Ford Falcon. Manual — part 328

412-04-25 Control

Components 412-04-25

DIAGNOSIS AND TESTING (Continued)

NOTE: Ensure that there are no restrictions to HVAC airflow or excessive heat pick-up in to HVAC air intake

before replacement of HIM.

NOTE: REFER to Section 412-02 SYMPTOM CHART BEFORE PROCEEDING

Test Step

Result / Action to Take

L1

WDS FUNCTIONAL TEST - HVAC BLOWER FAN

OPERATION

Run engine and ensure vehicle battery is at normal charge state.

Yes

System OK

Select Face / Floor outlet mode.

No

Select Recirc inlet mode.

Go to L2

Select full cold.

Set the HVAC blower fan speed to maximum using WDS scan tool
with PID “BLOWTP.

Is the HVAC Blower fan operating at full speed?

L2

VISUAL INSPECTION - HVAC BLOWER MOTOR POWER

FUSE

Check HVAC blower motor power supply fuse.

Yes

Replace the fuse

Is the fuse blown?

No

Go to L3

L3

ELECTRICAL INSPECTION - HVAC BLOWER MOTOR

POWER SUPPLY

Using a voltmeter, check that battery power is available at the HVAC

Yes

blower motor 2way connector C-221 Pin 1 lead 118B.

Go to L4

Is approx battery voltage present?

No

Repair wiring fault

L4

VISUAL INSPECTION - HVAC BLOWER MOTOR

Check HVAC blower motor current draw with a clamp type ammeter

Yes

attached on to the HVAC blower fan battery supply lead. Pin 1 of

Replace HVAC blower motor.

2way connector C-221 lead 118B.

No

Is the reading greater than 25 Amps?

Go to L5

L5

VISUAL INSPECTION - HVAC BLOWER MOTOR

Remove HVAC blower and inspect for lose or damaged impeller.

Yes

Replace HVAC blower motor.

Is impeller damaged or lose fit on motor shaft?

No

Go to L6

L6

WDS FUNCTIONAL TEST - HVAC BLOWER FAN

OPERATION

Reinstall the HVAC blower fan motor and operate at mid and full

Yes

speeds for 10 minutes each using WDS scan tool with PID

Go to L7

“BLOWTP”.

No

NOTE:

More time may be required to run the blower at each speed

System OK

during low ambient temperature conditions (cold weather).

Does the blower stop operating?

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412-04-26 Control

Components 412-04-26

DIAGNOSIS AND TESTING (Continued)

Test Step

Result / Action to Take

L7

WDS DTC CHECK - HVAC BLOWER FAN SPEED

CONTROLLER

Using WDS scan tool check DTC’s in HIM.

Yes

Replace HIM fi this DTC is consistently set.

Is DTC B2513 set?

No

System OK

PINPOINT TEST M : INPUT FUNCTION — CAN BUS. (ACC / MCC / HTR)

NOTE: REFER to Section 412-02 SYMPTOM CHART BEFORE PROCEEDING

Test Step

Result / Action to Take

M1

WDS FUNCTION TEST - REQUEST DIAGNOSTIC

SESSION

Turn ON ignition.

Yes

Clear DTC in HIM

Connect WDS Scan Tool.

System OK

Request Diagnostic session from HIM.

No

Does HIM acknowledge command?

Go to M2

M2

ELECTRICAL INSPECTION - HIM POWER SUPPLY

Using a voltmeter, check that Battery and Ignition power is available

Yes

to the HIM with ignition ON. Connect negative probe to vehicle

Go to M3

electrical ground point. Connect positive probe to each Pin 1 and then

No

Pin 2 of HIM 12 way connector C-376.

Repair power / wiring fault.

Is approx battery power available at both Pins?

M3

WDS FUNCTION TEST - REQUEST DIAGNOSTIC

SESSION

Check CAN bus wiring. Refer to section 418-00.

Yes

Refer to section 418-00 for CAN bus wiring fault

NOTE:

Care should be taken to ensure CAN bus wiring fault is not

repair instructions.

intermittent.

No

Is there a CAN bus wiring fault?

Go to M4

M4

WDS FUNCTION TEST - REQUEST DIAGNOSTIC

SESSION

Turn ON ignition.

Yes

Clear DTC in HIM

Connect WDS Scan Tool.

System OK

Request Diagnostic session from HIM.

No

Does HIM acknowledge command?

