Ford Galaxy / Ford S-MAX. Manual — part 647

Wiring Diagrams. CHECK the operation of the
system.

PINPOINT TEST L : FAULT IN LEFT-HAND CENTRE VENTS AIR OUTLET
TEMPERATURE SENSOR CIRCUIT - VEHICLES WITH ELECTRONIC
AUTOMATIC TEMPERATURE CONTROL (EATC)

TEST CONDITIONS

DETAILS/RESULTS/ACTIONS

L1: CHECK VOLTAGE AT LEFT-HAND CENTER VENTS AIR OUTLET TEMPERATURE
SENSOR

Ignition switch in position 0.

1

Disconnect Connector C2H414-A from left-hand
centre vents air outlet temperature sensor.

2

Ignition switch in position II.

3

Switch on the air conditioning (A/C).

4

Measure the voltage between the left-hand centre
vents air outlet temperature sensor, connector

C2H414-A, pin 1, circuit VH409A (WH), wiring
harness side and ground.

5

Is a voltage of approx. 5 volts measured?
Yes

GO to L3

.

No

GO to L2

.

L2: CHECK THE CIRCUIT BETWEEN THE LEFT-HAND CENTER VENTS AIR OUTLET
TEMPERATURE SENSOR AND THE ELECTRONIC AUTOMATIC TEMPERATURE CONTROL
(EATC) MODULE FOR OPEN CIRCUIT

Ignition switch in position 0.

1

Disconnect Connector C2H101-B from the EATC
module.

2

Measure the resistance between the left-hand centre
vents air outlet temperature sensor, connector

C2H414-A, pin 1, circuit VH409A (WH),wiring
harness side and the EATC module, connector
C2H101-B, pin 10, circuit VH409A (WH), wiring
harness side.

3

Is a resistance of less than 2 Ohms registered?
Yes

CHECK the EATC module, if necessary INSTALL a
new one. CHECK the operation of the system.

No

LOCATE and REPAIR the break in circuit VH409A
(WH) between the left-hand centre vents air outlet
temperature sensor and the EATC module using the
Wiring Diagrams. CHECK the operation of the
system.

L3: CHECK THE CIRCUIT BETWEEN THE LEFT-HAND CENTER VENTS AIR OUTLET
TEMPERATURE SENSOR AND THE ELECTRONIC AUTOMATIC TEMPERATURE CONTROL
(EATC) MODULE FOR OPEN CIRCUIT

Ignition switch in position 0.

1

Disconnect Connector C2H101-B from the EATC
module.

2

Measure the resistance between the left-hand centre
vents air outlet temperature sensor, connector

C2H414-A, pin 3, circuit RH105R (GN), wiring
harness side and the EATC module, connector
C2H101-B, pin 17, circuit RH105T (GN), wiring
harness side.

3

Is a resistance of less than 2 Ohms registered?
Yes

GO to L4

.

No

LOCATE and REPAIR the break in the circuit between
the left-hand center vents air outlet temperature
sensor and the EATC module using the Wiring
Diagrams. CHECK the operation of the system.

L4: CHECK FOR SHORT CIRCUIT BETWEEN THE LEFT-HAND CENTER VENTS AIR
OUTLET TEMPERATURE SENSOR AND THE EATC MODULE

Measure the resistance between the EATC module,
connector C2H101-B, pin 10, circuit VH409A (WH),

wiring harness side and the EATC module, connector
C2H101-B, pin 17, circuit RH105T (GN), wiring
harness side.

1

Is a resistance of more than 10,000 Ohms measured?
Yes

GO to L5

.

No

LOCATE and REPAIR the short in the circuits between
the left-hand centre vents air outlet temperature
sensor and the EATC module using the Wiring
Diagrams. CHECK the operation of the system.

L5: CHECK FOR SHORT CIRCUIT TO GROUND BETWEEN THE LEFT-HAND CENTER
VENTS AIR OUTLET TEMPERATURE SENSOR AND THE EATC MODULE

Measure the resistance between the EATC module,
connector C2H101-B, pin 10, circuit VH409A (WH),

wiring harness side and ground.

1

Is a resistance of more than 10,000 Ohms measured?
Yes

RENEW the left-hand centre vents air outlet
temperature sensor. CHECK the operation of the
system.

