Dodge Caliber. Manual - part 450

CHECK (R706) RT-RR SEAT WEIGHT SENSOR SIGNAL CIRCUIT FOR A SHORT TO (R701) SEAT WEIGHT
SENSOR 5 VOLT CIRCUIT

Disconnect the Right-Rear Seat Weight Sensor connector.

Measure the resistance between the (R706) RT-RR Seat Weight Sensor Signal circuit and the (R701) Seat Weight
Sensor 5 Volt circuit.

Is the resistance below 10K ohms?

Yes

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 OCCUPANT CLASSIFICATION MODULE SYSTEM VERIFICATION TEST.

Perform AIRBAG SYSTEM VERIFICATION TEST - VER 1.

>> Go To 7

CHECK (R728) SEAT WEIGHT SENSOR GROUND CIRCUIT FOR AN OPEN

Measure the resistance of the (R728) Seat Weight Sensor Ground circuit between the OCM C2 connector and the
Right-Rear Seat Weight Sensor connector.

Is the resistance below 5.0 ohms?

Yes

>> Replace the OCM in accordance with the Service Information.

Perform OCCUPANT CLASSIFICATION MODULE SYSTEM VERIFICATION TEST.

Perform AIRBAG SYSTEM 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 OCCUPANT CLASSIFICATION MODULE SYSTEM VERIFICATION TEST.

Perform AIRBAG SYSTEM VERIFICATION TEST - VER 1.

CHECKING STORED OR INTERMITTENT CODES

NOTE: Diagnose and repair all active codes before diagnosing stored codes. Refer to the Table of Contents
in this Section for a complete list of airbag system diagnostic procedures.
With the scan tool, record and erase all Airbag System Module DTCs.

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 related wiring and connectors for chaffed, pierced,
pinched, and partially broken wires, and for broken, bent, pushed out, corroded, and contaminated terminals. Repair
as necessary.

Reconnect all disconnected components and harness connectors.

WARNING: To avoid personal injury or death, turn the ignition on, then reconnect the battery.
With the scan tool, monitor for active codes while performing the following:

•

Wiggle the wiring harness and connectors of the related airbag circuit.

•

Continue the test until either a code becomes active or the problem area is isolated.

In the previous steps you have attempted to recreate the conditions responsible for setting the DTC in question /
causing the intermittent condition.

Are any ACTIVE DTCs present?

Yes

>> Select the appropriate diagnostic procedure from the Table of Contents in this section.

>> No problem found at this time. Perform the Occupant Classification Module System Verification Test in

this Section. Erase all codes before returning vehicle to customer.

RESTRAINTS - ELECTRICAL DIAGNOSTICS

8O - 197

B1B8C-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT PERFORMANCE

For a complete wiring diagram Refer to Section 8W.

8O - 198

RESTRAINTS - ELECTRICAL DIAGNOSTICS

•

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 between 8 and 12 mA.

Possible Causes

DRIVER SEAT TRACK POSITION SENSOR (STPS)

OCCUPANT CLASSIFICATION MODULE (OCM)

Diagnostic Test

CHECK FOR ACTIVE INTERNAL FAULTS, IGNITION FAULTS, BATTERY FAULTS, AND SEAT TRACK
POSITION SENSOR CIRCUIT HIGH OR LOW FAULTS IN THE OCCUPANT CLASSIFICATION MODULE
(OCM)

NOTE: Ensure the battery is fully charged.
Turn the ignition on.

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

Does the scan tool display any active DTCs relating to internal faults, ignition faults, battery faults, or
Seat Track Position Sensor Circuit High or Low 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 B1B8C-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT PERFORMANCE IS ACTIVE

With the scan tool, read OCM DTCs.

Does the scan tool display active: B1B8C-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT PERFOR-
MANCE?

Yes

>> Go To 3

>> Go To 4

PERFORM SEAT TRACK POSITION SENSOR PERFORMANCE TEST

With the scan tool, erase OCM DTCs.

Turn the ignition off, wait 10 seconds and then turn the ignition on.

Cycle the driver seat to the full forward position and then to the full rearward position.

Return the driver seat to its approximate original position.

Wait two minutes, and then with the scan tool, read OCM DTCs.

Does the scan tool display active: B1B8C-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT PERFOR-
MANCE?

Yes

>> Replace the Driver Seat Track Position Sensor in accordance with the Service Information.

Perform the *OCM VERIFICATION TEST-VER 1. (Refer to 8 - ELECTRICAL/RESTRAINTS - DIAGNO-
SIS AND TESTING) If DTC B1B8C-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT PERFOR-
MANCE returns active, replace the OCM in accordance with the Service Information.

>> Perform the *OCM VERIFICATION TEST-VER 1. (Refer to 8 - ELECTRICAL/RESTRAINTS - DIAGNO-

SIS AND TESTING)

RESTRAINTS - ELECTRICAL DIAGNOSTICS

8O - 199

TEST FOR AN INTERMITTENT CONDITION

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

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

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 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 active DTC in question.

Are any ACTIVE DTCs present?

Yes

>> Select the appropriate symptom from Symptom List.

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

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RESTRAINTS - ELECTRICAL DIAGNOSTICS

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