Ford Mustang 1998 3.8L VIN 4 Workshop Manual

ford :: Ford Mustang V6-3.8L VIN 4 (1998)

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

Alarm Module: Specifications

Anti-Theft Transceiver Module Screw ........................................................................................................................................................ 2 N.m (18 Lb-In)Passive Anti-Theft System Control Module Retaining Screw ............................................................................................................... 2.4-4.0 (22-35 Lb-In)

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Locations > Anti-Theft Control Module

Alarm Module: LocationsAnti-Theft Control Module

Convertible

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

Control Module > Page 9

Mustang V6-3.8L VIN 4 (1998)

Full Body View (Convertible)

The Anti-Theft Controller Module is located at the LH rear of the trunk, behind trim panel.

Coupe

Full Body View (Coupe)

The Anti-Theft Controller Module is located at the LH rear of the trunk, behind trim panel.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Locations > Anti-Theft Control Module > Page 10

Alarm Module: LocationsPassive Anti-Theft System Module

Instrument Panel View

The Passive Anti-Theft System Module is located in instrument panel near wiper control module.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Diagrams > Anti-Theft Controller Module

Alarm Module: DiagramsAnti-Theft Controller Module

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Diagrams > Anti-Theft Controller Module > Page 13

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Diagrams > Anti-Theft Controller Module > Page 14

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

Alarm Module: Service and RepairKey Programming - Spare Key Programming Switch
NOTE:

^

(NGS/SBDS)

The Spare Key Programming Switch is a New STAR Generation Tester/Service Bay Diagnostic System programmable switchwhich provides the capability to enable/disable the normal customer Spare Key Programming Procedure detailed in the Owner's Manual (customercan program a spare ignition key by cycling two programmed ignition keys and then cycling the new key). This programmable switch is providedas a convenience for rental company fleets or other fleet purchasers who may not want the Spare Key Programming procedure available to thevehicle driver.

^ The spare key programming switch state can be viewed by PATS PID SPARE__KY.

1. Insert a programmed ignition key into ignition switch and turn ignition switch from OFF to RUN.2. Enter NGS/SBDS. Follow the Security Access Procedure to obtain security access.3. From NGS/SBDS menu: Toggle SPARE KEY PROGRAMMING SWITCH selection to desired setting:
<ENABLE> Spare Key Programming Procedure is accessible.

<DISABLE> Spare Key Programming Procedure is not accessible.

The default setting on delivery of all new vehicles is <ENABLE>.NOTE:

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

Page 17

Alarm Module: Service and RepairRemoval and Installation

Anti-Theft System, Active

REMOVAL

1. Disconnect battery ground cable.2. Open the luggage compartment door. Remove trim from LH side of luggage compartment.3. Disconnect electrical connectors from anti-theft alarm control.4. Remove anti-theft alarm control by pushing on the panel retaining tab below the anti-theft alarm control while sliding the anti-theft alarm control
down.

INSTALLATION

1. Follow removal procedure in reverse order.2. Test system for proper operation.

Anti-Theft System, Passive

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

Key Programming - Spare Key Programming Switch > Page 18

Mustang V6-3.8L VIN 4 (1998)

REMOVAL

1. Disconnect battery ground cable.2. Remove the steering column opening cover assembly and reinforcement to access Passive Anti-Theft System module located to right of(PATS)

fuse junction panel.

3. Remove three fasteners retaining module and bracket and one fastener attaching metal brace near module.4. Disconnect main wiring harness connector and remove PATS module and mounting bracket.

INSTALLATION

NOTE:

The PATS module must be reconfigured after replacement. Review information found in the PATS Configuration Command Index. Foradditional reprogramming assistance, review the help screen on the New Generation STAR Tester configuration card.(NGS)

1. Follow removal procedure in reverse order.2. Tighten all three screws to .2.4-4.0 N.m (22-35 lb-in)

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

Page 19

Alarm Module: Service and RepairSpare Key Programming-Security Access Procedure

NOTE: (PATS)

(PID SPARE_KY)

10 minute

(NGS/SBDS)

The Security Access Procedure is utilized to obtain passive anti-theft system security access. PATS security access must be granted toerase ignition keys, enable/disable the spare key programming switch , or perform parameter resets for the PATS or PCM. TheSecurity Access Procedure invokes an inherent time delay prior to granting security access during which the New Generation STARTester/Service Bay Diagnostic System must remain connected to the vehicle. Once security access has been granted, a security accesscommand menu is displayed which offers various ignition key program, ignition key erase, and configuration command options (review the PATSConfiguration Command Index). Multiple commands may be performed as necessary before exiting this menu.

