Ford Falcon. Manual — part 214

303-14-70

Powertrain Control Management

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DESCRIPTION AND OPERATION (Continued)

Input PID values can immediately confirm the status

of a sensor and its associated circuit to the Powertrain

Control Module (PCM). Similarly output PID values

can monitor the operation of an output device or

signal being sent from the PCM.
Use of PIDs minimises the need to perform pin out

tests. Circuit continuity and a sensor’s actual

operating value can be read directly from the WDS.

PIDs can optimize diagnostic time by quickly

identifying faulty components or circuits.

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Powertrain Control Management

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DIAGNOSIS AND TESTING

Diagnostic Communications

Powertrain Control Management

The PCM communicates with the Worldwide

Powertrain Control Management

Diagnostic System (WDS) tester through the

diagnostic connector using the Control Area Network

Diagnostic Trouble Codes

(CAN).

The PCM diagnostic system monitors the condition of

Resetting The Powertrain Control Module

various sensors and circuits associated with control of

the powertrain. A Diagnostic Trouble Code (DTC) is

NOTE: Do not disconnect the battery to clear the

reported and logged in memory to identify the specific Keep Alive Memory (KAM) or Diagnostic Trouble

area where a fault has been reported to the

Codes (DTC) unless absolutely necessary.

Powertrain Control Module (PCM).

Disconnecting the battery will clear the PCM memory,

including the adaptive values.

Retrieving Diagnostic Trouble Codes

Diagnostic data is accessible with the Worldwide

Clearing Diagnostic Trouble Codes (DTC)

Diagnostic System (WDS) tester to assist in

Once a system fault has been rectified, the diagnostic

diagnosing faults and operating conditions on the

trouble codes must be cleared from the PCM memory

vehicle. The system is accessed through the

using the Worldwide Diagnostic System (WDS) tester.

diagnostic connector situated in the fuse box, below

and to the right of the steering column.

1. Connect the Worldwide Diagnostic System (WDS)

tester to the diagnostic connector.

The functions and operation of the WDS are

described in the Worldwide Diagnostic System (WDS) 2. Initiating Retrieve/Clear Continuous DTCs.

Tester Instruction Manual.

3. After the codes appear on the screen, press

“CLEAR”, to erase DTCs from memory.

4. Verify the codes have been erased by test-driving

the vehicle and then repeat Step 2.

DTC

Description

Possible Causes

A979

AC Compressor Clutch

Refer to AC section

KOEO, KOER cycling due to ACPT cutout.

Cont
B2139

Incorrect BEM Response

IMMOBILIZATION SYSTEM

ACTION REQUIRED

KOEO, Cont.

Code.

CONDITION

Perform a Parameter Reset

PCM or BEM substituted on

operation to train the

vehicle

immobilization system

BEM does not recognise

Check BEM DTCs

ignition key

B2141

Incomplete PCM/BEM

IMMOBILIZATION SYSTEM

ACTION REQUIRED

KOEO, Cont.

training.

CONDITION

Check KAPWR to PCM, BEM

Unsuccessful PCM/BEM ID

operation, and CAN line

training

operation then perform

Parameter Reset operation

again

P0107

Temperature And

SENSOR CONDITION

ELECTRICAL CONDITION

KOEO, KOER, ManifoldAbsolute Pressure

Sensor damaged or faulty

Improper connection, signal

Cont.

(T-MAP) circuit low input

open circuit or shorted to

DTC P0107 is reported if the

ground, low Vehicle

manifold pressure sensor in

Reference Voltage (VREF),

the T-MAP Sensor is less

VREF open circuit

than the self- test range.

OTHER CONDITION

Manifold pressure has

changed but signal from

Throttle Position Sensor (TP)

<TPS> remains steady, PCM

damaged or faulty

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Powertrain Control Management

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DIAGNOSIS AND TESTING (Continued)

DTC

Description

Possible Causes

P0108

Temperature And

MECHANICAL CONDITION

ELECTRICAL CONDITION

KOEO, KOER, ManifoldAbsolute Pressure

Vacuum leak at manifold,

Improper connection, signal

Cont.

(T-MAP) circuit high input

sensor loose or not installed

shorted to Vehicle Power

DTC P0108 is reported if the on manifold

(VPWR), high Vehicle

manifold pressure sensor in

SENSOR CONDITION

Reference Voltage (VREF)

the T- MAP Sensor is

Sensor damaged or faulty

OTHER CONDITION

greater than the self-test

Manifold pressure has

range.

changed but signal from

Throttle Position Sensor (TP)

<TPS> remains steady, PCM

damaged or faulty

P0112

Intake air temperature signal SENSOR CONDITION

ELECTRICAL CONDITION

KOEO, KOER, (T-MAP sensor) circuit low

Faulty or malfunctioning

Improper connection,

Cont.

input.

sensor

incorrect Reference Voltage

DTC P0112 is reported if the

(VREF), sensor signal or

air temperature signal is less

Signal Return (SIGRTN)

than the self-test range.

shorted to ground

OTHER CONDITION

Extreme low ambient

temperature, faulty or

damaged PCM

P0113

Intake air temperature signal MECHANICAL CONDITION

ELECTRICAL CONDITION

KOEO, KOER, (T- MAP)

Clogged air filter

Improper connection,

Cont.

