Ford Falcon. Manual — part 205

303-14-34

Powertrain Control Management

303-14-34

DESCRIPTION AND OPERATION (Continued)

2. Where ABS and traction control is fitted, ensure

Circuit

that the warning lights are not illuminated. Rectify

before continuing.

3. Connect a WDS tester to the diagnostic

connector.

4. Check the check the Output Shaft Speed and the

Vehicle Speed on the WDS screen. If these reads

0, check the electrical connections between the

PCM and the vehicle speed source.

5. If vehicle speed is inaccurate, reconfigure the

PCM VID block as detailed in the Module

Configuration section.

PID Specification

PID

Description

AXLE

Axle Ratio used by the PCM

Diagnosis

TIRE SIZE

Tire size used by the PCM - revs

DTCs applicable to this sensor are shown on the

per mile

following table.

Vehicle Speed Output (VSOUT)

DTC

Test Mode

Condition

The PCM transmits a 12V square wave vehicle speed

P2122

KOEO Cont

PPS1 fails - Out-of-range

output signal on the VSOUT pin for the satellite

low

navigation system. This pin may be used to drive

P2123

KOEO Cont

PPS1 fails - Out-of-range

other devices such as taximeters. The recommended

high

load for this pin is 4.7 to 15 k

Ω to ground.

P2124

KOEO Cont

PPS1 fails - intermittent,

Connections

Out-of-range

P2138

KOEO Cont

PPS1 fails - In-range

PCM Pin B7

. . . . . . …. VSOUT

P2139

(one sensor disagrees)

Electronic Throttle Control Inputs

P2127

KOEO Cont

PPS2 fails - Out-of-range

low

Pedal Position Sensor

P2128

KOEO Cont

PPS2 fails - Out-of-range

A triple output Throttle Position Sensor (TPS) is used

high

to provide pedal position signal to the PCM. It has an

P2129

KOEO Cont

PPS2 fails - intermittent,

8-way electrical connector providing 3 independent

Out-of-range

potentiometer signals.

P2138

KOEO Cont

PPS2 fails - In-range

P2140

(one sensor disagrees)

Connections

P2132

KOEO Cont

PPS3 fails - Out-of-range

PCM Pin B17

. . .. . . PPS1 Signal

low

PCM Pin B18

. . .. . . PPS2 Signal

P2133

KOEO Cont

PPS3 fails - Out-of-range

PCM Pin B19

. . .. . . PPS3 Signal

high

PCM Pin B20

. . .. . ... PPSVREF1

P2134

KOEO Cont

PPS3 fails - intermittent,

PCM Pin B28

. . .. . ….…. PPSVREF2

Out-of-range

PCM Pin B21

. . . . . ….PPSRTN1

P2139

KOEO Cont

PPS3 fails - In-range

P2140

(one sensor disagrees)

PCM Pin B29

. . . . . …. PPSRTN2

P2110

KOEO Cont

Two or three PPS fail

(pedal position > or = no

pedal)

Failure Mode

The Failure Mode Effects Management (FMEM)

strategy will, in most cases, ensure normal operation

of the vehicle if one of the PPS potentiometers fail.

The ETC warning light will flash. If two or more

sensors fail, the ETC will default to limp home part

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303-14-35

Powertrain Control Management

303-14-35

DESCRIPTION AND OPERATION (Continued)

throttle mode. The appropriate trouble code will be

Circuit

logged in memory for retrieval during Self-test mode.

Testing

The PPS sensor is tested continuously during vehicle

operation (cont.) and whenever Key On Engine Off

(KOEO) or Key On Engine Running (KOER) test are

performed.
Testing Pedal Position Sensor
1. Connect a WDS tester to the diagnostic

connector.

2. Check the Parameter Identification (PID) value of

the PPS. If the PID value is within specification,

then check for other Diagnostic Trouble Code

(DTC) or component faults

PID Specification

Diagnosis
DTCs applicable to this sensor are shown on the

PID

Description

following table

APP_F

Accelerator Pedal Position Status

APP_MODE

Pedal position mode: -1=pedal not

DTC

Test Mode

Condition

depressed, 0=pedal partially

P0122

KOEO Cont.

