RAP)

The remote Anti-theft Personality module uses a keyless remote entry transmitter to lock/unlock the door(s) and arm/disarm anti-theft (ifequipped). Three levels of the RAP module are available:

^ Driver door remote system with anti-theft.
^ Two-door remote entry with anti-theft.
^ Anti-theft only (available only in Mexico).

(TIC)

All levels of the RAP module use a keyless remote entry transmitter that emits a radio frequency called a Transmitter Identification Code . TICscan be retrieved using New Generation STAR (NGS) Tester.

Driver Door Remote

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Specifications > Page

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Escort L4-122 2.0L SOHC VIN P SFI (1999)

The driver door remote level RAP module uses the keyless remote entry transmitter to:^Lock/unlock the driver door.

^ Release the deck lid.
^ Activate/deactivate the panic alarm.
^ Activate/deactivate the dome courtesy lamp.

^Anti-Theft Only (Available only in Mexico)

Activate panic alarm.

^ Arm/disarm anti-theft.

Two-Door Remote Entry With Anti-Theft

The two-door remote entry level RAP module uses the keyless remote entry transmitter to:^

Lock/unlock the driver door or passenger door.

^ Release the deck lid.

^ Activate/deactivate the dome courtesy lamp.
^ Arm/disarm anti-theft.
^ Activate/deactivate the panic alarm.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Service and Repair > Sedan

Alarm Module: Service and RepairSedan
REMOVAL

1. Disconnect the battery ground cable.2. Remove the quarter trim pane.
^ Remove the RH trim panel.

3. Disconnect the two electrical connectors, the ground strap from the sheet metal and the remote Anti-theft Personality module antenna.(RAP)

4. Remove the nuts and the RAP module.

Electronic modules are sensitive to static electrical charges. If exposed to these charges, damage may result.CAUTION:

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Service and Repair >

Sedan > Page 27

Escort L4-122 2.0L SOHC VIN P SFI (1999)

5. Lift the two tabs and remove the RAP module from the bracket.

INSTALLATION

1. To install, reverse the removal procedure.

NOTE:

When the battery is disconnected and reconnected, some abnormal drive symptoms may occur while the vehicle relearns its adaptivestrategy. The vehicle may need to be driven or more to relearn the strategy.16 km (10 mi)

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Service and Repair > Sedan > Page 28

Alarm Module: Service and RepairWagon
REMOVAL

1. Disconnect the battery ground cable.2. Remove the quarter trim pane.
^ Remove the LH trim panel.

3. Disconnect the two electrical connectors, the ground strap from the sheet metal and the remote Anti-theft Personality module antenna.(RAP)

4. Remove the nuts and the RAP module.

Electronic modules are sensitive to static electrical charges. If exposed to these charges, damage may result.CAUTION:

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Service and Repair >

Sedan > Page 29

Escort L4-122 2.0L SOHC VIN P SFI (1999)

5. Lift the two tabs and remove the RAP module from the bracket.

INSTALLATION

1. To install, reverse the removal procedure.

NOTE:

When the battery is disconnected and reconnected, some abnormal drive symptoms may occur while the vehicle relearns its adaptivestrategy. The vehicle may need to be driven or more to relearn the strategy.16 km (10 mi)

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Keyless Entry Module > Component Information > Diagrams

Keyless Entry Module: Diagrams

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Keyless Entry Module > Component Information > Diagrams > Page 33

Keyless Entry Module: Service and Repair

NOTE: (RAP)

After replacing the Remote Anti-theft Personality module it is necessary to reconfigure the module using the New Generation STAR Tester.(NGS)

> Relays and Modules > Relays and Modules - Body and Frame > Keyless Entry Module > Component Information > Diagrams

Keyless Entry Module: Diagrams

> Relays and Modules > Relays and Modules - Body and Frame > Keyless Entry Module > Component Information > Diagrams > Page 38

Keyless Entry Module: Service and Repair

NOTE: (RAP)

After replacing the Remote Anti-theft Personality module it is necessary to reconfigure the module using the New Generation STAR Tester.(NGS)

> Relays and Modules > Relays and Modules - Body and Frame > Power Door Lock Relay > Component Information > Diagrams