NOTE:

^

Once security access has been granted, multiple security access commands can be executed (if necessary) prior to exiting the security accesscommand menu. Execution of all necessary security access commands prior to exiting the command menu avoids the performance of an additionalSecurity Access Procedure and the associated time delay.10 minute

^

10 minute

Security access for the PATS and security access for the PCM must be obtained separately as needed (each requires a wait).1. From NGS/SBDS: From the Function Test menu: Enter SECURITY ACCESS PROCEDURE. This procedure will take to10 minutes

perform, during which the ignition switch must be in RUN and the NGS/SBDS must be connected to the vehicle.

2. After the Security Access Procedure has been completed, a new menu will be displayed with configuration and clearing options.10 minute

Select as many of these functions as required before backing out of this menu. Once backed out of this menu, the Security Access Proceduremust be performed again before any further configuration and clearing can take place.

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

Page 20

Alarm Module: Service and RepairSpare Key Programming-With Programmed Keys
NOTE:

^

This procedure only works if two or more programmed ignition keys are available and it is desired to program additional key(s). If two keys arenot available follow Spare Key Programming - Without Programmed Key.

^

PID SPAR_KY must be enabled for this procedure to operate. If this PID is not enabled, follow the Security Access Procedure, then select SpareKey Programming Switch: Enabled.

^

If the programming procedure is successful, the new key(s) will start the vehicle and the THEFT INDICATOR will illuminate for approximately .3seconds

^

1 minute 1 minute

If the programming procedure is not successful, the new key(s) will not start the vehicle and the THEFT INDICATOR will flash for (after flashing for , the THEFT INDICATOR will flash the fault code). If the programming procedure was not successful repeat the KeyProgramming procedure from Step 1. If the failure repeats, review DTCs and perform Pinpoint Tests.

^

A maximum of 8 ignition keys can be programmed to a Passive Anti-theft System equipped vehicle.(PATS)

^ If the steps are not performed as outlined, the programming procedure will end.
^ Ignition keys must have correct mechanical key cut for the vehicle and must be a PATS encoded key.

1. Insert first programmed ignition key into ignition switch and turn ignition switch from OFF to RUN (maintain ignition switch in RUN for 1 second

.

2. Turn ignition switch to OFF and remove first key from ignition switch.3. Within of turning the ignition switch to OFF, insert second programmed ignition key into ignition switch and turn ignition switch from5 seconds
OFF to RUN (maintain ignition switch in RUN for ).1 second

4. Turn ignition switch to OFF and remove second key from ignition switch.5. Within of turning the ignition switch to OFF, insert the unprogrammed ignition key (new key) into ignition switch and turn ignition10 seconds
switch from OFF to RUN (maintain ignition switch in RUN for ).1 second

6. If it is desired to program additional key(s), repeat the key Programming Procedure from the beginning.

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

Page 21

Alarm Module: Service and RepairSpare Key Programming-Without Programmed Keys
NOTE:

^

This procedure is for the situation where a customer needs keys programmed into the system and does not have 2 programmed ignition keysavailable. This procedure is also useful when programmed ignition key(s) have been lost or the ignition switch assembly has been replaced, and itis desired to erase key(s) from Passive Anti-theft System memory.(PATS)

^

This procedure will erase all programmed ignition keys from vehicle memory and the vehicle will not start until two keys have been reprogrammedto the vehicle.

^

Two PATS encoded keys with the correct mechanical cut must be available to perform this procedure. One or both of them may be the customer'soriginal keys.

^

If additional keys are to be programmed, follow key Programming - With Programmed keys. If the remaining keys are with the customer and arenot available with the vehicle, then instruct the customer to review their Owner's Manual under "Programming Spare keys Procedure" forinstructions on programming their remaining keys.

