Ford Falcon. Manual — part 462

501-20b-63

Occupant Restraints — Passive

501-20b-63

DIAGNOSIS AND TESTING (Continued)

Test Step

Result / Action to Take

I2

CHECK THE SIDE AIRBAG MODULE BRIDGE

RESISTOR

Yes

WARNING:

If the supplemental restraint system (SRS) is

Using the flagged faults recorded in Step I1, GO

being serviced, the system must be deactivated and restraint system

to the appropriate pinpoint test step.

diagnostic tools must be installed. Refer to Airbag and Safety Belt

If a flagged fault of “?” was recorded in Step I1,

Pretensioner Supplemental Restraint System (SRS) in this section.

multiple faults exist and the entire pinpoint test
must be carried out before installing a new

The airbag restraint system diagnostic tools must be removed and

RCM.

the airbag modules reconnected when the system is reactivated to

For driver side airbag module (DFCURTN) with

avoid non-deployment in a collision, resulting in possible personal

a short to battery (STB) fault, Go to I4.

injury.

For driver side airbag module (DFCURTN) with
a short to ground (STG) fault, Go to I5.

For driver side airbag module (DFCURTN) with

WARNING:

Never probe the connectors on the airbag

an open circuit (O—CIR) fault, Go to I6.

module. Doing so can result in airbag deployment, which can result in

For driver side airbag module (DFCURTN) with

personal injury.

a low resistance (LOWRES) fault, Go to I8.

No

WARNING:

The safety belt buckle pretensioner is a

Fault Corrected. Go to I18.

pyrotechnic device. Never probe a pretensioner electrical connector.
Doing so could result in pretensioner or airbag deployment and could
result in personal injury.

WARNING:

Never probe the electrical connector on a side

airbag module. Doing so can result in side airbag deployment.

NOTE:

Diagnostics or repairs are not to be performed on a seat

equipped with a seat side airbag with the seat in the vehicle. Prior to
attempting to diagnose or repair a seat concern when equipped with a seat
side airbag, the seat must be removed from the vehicle and the restraint
system diagnostic tools must be installed in the seat side airbag electrical
connectors. The restraint system diagnostic tools must be removed
prior to operating the vehicle over the road.

NOTE:

After diagnosing or repairing an SRS, the restraint system

diagnostic tools must be removed before operating the vehicle over
the road.

NOTE:

After diagnosing or repairing a seat system, the restraint system

diagnostic tools must be removed before operating the vehicle over
the road.

NOTE:

The SRS must be fully operational and free of faults before

releasing the vehicle to the customer.

Key in OFF position.

Deactivate the system. Refer to Airbag and Safety Belt Pretensioner
Supplemental Restraint System (SRS) in the Diagnosis and Testing
portion of this section.

Disconnect RH Side Airbag Bridge Resistor.

Install a known good side airbag bridge resistor.

Enter the following diagnostic mode on the diagnostic tool:
On-Demand Self Test

Enter the following diagnostic mode on the diagnostic tool:
Flag DTC B2295

Was DTC B2295 retrieved during the on-demand self test?

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501-20b-64

Occupant Restraints — Passive

501-20b-64

DIAGNOSIS AND TESTING (Continued)

Test Step

Result / Action to Take

I3

CHECK THE DRIVER AND PASSENGER SIDE AIRBAG

MODULES

Yes

WARNING:

If the supplemental restraint system (SRS) is

Using the flagged faults recorded in Step I1, GO

being serviced, the system must be deactivated and restraint system

to the appropriate pinpoint test step.

diagnostic tools must be installed. Refer to Airbag and Safety Belt

If a flagged fault of “?” was recorded in Step I1,

Pretensioner Supplemental Restraint System (SRS) in this section.

multiple faults exist and the entire pinpoint test
must be carried out before installing a new

The airbag restraint system diagnostic tools must be removed and

RCM.

the airbag modules reconnected when the system is reactivated to

For driver side airbag module (DFCURTN) with

avoid non-deployment in a collision, resulting in possible personal

a short to battery (STB) fault, Go to I4.

injury.

For driver side airbag module (DFCURTN) with
a short to ground (STG) fault, Go to I5.

