Ford Galaxy / Ford S-MAX. Manual — part 825

Measure the voltage between relay DC21, socket
C1BB01A pin 107, circuit CDC01A (GN/VT), wiring

harness side and ground.

3

Does the meter display battery voltage?
Yes

GO to AF9

.

No

LOCATE and REPAIR the break in the circuit between
relay DC21 and the CJB using the Wiring Diagrams.
CHECK the operation of the system.

AF9: CHECK THE VOLTAGE AT RELAY DC21

Measure the voltage between relay DC21, socket
C1BB01A, pin 104, circuit SDC02H (RD), wiring

harness side and ground.

1

Does the meter display battery voltage?
Yes

GO to AF10

.

No

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

AF10: CHECK THE CIRCUIT BETWEEN RELAY DC21 AND FUSE F41 FOR OPEN CIRCUIT

Ignition switch in position 0.

1

Measure the resistance between relay DC21, socket
C1BB01A, pin 105, circuit CDC21F (GY/BN), wiring

harness side and fuse F42.

2

Is a resistance of less than 2 Ohms registered?
Yes

GO to AF11

.

No

LOCATE and REPAIR the break in the circuit between
relay DC21 and fuse F41 using the Wiring Diagrams.
CHECK the operation of the system.

AF11: CHECK THE GROUND CONNECTION OF DC21

Ignition switch in position 0.

1

Measure the resistance between DC21, connector
C1BB01-A, pin 106, circuit GD120P (BK/GN), wiring

harness side and ground.

2

Is a resistance of less than 2 Ohms registered?
Yes

RENEW relay DC21. CHECK the operation of the
system.

No

LOCATE and RECTIFY the break in the corresponding
circuit between DC21 and soldered connection SP358
with the aid of the Wiring Diagrams. CHECK the
operation of the system.

AF12: CHECK THE VOLTAGE AT THE GEM

Disconnect Connector C1BP02-G from the GEM.

1

Measure the voltage between the GEM, connector
C1BP02-G, pin 1, circuit SBB17A (RD), wiring

harness side and ground.

2

Does the meter display battery voltage?
Yes

GO to AF14

.

No

GO to AF13

.

AF13: CHECK FOR OPEN CIRCUIT BETWEEN THE CJB AND THE EJB

Disconnect Connector C1BB03-G from the EJB.

1

Measure the resistance between the CJB, connector
C1BP02-G, pin 1, circuit SBB17A (RD), wiring

harness side and the EJB, connector C1BB03-G, pin
1, circuit SBB17A (RD), wiring harness side.

2

Is a resistance of less than 2 Ohms registered?
Yes

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

No

LOCATE and RECTIFY the break in circuit SBB17A
(RD) between the EJB and the CJB with the aid of the
Wiring Diagrams. CHECK the operation of the
system.

AF14: CHECK THE VOLTAGE AT THE GEM

Measure the voltage between the GEM, connector
C1BP02-G, pin 2, circuit SBB18A (YE), wiring

harness side and ground.

1

Does the meter display battery voltage?
Yes

GO to AF16

.

No

GO to AF15

.

AF15: CHECK FOR OPEN CIRCUIT BETWEEN THE CJB AND THE EJB

Disconnect Connector C1BP03-H from the EJB.

1

Measure the resistance between the CJB, connector
C1BP02-G, pin 2, circuit SBB18A (YE), wiring

harness side and the EJB, connector C1BB03-H, pin
1, circuit SBB18A (YE), wiring harness side.

2

Is a resistance of less than 2 Ohms registered?
Yes

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

No

LOCATE and RECTIFY the break in circuit SBB18A
(YE) between the GEM and the EJB with the aid of
the Wiring Diagrams. CHECK the operation of the
system.

AF16: CHECK THE VOLTAGE AT THE GEM

Disconnect Connector C1BP02-A from the GEM.

1

Ignition switch in position II.