1. Turn ignition switch from OFF to RUN.2. Enter New Generation STAR Tester/Service Bay Diagnostic System . Follow the Security Access Procedure to obtain security(NGS/SBDS)

access.

three seconds
three seconds

3. From NGS/SBDS menu: Select IGNITION KEY CODE ERASE.4. Turn ignition switch to OFF and disconnect the NGS.5. Insert first encoded key into the ignition switch and turn the switch to RUN for .6. Insert the second encoded key into the ignition switch and turn the switch to RUN for .7. Vehicle should now start with both ignition keys.

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

Keyless Entry Module: LocationsConvertible

Full Body Views (Convertible)

The Remote/Keyless Entry Module is located at the LH rear of trunk, behind side trim.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Keyless Entry Module > Component Information > Locations > Convertible > Page 26

Keyless Entry Module: LocationsCoupe

Full Body View (Coupe)

The Remote/Keyless Entry Module is located at the LH rear of trunk, behind side trim.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Keyless Entry Module > Component Information > Locations > Page 27

Keyless Entry Module: Diagrams

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Keyless Entry Module > Component Information > Locations > Page 28

Mustang V6-3.8L VIN 4 (1998)

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Keyless Entry Module > Component Information > Locations > Page 29

Keyless Entry Module: Description and Operation

- The remote keyless entry module is located behind the LH luggage compartment trim panel.

­It contains a radio receiver that receives a signal from the keyless entry remote transmitter through the remote keyless entry module internalantenna.

­It sends the appropriate command to the power door locks, the horn relay, the park lamps, the luggage compartment door solenoid, and theanti-theft warning system if equipped.

­The remote keyless entry module is equipped with a battery backup which holds the programmed code in memory when the vehicle battery isdisconnected.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Keyless Entry Module > Component Information > Locations > Page 30

Keyless Entry Module: Service and Repair

REMOVAL

1. Disconnect battery ground cable.2. Open luggage compartment door.3. Remove LH side luggage compartment trim panel and locate remote keyless entry module in LH relay mounting panel.4. Disengage retaining tabs on relay mounting panel and lower relay mounting panel.5. Remove the remote keyless entry module from the relay mounting panel.6. Disconnect three connectors.

INSTALLATION

1. Follow removal procedure in reverse order.

> Relays and Modules > Relays and Modules - Body and Frame > Convertible Top Relay > Component Information > Locations > Lower Relay

Convertible Top Relay: LocationsLower Relay

Full Body Views (Convertible)

The Lower Relay is located behind rear seat, at the LH side of the convertible top motor.

> Relays and Modules > Relays and Modules - Body and Frame > Convertible Top Relay > Component Information > Locations > Lower Relay > Page 36

Convertible Top Relay: LocationsRaise Relay

Full Body Views (Convertible)

The Raise Relay is located behind top center of rear seat, at the LH side of the convertible top motor.

> Relays and Modules > Relays and Modules - Body and Frame > Convertible Top Relay > Component Information > Diagrams > Lower Relay

> Relays and Modules > Relays and Modules - Body and Frame > Convertible Top Relay > Component Information > Diagrams > Lower Relay > Page 39

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

Keyless Entry Module: LocationsConvertible

Full Body Views (Convertible)

The Remote/Keyless Entry Module is located at the LH rear of trunk, behind side trim.

> Relays and Modules > Relays and Modules - Body and Frame > Keyless Entry Module > Component Information > Locations > Convertible > Page 44

Keyless Entry Module: LocationsCoupe

Full Body View (Coupe)

The Remote/Keyless Entry Module is located at the LH rear of trunk, behind side trim.

> Relays and Modules > Relays and Modules - Body and Frame > Keyless Entry Module > Component Information > Locations > Page 45

Keyless Entry Module: Diagrams

> Relays and Modules > Relays and Modules - Body and Frame > Keyless Entry Module > Component Information > Locations > Page 46

Mustang V6-3.8L VIN 4 (1998)

> Relays and Modules > Relays and Modules - Body and Frame > Keyless Entry Module > Component Information > Locations > Page 47

Keyless Entry Module: Description and Operation

- The remote keyless entry module is located behind the LH luggage compartment trim panel.

