Ford Falcon. Manual - part 326

412-04-17 Control 

Components 412-04-17

DIAGNOSIS AND TESTING (Continued)

Test Step

Result / Action to Take

B4

MODULE FUNCTION CHECK - EVAPORATOR SENSOR

TEMPERATURE

Reconnect the sensor 2 way connector D to the HIM.

Yes

System OK.

Connect WDS Scan Tool.

No

Read the A_CT value (Evaporator sensor temperature) from the HIM.

Go to B5

Does the value closely match the temperature thermometer
located in the face outlet (+/- 5 degC) as per table B?

B5

MODULE FUNCTION CHECK - EVAPORATOR SENSOR

SUPPLY VOLTAGE

Check the Evaporator sensor supply voltage with a voltmeter.

Yes

Go to B6

With the Evaporator sensor 2 way connector D inserted in to the HIM,
attach the positive probe to pin 2 (LHS) and the negative probe to pin

No

1 (RHS) of the rear of the Evaporator sensor connector. Refer to

Replace HIM.

Evaporative sensor connector diagram for correct pin designations.

Using table B, compare the voltage reading against a temperature
probe located in the face outlet with the HVAC Blower fan operating at
high speed.

Does the voltage value closely match the temperature
thermometer located in the face outlet (+/- 5 degC)?

B6

MODULE OUTPUT CHECK - EVAPORATOR SENSOR

SUPPLY VOLTAGE

Remove evaporator sensor plug from HIM.

Yes

System OK.

Using a voltmeter, attach the probes to the HIM output terminals for

Clear DTC.

the evaporator sensor.

No

Ensure ignition key is ON.

Replace HIM.

Is the voltage reading within 4.5-5.5 Volts?

Temperature

Sensor

Sensor Voltage

Table B

Degrees

Resistance

(Volts)

NOTE: Use this table as a guide only. Minor

(Celsius)

(Ohms)

variations between actual readings are acceptable.

30

1.21k

0.96

Temperature

Sensor

Sensor Voltage

35

0.98k

0.81

Degrees

Resistance

(Volts)

40

0.75k

0.68

(Celsius)

(Ohms)

45

0.66k

0.57

-30

25.37k

4.16

50

0.55k

0.48

-25

18.90k

3.94

55

0.45k

0.41

-20

14.19k

3.68

-15

10.73k

3.39

-10

8.17k

3.08

-5

6.27k

2.76

0

4.85k

2.44

5

3.78k

2.13

10

2.97k

1.84

15

2.35k

1.56

20

1.87k

1.34

25

1.50k

1.14

A12342 en

412-04-18 Control 

Components 412-04-18

DIAGNOSIS AND TESTING (Continued)

PINPOINT TEST C : ACTUATOR — RECIRCULATION DOOR (ACC / MCC / HTR)

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

Test Step

Result / Action to Take

C1

SYSTEM ON DEMAND SELF TEST

Start and run engine until normal operating temperature is reached.

Yes

Go to C3

Ensure vehicle battery voltage is within normal operating range
(12~14volts) before proceeding with test.

No

Go to C2

Using WDS scan tool, clear all DTC’s set in the HIM memory.

Using WDS scan tool, perform HVAC On Demand Self Test.

Is code B1242 set?

C2

SYSTEM ON DEMAND SELF TEST - DTC CHECK

Yes

Is code B2416 set?

Go to C3

No

System OK

C3

VISUAL INSPECTION - RECIRC DOOR LEVER

ENGAGEMENT

Check Recirc door HVAC/HIM coupling levers for correct

Yes

engagement.

Reconnect levers.
Go to C1

Are the levers disengaged?

No

Go to C4

C4

WDS FUNCTIONAL TEST - FRESH / RECIRC

Turn Ignition ON and and run engine.

Yes

System OK

Connect WDS Scan Tool.

No

Remove glove compartment and visually check operation of the

Go to C5

Recirc door while selecting Recirc then Fresh using RECIRDTP.

Does the Recirc door fully seal at open and closed positions?

C5

VISUAL INSPECTION - RECIRC DOOR OBSTRUCTION

Check Recirc door and Recirc door coupling levers for interference

Yes

from external objects.

Remove obstructions.
Go to C1

Are there any obstructions?

No

Go to C6

C6

SYSTEM ON DEMAND SELF TEST - FAULT

RECONFIRMATION

Start and run engine until normal operating temperature is reached.

Yes

Replace HIM

Ensure vehicle battery voltage is within normal operating range
(12~14volts) before proceeding with test.

No

System OK

Using WDS scan tool, record all DTC’s set in the HIM memory.

Using WDS scan tool, clear all DTC’s set in the HIM memory.

Using WDS scan tool, perform HVAC On Demand Self Test.