2

Measure the voltage between the GEM, connector
C1BP02-A, pin 65, circuit CBB41A (BU), wiring

harness side and ground.

3

Does the meter display battery voltage?

Yes

GO to AF18

.

No

GO to AF17

.

AF17: CHECK FOR OPEN CIRCUIT BETWEEN THE CJB AND THE EJB

Ignition switch in position 0.

1

Disconnect Connector C1BB01-A from the EJB.

2

Measure the resistance between the CJB, connector
C1BP02-A, pin 65, circuit CBB41A (BU), wiring

harness side and the EJB, connector C1BB01-A, pin
98, circuit CBB41A (BU), wiring harness side.

3

Is a resistance of less than 2 Ohms registered?
Yes

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

No

LOCATE and RECTIFY the break in circuit CBB41A
(BU) between the EJB and the CJB with the aid of the
Wiring Diagrams. CHECK the operation of the
system.

AF18: TEST THE GEM GROUND CONNECTION

Ignition switch in position 0.

1

Measure the resistance between the GEM, connector
C1BP02-A, pin 54, circuit GD123F (BK/GY), wiring

harness side and ground.

2

Is a resistance of less than 2 Ohms registered?
Yes

GO to AF19

.

No

LOCATE and REPAIR the break in circuit GD123F
(BK/GY) between the GEM and ground connection
GD123 with the aid of the Wiring Diagrams. CHECK
the operation of the system.

AF19: TEST THE GEM GROUND CONNECTION

Disconnect Connector C1BP02-B from the GEM.

1

Measure the resistance between the GEM, connector
C1BP02-B, pin 65, circuit GD134U (BK/VT), wiring

harness side and ground.

2

Is a resistance of less than 2 Ohms registered?
Yes

GO to AF20

.

No

LOCATE and REPAIR the break in circuit GD134U
(BK/VT) between the GEM and ground connection

GD134 with the aid of the Wiring Diagrams. CHECK
the operation of the system.

AF20: CHECK FOR OPEN CIRCUIT BETWEEN THE GEM AND THE DATA LINK
CONNECTOR (DLC)

CAUTION: The following measurement must only be performed using the Ford

approved diagnostic tool digital multimeter. Failure to observe this instruction can lead to
damage.

Measure the resistance between the GEM, connector
C1BP02-A, pin 50, circuit VDB07J (VT/OG), wiring

harness side and the DLC, connector C3DB04, pin
11, circuit VDB07D (GY/OG), wiring harness side.

1

Is a resistance of less than 2 Ohms registered?
Yes

GO to AF21

.

No

LOCATE and REPAIR the break in the circuit between
the GEM and the DLC using the Wiring Diagrams.
CHECK the operation of the system.

AF21: CHECK FOR OPEN CIRCUIT BETWEEN THE GEM AND THE DLC

CAUTION: The following measurement must only be performed using the Ford

approved diagnostic tool digital multimeter. Failure to observe this instruction can lead to
damage.

Measure the resistance between the GEM, connector
C1BP02-A, pin 49, circuit VDB06AC (GY/OG), wiring

harness side and the DLC, connector C3DB04, pin 3,
circuit VDB06X (GY/OG), wiring harness side.

1

Is a resistance of less than 2 Ohms registered?
Yes

GO to AF22

.

No

LOCATE and REPAIR the break in the circuit between
the GEM and the DLC using the Wiring Diagrams.
CHECK the operation of the system.

AF22: CHECK FOR OPEN CIRCUIT BETWEEN THE GEM AND THE DATA LINK
CONNECTOR (DLC)

CAUTION: The following measurement must only be performed using the Ford

approved diagnostic tool digital multimeter. Failure to observe this instruction can lead to
damage.

Disconnect Connector C1BP02-C from the GEM.

1

Measure the resistance between the GEM, connector
C1BP02-C, pin 47, circuit VDB04Y (WH/BU), wiring

harness side and the DLC, connector C3DB04, pin 6,
circuit VDB04L (WH/BU), wiring harness side.

2