For driver side airbag module (DFCURTN) with

WARNING:

Never probe the connectors on the airbag

an open circuit (O—CIR) fault, Go to I6.

module. Doing so can result in airbag deployment, which can result in

For driver side airbag module (DFCURTN) with

personal injury.

a low resistance (LOWRES) fault, Go to I8.

For passenger side airbag module (PFCURTN)
with a short to battery (STB) fault, Go to I10.

WARNING:

The safety belt buckle pretensioner is a

For passenger side airbag module (PFCURTN)

pyrotechnic device. Never probe a pretensioner electrical connector.

with a short to ground (STG) fault, Go to I11.

Doing so could result in pretensioner or airbag deployment and could

For passenger side airbag module (PFCURTN)

result in personal injury.

with an open circuit (O/CIR) fault, Go to I12.

For passenger side airbag module (PFCURTN)

WARNING:

Never probe the electrical connector on a side

with a low resistance (LOWRES) fault, Go to

airbag module. Doing so can result in side airbag deployment.

I14.

NOTE:

Diagnostics or repairs are not to be performed on a seat

No

equipped with a seat side airbag with the seat in the vehicle. Prior to

If a flagged fault of “?” was recorded in Step I1,

attempting to diagnose or repair a seat concern when equipped with a seat multiple faults exist and the entire pinpoint test

side airbag, the seat must be removed from the vehicle and the restraint

must be carried out before installing a new side

system diagnostic tools must be installed in the seat side airbag electrical

airbag module.

connectors. The restraint system diagnostic tools must be removed

If a fault was flagged against driver side airbag

prior to operating the vehicle over the road.

module in Step I1, INSTALL a new driver side
airbag module. REFER to Side Airbag Module in

NOTE:

After diagnosing or repairing an SRS, the restraint system

this section. Go to I18.

diagnostic tools must be removed before operating the vehicle over

If a fault was flagged against passenger side

the road.

airbag module in Step I1, INSTALL a new
passenger side airbag module. REFER to Side

NOTE:

After diagnosing or repairing a seat system, the restraint system Airbag Module in this section. Go to I18.

diagnostic tools must be removed before operating the vehicle over
the road.

NOTE:

The SRS must be fully operational and free of faults before

releasing the vehicle to the customer.

Key in OFF position.

Deactivate the system. Refer to Airbag and Safety Belt Pretensioner
Supplemental Restraint System (SRS) in the Diagnosis and Testing
portion of this section.

Key in ON position.

Enter the following diagnostic mode on the diagnostic tool:
On-Demand Self Test

Was DTC B2295 retrieved during the on-demand self test?

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501-20b-65

Occupant Restraints — Passive

501-20b-65

DIAGNOSIS AND TESTING (Continued)

Test Step

Result / Action to Take

I4

CHECK CIRCUIT 1257 (WH) AND CIRCUIT 1258 (BR)

FOR A SHORT TO BATTERY BETWEEN THE RCM AND

THE DRIVER SIDE AIRBAG MODULE

Yes

NOTE:

Vehicles without side airbags are equipped with a side airbag

Go to I16.

bridge resistor on the seat.

No

Key in OFF position.

Due to the shorting bar feature in the electrical

Disconnect Driver Side Side Airbag Module Restraint System

connector, the fault can exist in either circuit.

Diagnostic Tool.

REPAIR circuit 1257 (WH) or circuit 1258 (BR).
Go to I18.

Vehicles with side airbags.

Disconnect RH Side Side Airbag Bridge Resistor.
Vehicles without side airbags.

Disconnect RCM C189b.

Key in ON position.

Measure the voltage between RCM C189b pin 3, circuit 1257 (WH),
harness side and ground; and between RCM C189b pin 4, circuit
1258 (BR), harness side and ground.

Are the voltages less than 0.2 volt?

I5

CHECK CIRCUIT 1257 (WH) AND CIRCUIT 1258 (BR)

FOR A SHORT TO GROUND BETWEEN THE RCM AND

THE DRIVER SIDE AIRBAG MODULE

Key in OFF position.

Yes

Go to I16.

Disconnect Driver Side Airbag Module Restraint System Diagnostic
Tool.

No

Vehicles with side airbags.

Due to the shorting bar feature in the electrical
connector, the fault can exist in either circuit.

Disconnect RH Side Side Airbag Bridge Resistor.

REPAIR circuit 1257 (WH) or circuit 1258 (BR).

