Dodge Dakota (ND). Manual — part 405
B1B7F-PASSENGER SEAT WEIGHT SENSOR 2 - RIGHT FRONT INPUT CIRCUIT HIGH (CONTINUED)
8.
CHECK (R728) SEAT WEIGHT SENSOR GROUND CIRCUIT FOR AN OPEN
Measure the resistance of the (R728) Seat Weight Sensor Ground cir-
cuit between the OCM C2 connector and the Right-Front Seat Weight
Sensor 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.
No
>>
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.
9.
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 chaffed, pierced, pinched, or partially broken wires and broken, bent, pushed out, spread, corroded, or
contaminated 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
>> 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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B1B82-PASSENGER SEAT WEIGHT SENSOR 4 - LEFT REAR PERFORMANCE
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RESTRAINTS - ELECTRICAL DIAGNOSTICS
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B1B82-PASSENGER SEAT WEIGHT SENSOR 4 - LEFT REAR PERFORMANCE (CONTINUED)
For the Occupant Classification System circuit diagram (Refer to 8 - ELECTRICAL/RESTRAINTS - SCHEMATICS
AND DIAGRAMS).
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
When CAN ignitions status is Run or SNA, during auto zero and while performing the Occupant Classification
Module System Verification Test.
•
Set Condition:
During the occupant classification verification test: if the module detects that the sensor input is less than 1.4
volts or greater than 3.6 volts. During auto zero: if the module detects that the sensor input is less than 1 volt
or greater than 4 volts.
Possible Causes
PASSENGER SEAT HARNESS WIRES CHAFFED, PIERCED, PINCHED, PARTIALLY BROKEN
PASSENGER SEAT HARNESS CONNECTOR TERMINALS BROKEN, BENT PUSHED OUT, SPREAD,
CORRODED, CONTAMINATED
LEFT-REAR PASSENGER SEAT WEIGHT SENSOR
DAMAGE TO THE PASSENGER SEAT STRUCTURE, RISER ASSEMBLY, CROSSMEMBERS, SEAT TRACKS,
FLOOR PAN
OCCUPANT CLASSIFICATION MODULE (OCM)
Diagnostic Test
1.
CHECK FOR ACTIVE INTERNAL FAULTS, IGNITION FAULTS, & 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.
No
>> Go To 2
2.
VERIFY THAT DTC B1B82–PASSENGER SEAT WEIGHT SENSOR 4 - LEFT REAR PERFORMANCE IS
ACTIVE
With the scan tool, read OCM DTCs.
Does the scan tool display active: B1B82–PASSENGER SEAT WEIGHT SENSOR 4 - LEFT REAR PERFOR-
MANCE?
Yes
>> Go To 3
No
>> Go To 5
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RESTRAINTS - ELECTRICAL DIAGNOSTICS
ND
B1B82-PASSENGER SEAT WEIGHT SENSOR 4 - LEFT REAR PERFORMANCE (CONTINUED)
3.
INSPECT PASSENGER SEAT HARNESS WIRES & CONNECTORS
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 Passenger Seat Harness wiring and connectors. Look
for chaffed, pierced, pinched, or partially broken wires and broken, bent, pushed out, spread, corroded, or contam-
inated terminals.
Are any of these conditions present?
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 OCS VERIFICATION TEST - VER 1.
No
>> Go To 4
4.
PERFORM OCCUPANT CLASSIFICATION MODULE SYSTEM VERIFICATION TEST
Verify that all of the Seat Weight Sensor mounting screws are torqued to specification. Refer to 23 - BODY/SEATS.
WARNING: To avoid personal injury or death, turn the ignition on, then reconnect the battery.
NOTE: Failure to follow test instructions or aborting the test will cause faults to set when performing the
Occupant Classification Module System Verification Test. To prevent faults due to process errors: Verify
That All Tests Steps That Led You Here Were Performed As Directed; Verify That The Ignition Is In Run; Wait
30 Seconds After Changing The Seat Weight Before Proceeding To Allow The System To Stabilize; Only
Press Scan Tool Buttons When Directed To Do So; & Perform The Occupant Classification Module System
Verification Test To Completion.
With the scan tool in OCM, select More Options, select System Tests, and select Occupant Classification Module
System Verification Test. Run the test by following the instructions displayed on the scan tool. When the test is
complete, wait two minutes, and then proceed as follows.
With the scan tool, read OCM DTCs.
Does the scan tool display any active PASSENGER SEAT WEIGHT SENSOR PERFORMANCE DTCs?
Yes
>> Perform the *Diagnosis/Checkout Procedure For Seat Weight Sensors.
No - But Other DTCs Present
Diagnose and repair the DTCs. Refer to the Table of Contents in this Section for a complete list of
symptoms.
No - No Active DTCs Present
Perform OCS VERIFICATION TEST - VER 1.
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RESTRAINTS - ELECTRICAL DIAGNOSTICS
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