Replace HIM

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412-04-27 Control

Components 412-04-27

DIAGNOSIS AND TESTING (Continued)

PINPOINT TEST N : INPUT FUNCTION — CAN BUS MESSAGE RECEPTION (ACC / MCC / HTR)

NOTE: REFER to Section 412-02 SYMPTOM CHART BEFORE PROCEEDING

Test Step

Result / Action to Take

N1

WDS FUNCTION TEST - REQUEST HIM DTC’s

Turn ON ignition.

Yes

Go to N2

Connect WDS Scan Tool.

No

Request DTC’s from the HIM.

System OK

Is DTC code U1900 set?

N2

WDS FUNCTION TEST - REQUEST CAN BUS

COMMUNICATION FAULT PID DATA FOR ICC SYSTEM

Using WDS scan tool, request data from the HIM for PID B902.

Yes

Refer to ICC section 413-08.

Is ICC_MSG set?

No

Go to N3

N3

WDS FUNCTION TEST - REQUEST CAN BUS

COMMUNICATION FAULT PID DATA FOR BEM SYSTEM

Yes

Is BEM_MSG set?

Refer to BEM section 419-10.

No

Go to N4

N4

WDS FUNCTION TEST - REQUEST CAN BUS

COMMUNICATION FAULT PID DATA FOR PCM SYSTEM

Yes

Is PCM_MSG set?

Refer to ICC section 303-14.

No

System OK

PINPOINT TEST O : INPUT FUNCTION — HIM MODULE INTERNAL RAM MEMORY (ACC / MCC / HTR)

NOTE: The HVAC Climate Control system operation may be unpredictable in the event of this type of failure

condition. Operate the vehicle with great care until the fault is rectified by an authorised service dealer.

NOTE: The setting of this DTC is due to an internal failure of the HIM microprocessor RAM memory.

NOTE: Complete the test below before replacing the HIM.

NOTE: REFER to Section 412-02 SYMPTOM CHART BEFORE PROCEEDING

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412-04-28 Control

Components 412-04-28

DIAGNOSIS AND TESTING (Continued)

Test Step

Result / Action to Take

O1

MODULE CHECK - HIM MICROPROCESSOR INTERNAL

RAM CHECK

Run engine and ensure vehicle battery condition is of normal charge

Yes

state.

Replace HIM.

Connect WDS tester.

No

System OK.

Clear DTC’s in HIM.

Switch OFF the ignition and disconnect the HIM 12 and 2way
connectors C-376 from the HIM for 5 minutes and then reconnect
both connectors.

Turn the ignition ON and request DTC status from the HIM.

Is DTC code C2784 set?

PINPOINT TEST P : CABIN TEMPERATURE SENSOR OPERATION (HIGH SERIES/ACC)

NOTE: With the ignition key in the ignition or start position, the BEM provides power to the fan motor of the

cabin temperature module. With the ignition switch in the ignition position the BEM reads the analogue

temperature signal from the module and converts the analogue data into degrees Centigrade and transmits

this data on the CAN bus to the climate control system.
DTC’s will not be logged for invalid data when the ignition switch is in the off or accessories position.
The WDS service tool is to be used to program and check the calibration factor loaded into the BEM. This

calibration factor should be the same as the calibration factor identified on the CTS ID label.

NOTE: REFER to Section 412-02 SYMPTOM CHART BEFORE PROCEEDING

Test Step

Result / Action to Take

P1

CABIN TEMPERATURE SENSOR AIRFLOW

Start the engine and switch on the automatic climate control.

Yes

Go to P2

Place a small piece of tissue paper over the cabin temperature grille.

No

Ensure that the grille is completely covered.

Check for blockage of the cabin temperature

Does the tissue paper stick to the grille to indicate air being

sensor grille and remove any restrictions and

drawn into the cabin temperature sensor?

retest.
If result is still No replace the ICC. Section
413-08

P2

CABIN TEMPERATURE SENSOR READING

Using the WDS tester activate and monitor Pid INT_TEMP.

Yes

CTS is operating correctly.

Place a thermometer/temperature probe in front of the CTS grille and
check that the reading matches the INT_TEMP information on the

No

WDS tester.

CTS is faulty. Replace the ICC. Section 413-08

Using a hair dryer or similar blow warm air across the
thermometer/temperature probe and into the CTS grille.

Check that the temperature changes on the thermometer/temperature
probe match the INT_TEMP information on the WDS tester.

Does the temperature change on the thermometer/temperature
probe match the INT_TEMP information on the WDS?

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