Ford Galaxy / Ford S-MAX. Manual — part 985

SHORT TO BATTERY

TEST CONDITIONS

DETAILS/RESULTS/ACTIONS

BX1: CHECK THE PAD SWITCH DISABLE CIRCUIT FOR A SHORT TO BATTERY OR
IGNITION

WARNING: To avoid accidental deployment, the RCM backup power supply must be

depleted. Wait at least one minute after disconnecting the battery ground cable(s) before
commencing any repair or adjustment to the SRS, or any component(s) adjacent to the
SRS sensors. Failure to follow these instructions may result in personal injury.
NOTE: Use a digital multimeter for all electrical measurements.

Ignition switch in position 0.

1

Deactivate the SRS.

2

Disconnect RCM C2R114-A.

3

Disconnect PAD Switch C2R224-B.

4

Measure the voltage between the RCM C2R114-
A pin 21, circuit CR225A (YE), harness side and

ground.

5

Is any voltage present?
Yes

REPAIR circuit CR225A (YE). REPEAT the self-
test, CLEAR the DTCs. REACTIVATE the system.

No

REPEAT the self-test, CLEAR the DTCs.
REACTIVATE the system.

PINPOINT TEST BY : DTC B1D75 13: PAD SWITCH DISABLE CIRCUIT OPEN
CIRCUIT OR HIGH RESISTANCE

TEST CONDITIONS

DETAILS/RESULTS/ACTIONS

BY1: CHECK FOR CONTINUITY BETWEEN THE RCM AND THE PAD SWITCH

WARNING: To avoid accidental deployment, the RCM backup power supply must be

depleted. Wait at least one minute after disconnecting the battery ground cable(s) before
commencing any repair or adjustment to the SRS, or any component(s) adjacent to the
SRS sensors. Failure to follow these instructions may result in personal injury.
NOTE: CHECK that the PAD switch is in the air bag live position before carrying out this
test.

Ignition switch in position 0.

1

Deactivate the SRS.

2

Disconnect RCM C2R114-A.

3

Disconnect PAD Switch C2R224-B.

4

Measure the resistance between the RCM C2R114-A
pin 21, circuit CR225A (YE), harness side and the

PAD switch C2R224-B pin 4, circuit CR225A (YE),
harness side.

5

Is the resistance less than 5 ohms?

Yes

REPEAT the self-test, CLEAR the DTCs. REACTIVATE
the system.

No

REPAIR circuit CR225A (YE). REPEAT the self-test,
CLEAR the DTCs. REACTIVATE the system.

PINPOINT TEST BZ : DTC B1D75 19: PAD SWITCH DISABLE CIRCUIT
CROSS LINK TO ANOTHER FIRING CIRCUIT

TEST

CONDITIONS

DETAILS/RESULTS/ACTIONS

BZ1: CHECK THE PAD SWITCH CIRCUITS

WARNING: To avoid accidental deployment, the RCM backup power supply must be

depleted. Wait at least one minute after disconnecting the battery ground cable(s) before
commencing any repair or adjustment to the SRS, or any component(s) adjacent to the
SRS sensors. Failure to follow these instructions may result in personal injury.
NOTE: Use a digital multimeter for all electrical measurements.

Deactivate the SRS.

1

Disconnect RCM C2R114-A.

2

Disconnect Inoperative Air Bag Module Simulator.

3

NOTE: Refer to the Wiring Diagrams for pin detail.

Measure the resistance between the RCM C2R114-A pin 21, circuit
CR225A (YE), harness side and the inoperative air bag module circuits.

4

Is the resistance greater than 10,000 ohms?
Yes

REPEAT the self-test, CLEAR the DTCs. REACTIVATE the system.

No

REPAIR the circuits. REPEAT the self-test, CLEAR the DTCs. REACTIVATE
the system.

PINPOINT TEST CA : DTC B1D75 1A: PAD SWITCH DISABLE CIRCUIT
SHORT CIRCUIT

TEST CONDITIONS

DETAILS/RESULTS/ACTIONS

CA1: CHECK THE PAD SWITCH WIRING HARNESS FOR SHORT CIRCUIT

WARNING: To avoid accidental deployment, the RCM backup power supply must be

depleted. Wait at least one minute after disconnecting the battery ground cable(s) before
commencing any repair or adjustment to the SRS, or any component(s) adjacent to the
SRS sensors. Failure to follow these instructions may result in personal injury.
NOTE: Use a digital multimeter for all electrical measurements.