> Relays and Modules > Relays and Modules - Body and Frame > Power Door Lock Relay > Component Information > Diagrams > Page 42

Power Door Lock Relay: Testing and Inspection

1. Remove and disconnect the power door lock relay.

2. Measure resistance between the power door lock relay, terminal 5, and the power door lock relay terminals.

Terminal Resistance

2, 4, 7, 9

Between 150-185 Ohms

3. Measure resistance between the power door lock relay, terminal 6, and the power door lock relay terminals.

Terminal Resistance

3, 8, 12

Less than 5 Ohms

4. If the power door lock switch fails any of the above tests, install a new one. Otherwise, proceed to the next step.

> Relays and Modules > Relays and Modules - Body and Frame > Power Door Lock Relay > Component Information > Diagrams > Page 43

Escort L4-122 2.0L SOHC VIN P SFI (1999)

5. Apply to the power door lock relay terminal 5.12 volts

Measure the voltage between the power door lock relay terminals, and ground, while grounding the terminals as indicated in the illustration.

6. If the power door lock switch fails any of the above tests, install a new one.

> Relays and Modules > Relays and Modules - Brakes and Traction Control > ABS Main Relay > Component Information > Diagrams

> Relays and Modules > Relays and Modules - Brakes and Traction Control > ABS Main Relay > Component Information > Diagrams > Page 48

ABS Main Relay: Testing and Inspection

Component Testing Procedure

Terminals

> Relays and Modules > Relays and Modules - Brakes and Traction Control > ABS Main Relay > Component Information > Diagrams > Page 49

Escort L4-122 2.0L SOHC VIN P SFI (1999)

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Electronic Brake Control Module > Component Information > Specifications

Electronic Brake Control Module: Specifications

Retaining Screws .......................................................................................................................................................................... 7-10 Nm (61-86 inch lbs.)Electrical Connector ....................................................................................................................................................................... 6-7 Nm (53-62 inch lbs.)

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Electronic Brake Control Module > Component Information > Specifications > Page 53

Diagram 42-4

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Electronic Brake Control Module > Component Information > Specifications > Page 54

Electronic Brake Control Module: Description and Operation

The anti-lock brake control module is a non-repairable, on-board diagnostic unit consisting of one microprocessor and the necessary circuitry for itsoperation. The two primary functions of the anti-lock brake control module are to control the HCU during ABS operation and to monitor the systemduring normal driving, as well as during anti-lock braking.

Under normal braking conditions, the microprocessor produces short test pulses to check the electrical system without any mechanical reaction. Theanti-lock brake control module continuously monitors the speed of each wheel to determine if any wheel is beginning to lock. When a wheel lockingtendency is detected, the anti-lock brake control module signals the appropriate isolation valve and/or dump valve in the HCU to open or close as wellas the pump motor to turn on and return brake fluid back to the foundation braking system.

(DTC)

Most faults that occur in the ABS will be stored as a Diagnostic Trouble Code in the anti-lock brake control module. Once a DTC is stored, itwill be retained by the anti-lock brake control module even with the key in the OFF position. DTCs can be retrieved by following the on-boarddiagnostics procedures.

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Electronic Brake Control Module > Component Information > Specifications > Page 55

Electronic Brake Control Module: Service and Repair

Removal

1. Disconnect the battery ground cable.

your body when handling electronic components.

The anti-lock brake control module is located under the passenger seat.NOTE:

Disconnect the anti-lock brake control module electrical connector.1

Loosen the bolt.

2 Remove the electrical connector.

3. Remove the anti-lock brake control module.

> Relays and Modules > Relays and Modules - Brakes and Traction Control > Electronic Brake Control Module > Component Information > Specifications > Page 56

Escort L4-122 2.0L SOHC VIN P SFI (1999)

1 Remove the bolts.
2 Remove the anti-lock brake control module.

Installation

NOTE:

When the battery is disconnected and reconnected, some abnormal drive symptoms may occur while the vehicle relearns its adaptive strategy.The vehicle may need to be drive or more to relearn its strategy.16 km (10 mi)

1. To install, reverse the removal procedure.

> Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Motor Relay > Component Information > Specifications

Radiator Cooling Fan Motor Relay: Specifications

Constant Control Relay Module Bolts ........................................................................................................................................... 8-11 Nm (71-97 In Lbs).

> Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Motor Relay > Component Information > Specifications > Page 61

Radiator Cooling Fan Motor Relay: Locations

Constant Control Relay Module (CCRM)

The Constant Control Relay Module is located at the LH front of the engine.

> Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Motor Relay > Component Information > Diagrams > Diagram Information and Instructions

Radiator Cooling Fan Motor Relay: Diagram Information and Instructions

How to Find and Use These Diagrams

Diagrams are presented in three main categories:

- Power Distribution Diagrams

- System Diagrams

- Grounds Diagrams

> Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Motor Relay > Component Information > Diagrams > Diagram Information and

Instructions > Page 64

Escort L4-122 2.0L SOHC VIN P SFI (1999)

> Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Motor Relay > Component Information > Diagrams > Diagram Information and

Instructions > Page 65

Escort L4-122 2.0L SOHC VIN P SFI (1999)

Diagram 13-7 (Sample Power Distribution Diagram Page)

Power Distribution Diagrams

Provide the circuit details of how the system diagrams are powered. The power distribution source is shown at the top of a diagram page. All wires,connectors, and splices are shown in the same manner that the current flows, ending at the component/system being powered near the bottom of adiagram page. Circuits that go from one diagram page to another will be marked with large arrow heads indicating which diagram page the circuit wentto/came from.
The power distribution diagrams can be found at Starting and Charging/Power and Ground Distribution, or by following the hyperlinks at the top of the

diagram pages within the system diagrams.

> Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Motor Relay > Component Information > Diagrams > Diagram Information and

Instructions > Page 66

Escort L4-122 2.0L SOHC VIN P SFI (1999)

Diagram 85-1 (Sample System Diagram Page)

System Diagrams

Components that work together are shown together in a system/subsystem diagram or set of diagrams. The system feed (circuit breaker, fuse, etc.) isshown at the top of a diagram page. All wires, connectors, components, and splices are shown in the same manner that the current flows, ending at theground at the bottom of a diagram page. Circuits that go from one diagram page to another will be marked with large arrow heads indicating whichdiagram page the circuit went to/came from.

> Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Motor Relay > Component Information > Diagrams > Diagram Information and

Instructions > Page 67

Escort L4-122 2.0L SOHC VIN P SFI (1999)

Diagram 10-1 (Sample Grounds Diagram Page)

Grounds Diagrams

Provide the circuit details of how the system diagrams are grounded. This information is useful for checking interconnections of the grounding circuits ofdifferent systems. The components/systems being grounded are shown at the top of a diagram page. All wires, connectors, and splices are shown in thesame manner that the current flows, ending at the ground at the bottom of a diagram page. Circuits that go from one diagram page to another will bemarked with large arrow heads indicating which diagram page the circuit went to/came from.

The grounds diagrams can be found at Starting and Charging/Power and Ground Distribution, or by following the hyperlinks at the bottom of thediagram pages within the system diagrams.

> Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Motor Relay > Component Information > Diagrams > Diagram Information and

Instructions > Page 68

Escort L4-122 2.0L SOHC VIN P SFI (1999)

> Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Motor Relay > Component Information > Diagrams > Diagram Information and

Instructions > Page 69

Escort L4-122 2.0L SOHC VIN P SFI (1999)

Electrical Symbols

Wire Color Code Identification

Wire and connector colors are listed as follows (standard Ford color abbreviations are used):

BUCOLOR ABBREVIATIONS

Blue NA Natural

BK Black OG Orange

BN Brown PK Pink
DB Dark Blue VT Purple
DG Dark Green RD Red
GN Green SR Silver
GY Gray TN Tan
LB Light Blue WH White
LG Light Green YE Yellow

Note:

Whenever a wire is labeled with two colors, the first color listed is the basic color of the wire, and the second color listed is the stripemarking of the wire.

> Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Motor Relay > Component Information > Diagrams > Diagram Information and Instructions> Page 70

Radiator Cooling Fan Motor Relay: Diagnostic Aids

HOW TO FIND ELECTRICAL CONCERNS

TROUBLESHOOTING STEPS

These six steps present an orderly method of troubleshooting.

