Ford Galaxy / Ford S-MAX. Manual — part 836

circuit VDB04BB (WH/BU), wiring harness side and the DLC, connector
C3DB04, pin 6, circuit VDB04L (WH/BU), wiring harness side.

Is a resistance of less than 2 Ohms registered?
Yes

GO to AI12

.

No

LOCATE and REPAIR the break in the circuit between the TCM and soldered
connection SP329 with the aid of the Wiring Diagrams. CHECK the
operation of the system.

AI12: CHECK FOR OPEN CIRCUIT BETWEEN THE TCM 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 TCM, connector C1ET34, pin 6, circuit
VDB05BB (WH), wiring harness side and the DLC, connector C3DB04, pin

14, circuit VDB05Z (WH), wiring harness side.

1

Is a resistance of less than 2 Ohms registered?
Yes

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

No

LOCATE and REPAIR the break in the circuit between the TCM and soldered
connection SP332 with the aid of the Wiring Diagrams. CHECK the
operation of the system.

PINPOINT TEST AJ : FAULTY COMMUNICATION BETWEEN THE MODULES -
MS CAN BUS

CAUTION: The measurements below may only be performed using the Ford

approved diagnostic tool digital multimeter. Failure to observe this instruction can lead to
damage.
NOTE: Failure of the complete MS CAN bus system can be caused by incorrectly engaged
wiring harness connectors at the CJB or in the A-pillar area. Ensure correct locking of
wiring harness connector.

TEST CONDITIONS

DETAILS/RESULTS/ACTIONS

AJ1: CHECK FUSE F26

Ignition switch in position 0.

1

CHECK Fuse F26 (CJB).

2

Is the fuse OK?
Yes

GO to AJ2

.

No

RENEW fuse F26 (5 A). CHECK the operation of
the system. If the fuse blows again, LOCATE and
REPAIR the short using the Wiring Diagrams.

AJ2: CHECK THE VOLTAGE AT FUSE F26

Connect Fuse F26 (CJB).

1

Measure the voltage between fuse F26 (5 A) and
ground.

2

Does the meter display battery voltage?
Yes

GO to AJ3

.

No

REPAIR the voltage supply to fuse F26 with the
aid of the Wiring Diagrams. CHECK the operation
of the system.

AJ3: CHECK THE VOLTAGE AT THE DATA LINK CONNECTOR (DLC)

Measure the voltage between the DLC, connector
C3DB04, pin 16, circuit SBP26A (YE/RD), wiring

harness side and ground.

1

Does the meter display battery voltage?
Yes

GO to AJ5

.

No

GO to AJ4

.

AJ4: CHECK THE CIRCUIT BETWEEN THE CJB AND THE DLC FOR CONTINUITY.

Disconnect Connector C1BP02-C from the CJB.

1

Measure the resistance between the CJB,
connector C1BP02-C, pin 73, circuit SBP26A

(YE/RD), wiring harness side and the DLC,
connector C3DB04, pin 16, circuit SBP26A
(YE/RD), wiring harness side.

2

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 RECTIFY the break in circuit SBP26A
(YE/RD) between the DLC and the CJB with the
aid of the Wiring Diagrams. CHECK the operation
of the system.

AJ5: CHECK THE GROUND CONNECTION OF THE DLC - PIN 4

Measure the resistance between the DLC,
connector C3DB04, pin 4, circuit GD138AS

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

1

Is a resistance of less than 2 Ohms registered?
Yes

GO to AJ6

.

No

LOCATE and REPAIR the open circuit between the
DLC and ground connection G6D139 with the aid
of the Wiring Diagrams. CHECK the operation of
the system.

AJ6: CHECK THE GROUND CONNECTION OF THE DLC - PIN 5

Measure the resistance between the DLC,

1

connector C3DB04, pin 5, circuit GD133BG (BK),
wiring harness side and ground.

Is a resistance of less than 2 Ohms registered?
Yes

GO to AJ7

.

No

LOCATE and REPAIR the break in circuit GD133BG
(BK) between the DLC and ground connection
G3D134 with the aid of the Wiring Diagrams.
CHECK the operation of the system.

AJ7: CHECK THE MS CAN BUS FOR SHORT CIRCUIT

Disconnect the ground cable from the battery.

1

Measure the resistance between the DLC,
connector C3DB04, between pin 3, circuit VDB06X

(GY/OG), wiring harness side and pin 11, circuit
VDB07D (VT/OG), wiring harness side.

2

Is a resistance of between 55 and 65 Ohm measured?
Yes

GO to AJ8

.

No

If a resistance between 115 and 120 Ohms is
measured:

GO to AJ12

.

If no resistance between 115 and 120 Ohms is
measured:

GO to AJ17

.

AJ8: PERFORM NETWORK TEST (RESTRAINTS CONTROL MODULE (RCM))

WARNINGS:

The backup power supply must be depleted to prevent the risk of accidental airbag

deployment. After disconnecting the battery, wait at least 1 minute before starting work
on the supplemental restraint system (SRS). Failure to follow this instruction may result
in personal injury.

In order to prevent the risk of accidental deployment, do not program any keycodes

while working on the supplemental restraint system. Failure to follow this instruction may
result in personal injury.

Never use terminal probes to test any connectors of the airbag systems or of any

other safety restraint systems. Failure to follow this instruction may result in personal
injury.
NOTE: After connecting the battery, initialize the power window motors.

Disconnect Connector C2R114-A the from
restraints control module.

1

Connect ground cable from battery.

2

Connect the diagnostic tool.

3

Select the vehicle with the Ford approved
diagnostic tool.

4

Is it possible to establish communications with the
GEM?
Yes

CHECK and if necessary RENEW the safety
restraint control module. CHECK the operation of
the system.

No

GO to AJ9

.

AJ9: PERFORM NETWORK TEST

NOTE: The number of modules connected to the MS CAN bus depends on the equipment
levels of the vehicle. Therefore not every vehicle will have all the modules mentioned
below.

Ignition switch in position 0.

1

Disconnect a listed component, then proceed with
the following test step:

Electronic automatic temperature control
(EATC) module: C2H101

Parking aid module: C4MP01-A

Trailer coupling module: C4AT23-C

Auxiliary climate control module: C3H101-A

Fuel fired booster heater /programmable fuel
fired booster heater: C1HF01C

Keyless vehicle module: C2PK28-D

Passenger side door module: C6PL01-B

Driver's side door module: C5PL01-B

Electronic instrument cluster: C2MC01

2

Select the vehicle with the Ford approved
diagnostic tool.

3

Is it possible to establish communications with the
GEM?
Yes

The component last disconnected is the cause of
the concern; CHECK and if necessary RENEW the
component. CHECK the operation of the system.

No

- If not all the listed components are
disconnected:DISCONNECT the next component
(go to test step 1).
- If all the listed components are disconnected:

GO

to AJ10

.

AJ10: CHECK THE MS CAN BUS FOR A SHORT TO VOLTAGE SUPPLY

Ignition switch in position 0.

1

Disconnect Connector C1BP02-A from the GEM.

2

Ignition switch in position II.

3