DTC P0113 is reported if the SENSOR CONDITION

incorrect Reference Voltage

air temperature signal is

Faulty or malfunctioning

(VREF),T-MAP sensor signal

greater than the self-test

sensor

shorted to VREF or Vehicle

range.

Power (VPWR), T-MAP

sensor signal open circuit,

Signal Return (SIGRTN) open

circuit

OTHER CONDITION

Extreme high ambient

temperature, PCM damaged

or faulty

P0121

Throttle Position Sensor (TP) MECHANICAL CONDITION

ELECTRICAL CONDITION

KOEO, KOER <TPS> circuit range/

Binding or bent throttle shaft

Improper connection,

performance problem

throttle plate below closed

corrosion on contacts or

DTC P0121 is reported if the position, throttle plate or base connectors, Reference

TP sensor signal is out of

idle screw maladjustment, TP Voltage (VREF) too low, TP

the self-test range.

sensor not properly secured

sensor signal or VREF open

or loose

circuit, TP signal shorted to

SENSOR CONDITION

Signal Return (SIGRTN) or

TP sensor loose or incorrectly ground

installed. TP sensor damaged OTHER CONDITION

or faulty; corrosion on TP

PCM faulty or damaged.

sensor brush, contaminated

TP sensor brush

P0122

Throttle Position Sensor

SENSOR CONDITION

ELECTRICAL CONDITION

KOEO, KOER, (TP1) circuit low input

TP1 sensor faultyor damaged. Improper connection,

Cont.

DTC P0122 is reported if the Check Throttle Position

corrosion on contacts or

TP sensor signal is less than Sensor Connector.

connectors, Reference

the self-test range.

Voltage (VREF) too low, TP

sensor signal or VREF open

circuit, TP signal shorted to

Signal Return (SIGRTN) or

ground

OTHER CONDITION

PCM damaged or faulty

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Powertrain Control Management

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DIAGNOSIS AND TESTING (Continued)

DTC

Description

Possible Causes

P0123

Throttle Position Sensor

SENSOR CONDITION

ELECTRICAL CONDITION

KOEO, KOER, (TP1) circuit high input

TP1 sensor faulty or

Improper connection, TP

Cont.

DTC P0123 is reported if the damaged. Check Throttle

sensor signal shorted to

TP sensor signal is greater

Position Sensor Connector.

Reference voltage (VREF) or

than the self-test range.

Vehicle Power (VPWR),

Signal Return (SIGRTN) open

circuit, Reference Voltage

(VREF) shorted to Vehicle

Power (VPWR)

P0124

Throttle/Pedal Position

SENSOR CONDITION

ELECTRICAL CONDITION

KOEO, KOER, Sensor Intermittent

TP1 sensor faulty or

Improper connection, TP

Cont.

DTC P0124 is reported if the damaged. Check Throttle

sensor signal shorted to

TP sensor signal is

Position Sensor Connector.

Reference voltage (VREF) or

intermittent

Vehicle Power (VPWR),

Signal Return (SIGRTN) open

circuit, Reference Voltage

(VREF) shorted to Vehicle

Power (VPWR)

P0171

Fuel System too lean (I6,

FUEL SYSTEM CONDITION

INTAKE AIR CONDITION

KOEO, KOER bank 1-V8)

External leak at fuel injectors, Defective positive crankcase

Cont

DTC P0171 is reported to

externally leaking fuel

ventilation system, faulty

indicate the air fuel ratio is

pressure regulator, leaking

Evaporative Purge (EVAP)

incorrect, too lean. The

fuel rail, inadequate pressure

Canister or Solenoid

adaptive fuel control strategy from fuel pump, fuel injectors

ELECTRICAL CONDITION

has reached the limit of

contaminated with foreign

Heated Exhaust Gas Oxygen

available mixture correction. material, blocked or restricted Sensor (HO2S) signal shorted

fuel filter

to ground; moisture in

harness connectors, blown

CAUTION: A leaking

HO2S heater fuse

fuel system poses a

OTHER CONDITION

potential fire hazard.

Leaking exhaust system; leak

at manifold slip joint, leaking

SENSOR CONDITION

joint between engine pipe and

Sensor damaged or faulty

catalyst converter, leak at

engine pipe to manifold joint,

damaged or leaking exhaust

P0172

Fuel System too rich (I6,

FUEL SYSTEM CONDITION

INTAKE AIR CONDITION

KOEO, KOER bank 1- V8)

Internally leaking fuel

Faulty or damaged

Cont

DTC P0172 is reported to

injectors, damaged fuel

Evaporative Canister Purge

indicate the air fuel ratio is

pressure regulator, obstructed Solenoid (EVAP) <CANP>,

incorrect, too rich. The

fuel return line, low or no

EVAP canister saturated with

adaptive fuel control strategy vacuum to fuel pressure

fuel

has reached the limit of

regulator; leaking, damaged

ELECTRICAL CONDITION

available mixture correction. or missing vacuum hose to

Heated Exhaust Gas Oxygen

fuel pressure regulator.

Sensor (HO2S) signal shorted

to Vehicle Power (VPWR),

CAUTION: A leaking

blown HO2S heater fuse.

fuel system poses a

OTHER CONDITION

potential fire hazard.

Restricted exhaust system,

Engine Cylinder Head

SENSOR CONDITION

Temperature Sensor (CHT) or

Sensor damaged or faulty

cooling system fault

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