Ford Galaxy / Ford S-MAX. Manual — part 648

No

LOCATE and REPAIR the short to ground 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.

PINPOINT TEST N : SUN LOAD SENSOR CIRCUIT FAULTY - VEHICLES WITH
ELECTRONIC AUTOMATIC TEMPERATURE CONTROL (EATC)

TEST CONDITIONS

DETAILS/RESULTS/ACTIONS

N1: CHECK THE VOLTAGE AT THE SUN LOAD SENSOR

Ignition switch in position 0.

1

Disconnect Connector C2H415 from the sun load
sensor.

2

Ignition switch in position II.

3

Switch on the air conditioning (A/C).

4

Measure the voltage between the sun load sensor,
connector C2H415, pin 1, circuit VH416B (VT/GY),

wiring harness side and ground.

5

Measure the voltage between the sun load sensor,
connector C2H415, pin 2, circuit VH417B (YE/OG),

wiring harness side and ground.

6

Is a voltage of approx. 5 volts measured in both
measurements?
Yes

GO to N4

.

No

GO to N2

.

N2: CHECK THE CIRCUITS BETWEEN THE SUN LOAD 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 sun load sensor,
connector C2H415, pin 1, circuit VH416B (VT/GY),

wiring harness side and the EATC module, connector
C2H101-B, Pin 22, circuit VH416A (VT/GY), wiring
harness side.

3

Measure the resistance between the sun load sensor,

4

connector C2H415, pin 2, circuit VH417B (YE/OG),
wiring harness side and the EATC module, connector
C2H101-B, Pin 23, circuit VH417A (YE/OG), wiring
harness side.

Is a resistance of less than 2 Ohms measured in both
cases?
Yes

GO to N3

.

No

LOCATE and REPAIR the break in the relevant circuit
between the sun load sensor and the EATC module
using the Wiring Diagrams. CHECK the operation of
the system.

N3: CHECK THE CIRCUITS BETWEEN THE SUN LOAD SENSOR AND THE EATC MODULE
FOR SHORT TO GROUND

Measure the resistance between the EATC module,
connector C2H101-B, pin 22, circuit VH416A

(VT/GY), wiring harness side and ground.

1

Measure the resistance between the EATC module,
connector C2H101-B, pin 23, circuit VH417A

(YE/OG), wiring harness side and ground.

2

Is a resistance greater than 10,000 Ohms measured in
both cases?
Yes

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

No

LOCATE and REPAIR the short to ground in the
relevant circuit using the Wiring Diagrams. CHECK
the operation of the system.

N4: CHECK THE GROUND CONNECTION OF THE SUN LOAD SENSOR

Ignition switch in position 0.

1

Measure the resistance between the sun load sensor,
connector C2H415, pin 3, circuit RH104FA (BU/BN),

wiring harness side and ground.

2

Is a resistance of less than 2 Ohms registered?
Yes

INSTALL a new sun load sensor. CHECK the
operation of the system.

No

GO to N5

.

N5: CHECK THE CIRCUIT BETWEEN THE SUN LOAD SENSOR AND THE ELECTRONIC
AUTOMATIC TEMPERATURE CONTROL (EATC) MODULE FOR OPEN CIRCUIT

Disconnect Connector C2H101-B from the EATC
module.

1

Measure the resistance between the sun load sensor,
connector C2H415, pin 3, circuit RH104FA (BU/BN),

wiring harness side and the EATC module, connector
C2H101-B, Pin 20, circuit RH104F (BU/BN), wiring
harness side.

2

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 the circuit between
the sun load sensor and the EATC module using the
Wiring Diagrams. CHECK the operation of the
system.

PINPOINT TEST O : INTERIOR TEMPERATURE SENSOR CIRCUIT FAULTY -
VEHICLES WITH ELECTRONIC AUTOMATIC TEMPERATURE CONTROL
(EATC)

NOTE: The interior temperature sensor is integrated in the sun load sensor.

TEST CONDITIONS

DETAILS/RESULTS/ACTIONS

O1: CHECK THE VOLTAGE AT THE PASSENGER COMPARTMENT TEMPERATURE SENSOR

Ignition switch in position 0.

1

Disconnect Connector C2H415 from the interior
temperature sensor .

2

Ignition switch in position II.

3

Switch on the air conditioning (A/C).

4

Measure the voltage between the interior
temperature sensor, connector C2H415, pin 4,

circuit VH414B (GN/BU), wiring harness side and
ground.

5

Is a voltage of approx. 5 volts measured?
Yes

GO to O3

.

No

GO to O2

.

O2: CHECK THE CIRCUIT BETWEEN THE INTERIOR 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 interior
temperature sensor, connector C2H415, pin 4,

circuit VH414B (GN/BU), wiring harness side and the
EATC module, connector C2H101-B, Pin 21, circuit
VH414A (GN/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 the circuit between
the passenger compartment temperature sensor and
the EATC module using the Wiring Diagrams. CHECK
the operation of the system.

O3: CHECK GROUND CONNECTION OF PASSENGER COMPARTMENT TEMPERATURE
SENSOR

Ignition switch in position 0.

1

Measure the resistance between the interior
temperature sensor, connector C2H415, pin 3,

circuit RH104FA (BU/GN), wiring harness side and
ground.

2

Is a resistance of less than 2 Ohms registered?
Yes

INSTALL NEW interior temperature sensor. CHECK
the operation of the system.

No

GO to O4

.