Ford Galaxy / Ford S-MAX. Manual - part 633

Is a voltage measured?
Yes

GO to B22

RENEW the blower control module. CHECK the
operation of the system. If the system is still not
working, CHECK the EATC module and INSTALL A
NEW ONE if necessary.

B22: CHECK THE CIRCUIT BETWEEN THE BLOWER CONTROL MODULE AND THE
BLOWER MOTOR FOR A SHORT TO GROUND

Ignition switch in position 0.

Disconnect Connector C2H123-B from the blower
motor.

Measure the resistance between the blower control
module, connector C2H123-A, pin 1, circuit

VH301A (YE/BU), wiring harness side and ground.

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

RENEW the blower control module. CHECK the
operation of the system. If the system is still not
working, CHECK the EATC module and INSTALL A
NEW ONE if necessary.

LOCATE and REPAIR the short to ground in circuit
VH301A (YE/BU) between the blower control
module and the blower motor with the aid of the
Wiring Diagrams. CHECK the operation of the
system.

PINPOINT TEST C : MALFUNCTION OF THE RECIRCULATED AIR FLAP -
VEHICLES WITH MANUAL AIR CONDITIONING

NOTE: The recirculated air flap is actuated by means of a DC motor. This motor is
actuated by the electronic automatic temperature control (EATC) module or automatic
temperature control (ATC) module for a maximum of 7 seconds after pressing the air
recirculation button. Opening and closing of the air recirculation flap is performed by
reversing the polarity of the applied voltage.
NOTE: Recirculated air mode is not available when the "Defrost/demist windscreen"
function is active.

TEST CONDITIONS

DETAILS/RESULTS/ACTIONS

C1: CHECK FUSE F27

Ignition switch in position 0.

CHECK Fuse F27 (CJB).

Is the fuse OK?
Yes

GO to C2

RENEW fuse F27 (10 A). CHECK the operation of
the system. If the fuse blows again, LOCATE and

REPAIR the short using the Wiring Diagrams.

C2: CHECK THE VOLTAGE AT FUSE F27

Connect Fuse F27 (CJB).

Measure the voltage between fuse F27 (10 A) and
ground.

Does the meter display battery voltage?
Yes

GO to C5

REPAIR the voltage supply to fuse F27 with the aid
of the Wiring Diagrams. CHECK the operation of
the system.

C3: CHECK FUSE F4

CHECK Fuse F4 (CJB).

Is the fuse OK?
Yes

GO to C4

RENEW fuse F4 (7.5 A). CHECK the operation of
the system. If the fuse blows again, LOCATE and
REPAIR the short using the Wiring Diagrams.

C4: CHECK THE VOLTAGE AT FUSE F4

Connect Fuse F4 (CJB).

Ignition switch in position II.

Measure the voltage between fuse F4 (7.5 A) and
ground.

Does the meter display battery voltage?
Yes

GO to C5

REPAIR the voltage supply to fuse F4 with the aid
of the Wiring Diagrams. CHECK the operation of
the system.

C5: CHECK THE VOLTAGE AT THE RECIRCULATED AIR FLAP ACTUATOR

Ignition switch in position 0.

Disconnect Connector C5H206 (RHD vehicles:
Connector C5H206 from the recirculated air flap

actuator.

Ignition switch in position II.

Measure the voltage at the recirculated air flap
actuator, connector C5H206 (RHD vehicles:

connector C6H206), between pin 2 and pin 4,
wiring harness side.

Actuate the recirculated air switch several times
during the measurement.

Is a voltage of at least 10 V measured with alternating
polarity?
Yes

CHECK the air recirculation flap for ease of
movement and correct operation. If the air
recirculation flap is OK, RENEW the air recirculation

flap actuator. CHECK the operation of the system.

GO to C6

C6: CHECK FOR OPEN CIRCUIT BETWEEN THE AIR RECIRCULATION FLAP ACTUATOR
AND THE A/C CONTROL ASSEMBLY

Ignition switch in position 0.

Disconnect Connector C2H101-C from the air
conditioning control assembly.

Measure the resistance between the recirculated
air flap actuator, connector C5H206, pin 2 (RHD

vehicles: connector C6H206, pin 4), circuit CH207C
(BU/GY), wiring harness side and the air
conditioning control assembly, connector C2H101-
C, pin 7, circuit CH207C (BU/GY), wiring harness
side.

Measure the resistance between the recirculated
air flap actuator, connector C5H206, pin 4 (RHD

vehicles: connector C6H206, pin 2), circuit CH208C
(GN/OG), wiring harness side and the air
conditioning control assembly, connector C2H101-
C, pin 6, circuit CH208C (GN/OG), wiring harness
side.

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

GO to C7

LOCATE and REPAIR the break in the
corresponding circuit between the recirculated air
flap actuator and the air conditioning control
assembly with the aid of the Wiring Diagrams.
CHECK the operation of the system.

C7: CHECK THE VOLTAGE AT THE AIR CONDITIONING CONTROL ASSEMBLY (PIN 1)

Measure the voltage between the air conditioning
control assembly, connector C2H101-C, pin 1,

circuit CBP27C (BU/RD), wiring harness side and
ground.

Does the meter display battery voltage?
Yes

GO to C9

GO to C8

C8: CHECK FOR OPEN CIRCUIT BETWEEN THE AIR CONDITIONING CONTROL
ASSEMBLY AND THE CJB

Disconnect Connector C1BP02-C from the CJB.

Measure the resistance between the air
conditioning control assembly, connector C2H101-

C, pin 1, circuit SBP27C (BU/RD), wiring harness
side and the CJB, connector C1BP02-C, pin 74,
circuit SBP27C (BU/RD), wiring harness side.

Is a resistance of less than 2 Ohms registered?
Yes

CHECK the CJB and RENEW as necessary. CHECK
the operation of the system.

LOCATE and RECTIFY the break in circuit SBP27C
(BU/RD) between the air conditioning control
assembly and the CJB with the aid of the Wiring
Diagrams. CHECK the operation of the system.

C9: CHECK THE VOLTAGE AT THE AIR CONDITIONING CONTROL ASSEMBLY (PIN 8)

Ignition switch in position II.

Measure the voltage between the air conditioning
control assembly, connector C2H101-C, pin 8,

circuit CBP04 (VT), wiring harness side and ground.

Does the meter display battery voltage?
Yes

GO to C11

GO to C10

C10: CHECK FOR OPEN CIRCUIT BETWEEN THE AIR CONDITIONING CONTROL
ASSEMBLY AND THE CJB

Ignition switch in position 0.

Disconnect Connector C1BP02-C from the CJB.

Measure the resistance between the air
conditioning control assembly, connector C2H101-

C, pin 8, circuit CBP04 (VT), wiring harness side
and the CJB, connector C1BP02-C, pin 68, circuit
CBP04T (VT), wiring harness side.

Is a resistance of less than 2 Ohms registered?
Yes

CHECK the CJB and RENEW as necessary. CHECK
the operation of the system.

LOCATE and RECTIFY the open circuit between the
air conditioning control assembly and the CJB using
the Wiring Diagrams. CHECK the operation of the

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