Ford Falcon. Manual — part 323

412-04-5 Control

Components 412-04-5

DESCRIPTION AND OPERATION (Continued)

CAN Bus Information

CAN Bus Electrical System Diagram

Information

Receiver ACC MCC HTR

Data Transmitted by the HIM

Description

Information

Receiver ACC MCC HTR

A/C OFF display Icon

ICC

YES

NO

NO

Description

Blower fan manual

ICC

YES

NO

NO

Air Inlet mode (Fresh /

ICC

YES YES YES

speed selection

Recirc)

Drivers side

ICC

YES

NO

NO

Air Outlet mode (Face

ICC

YES YES YES

temperature selection

/ Floor / Screen)

Passenger side

ICC

YES

NO

NO

Person display Icon

ICC

YES YES YES

temperature selection

A/C display Icon

ICC

NO

YES

NO

Ambient temperature

ICC

YES

NO

NO

A/C MAX display Icon

ICC

NO

YES

NO

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412-04-6 Control

Components 412-04-6

DESCRIPTION AND OPERATION (Continued)

Information

Receiver ACC MCC HTR

Sharing of Vehicle Electric control.

Description

Sub-Systems

Not dependant on engine

Climate control mode

ICC

YES

NO

NO

Information via

vacuum like AU.

(AUTO / SEMI / OFF)

Serial CAN data

bus

Blower fan motor

PCM

YES YES YES

operating speed

Outlet Air Delivery Electric control.

voltage

Mode Control

Not dependant on engine

vacuum.

Evaporator core

PCM

YES YES

NO

surface temperature

Ingress Air

Electric control.

Delivery Control

Not dependant on engine

A/C Compressor

PCM

YES YES

NO

vacuum.

engagement request,

(SwitchON)

Outlet Air

Electric control.

Temperature

Not dependant on engine

Information Received by the HIM

Control

vacuum.

HVAC Blower Fan 14 selectable speeds + Off -

Information

Sender

ACC MCC HTR

Speed Control

MCC system.

Description

10 selectable speeds + Off +

Engine RPM

PCM

YES YES YES

Infinitely variable in Auto mode -

Vehicle road speed

PCM

YES YES YES

ACC system

DTC Logging Enable

PCM

YES YES YES

HVAC Blower Fan Self re-setting thermal overload

Over Current

protection.

A/C Load reduction

PCM

YES YES

NO

Protection

Engine coolant

PCM

YES

NO

NO

Vehicle Battery

Minimises HVAC blower fan

temperature

Voltage Fluctuation speed fluctuation due to vehicle

Engine cylinder count

PCM

YES

NO

NO

Compensation

system electrical overloads.

Blower / Temperature

ICC

NO

YES YES

Automatic Climate Dual air temperature control for

knob positions

Control

front seat occupants.

Climate Control push

ICC

YES YES YES

Evaporator Core

Direct connection to HIM.

buttons

Temperature

ICC Module type

ICC

YES YES YES

Sensor

(Auto / Manual

Continuous

Continuous self diagnosis of

climate)

System Fault Self

HVAC system operation with

Ignition switch

BEM

YES YES YES

Diagnosis

event capture.

accessory position

System On-Demand Self Test

via WDS service tool.

Cabin temperature

BEM

YES

NO

NO

sensor

Calibration

HVAC operating system

Upgrade via WDS

calibration upgrade via WDS

Sun load sensor

BEM

YES

NO

NO

service tool

service tool.

HIM Feature and Benefit Summary

Serviceability

Easy assembly - align levers, fit

Benefits

3 screws and insert 2

The greatest benefit of the new Climate control

connectors (3 with A/C option.)

system is due to the introduction of the serial data

CAN bus network. This reduces the wiring required to

interconnect sensors and electronic control

sub-systems. Sensors are monitored by one

electronic sub-system and then the information is

shared by any other electronic sub-system that is also

connected to the serial CAN bus. This also reduces

the total number of possible failures due to poor

electrical connection. It also has the greater benefit of

a single point connection to monitor and diagnose

many vehicle sub-systems via the serial data CAN

bus and WDS service tool.

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412-04-7 Control

Components 412-04-7

DIAGNOSIS AND TESTING

Please refer to FCSD (Ford Customer Service

HIM Module

Division) for latest Climate Control system calibration

version.

Module Configuration

Please refer to WDS manual for HIM calibration data

HIM

upgrade instructions.

The HIM may be configured to operate in one of three

Cabin Temperature Sensor Calibration

modes.

Factor

ACC

Automatic Climate Control with Dual

1. Whenever a cabin Temperature sensor, ICC or

Zone capabilities

BEM is replaced the CTS calibration factor needs

MCC

Standard Heating and Air Conditioning

to be taught to the BEM. Refer to Section 419-10.

(Manual climate control)

2. The CTS mounted on the ICC has a barcode

HTR

Heating system only

sticker attached to it. To obtain the calibration

HIM configuration is possible only via WDS service

factor “Ring the Oasis Hotline” with the Barcode

tool.

number they will provide a calibration factor to

enter into the BEM using the WDS.