No

LOCATE and REPAIR the short to ground in the
circuits between the left-hand center vents air outlet
temperature sensor and the EATC module using the
Wiring Diagrams. CHECK the operation of the
system.

PINPOINT TEST M : FAULT IN LEFT-HAND FOOTWELL AIR OUTLET
TEMPERATURE SENSOR CIRCUIT - VEHICLES WITH ELECTRONIC
AUTOMATIC TEMPERATURE CONTROL (EATC)

TEST CONDITIONS

DETAILS/RESULTS/ACTIONS

M1: CHECK VOLTAGE AT LEFT-HAND FOOTWELL AIR OUTLET TEMPERATURE SENSOR

Ignition switch in position 0.

1

Disconnect Connector C2H414-C from left-hand
footwell air outlet temperature sensor.

2

Ignition switch in position II.

3

Switch on the air conditioning (A/C).

4

Measure the voltage between the left-hand footwell
air outlet temperature sensor, connector C2H414-C,

pin 1, circuit VH410A (GY/BU), wiring harness side
and ground.

5

Is a voltage of approx. 5 volts measured?
Yes

GO to M3

.

No

GO to M2

.

M2: CHECK THE CIRCUIT BETWEEN THE LEFT-HAND FOOTWELL AIR OUTLET
TEMPERATURE SENSOR AND THE ELECTRONIC AUTOMATIC TEMPERATURE CONTROL
(EATC) MODULE FOR OPEN CIRCUIT

Ignition switch in position 0.

1

Disconnect Connector C2H101-B from the EATC
module.

2

Measure the resistance between the left-hand
footwell air outlet temperature sensor, connector

C2H414-C, pin 1, circuit VH410A (GY/BU), wiring
harness side and the EATC module, connector
C2H101-B, Pin 9, circuit VH410A (GY/BU), wiring
harness side.

3

Is a resistance of less than 2 Ohms registered?
Yes

CHECK the EATC module, if necessary INSTALL a
new one. CHECK the operation of the system.

No

LOCATE and REPAIR the break in circuit VH410A
(GY/BU) between the left-hand footwell air outlet
temperature sensor and the EATC module using the
Wiring Diagrams. CHECK the operation of the
system.

M3: CHECK THE CIRCUIT BETWEEN THE LEFT-HAND FOOTWELL AIR OUTLET

TEMPERATURE SENSOR AND THE ELECTRONIC AUTOMATIC TEMPERATURE CONTROL
(EATC) MODULE FOR OPEN CIRCUIT

Ignition switch in position 0.

1

Disconnect Connector C2H101-B from the EATC
module.

2

Measure the resistance between the left-hand
footwell air outlet temperature sensor, connector

C2H414-C, pin 3, circuit RH105S (GN), wiring
harness side and the EATC module, connector
C2H101-B, pin 17, circuit RH105T (GN), wiring
harness side.

3

Is a resistance of less than 2 Ohms registered?
Yes

GO to M4

.

No

LOCATE and REPAIR the break in the circuit between
the left-hand footwell air outlet temperature sensor
and the EATC module using the Wiring Diagrams.
CHECK the operation of the system.

M4: CHECK FOR SHORT CIRCUIT BETWEEN THE LEFT-HAND FOOTWELL AIR OUTLET
TEMPERATURE SENSOR AND THE EATC MODULE

Measure the resistance between the EATC module,
connector C2H101-B, pin 9, circuit VH410A (GY/BU),

wiring harness side and the EATC module, connector
C2H101-B, pin 17, circuit RH105T (GN), wiring
harness side.

1

Is a resistance of more than 10,000 Ohms measured?
Yes

GO to M5

.

No

LOCATE and REPAIR the short in the circuits between
the left-hand footwell air outlet temperature sensor
and the EATC module using the Wiring Diagrams.
CHECK the operation of the system.

M5: CHECK FOR SHORT CIRCUIT TO GROUND BETWEEN THE LEFT-HAND FOOTWELL
AIR OUTLET TEMPERATURE SENSOR AND THE EATC MODULE

Measure the resistance between the EATC module,
connector C2H101-B, pin 9, circuit VH410A (GY/BU),

wiring harness side and ground.

1

Is a resistance of more than 10,000 Ohms measured?
Yes

RENEW the left-hand footwell air outlet temperature
sensor. CHECK the operation of the system.