­It contains a radio receiver that receives a signal from the keyless entry remote transmitter through the remote keyless entry module internalantenna.

­It sends the appropriate command to the power door locks, the horn relay, the park lamps, the luggage compartment door solenoid, and theanti-theft warning system if equipped.

­The remote keyless entry module is equipped with a battery backup which holds the programmed code in memory when the vehicle battery isdisconnected.

> Relays and Modules > Relays and Modules - Body and Frame > Keyless Entry Module > Component Information > Locations > Page 48

Keyless Entry Module: Service and Repair

REMOVAL

1. Disconnect battery ground cable.2. Open luggage compartment door.3. Remove LH side luggage compartment trim panel and locate remote keyless entry module in LH relay mounting panel.4. Disengage retaining tabs on relay mounting panel and lower relay mounting panel.5. Remove the remote keyless entry module from the relay mounting panel.6. Disconnect three connectors.

INSTALLATION

1. Follow removal procedure in reverse order.

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

Electronic Brake Control Module: Specifications

Retaining Bolts ......................................................................................................................................................................... 2.4-3.4 Nm (21-30 inch lbs.)

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

Electronic Brake Control Module: Locations

Engine View

The Anti-Lock Brake Control Module is located at the RH front of the engine compartment, behind radiator.

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

Anti-Lock Brake System (Part 2 Of 2)

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

Electronic Brake Control Module: Description and Operation

(DTCs)

The anti-lock control module also has on-board diagnostic capabilities and stores Diagnostic Trouble Codes in its memory. If a fault isdetected in the system, a DTC will be stored in the anti-lock brake control module memory, and the instrument panel ANTI-LOCK warning indicatorwill illuminate when the engine is running.The anti-lock brake control module has the ability to store three DTCs in memory.When the anti-lock brake control module detects an impending wheel lock, it modulates brake pressure to the appropriate brake caliper.The anti-lock brake control module receives wheel speed readings from each brake anti-lock sensor, and uses this information to compare wheelspeeds.By continuously monitoring and comparing the rotational speed of each wheel, the anti-lock brake control module activates the anti-lock brakingsystem only when it senses an impending wheel lock-up under severe braking conditions. The anti-lock brake control module decides which brakesneed to be controlled, and sends the appropriate signals to the Hydraulic Control Unit (hydraulic portion of the assembly). Impending wheel lockconditions trigger signals from the Hydraulic Control Unit that open and close the appropriate modulator solenoid valves. This may result in moderatepulsations in the brake pedal when applied. During normal braking (non-ABS stop), brake pedal feel will be the same as a vehicle with a standardbrake system (non-ABS).

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

Electronic Brake Control Module: Service and Repair

REMOVAL

1. Remove the EHCU.2. Disconnect the pump motor connector.3. Remove the six mounting screws.4. Remove the control module.

INSTALLATION

1. Carefully fit the coils of the control module over the valve bodies of the hydraulic unit.

CAUTION:

­Position the spring plate for proper installation. Failure to do so can result in the loss of the anti-lock brake system, although normalbraking system will remain.

- Be sure the sealing surface of the hydraulic unit is clear of all foreign material. Do not use any chemical solvents on the hydraulic unit.

2. Tighten the screws in proper sequence as shown to .2.4-3.4 Nm
NOTE:

Do not reuse the screws, install the new screws that are supplied in the service kit. Hand tighten the six screws into the HCU beforetightening to specification.

3. Remove and retighten the screws to specification as necessary.

Check for any gaps between the control module and the hydraulic unit.NOTE:

4. Connect the pump motor electrical connector.5. Install the EHCU.6. Bleed the brake system.

> Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Control Module > Component Information > Specifications

Radiator Cooling Fan Control Module: Specifications

Wiring Harness Bolt ................................................................................................................................................................. 1.3-2.0 Nm (12-18 inch lbs.)

> Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Control Module > Component Information > Specifications > Page 61

Radiator Cooling Fan Control Module: Description and Operation
PURPOSE

(CCRM) (PCM)

The Constant Control Relay Module interfaces with the Powertrain Control Module to provide control of the cooling fan andA/C clutch. The module includes the PCM power relay to provide power to the PCM.These relays are contained in one housing, resulting in longer service life and reduced wiring requirements for operation.