Care must be taken to ensure that the module is

correctly configured to match the HVAC assembly

3. If a BEM is being replaced, the CTS calibration

type that is installed within the vehicle. Incorrect

factor can be read from the original BEM by the

configuration of the HIM can result in loss of HVAC

WDS using the request read memory block ($21)

system functionality and misdiagnosis of the HVAC

command ($0E is the relevant memory block for

system.

the CTS calibration factor). It can then be

downloaded into the new BEM using the request

To configure the following:

write memory block ($3B) command.

ICC

HVAC On-Demand Self Test

Refer to Section 413-08.

The HIM module has the ability to self diagnose most

BEM

internal circuits and components. Continuous self

diagnosis is performed while the ignition key is in the

Refer to Section 419-10.

RUN position and sufficient vehicle battery voltage is

PCM

available. Further to this, the HIM may be

commanded to perform additional self diagnosis by

Refer to Section 303-14.

the WDS service tool. DTC’s will be set as problems

HIM Calibration File Down Load

arise, where intermittent or permanent circuit failures

exist, from continuous self diagnosis or On-Demand

The HIM has the provision to accept update HVAC

Self Test by WDS service tool.

system calibration data.

Refer to DTC Chart for individual DTC descriptions. It

The calibration data contains many Climate Control

is important to note that when performing On-Demand

system operating parameters for ACC, MCC and HTR Self Test, the following pre-conditions must be met

operating modes. The system calibration data is

before starting and during the self test.

stored within the HIM’s internal microprocessor

The conditions include:

memory.

Ensure vehicle battery voltage is within 12 ~ 14.5

The Climate Control system calibration version details

volts.

can be checked using the WDS scan tool to request

the data from the HIM via PID “CAL_VER” (EEprom

Environment temperature is within 0 ~ +40

Calibration Version.)

degrees Celsius.

Please refer to Pin Point Test 412-04-I for further

Engine temperature is at normal operating

instructions in the event of failure to completely down

temperature.

load the calibration file data from WDS Scan Tool to

Record existing DTC’s within the HIM then clear

the HIM assembly.

before the test.

HIM Sub Function:

Internal Circuit Tests

ACC

MCC

HTR

Actuator - Face / Demist

Yes

Yes

Yes

Actuator - Floor / Console

Yes

Yes

Yes

Actuator - Recirculation

Yes

Yes

Yes

Actuator - Air Temperature (Cabin)

Yes

Yes

Yes

Actuator - Passenger Air Temperature (Cabin)

Yes

N/A

N/A

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412-04-8 Control

Components 412-04-8

DIAGNOSIS AND TESTING (Continued)

HIM Sub Function:

Internal Circuit Tests

ACC

MCC

HTR

Actuator - Driver Air Temperature (Cabin)

Yes

N/A

N/A

Sensor - External Air Temperature (Ambient)

Yes

N/A

N/A

Sensor - Evaporator Air Temperature

Yes

Yes

N/A

Blower fan variable speed controller

N/A

N/A

N/A

CAN Bus communication

Yes

Yes

Yes

Ignition supply voltage

Yes

Yes

Yes

Module configuration

Yes

Yes

Yes

Module actuator operating range calibration

Yes

Yes

Yes

NOTE: The codes may be logged due to intermittent

DTC Chart

and/or permanent circuit failures.

The following table lists all DTC’s that may be set by

the HIM due to system operation failures.

Displayed DTC

Description from MRDB Possible Causes

Action

B1242

(Recirculation Door

Recirc door jammed.

Go to section

Under travel)

Recirc lever fouled.

412-02, Pinpoint

Air Flow Recirculation

Low battery charge.

test D.

Door Driver Circuit

Internal module failure (HIM).

Failure

B1250

(Cabin Temperature

Invalid data code sent by vehicle Go to PinPoint Test

Sensor)

sub-system.

P.

Air Temperature

Internal Sensor Circuit

Failure (Cabin

Temperature Sensor)

B1255

Air Temperature

Sensor lead disconnected from

Go to PinPoint Test

External Sensor Circuit

module.

A.

Open

Sensor failure.

Internal module failure (HIM).

B1257

Air Temperature

Sensor leads shorted together.

Go to PinPoint Test

External Sensor Circuit

Sensor lead shorted to vehicle

A.

Short To Ground

body.

Sensor failure.

Internal module failure (HIM).

B1262

(Screen/Face Actuator

Door jammed.

Go to section

under travel)

Lever fouled.

412-02, Pinpoint

Servo Motor Defrost

Low battery.

test E.

Circuit Failure

Internal module failure (HIM).

(Screen/Face Actuator)

B1266

Servo Motor Air intake

Door jammed.

Go to section

Left Circuit Failure

Lever fouled.

412-02, Pinpoint

(Passenger Air

Low battery.

test G.

Temperature Actuator)

Internal module failure (HIM).

B1267

(Driver Air Temperature

Door jammed.

Go to section

Actuator Under travel)

Wiring harness fault.

412-02, Pinpoint

Servo Motor Air intake

Actuator fault.

test H.

Right Circuit Failure

Low battery.

(Driver Air Temperature

Internal module failure (HIM).

Actuator)

B1676

Battery Pack Voltage

Poor Battery charge voltage.

Go to PinPoint Test

Out Of Range

Battery overcharged.

H.

24 volt jump start.

Module internal circuit failure

(HIM).

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