Step 1. Verify the concern.

- Operate the complete system to check the accuracy and completeness of the customer's complaint.

Step 2. Narrow the concern.

- Using the wiring diagrams, narrow down the possible causes and locations of the concern to pinpoint the exact cause.

-

Read the description notes at the components and study the wiring schematic. You should then know enough about the circuit operation todetermine where to check for the trouble.

Step 3. Test the suspected cause.

- Use electrical test procedures to find the specific cause of the symptoms.

-

The component location reference bars and the pictures will help you find components. Component location information for connectors,diodes, resistors, splices and grounds can be found at Vehicle Locations. See: Locations

Step 4. Verify the cause.

-

Confirm that you have found the correct cause by connecting jumper wires and/or temporarily installing a known good component andoperating the circuit.

Step 5. Make the repair.

- Repair or replace the inoperative component.

Step 6. Verify the repair.

- Operate the system as in Step 1 and check that your repair has removed all symptoms without creating any new symptoms.

Some engine circuits may need special test equipment and special procedures. See Testing and Inspection for the specific component, system, orsub-system in question.

NOTE:

Most Ford testing and inspection procedures will be found at the system/sub-system level; only a few component tests are provided byOE.

TROUBLESHOOTING TOOLS

JUMPER WIRE

This is a test lead used to connect two points of a circuit. A Jumper Wire can bypass an open to complete a circuit.

WARNING: Never use a jumper wire across loads (motors,etc.) connected between hot and ground. This direct battery short may causeinjury or fire.

VOLTMETER

A DC Voltmeter measures circuit voltage. Connect negative (- or black) lead to ground, and positive (+ or red) lead to voltage measuring point.

OHMMETER

> Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Motor Relay > Component Information > Diagrams > Diagram Information and

Instructions > Page 71

Escort L4-122 2.0L SOHC VIN P SFI (1999)

An Ohmmeter shows the resistance between two connected points.

TEST LAMP

12-volt

A Test Light is a bulb with two test leads. Voltage Check, Short Check.Uses:

SELF-POWERED TEST LAMP

CAUTION: When using a self -powered test lamp or ohmmeter; be sure power is off in circuit during testing. Hot circuits can causeequipment damage and false readings.

In an inoperative circuit with a switch in series with the load, jumper the terminals of the switch to power the load. If jumpering the terminalspowers the circuit, the switch is inoperative.

CONTINUITY CHECK(Locating open circuits)

Connect one lead of Self-Powered Test Lamp or Ohmmeter to each end of circuit. Lamp will glow if circuit is closed. Switches and fuses can bechecked in the same way.

VOLTAGE CHECK

> Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Motor Relay > Component Information > Diagrams > Diagram Information and

Instructions > Page 72

Escort L4-122 2.0L SOHC VIN P SFI (1999)

The Self-Powered Test Lamp is a bulb, battery and set of test leads wired in series. When connected to two points of a continuous circuit, the bulbglows. Continuity Check, Ground Check.Uses:

Connect one lead of test lamp to a known good ground or the negative (-) battery terminal. Test for voltage by touching the other lead to the test

point. Bulb goes on when the test point has voltage.

SHORT CHECK

A fuse that repeatedly blows is usually caused by a short to ground. It's important to be able to locate such a short quickly.1. Turn off everything powered through the fuse.2. Disconnect other loads powered through the fuse:

- Motors: disconnect motor connector (Connector C4).

- Lights: remove bulbs.

3. Turn Ignition Switch to RUN (if necessary) to power fuse.4. Connect one Test Lamp lead to hot end of blown fuse. Connect other lead to ground. Bulb should glow, showing power to fuse. This step is

just a check to be sure you have power to the circuit)

5. Disconnect the test lamp lead that is connected to ground, and reconnect it to the load side of the fuse at the connector of the disconnected

component. (Connect the test lamp lead to connector C4).-

If the Test Lamp is off, the short is in the disconnected component.