CONSTRUCTION

The CCRM has one 24-pin connector. Relays contained in the housing are independent of one another.

OPERATION

The relays contained within the CCRM are interdependent and work with each other. The following describes the different relay functions withinthe CCRM:

EEC Power Relay

For any other circuit in the CCRM to operate, this circuit must be powered up. This prevents actuators from being turned on without the EECsystem having control over them.

Fuel Pump Relay

The fuel pump relay circuit controls the fuel pump. The PCM provides the ground circuit for the primary side of the relay. The secondary sidesupplies Battery Voltage to the fuel pump itself.(B+)

Cooling Fan Motor Relay

(CCRM)

(PCM)

The cooling fan motor is controlled during vehicle operation by the constant control relay module (12B581) and powertrain controlmodule (12A650) which energizes the cooling fan motor under the following conditions:-

105C (221F)

When the engine temperature is higher than normal the cooling fan motor starts operating at and stops when temperaturedrops to .94C (200F)

-

When vehicle A/C is on and vehicle speed does not provide enough natural airflow, the cooling fan motor starts running at or below and stops at .69km/h (43 mph) 77 km/h (48 mph)

Low Fan Control Relay

(LFC) (B+)

The Low Fan Control relay controls the electric cooling fan. The primary control circuit of the LFC relay is normally high . In thisstate the low speed cooling fan runs continuously. To turn the fan off, The PCM grounds this circuit, pulling it low (near zero volts). A "failsafe" is built into the LFC circuit to run the fan anytime the EEC power relay is activated, should the PCM fail open circuit.

High Fan Control Relay

(HFC) (ECT)

The High Fan Control relay circuit operates the high speed electric cooling fan. If the Engine Coolant Temperature sensorrelays a high temperature or overheat condition to the PCM, it activates the HFC. In order to turn the high speed cooling fan on, the PCMgrounds the primary circuit of the HFC relay. The secondary circuit applies B+ to the cooling fan motor.

Wide Open Throttle A/C Control Relay

(WOT)

This circuit controls the A/C compressor clutch during normal operation. This circuit also disengages the A/C clutch as commanded by the PCM during Wide Open Throttle conditions. This solid state relay has two control circuits. One is used to engage the A/C clutch upondemand from the vehicle operator and the A/C cycling pressure switch. The other control is used to disengage the clutch upon command fromthe PCM.

Power Ground

This circuit provides the CCRM with a ground source for operating various controls. The circuit uses one pin that goes to the battery negativeterminal.

> Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Control Module > Component Information > Specifications > Page 62

Radiator Cooling Fan Control Module: Service and Repair

REMOVAL

(CCRM)

1. Remove inner fender splash shield (RH).2. Disconnect wiring harness from Constant Control Relay Module .3. Remove constant control relay module retaining screws.

INSTALLATION

1. Follow removal procedure in reverse order.2. Tighten constant control relay module retaining screws securely. Tighten wiring harness bolt to 1.3-2.0 Nm (12-17 in. lbs.).

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

Radiator Cooling Fan Motor Relay: Locations

Engine View

> Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Motor Relay > Component Information > Locations > Page 66

> Relays and Modules > Relays and Modules - Cooling System > Radiator Cooling Fan Motor Relay > Component Information > Locations > Page 67

Radiator Cooling Fan Motor Relay: Description and Operation
PURPOSE

(CCRM) (PCM)

The Constant Control Relay Module interfaces with the Powertrain Control Module to provide control of the cooling fan andA/C clutch. The module includes the PCM power relay to provide power to the PCM.These relays are contained in one housing, resulting in longer service life and reduced wiring requirements for operation.

CONSTRUCTION

The CCRM has one 24-pin connector. Relays contained in the housing are independent of one another.

OPERATION

The relays contained within the CCRM are interdependent and work with each other. The following describes the different relay functions withinthe CCRM:

EEC Power Relay

For any other circuit in the CCRM to operate, this circuit must be powered up. This prevents actuators from being turned on without the EECsystem having control over them.