TP1-NS fails -

depressed, 1=pedal fully depressed

Out-of-range low

APP1

Voltage of the Pedal Position Sensor

P0123

KOEO Cont.

TP1-NS fails -

number 1 (PPS1) at the PCM

Out-of-range high

connector pin, relative to signal return

P0124

KOEO Cont.

TP1-NS fails -

(SIGRTN)

intermittent, Out-of-range

APP2

Voltage of the Pedal Position Sensor

P0221

KOEO Cont.

TP2-PS fails -

number 2 (PPS2) at the PCM

Out-of-range at

connector pin, relative to signal return

commanded settings

(SIGRTN)

P0222

KOEO Cont.

TP2-PS fails -

APP3

Voltage of the Pedal Position Sensor

Out-of-range low

number 3 (PPS3) at the PCM

P0223

KOEO Cont.

TP2-PS fails -

connector pin, relative to signal return

Out-of-range high

(SIGRTN)

P0224

KOEO Cont.

TP2-PS fails -

Throttle Position Sensor

intermittent, Out-of-range

P1124

KOEO,KOER

Throttle Out Of Self-test

A dual (opposing slope) output Throttle Position

Range

Sensor (TPS) is used to provide feedback to the

Powertrain Control Module (PCM). It has a four way

P2111

Cont.

Throttle Actuator Control

electrical connector providing 5v supply, a return and

System - Higher throttle

two output signals. The TPS is replaceable in service

opening than driver

and simply bolts onto the ETB in one orientation only

demand

by way of a locating pin on the TPS.

P2112

Cont.

Throttle Actuator Control

System - Lower throttle

Connections

opening than driver

PCM Pin A44

. . . . . … TP1 Signal

demand

PCM Pin A16

. . . . . … TP2 Signal

P2135

KOEO Cont.

Sensor disagreement, in

PCM Pin A21

. . . . …..…. TPS_VREF

range

PCM Pin A22

. . . . . …. TPS_RTN

P0124

KOEO Cont.

Intermittent sensor

P0224

disagreement, in range

P0124

KOEO Cont.

Both TPS fail -

P0224

Out-of-range intermittent

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303-14-36

Powertrain Control Management

303-14-36

DESCRIPTION AND OPERATION (Continued)

Failure Mode

Connections

The Failure Mode Effects Management (FMEM)

PCM Pin B5

. . . . . . . . CES

strategy will, in most cases, ensure normal operation

Circuit

of the vehicle if one of the TPS potentiometers fails.

The ETC warning light will flash. If both sensors fail,

the ETC will default to limp home part throttle mode.

The appropriate trouble code will be logged in

memory for retrieval during Self-test mode.

Testing

The TPS sensor is tested continuously during vehicle

operation (cont.) and whenever Key On Engine Off

(KOEO) or Key On Engine Running (KOER) test are

performed.
Testing Throttle Position Sensor
1. Connect a WDS tester to the diagnostic

connector.

2. Check the Parameter Identification (PID) value of

the TPS. If the PID value is within specification,

Failure Mode

then check for other Diagnostic Trouble Code

(DTC) or component faults.

Failure of clutch switch in the open circuit position will

inhibit speed control operation. A shorted CES will

PID Specification

result in engine flaring to a high engine rpm when the

clutch pedal is depressed with the speed control

PID

Description

engaged.

ETC_ACT

The actual throttle angle in degrees

Testing

as determined from the throttle

sensor inputs.

Testing Clutch Engagement Switch

TP1

Voltage of the Electronic Throttle

1. Connect a WDS tester to the diagnostic

Control (ETC) Throttle Position

connector.

Sensor number 1 (TPS1) at the PCM

2. Check the Parameter Identification (PID) value of

connector pin, relative to signal return

the CES while depressing and releasing the

(TPS_RTN)

clutch pedal.