Deactivate the SRS.

1

Disconnect RCM C2R114-A.

2

Measure the resistance between the RCM
C2R114-A pin 18, circuit CR224A (GN), harness

side and the RCM C2R114-A pin 21, circuit
CR225A (YE), harness side.

3

Is the resistance less than 5 ohms?
Yes

REPAIR circuit CR224A (GN) and circuit CR225A
(YE). REPEAT the self-test, CLEAR the DTCs.

REACTIVATE the system.

No

GO to CA2

.

CA2: CHECK THE PAD SWITCH WIRING HARNESS FOR A SHORT TO GROUND

Measure the resistance between the RCM
C2R114-A pin 21, circuit CR225A (YE), harness

side and ground.

1

Is the resistance less than 5 ohms?
Yes

REPEAT the self-test, CLEAR the DTCs.
REACTIVATE the system.

No

REPAIR circuit CR225A (YE). REPEAT the self-
test, CLEAR the DTCs. REACTIVATE the system.

PINPOINT TEST CB : DTC B1D75 1E: PAD SWITCH DISABLE CIRCUIT
RESISTANCE OUT OF RANGE

TEST CONDITIONS

DETAILS/RESULTS/ACTIONS

CB1: CHECK THE PAD SWITCH CIRCUIT FOR CONTINUITY

WARNING: To avoid accidental deployment, the RCM backup power supply must be

depleted. Wait at least one minute after disconnecting the battery ground cable(s) before
commencing any repair or adjustment to the SRS, or any component(s) adjacent to the
SRS sensors. Failure to follow these instructions may result in personal injury.
NOTE: CHECK that the PAD switch is in the air bag live position before carrying out this
test.

Deactivate the SRS.

1

Disconnect RCM C2R114-A.

2

Measure the resistance between the RCM C2R114-
A pin 13, circuit RR129A (YE/GY), harness side

and the RCM C2R114-A pin 21, circuit CR225A
(YE), harness side.

3

Is the resistance less than 5 ohms?
Yes

REPEAT the self-test, CLEAR the DTCs.
REACTIVATE the system.

No

GO to CB2

.

CB2: CHECK FOR CONTINUITY BETWEEN THE RCM AND THE PAD SWITCH

Disconnect PAD Switch C2R224-B.

1

Measure the resistance between the RCM C2R114-
A pin 21, circuit CR225A (YE), harness side and

the PAD switch C2R224-B pin 4, circuit CR225A
(YE), harness side.

2

Is the resistance less than 5 ohms?
Yes

GO to CB3

.

No

REPAIR circuit CR225A (YE). REPEAT the self-test,
CLEAR the DTCs. REACTIVATE the system.

CB3: CHECK FOR CONTINUITY BETWEEN THE RCM AND THE PAD SWITCH COMMON
CIRCUIT

Measure the resistance between the RCM C2R114-
A pin 13, circuit RR129A (YE/GY), harness side

and the PAD switch C2R224-B pin 5, circuit
RR129C (YE/GY), harness side.

1

Is the resistance less than 5 ohms?
Yes

INSTALL a new PAD switch.
REFER to:

Passenger Air Bag Deactivation (PAD)

Switch

(501-20B Supplemental Restraint System,

Removal and Installation).
REPEAT the self-test, CLEAR the DTCs.
REACTIVATE the system.

No

REPAIR circuit RR129C (YE/GY). REPEAT the self-
test, CLEAR the DTCs. REACTIVATE the system.

PINPOINT TEST CC : DTC U0010 88: CONTROL MODULE COMMUNICATION
BUS OFF

TEST CONDITIONS

DETAILS/RESULTS/ACTIONS

CC1: CHECK THE RCM COMMUNICATION BUS CIRCUIT FOR A SHORT CIRCUIT

WARNING: To avoid accidental deployment, the RCM backup power supply must be

depleted. Wait at least one minute after disconnecting the battery ground cable(s) before
commencing any repair or adjustment to the SRS, or any component(s) adjacent to the
SRS sensors. Failure to follow these instructions may result in personal injury.
NOTE: Use a digital multimeter for all electrical measurements.

Deactivate the SRS.

1

Disconnect RCM C2R114-A.

2

Measure the resistance between the RCM
C2R114-A pin 19, circuit VDB06AB (GY/OG),

harness side and the RCM C2R114-A pin 20,
circuit VDB07H (VT/OG), harness side.

3