Fuel Pump Relay

The fuel pump relay circuit controls the fuel pump. The PCM provides the ground circuit for the primary side of the relay. The secondary sidesupplies Battery Voltage to the fuel pump itself.(B+)

Cooling Fan Motor Relay

(CCRM)

(PCM)

The cooling fan motor is controlled during vehicle operation by the constant control relay module (12B581) and powertrain controlmodule (12A650) which energizes the cooling fan motor under the following conditions:-

105C (221F)

When the engine temperature is higher than normal the cooling fan motor starts operating at and stops when temperaturedrops to .94C (200F)

-

When vehicle A/C is on and vehicle speed does not provide enough natural airflow, the cooling fan motor starts running at or below and stops at .69km/h (43 mph) 77 km/h (48 mph)

Low Fan Control Relay

(LFC) (B+)

The Low Fan Control relay controls the electric cooling fan. The primary control circuit of the LFC relay is normally high . In thisstate the low speed cooling fan runs continuously. To turn the fan off, The PCM grounds this circuit, pulling it low (near zero volts). A "failsafe" is built into the LFC circuit to run the fan anytime the EEC power relay is activated, should the PCM fail open circuit.

High Fan Control Relay

(HFC) (ECT)

The High Fan Control relay circuit operates the high speed electric cooling fan. If the Engine Coolant Temperature sensorrelays a high temperature or overheat condition to the PCM, it activates the HFC. In order to turn the high speed cooling fan on, the PCMgrounds the primary circuit of the HFC relay. The secondary circuit applies B+ to the cooling fan motor.

Wide Open Throttle A/C Control Relay

(WOT)

This circuit controls the A/C compressor clutch during normal operation. This circuit also disengages the A/C clutch as commanded by the PCM during Wide Open Throttle conditions. This solid state relay has two control circuits. One is used to engage the A/C clutch upondemand from the vehicle operator and the A/C cycling pressure switch. The other control is used to disengage the clutch upon command fromthe PCM.

Power Ground

This circuit provides the CCRM with a ground source for operating various controls. The circuit uses one pin that goes to the battery negativeterminal.

> Relays and Modules > Relays and Modules - Cruise Control > Cruise Control Module > Component Information > Diagrams

> Relays and Modules > Relays and Modules - HVAC > Compressor Clutch Relay > Component Information > Locations

Compressor Clutch Relay: Locations

Engine View

> Relays and Modules > Relays and Modules - HVAC > Compressor Clutch Relay > Component Information > Locations > Page 76

> Relays and Modules > Relays and Modules - HVAC > Compressor Clutch Relay > Component Information > Locations > Page 77

Compressor Clutch Relay: Description and Operation
PURPOSE

(CCRM) (PCM)

The Constant Control Relay Module interfaces with the Powertrain Control Module to provide control of the cooling fan andA/C clutch. The module includes the PCM power relay to provide power to the PCM.These relays are contained in one housing, resulting in longer service life and reduced wiring requirements for operation.

CONSTRUCTION

The CCRM has one 24-pin connector. Relays contained in the housing are independent of one another.

OPERATION

The relays contained within the CCRM are interdependent and work with each other. The following describes the different relay functions withinthe CCRM:

EEC Power Relay

For any other circuit in the CCRM to operate, this circuit must be powered up. This prevents actuators from being turned on without the EECsystem having control over them.

Fuel Pump Relay

The fuel pump relay circuit controls the fuel pump. The PCM provides the ground circuit for the primary side of the relay. The secondary sidesupplies Battery Voltage to the fuel pump itself.(B+)

Cooling Fan Motor Relay

(CCRM)

(PCM)

The cooling fan motor is controlled during vehicle operation by the constant control relay module (12B581) and powertrain controlmodule (12A650) which energizes the cooling fan motor under the following conditions:-

105C (221F)

When the engine temperature is higher than normal the cooling fan motor starts operating at and stops when temperaturedrops to .94C (200F)

-

When vehicle A/C is on and vehicle speed does not provide enough natural airflow, the cooling fan motor starts running at or below and stops at .69km/h (43 mph) 77 km/h (48 mph)

Low Fan Control Relay

(LFC) (B+)

The Low Fan Control relay controls the electric cooling fan. The primary control circuit of the LFC relay is normally high . In thisstate the low speed cooling fan runs continuously. To turn the fan off, The PCM grounds this circuit, pulling it low (near zero volts). A "failsafe" is built into the LFC circuit to run the fan anytime the EEC power relay is activated, should the PCM fail open circuit.

