Chrysler 300/300 Touring/300C, Dodge Magnum. Manual - part 697

CHECK (R718) RT-FT SEAT WEIGHT SENSOR SIGNAL CIRCUIT FOR AN OPEN

Measure the resistance of the (R718) RT-FT Seat Weight Sensor Signal
circuit between the OCM C2 connector and the Right-Front Seat Weight
Sensor connector.

Is the resistance below 5.0 ohms?

Yes

>> Replace the Right-Front Seat Weight Sensor in accordance

with the Service Information. Perform OCS VERIFICATION
TEST - VER 1. If DTC B1B7E-PASSENGER SEAT WEIGHT
SENSOR 2 - RIGHT FRONT INPUT CIRCUIT LOW returns
active, replace the OCM in accordance with the Service
Information.

Perform OCS VERIFICATION TEST - VER 1.

NOTE: Do not attempt to repair the Seat Harness. Replace the Seat
Harness if the condition inspecting or testing for is present in the
Seat Harness.

Replace the Passenger Seat Harness in accordance with the
Service Information.

Perform OCS VERIFICATION TEST - VER 1.

CHECK (R701) SEAT WEIGHT SENSOR 5 VOLT CIRCUIT FOR AN OPEN

WARNING: To avoid personal injury or death, turn the ignition off,
disconnect the battery and wait two minutes before proceeding.
Disconnect the OCM C2 connector.

Measure the resistance of the (R701) Seat Weight Sensor 5 Volt circuit
between the OCM C2 connector and the Right-Front Seat Weight Sen-
sor connector.

Is the resistance below 5.0 ohms?

Yes

>> Replace the OCM in accordance with the Service Informa-

tion.

Perform OCS VERIFICATION TEST - VER 1.

NOTE: Do not attempt to repair the Seat Harness. Replace the Seat
Harness if the condition inspecting or testing for is present in the
Seat Harness.

Replace the Passenger Seat Harness in accordance with the
Service Information.

Perform OCS VERIFICATION TEST - VER 1.

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RESTRAINTS - ELECTRICAL DIAGNOSTICS

10.

TEST FOR INTERMITTENT CONDITION

With the scan tool, record and erase all DTCs from all Airbag modules.

If any ACTIVE codes are present they must be resolved before diagnosing any stored codes.

WARNING: To avoid personal injury or death, turn the ignition off, disconnect the battery and wait two min-
utes before proceeding.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.

Look for chafed, pierced, pinched, or partially broken wires and broken, bent, pushed out, spread, corroded, or con-
taminated terminals.

The following additional checks may assist you in identifying a possible intermittent problem.

Reconnect any disconnected components and harness connector.

WARNING: To avoid personal injury or death, turn the ignition on, then reconnect the battery.
With the scan tool, monitor active codes as you work through the following steps.

WARNING: To avoid personal injury or death, maintain a safe distance from all airbags while performing the
following steps.
Wiggle the wiring harness and connectors of the related airbag circuit or component.

If codes are related to the Driver Airbag circuits, rotate the steering wheel from stop to stop.

If only stored codes return, continue the test until the problem area has been isolated.

In the previous steps you have attempted to recreate the conditions responsible for setting the active DTC in ques-
tion.

Does the scan tool display any ACTIVE DTCs?

Yes

>> Select appropriate symptom from Symptom List.

>> No problem found at this time. Erase all codes before returning vehicle to customer.

RESTRAINTS - ELECTRICAL DIAGNOSTICS

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B1B7F-PASSENGER SEAT WEIGHT SENSOR 2 - RIGHT FRONT INPUT CIRCUIT
HIGH

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RESTRAINTS - ELECTRICAL DIAGNOSTICS

For a complete wiring diagram Refer to Section 8W.

•

When Monitored:
While the CAN bus ignition status is in IGN_RUN, the module checks the sensor input ranges.

•

Set Condition:
If the module detects that the sensor input is greater than 96 ± 0.6% of the (R701) Seat Weight Sensor 5 Volt
circuit voltage.

Possible Causes

PASSENGER SEAT HARNESS IMPROPERLY ROUTED

PASSENGER SEAT HARNESS WIRES CHAFED, PIERCED, PINCHED, PARTIALLY BROKEN

PASSENGER SEAT HARNESS CONNECTOR TERMINALS BROKEN, BENT PUSHED OUT, SPREAD,
CORRODED, CONTAMINATED

(R718) RT-FT SEAT WEIGHT SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE

(R718) RT-FT SEAT WEIGHT SENSOR SIGNAL CIRCUIT SHORTED TO (R701) SEAT WEIGHT SENSOR 5
VOLT CIRCUIT

(R728) SEAT WEIGHT SENSOR GROUND CIRCUIT OPEN

RIGHT-FRONT SEAT WEIGHT SENSOR

OCCUPANT CLASSIFICATION MODULE (OCM)

Diagnostic Test

CHECK FOR ACTIVE INTERNAL FAULTS, IGNITION FAULTS, AND BATTERY FAULTS IN THE OCCUPANT
CLASSIFICATION MODULE (OCM)

NOTE: Ensure the battery is fully charged.

NOTE: When reconnecting Airbag system components, the ignition must be turned off and the battery must
be disconnected.
Turn the ignition on, then off, and then on again.

With the scan tool, read Occupant Classification Module (OCM) DTCs.

Does the scan tool display any active DTCs relating to internal faults, ignition faults, or battery faults?

Yes

>> Diagnose and repair the DTCs. Refer to the Table of Contents in this Section for a complete list of

symptoms.

>> Go To 2

VERIFY THAT DTC B1B7F–PASSENGER SEAT WEIGHT SENSOR 2 - RIGHT FRONT INPUT CIRCUIT
HIGH IS ACTIVE

With the scan tool, read OCM DTCs.

Does the scan tool display active: B1B7F–PASSENGER SEAT WEIGHT SENSOR 2 - RIGHT FRONT
INPUT CIRCUIT HIGH?

Yes

>> Go To 3

>> Go To 9

RESTRAINTS - ELECTRICAL DIAGNOSTICS

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