Vehicles without side airbags.

Go to I18.

Disconnect RCM C189b.

Measure the resistance between RCM C189b pin 3, circuit 1257
(WH), harness side and ground; and between RCM C189b pin 4,
circuit 1258 (BR), harness side and ground.

Is the resistance greater than 1,000,000 ohms?

I6

CHECK CIRCUIT 1257 (WH) FOR AN OPEN BETWEEN

THE RCM AND THE DRIVER SIDE AIRBAG MODULE

Key in OFF position.

Yes

Go to I7.

Disconnect Driver Side Airbag Module Restraint System Diagnostic
Tool.

No

Vehicles with side airbags.

REPAIR circuit 1257 (WH). Go to I18.

Disconnect RH Side Airbag Module Bridge Resistor.
Vehicles without side airbags.

Disconnect RCM C189b.

For vehicles with side airbags, measure the resistance between

RCM C189b pin 3, circuit 1257 (WH), harness side and driver side
airbag module C342, circuit 1257 (WH), harness side.

For vehicles without side airbags, measure the resistance between

RCM C189b pin 3, circuit 1257 (WH), harness side and RH side
airbag bridge resistor C342, circuit 1257 (WH), harness side.

Is the resistance less than 0.5 ohm?

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501-20b-66

Occupant Restraints — Passive

501-20b-66

DIAGNOSIS AND TESTING (Continued)

Test Step

Result / Action to Take

I7

CHECK CIRCUIT 1258 (BR) FOR AN OPEN BETWEEN

THE RCM AND THE DRIVER SIDE AIRBAG MODULE

For vehicles with side airbags, measure the resistance between

Yes

RCM C189b pin 4, circuit 1258 (BR), harness side and driver side

Go to I16.

airbag module C342, circuit 1258 (BR), harness side.

No

For vehicles without side airbags, measure the resistance between REPAIR circuit 1258 (BR). Go to I18.

RCM C189b pin 4, circuit 1258 (BR), harness side and RH side airbag
bridge resistor C342, circuit 1258 (BR), harness side.

Is the resistance less than 0.5 ohm?

I8

CHECK FOR LOW RESISTANCE ON CIRCUIT 1257 (WH)

AND CIRCUIT 1258 (BR) BETWEEN THE DRIVER SIDE

AIRBAG MODULE AND THE RCM

Key in OFF position.

Yes

Go to I16.

Disconnect Driver Side Airbag Module Restraint System Diagnostic
Tool.

No

Vehicles with side airbags.

Go to I9.

Disconnect RH Side Side Airbag Bridge Resistor.
Vehicles without side airbags.

For vehicles with side airbags, measure the resistance between

driver side airbag module C342, circuit 1257 (WH) and 1258 (BR),
harness side.

For vehicles without side airbags, measure the resistance between

RH side airbag bridge resistor C342, circuit 1257 (WH) and circuit
1258 (BR), harness side.

Is the resistance greater than 10, 000 ohms?

I9

MEASURE THE RESISTANCE BETWEEN RCM CIRCUIT

1257 (WH) AND CIRCUIT 1258 (BR)

Disconnect RCM C189b.

Yes

REPAIR circuit 1257 (WH) and circuit 1258

Measure the resistance between RCM C189b pin 3, circuit 1257

(BR). Go to I18.

(WH), and pin 4, circuit 1258 (BR), component side.

No

Is the resistance greater than 10,000 ohms?

Go to I16.

I10

CHECK CIRCUIT 1259 (W/Y) AND CIRCUIT 1260 (BN/YE)

FOR A SHORT TO BATTERY BETWEEN THE RCM AND

THE PASSENGER SIDE AIRBAG MODULE

Key in OFF position.

Yes

Go to I16.

Disconnect Passenger Side Airbag Restraint System Diagnostic Tool.

No

Disconnect RCM C189b.

Due to the shorting bar feature in the electrical

Key in ON position.

connector, the fault can exist in either circuit.
REPAIR circuit 1259 (W/Y) or circuit 1260

Measure the voltage between RCM C189b pin 5, circuit 1259 (W/Y),

(BN/YE). Go to I18.

harness side and ground; and between RCM C189b pin 6, circuit
1260 (BN/YE), harness side and ground.

Are the voltages less than 0.2 volt?

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