High Fan Control Relay

(HFC) (ECT)

The High Fan Control relay circuit operates the high speed electric cooling fan. If the Engine Coolant Temperature sensorrelays a high temperature or overheat condition to the PCM, it activates the HFC. In order to turn the high speed cooling fan on, the PCMgrounds the primary circuit of the HFC relay. The secondary circuit applies B+ to the cooling fan motor.

Wide Open Throttle A/C Control Relay

(WOT)

This circuit controls the A/C compressor clutch during normal operation. This circuit also disengages the A/C clutch as commanded by the PCM during Wide Open Throttle conditions. This solid state relay has two control circuits. One is used to engage the A/C clutch upondemand from the vehicle operator and the A/C cycling pressure switch. The other control is used to disengage the clutch upon command fromthe PCM.

Power Ground

This circuit provides the CCRM with a ground source for operating various controls. The circuit uses one pin that goes to the battery negativeterminal.

> Relays and Modules > Relays and Modules - Instrument Panel > Audible Warning Device Control Module > Component Information > Locations

Audible Warning Device Control Module: Locations

Instrument Panel View

The Warning Chime Module is located behind center of the instrument panel, RH side of the radio.

> Relays and Modules > Relays and Modules - Instrument Panel > Audible Warning Device Control Module > Component Information > Locations > Page 82

> Relays and Modules > Relays and Modules - Instrument Panel > Audible Warning Device Control Module > Component Information > Locations > Page 83

Audible Warning Device Control Module: Description and Operation

Warning Chime Systems

The warning chime module will sound the following warnings:

^ key-in-ignition warning
^ safety belt warning
^ headlamp switch ON warning

Key In Ignition Warning

The warning chime sounds when the LH door is opened with the key in the ignition switch lock cylinder:

^ The chime continues to sound until the key is removed or the door is closed.
^

When the key is in ignition switch lock cylinder, the ignition key warning switch is closed and ground is supplied through Circuit 158 (BK/PK) tothe warning chime module.

^ When the LH door is open, the door lamp switch closes and power is supplied through Circuit 159 (R/PK) to the module.

Safety Belt Warning

When ignition switch is turned to RUN or START:

^ Power is supplied through Circuit 640 (R/Y) to the warning chime module.
^

six seconds
The module then supplies power through Circuit 450 (DG/LG) to illuminate the safety belt warning indicator lamp for up to , whetheror not the LH front safety belt is fastened. If ignition key is quickly turned to OFF and then back to RUN, the warning lamp will illuminate for lessthan .six seconds

^

If the LH front safety belt is not fastened during this time, the safety belt buckle switch remains closed, supplying ground through Circuit 85(BR/LB) to the warning chime module and causing it to sound for .six seconds

Headlamp Switch On Warning

The warning chime sounds when the LH door is opened while the main headlamp switch is in headlamp or parking lamp position.

^ It continues to sound until the headlamp switch is turned OFF or the door is closed.
^ When the headlamp switch is in headlamp or parking lamp position, power is supplied through Circuit 14 (BR) to the warning chime module.
^ When the LH door is open, the LH door lamp switch is closed and power is supplied through Circuit 159 (R/PK) to the module.

> Relays and Modules > Relays and Modules - Instrument Panel > Audible Warning Device Control Module > Component Information > Testing and Inspection > Initial Inspection and Diagnostic Overview

Audible Warning Device Control Module: Initial Inspection and Diagnostic Overview

1. Verify the customer's concern by operating the warning chime system to duplicate the condition.2. Inspect to determine if one of the following electrical concerns apply:

VISUAL INSPECTION CHART

Electrical

^

Check fuse junction panel Fuses or 6 (15A), 15 (10A), 5 (15A) 8 (10A)

^ Check connectors for loose connection damage corrosion
^ Check circuits for shorts/opens.

3. If the inspection reveals obvious concerns that can be readily identified, repair as required.4. If the concern(s) remains after the inspection, determine the symptom(s) and go to Symptom Chart.

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Audible Warning Device Control Module: Pinpoint Tests

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