Ford Galaxy / Ford S-MAX. Manual — part 632

B10: CHECK THE CIRCUIT BETWEEN THE BLOWER RELAY H402 AND THE BLOWER
MOTOR FOR OPEN CIRCUIT

Measure the resistance between the blower relay
H402, socket C1BB01-A, pin 37, circuit CBB28B

GY/VT), wiring harness side and the blower motor,
connector C2H123-B, pin 1, circuit CBB28A
(GY/VT), wiring harness side.

1

Is a resistance of less than 2 Ohms registered?
Yes

GO to B12

.

No

GO to B11

.

B11: CHECK THE CIRCUIT BETWEEN THE EJB AND THE BLOWER MOTOR FOR OPEN
CIRCUIT

Disconnect Connector C1BB01-A from the EJB.

1

Measure the resistance between the EJB, connector
C1BB01-A, pin 37, circuit CBB28B (GY/VT), wiring

harness side and the blower motor, connector
C2H123-B, pin 1, circuit CBB28A (GY/VT), wiring
harness side.

2

Is a resistance of less than 2 Ohms registered?
Yes

CHECK the EJB and RENEW it if necessary. CHECK
the operation of the system.

No

LOCATE and REPAIR the break in the circuit
between the EJB and the blower motor using the
Wiring Diagrams. CHECK the operation of the
system.

B12: CHECK THE CIRCUIT BETWEEN BLOWER RELAY H402 AND THE CJB FOR OPEN
CIRCUIT

Disconnect Connector C1BP02-A from the CJB.

1

Measure the resistance between blower relay H402,
socket C1BB01-A, pin 38, circuit CH123A (VT/GN),

wiring harness side and the CJB, connector
C1BP02-A, pin 28, circuit CH123A (VT/GN), wiring
harness side.

2

Is a resistance of less than 2 Ohms registered?
Yes

CHECK blower relay H402 in accordance with the
component checks at the end of the section. If
blower relay H402 is OK, CHECK and of necessary
RENEW the CJB. CHECK the operation of the
system.

No

GO to B13

.

B13: CHECK FOR OPEN CIRCUIT BETWEEN THE EJB AND THE CJB

Disconnect Connector C1BB01-A from the EJB.

1

Measure the resistance between the EJB, connector
C1BB01-A, pin 38, circuit CH123A (VT/GN), wiring

harness side and the CJB, connector C1BP02-A, pin
28, circuit CH123A (VT/GN), wiring harness side.

2

Is a resistance of less than 2 Ohms registered?

Yes

CHECK the EJB and RENEW it if necessary. CHECK
the operation of the system.

No

LOCATE and REPAIR the break in circuit CH123A
(VT/GN) between the EJB and the CJB with the aid
of the Wiring Diagrams. CHECK the operation of the
system.

B14: CHECK THE GROUND CONNECTION OF THE BLOWER CONTROL MODULE

Ignition switch in position 0.

1

Disconnect Connector C2H123-A from the blower
control module.

2

Measure the resistance between the blower control
module, connector C2H123-A, pin 6, circuit

GD138AM (BK/WH), wiring harness side and
ground.

3

Is a resistance of less than 2 Ohms registered?
Yes

GO to B15

.

No

LOCATE and RECTIFY the break in the circuit
between the blower control module and ground
connection G6D139 with the aid of the Wiring
Diagrams. CHECK the operation of the system.

B15: CHECK THE VOLTAGE AT THE BLOWER CONTROL MODULE

Ignition switch in position II.

1

Measure the voltage between the blower control
module, connector C2H123-A, pin 2, circuit CBP18B

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

2

Does the meter display battery voltage?
Yes

GO to B17

.

No

GO to B16

.

B16: CHECK THE CIRCUIT BETWEEN THE BLOWER CONTROL MODULE AND THE CJB
FOR OPEN CIRCUIT

Ignition switch in position 0.

1

Disconnect Connector C1BP02-C from the CJB.

2

Measure the resistance between the blower control
module, connector C2H123-A, pin 2, circuit CBP18B

(GY/OG), wiring harness side and the CJB,
connector C1BP02-C, pin 69, circuit CBP18B
(GY/OG), wiring harness side.

3

Is a resistance of less than 2 Ohms registered?
Yes

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

No

LOCATE and REPAIR the break in circuit CBP18B
(GY/OG) between the blower control module and
the CJB with the aid of the Wiring Diagrams. CHECK
the operation of the system.

B17: CHECK THE CIRCUIT BETWEEN THE BLOWER CONTROL MODULE AND THE
ELECTRONIC AUTOMATIC TEMPERATURE CONTROL (EATC) MODULE FOR SHORT TO
GROUND

Ignition switch in position 0.

1

Measure the resistance between the blower control
module, connector C2H123-A, pin 4, circuit

VH101A (WH/VT), wiring harness side and ground.

2

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

GO to B18

.

No

LOCATE and REPAIR the short to ground in circuit
VH101A (WH/VT) between the blower control
module and the EATC module using the Wiring
Diagrams. CHECK the operation of the system.

B18: CHECK THE CIRCUIT BETWEEN THE BLOWER MOTOR AND THE BLOWER
CONTROL MODULE FOR OPEN CIRCUIT

Measure the resistance between the blower motor,
connector C2H123-B, pin 2, circuit VH301A

(YE/BU), wiring harness side and the blower control
module, connector C2H123-A, pin 1, circuit VH301A
(YE/BU), wiring harness side.

1

Is a resistance of less than 2 Ohms registered?
Yes

GO to B19

.

No

LOCATE and REPAIR the break in circuit VH301A
(YE/BU) between the blower motor and the blower

control module with the aid of the Wiring Diagrams.
CHECK the operation of the system.

B19: CHECK THE BLOWER CONTROL MODULE

Connect Connector C2H123-B to the blower motor.

1

Use a fused jumper lead (40 A) to connect the
blower control module, connector C2H123-A,

between pin 1, circuit VH301A (YE/BU), wiring
harness side and pin 6, circuit GD138AM (BK/WH),
wiring harness side.

2

Ignition switch in position II.

3

Does the blower motor run at full speed?
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.

No

RENEW the blower motor. CHECK the operation of
the system.

B20: CHECK CIRCUIT BETWEEN THE BLOWER CONTROL MODULE AND THE
ELECTRONIC AUTOMATIC TEMPERATURE CONTROL (EATC) MODULE FOR OPEN
CIRCUIT

Ignition switch in position 0.

1

Disconnect Connector C2H123-A from the blower
control module.

2

Disconnect Connector C2H101-B from the EATC
module.

3

Measure the resistance between the blower control
module, connector C2H123-A, pin 4, circuit

VH101A (WH/VT), wiring harness side and the EATC
module, connector C2H101-B, pin 15, circuit
VH101A (WH/VT), wiring harness side.

4

Is a resistance of less than 2 Ohms registered?
Yes

GO to B21

.

No

LOCATE and REPAIR the break in circuit VH101A
(WH/VT) between the blower control module and
the EATC module with the aid of the Wiring
Diagrams. CHECK the operation of the system.

B21: CHECK THE CIRCUIT BETWEEN THE BLOWER CONTROL MODULE AND THE
ELECTRONIC AUTOMATIC TEMPERATURE CONTROL (EATC) MODULE FOR SHORT TO
VOLTAGE

Ignition switch in position II.

1

Measure the voltage between the EATC module,
connector C2H101-B, pin 15, circuit VH101A

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

2