-

GROUND CHECK

> Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Motor Relay > Component Information > Diagrams > Diagram Information and

Instructions > Page 73

Escort L4-122 2.0L SOHC VIN P SFI (1999)

If the Test Lamp goes on, the short is in the wiring. You must find the short by disconnecting the circuit connectors, one at a time, until theTest Lamp goes out. For example, with a ground at X, the bulb goes out when C1 or C2 is disconnected, but not after disconnecting C3.This means the short is between C2 and C3.

Turn on power to the circuit. Perform a Voltage Check between the suspected inoperative ground and the frame. Any indicated voltage means that theground is inoperative.

Turn off power to the circuit. Connect one lead of a Self-Powered Test Lamp or Ohmmeter to the wire in question and the other lead to a knownground. If the bulb glows, the circuit ground is OK.

DIAGRAMS

These diagrams make it easy to identify common points in circuits. This knowledge can help narrow the concern to a specific area. For example, ifseveral circuits fail at the same time, check for a common power or ground connection (see Power and Ground Distribution Diagrams). If part of a

circuit fails, check the connections between the part that works and the part that doesn't work.

For example, if the lo beam headlamps work, but the high beams and the indicator lamp don't work, then power and ground paths must be good. Sincethe dimmer switch is the component that switches this power to the high beam lights and indicator, it is most likely the cause of failure.

TROUBLESHOOTING WIRING HARNESS AND CONNECTOR HIDDEN CONCERNS

The following illustrations are known examples of wiring harness, splices and connectors that will create intermittent electrical concerns. The concernsare hidden and can only be discovered by a physical evaluation as shown in each illustration.

NOTE:

Several components, such as the PCM, utilize gold plated terminals in their connections to the wiring harness. If those terminals need to bereplaced, they must be replaced with a gold plated terminal.

> Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Motor Relay > Component Information > Diagrams > Diagram Information and

Instructions > Page 74

Escort L4-122 2.0L SOHC VIN P SFI (1999)

> Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Motor Relay > Component Information > Diagrams > Diagram Information and

Instructions > Page 75

Escort L4-122 2.0L SOHC VIN P SFI (1999)

> Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Motor Relay > Component Information > Diagrams > Diagram Information and

Instructions > Page 76

Escort L4-122 2.0L SOHC VIN P SFI (1999)

> Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Motor Relay > Component Information > Diagrams > Diagram Information and Instructions > Page 77

> Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Motor Relay > Component Information > Diagrams > Diagram Information and Instructions > Page 78

Radiator Cooling Fan Motor Relay: Electrical Diagrams

Wiring Diagram

The wiring for the Constant Control Relay Module is included in each system that the module effects, the cooling fan system is included here for yourreference. The Internal Schematic is also available. See: Internal Schematic

> Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Motor Relay > Component Information > Diagrams > Diagram Information and

Instructions > Page 79

Escort L4-122 2.0L SOHC VIN P SFI (1999)

> Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Motor Relay > Component Information > Diagrams > Diagram Information and

Instructions > Page 80

Escort L4-122 2.0L SOHC VIN P SFI (1999)

Diagram 33-1

Diagram 33-2

> Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Motor Relay > Component Information > Diagrams > Page 81

Radiator Cooling Fan Motor Relay: Description and Operation

The constant control relay module uses a combination of relays and solid state switches to control the following systems:

- Engine cooling fan

- A/C clutch

- Fuel pump

- Powertrain control module power

The powertrain control module can interrupt A/C compressor operation through the constant control relay module under the following conditions:

- During engine start-up

-

Wide Open Throttle (WOT)

- Low engine idle conditions

- Excessively high engine temperatures

> Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Motor Relay > Component Information > Diagrams > Page 82

Radiator Cooling Fan Motor Relay: Service and Repair

No specific Removal sequence/procedure is given by the OEM, however we do have:

The Description. See: Relays and Modules - Powertrain Management/Relays and Modules - Computers and Control Systems/Integrated ControlRelay Module/Description and OperationThe Location. See: Relays and Modules - Powertrain Management/Relays and Modules - Computers and Control Systems/Integrated Control RelayModule/LocationsThe Torque Specs. See: Relays and Modules - Powertrain Management/Relays and Modules - Computers and Control Systems/Integrated ControlRelay Module/Specifications