TP2

Voltage of the Electronic Throttle

PID

Description

Control (ETC) Throttle Position

Sensor number 2 (TPS2) at the PCM

CPP

Clutch Pedal Depressed

connector pin, relative to signal return

(TPS_RTN)

Brake Switches

The PCM monitors the brake pedal position using two

Clutch Engagement Switch, Manual

switches - the Brake On-Off (BOO) switch and the

Transmission

Redundant Brake Switch (RBS). Both switches are

The PCM monitors clutch engagement using the

mounted on the pedal assembly and are directly

Clutch Engagement Switch (CES). The CES is

actuated by the brake pedal. When the brakes are

mounted on the pedal assembly and is actuated by

applied, the PCM cancels speed control operation.

the clutch pedal in the released position. When the

BOO is a normally-open switch that switches 12V to

clutch is applied, the PCM cancels speed control

the PCM’s BOO input when the brakes are applied.

operation.

RBS is a normally-closed switch that switches 12V to

the PCM’s RBS input when the brakes are released.

BOO is designed to switch to 12V before RBS breaks

the circuit to 12V. If the RBS 12V circuit breaks

without the BOO switching to 12V, the speed control

cannot be engaged or re-engaged until the next

key-on.

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303-14-37

Powertrain Control Management

303-14-37

DESCRIPTION AND OPERATION (Continued)

gear selection. When 12V is sensed on RGS, engine

Connections

torque is limited to a suitable value for reverse gear

PCM Pin B25

. . . . . . . . BOO

operation. The switch status is transmitted on the

PCM Pin B32

. . . . . . . . RBS

CAN for the optional reverse parking sensor.

Circuit

Connections

PCM Pin B30

. . . . . . …. RGS

Diagnosis

Ensure that the reverse lamps operate correctly.

Rectify before continuing.
DTCs applicable to this sensor are shown on the

following table.

DTC

Test Mode

Condition

P0812

KOEO Cont

Reverse switch or

circuit faulty

Failure Mode

The ETC will implement reverse gear torque limiting

under the following conditions:

Diagnosis

RGS switch short circuit fault;

Ensure that the brake lamps operate correctly before

RGS wire open circuit;

continuing.

Both reverse lamps are faulty.

DTCs applicable to this sensor are shown on the

Testing

following table.

Testing Reverse Gear Switch

DTC

Test Mode

Condition

1. Ensure that the reverse lamps operate correctly.

P1572

KOEO Cont.

Brake switch circuit

Rectify before continuing.

faulty

2. Connect a WDS tester to the diagnostic

Failure Mode

connector.

3. Check the Parameter Identification (PID) value of

Failure of either brake switch will inhibit speed control

TRANS_GEAR while selecting reverse gear.

operation.

Testing

PID Specification

The BOO and RBS switches are tested continuously

PID

Description

during vehicle operation (cont.) and whenever Key On

TRANS_GEAR

Transmission Gear state

Engine Off (KOEO) or Key On Engine Running

(KOER) test are performed.

Speed Control Range Switch Assembly

Testing Brake Pedal Switches

The Speed Control Range Switch Assembly (SCRSA)

1. Connect a WDS tester to the diagnostic

is located right side of the steering wheel airbag. The

connector.

switches are resistively multiplexed and connect to

2. Check the Brake ON/OFF status on the WDS

the steering wheel clock spring wiring to the PCM.

screen and the Parameter Identification (PID)

Each switch connects a specific resistor value to

value of the BPA. If these are correct, check for

ground and produces a distinctive voltage level signal

other Diagnostic Trouble Code (DTC) or

at the SCRSA input. The PCM uses the SCRSA

component faults.

signal to determine driver command of the speed

control system.

PID Specification

PID

Description

BPA

Redundant Brake Pedal Switch

Status

Reverse Gear Switch

The PCM monitors the reverse gear switch (RGS) on

manual transmission vehicles to check for reverse

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