Is code B1242 set again?

A12342 en

412-04-19 Control 

Components 412-04-19

DIAGNOSIS AND TESTING (Continued)

PINPOINT TEST D : ACTUATOR — SCREEN / FACE DOOR (ACC / MCC / HTR)

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

Test Step

Result / Action to Take

D1

SYSTEM ON DEMAND SELF TEST

Start and run engine until normal operating temperature is reached.

Yes

Go to D2 if code B1262 is set.

Ensure vehicle battery voltage is within normal operating range

Go to D2 if code B2926 is set.

(12~14volts) before proceeding with test.

No

Using WDS scan tool, record all DTC’s set in the HIM memory.

System OK Refer to Section 413-08.

Using WDS scan tool, clear all DTC’s set in the HIM memory.

Using WDS scan tool, perform HVAC On Demand Self Test.

Are any DTC codes set?

D2

WDS FUNCTIONAL TEST - SCREEN

Turn Ignition ON and and run engine.

Yes

Go to D3

Connect WDS Scan Tool.

No

Select Screen using CCACTM.

Replace HIM

Does the air flow from the Screen outlet?

D3

WDS FUNCTIONAL TEST - FACE

Select Face using CCACTM.

Yes

System OK

Does the air flow from the Face outlet?

No

Replace HIM

PINPOINT TEST E : ACTUATOR — PASSENGER AIR TEMPERATURE MIX. (ACC / MCC / HTR)

NOTE: This actuator is utilized to control air temperature to both passenger and driver by the single zone

manual climate control system. It is used to control only the passenger side air temperature for dual zone

automatic climate control system.

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

Test Step

Result / Action to Take

E1

SYSTEM ON DEMAND SELF TEST

Start and run engine until normal operating temperature is reached.

Yes

Go to E2 if code B1266 is set.

Ensure vehicle battery voltage is within normal operating range

Go to E2 if code B2013 is set.

(12~14volts) before proceeding with test.

No

Using WDS scan tool, record all DTC’s set in the HIM memory.

System OK Refer to Section 413-08.

Using WDS scan tool, clear all DTC’s set in the HIM memory.

Using WDS scan tool, perform HVAC On Demand Self Test.

Are any DTC codes set?

A12342 en

412-04-20 Control 

Components 412-04-20

DIAGNOSIS AND TESTING (Continued)

Test Step

Result / Action to Take

E2

WDS FUNCTIONAL TEST - PASSENGER AIR MIX FULL

HOT

Connect WDS Scan Tool.

Yes

Go to E3

Turn Ignition ON and and run engine.

No

Ensure engine is running and at normal operating temperature.

Ensure engine cooling system is operating

Select Passenger Full Hot using PBDTP.

correctly.
Go to E3

Is the airflow from the HVAC hot (LHS for ACC system, Both
sides for MCC / HTR)?

E3

WDS FUNCTIONAL TEST - PASSENGER AIR MIX FULL

COLD

Select Passenger Full Cold using PBDTP.

Yes

System OK

Is the airflow from the HVAC cool (LHS for ACC system, Both
sides for MCC / HTR)?

No

Replace HIM if DTC code B1266 or B2013 is
set.

NOTE: The temperature test is a subjective check

Incorrect temperature performance without the setting

only and careful assessment must be performed to

of either DTC after performing the HVAC On Demand

correctly diagnose Full cooling and Full heating

Self Test does not necessitate replacement of the

operation from the HVAC. The temperature can vary

HIM.

depending on factors such as A/C ON/OFF (where

fitted), environment air temperature drawn in to HVAC

unit and engine coolant system level and temperature.

PINPOINT TEST F : ACTUATOR — FLOOR / CONSOLE DOOR

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

Test Step

Result / Action to Take

F1

SYSTEM ON DEMAND SELF TEST

Start and run engine until normal operating temperature is reached.

Yes

Go to F2 if code B2010 is set.

Ensure vehicle battery voltage is within normal operating range

Go to F2 if code B2011 is set.

(12~14volts) before proceeding with test.

No

Using WDS scan tool, record all DTC’s set in the HIM memory.

System OK Refer to Section 413-08.

Using WDS scan tool, clear all DTC’s set in the HIM memory.

Using WDS scan tool, perform HVAC On Demand Self Test.

Are any DTC codes set?

F2

WDS FUNCTIONAL TEST - FLOOR OPEN

Turn Ignition ON and and run engine.

Yes

Go to F3

Connect WDS Scan Tool.

No

Select Floor using CCACTM.

Replace HIM

Does the air flow from the Floor outlet?

F3

WDS FUNCTIONAL TEST - FLOOR CLOSED

Select Face using CCACTM.

Yes

System OK

Does the air flow from the Floor outlet?

No

Replace HIM

A12342 en